NATIONAL ASSESSMENT GUIDELINE for the KOMO -product certificate for CEMENT and MASONRY ... ·...

BRL 2601 dated 2007-02-28

NATIONAL ASSESSMENT GUIDELINE

for the

KOMO®-product certificate

for

CEMENT and MASONRY CEMENT

Technology sector H1 Established by the joint Committee of Experts on Cement on 18 January 2007 Accepted by the Harmonisatie Commissie Bouw of the 'Stichting Bouwkwaliteit' on 3 April 2007

Published by:

BMC Certification

IKOB-BKB B.V.

All rights reserved

National Assessment Guideline 2601 Cement and Masonry cement dated 2007-02-28

BRL 2601 dated 2007-02-28

C E R T I F I C A T I E

Certification Institute BMC Ir.P. Bloklandhuis Büchnerweg 3 P.O. Box 150 2800 AD Gouda Phone: + 31 (0)182 532300 Fax: + 31 (0)182 570216

Accredited by the Dutch Council for Accreditation

PRODUCTS RvA C 004

CERTIFICATION SYSTEM : KOMO® PRODUCT CERTIFICATE This assessment guideline has been established by the joint Committee of Experts on Cement and was confirmed by the Board of the BMC Certification Institute. The general procedural requirements as applied by BMC, are stipulated in the BMC General Regulations on product certification, process certification and technical approval. This new edition of this assessment guideline replaces BRL 2601 dated 2003-12-01 and BRL 2603:1994 and became valid on the date it was established by the SKB 'Harmonisatie Commissie voor de Bouw'. N.B. This English version of assessment guideline BRL 2601 is a translation of the Dutch original. The Dutch version is legally binding in case of differences.

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CONTENTS Chapter page 1. INTRODUCTION ................................................................................................................. 6 1.1 Field of application ............................................................................................................... 6 2. DEFINITIONS ...................................................................................................................... 6 2.1 Delivery ................................................................................................................................ 6 2.2 Autocontrol ........................................................................................................................... 7 2.3 Cement factory..................................................................................................................... 7 2.4 Cement manufacturer .......................................................................................................... 7 2.5 Certificate holder.................................................................................................................. 7 2.6 Confirmation automated control........................................................................................... 7 2.7 Control period ...................................................................................................................... 7 2.8 External quality control......................................................................................................... 7 2.9 External inspection............................................................................................................... 7 2.10 Depot.................................................................................................................................... 8 2.11 Addressee............................................................................................................................ 8 2.12 Closed transport system ...................................................................................................... 8 2.13 Identification investigation.................................................................................................... 8 2.14 Intermediary ......................................................................................................................... 8 2.15 Quality manual ..................................................................................................................... 8 2.16 Mixing................................................................................................................................... 8 2.17 Dispatching centre ............................................................................................................... 8 2.18 Process control .................................................................................................................... 8 2.19 Process inaccuracy.............................................................................................................. 8 2.20 Product certificate Cement................................................................................................... 8 2.21 Product information.............................................................................................................. 8 2.22 Product specifications .......................................................................................................... 8 2.23 Recipe .................................................................................................................................. 9 2.24 Spot sample ......................................................................................................................... 9 2.25 Admission test...................................................................................................................... 9 2.26 Verification laboratory .......................................................................................................... 9 2.27 Verification investigation ...................................................................................................... 9 3. PERFORMANCE REQUIREMENTS................................................................................... 9 4. PRODUCT REQUIREMENTS ............................................................................................. 9 4.1 Additional (product) requirements...................................................................................... 10 4.2 Statements on the product certificate ................................................................................ 10 4.2.1 General .............................................................................................................................. 10 4.4.2 Manufacturer, products and origin ..................................................................................... 10 4.2.3 Specifications ..................................................................................................................... 10 4.2.4 Marks and delivery documents .......................................................................................... 10 4.2.5 Suggestions for the customer ............................................................................................ 11 5. QUALITY SYSTEM............................................................................................................ 11 5.1 Contents of the quality system........................................................................................... 11 5.1.1 Organizational structure..................................................................................................... 11 5.1.2 Management statement ..................................................................................................... 11 5.1.3 Training .............................................................................................................................. 11 5.1.4 Internal audits and management assessment ................................................................... 11 5.1.5 Preservation of the cement quality .................................................................................... 11 5.1.6 Contents of the quality manual .......................................................................................... 11 5.1.7 Product descriptions .......................................................................................................... 11 5.1.8 Description of the production process ............................................................................... 12 5.1.9 Sampling ............................................................................................................................ 12 5.1.10 Measurement and dispensing equipment.......................................................................... 12 5.1.11 Registration measurement data......................................................................................... 12

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5.1.12 Complaints ......................................................................................................................... 12 5.2 Management representative .............................................................................................. 12 6. PROCESS CONTROL....................................................................................................... 13 6.1 Clinker ................................................................................................................................ 13 6.2 Transport and storage........................................................................................................ 13 6.3 Process inaccuracy............................................................................................................ 13 6.4 Mixing................................................................................................................................. 13 6.4.1 General .............................................................................................................................. 13 6.4.2 Immediate loading into the means of transport.................................................................. 14 6.5 Cement silos ...................................................................................................................... 14 6.6 Control room panels........................................................................................................... 14 6.7 Sampling ............................................................................................................................ 14 6.8 Delivery of packaged and unpackaged cement................................................................. 14 6.9 Transport of cement........................................................................................................... 14 7. FACTORY PRODUCTION CONTROL.............................................................................. 15 7.1 Stipulations concerning the process control ...................................................................... 15 7.1.1 Recording the process control system............................................................................... 15 7.1.2 Raw materials .................................................................................................................... 15 7.1.2.1 Test schedule Fly Ash........................................................................................................ 15 7.1.3 Assessment of the suitability of mixing recipes ................................................................. 16 7.2 Storage period of the process control results .................................................................... 17 7.3 Stipulations concerning the process control ...................................................................... 17 7.3.1 Recording the autocontrol.................................................................................................. 17 7.4 Sampling and testing ......................................................................................................... 17 7.4.1 General .............................................................................................................................. 17 7.4.2 Sampling and testing of cement, either packaged or in bulk, shipped from silos.............. 17 7.4.3 Sampling and testing when the final product is not stored in silos .................................... 17 7.4.4 Measures in case of nonconformity with de product requirements ................................... 17 7.4.4.1 Measures in case of nonconformity of de static tests........................................................ 17 7.4.4.2 Measures in case of nonconformity of individual results ................................................... 18 7.4.5 Incidental production but regular shipment of cement ....................................................... 18 7.4.6 Incidental production and batch shipment ......................................................................... 18 7.5 Production stop .................................................................................................................. 18 7.6 Additional stipulations ........................................................................................................ 18 8. LABORATORY................................................................................................................... 19 8.1 Laboratory facilities ............................................................................................................ 19 8.2 Maintenance and management system............................................................................. 19 8.3 Calibration tests by cement manufacturers and verification laboratories.......................... 19 9. TRAINING.......................................................................................................................... 19 10. EXTERNAL INSPECTIONS............................................................................................... 19 10.1 Admission test.................................................................................................................... 20 10.1.1 Supply of information by by the cement manufacturer ...................................................... 20 10.1.2 Initial audit of a cement factory .......................................................................................... 20 10.1.3 Issue of a certificate valid for a period of four months ....................................................... 20 10.2 Control period .................................................................................................................... 20 10.3 Issue of a certificate ........................................................................................................... 20 10.4 External inspections subsequent to the issue of the certificate......................................... 21 10.4.1 Audits and inspection visits................................................................................................ 21 10.4.2 Assessment of the results of the autocontrol..................................................................... 21 10.4.3 Verification investigation .................................................................................................... 21 10.4.3.1 Sampling ............................................................................................................................ 21 10.4.3.2 Testing ............................................................................................................................... 22 10.4.4 Changes in the description of the properties of certified cement ...................................... 22 10.4.5 Requirements regarding the auditor / inspector ................................................................ 22

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11. QUALITY REGISTRATION................................................................................................ 23 12. OTHER OBLIGATIONS OF THE CEMENT MANUFACTURER....................................... 23 12.1 Changes in technical equipment, quality system and product properties ......................... 23 12.2 Transport documents ......................................................................................................... 23 12.3 Cement origin..................................................................................................................... 24 13. DEPOTS AND DISPATCHING CENTRES........................................................................ 24 14. DOCUMENTS.................................................................................................................... 24 Appendix A Supplementary tests ......................................................................................................... 26 Appendix B Regulations regarding the quality control pertaining to the shipment and transport of

cement in bulk by means of closed systems in vehicles and vessels, bearing a certificate that is valid up to the receiving station of the customer (as described in section 2.12) .... 28

Appendix C Schedule for inspection and maintenance of laboratory equipment.................................. 29 Appendix D Assessment of a depot or dispatching centre for certified cement in relation to the use of

the certification mark.......................................................................................................... 30 Appendix E Certification on the basis of product specifications formulated by the cement manufacturer.

........................................................................................................................................... 34 Appendix F Assessment of the product information supplied by the cement manufacturer................. 35 Appendix G Additional kA-values ........................................................................................................... 36 Appendix H Example of the text of a KOMO® product certificate for cement........................................ 37

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1. INTRODUCTION The requirements included in this assessment guideline will be used by the certification institutes,

accredited as such by the (Dutch) Council for Accreditation, during the handling of applications for and/or the continuation of a product certificate for cement and masonry cement. In this assessment guideline both cement and masonry cement will be denoted as "cement" unless specific conditions require the addition that reference is made to either cement or masonry cement. The quality declaration to be issued will be denoted as KOMO Product Certificate.

In the formulation of this assessment guideline optimal connectivity with the Building Decree has

been pursued, so that the quality declarations issued on the basis of this assessment guideline may qualify to be included in the "list of quality declarations, as referred to in 1, sub 1, part j, of the Woningwet (Housing Act) (Public Journal 91, 439), approved by the Parliamentary Undersecretary of VROM (The Dutch Ministry of Housing, Physical Planning and the Environment)." This list will be published every six months by the Stichting Bouwkwaliteit in collaboration with the acknowledged institutes. In terms of content this assessment guideline has been attuned to the rules and regulations in NEN-EN 197-1 (including document of alterations A1), NEN-EN 197-2, NEN-EN 197-4, NEN-EN 14216, NEN-EN 413-1 and NEN 3550.

In relation to the methodology recorded in NEN-EN 197-2 additional requirements have to be met

by the cement manufacturer and the certification institute regarding the assessment of the properties of the manufactured and marketed cement. Among other things this concerns:

a. In the scope of the quality control the cement manufacturer must participate in a round robin research as described in Appendix A. The outcome must demonstrate that the results of the quality control are sufficiently reliable.

b. The external inspection by the certification institute of the cement manufacturer and the manufactured cement will be conducted as recorded in Chapter 9 of this assessment guideline.

In this assessment guideline these additional requirements are indicated by shading.

The results obtained in the scope of the assessment of the cement manufacturer and the products for the CE marking of cement, can also be used for the assessment as required in this assessment guideline.

In addition to the requirements in this assessment guideline, the certification institutes will formulate

additional demands in the sense of general procedural requirements for certification as stipulated in the General Regulations on Certification of the institute concerned.

1.1 Field of application This assessment guideline applies to the situations listed below:

a. A cement factory (including possible depots) is assessed on the basis of this assessment guideline and may thus obtain the right to use the KOMO certification mark on the marketed cement.

b. A dispatching centre is assessed on the basis of this assessment guideline and may thus

obtain the right to market cement that was supplied under the KOMO certification mark, also using the KOMO certification mark.

2. DEFINITIONS 2.1 Delivery When bulk cement is transported from the factory or from the dispatching centre to the delivery site

by means of closed transport systems by or on behalf of the certificate holder, delivery is understood to be the transfer of the cement when it leaves the closed transport system.

In all other cases delivery is understood to be the transfer of the cement from the certificate holder to the transporter the moment the cement is shipped. The way of delivery has to be clearly stated in the delivery documents.

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2.2 Autocontrol Tests that are continuously conducted by the cement manufacturer on spot samples of cement taken

from the outlet point(s) of the product at the factory or at the depot. 2.3 Cement factory

A facility used by the cement manufacturer to produce cement, using equipment that is suitable for continuous mass production of cement, in particular with regard to grinding and/or homogenization, and with a production process controlled by the manufacturer to such an extent that it ensures the production of cement that continuously meets the requirements.

Explanation: The equipment may include clinker production units, grinding installations and the

corresponding mixing and shipping installations, which may or may not be grouped at one location. For more details refer to: "3.1.7 of CEN report CR 14245 Guidelines for the application of EN 197-2 ”Conformity Evaluation”.

2.4 Cement manufacturer

A company that may consist of one or more of the business departments listed below and that is fully responsible for the quality of one or more types of cement and actually puts this responsibility into practice. The business departments may concern:

a. the manufacturing of portland cement clinker and cement at one and the same location; b. a grinding installation used to manufacture cement by grinding supplied components; c. a mixing installation in which ground components and/or cement are mixed into a final

product. 2.5 Certificate holder A cement manufacturer or intermediary whose name is stated on the certificate and who possesses

the KOMO product certificate for the types of cement concerned 2.6 Confirmation automated control Tests that are continuously conducted by the intermediary on spot samples of cement taken from the

outlet point(s) of the product at the dispatching centre. Explanation: This investigation is conducted by or under the responsibility of the intermediary in order

to demonstrate that the properties of a cement are consistent with the cement stipulated in the delivery contract concluded between the cement manufacturer and the intermediary. (see also 3.1.13 of NEN-EN 197-2)

2.7 Control period The production and distribution period that is considered for the assessment of the results of the

autocontrol tests.

Explanation: For cement this period is usually 12 months and for masonry cement 24 months. During this

period, in this assessment guideline also referred to as the standard control period, the results of the autocontrol will be tested against the requirements.

Subsequent to the admission test a shorter control period of 3 months will be used. For this period

and one subsequent month the right to use the KOMO certification mark has been granted and there will be an accelerated investigation as to whether the cement meets the requirements.

2.8 External quality control See verification investigation. 2.9 External inspection All inspection activities conducted by the certification institute, including the external quality control

(verification investigation).

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2.10 Depot An installation for storage and transhipment of bulk cement, situated outside the cement factory,

from where cement (packaged or in bulk) is shipped and where the cement manufacturer is fully responsible for all aspects of the cement quality.

Explanation: The process management of the depot may be either in the hands of the cement

manufacturer or of a natural or legal person appointed by the cement manufacturer. 2.11 Addressee The person to whom the transporter has to deliver the cement as stated in the transport agreement

concluded by or on behalf of the certificate holder. 2.12 Closed transport system A system of means of transport and/or shipment and/or transhipment and/or storage, suitably

equipped to transport bulk cement and cut off from environmental influences, from the factory or the dispatching centre to the place of delivery.

2.13 Identification investigation An investigation conducted by or under the responsibility of the intermediary in order to demonstrate

that the properties of a cement are consistent with the cement stipulated in the delivery contract concluded between the cement manufacturer and the intermediary.

2.14 Intermediary A (legal) person who purchases certified bulk cement and supplies the cement onwards to third

parties. 2.15 Quality manual A document specifying the quality system of the cement factory (including possible depots) or the

dispatching centre. 2.16 Mixing Putting together raw materials (ground or not) and/or types of cement in such a way that a

homogeneous cement is obtained. 2.17 Dispatching centre An installation for storage and transhipment of bulk cement, situated outside the cement factory,

from where cement (packaged or in bulk) will be shipped and where the intermediary is responsible for all aspects of the cement quality.

2.18 Process control Continuous control of the production process, raw materials and intermediate products, to be

conducted by the manufacturer. 2.19 Process inaccuracy The process inaccuracy of a dispensing system is the maximum difference between the set value

and the actual value of the dispensed material. 2.20 Product certificate Cement A document issued by the certification institute, stating that the cement produced by a company is

supposed to meet the requirements concerning the quality of the product and the production process as stipulated in this assessment guideline.

2.21 Product information Information on the composition, the sustainability, the mechanical, physical and/or chemical

properties of the cement, supplied by the manufacturer. 2.22 Product specifications The specifications and the additional requirements on the composition, the sustainability, the

mechanical, physical and/or chemical properties of the cement, recorded by the cement

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manufacturer that are used for certification. 2.23 Recipe A document used by the cement manufacturer to produce a certain type of cement. The recipe will

at least include the following information: the amount, the type, the origin and the specifications of the components to be used.

2.24 Spot sample A sample of cement taken in one or more increments at a specific moment in time from a specific

amount of cement. 2.25 Admission test Inspection of the factory, the production process, the quality system (see 4 of this assessment

guideline), the process control and the factory production control and testing of the cement to be certified. If the requirements in this assessment guideline and in the relevant General Regulations on Certification are met, a certificate will be issued.

2.26 Verification laboratory A laboratory accepted by the certification institute, where the samples for the verification

investigation are tested. The laboratory must be able to demonstrate that it meets the requirements in NEN-EN-ISO/IEC 17025 for the tests involved.

2.27 Verification investigation Testing of a cement sample both by the cement manufacturer and by an independent laboratory,

appointed to that end by the certification institute. 3. PERFORMANCE REQUIREMENTS The survey below shows the way in which this assessment guideline links up with the Building

Order. Considered sections of the Building Order chapter section; paragraph General strength of the structure 2.1 2.4; 1b

The general strength of the structure is calculated in accordance with NEN 6720. 4. PRODUCT REQUIREMENTS Depending on the applicable standard, cement must meet the requirement in: - NEN-EN 197-1(ordinary types of cement): 6 and 7 of NEN-EN 197-1. In this case the composition of the cement must meet the limit

values stated in Table 1 of NEN-EN 197-1.If applicable the cement must also meet the aspects listed below:

a. cement with a low heat of hydration must meet 7.2.3 NEN-EN 197-1/A1; b. cement with a high sulphate resistance must meet 5.2 of NEN 3550. - NEN-EN 197-4 (blast furnace cement with low initial strength): 6 and 7 of NEN-EN 197-4. In this case the composition of the cement must meet the limit

values stated in Table 1 of NEN-EN 197-4. If applicable the cement must also meet 5.2 of NEN 3550.

- NEN-EN 14216 (special types of cement with a very low heat of hydration): 6 and 7 of NEN-EN 14216. In this case the composition of the cement must meet the limit

values stated in Table 1 of NEN-EN 14216. If applicable the cement must also meet 5.2 of NEN 3550.

- NEN-EN 413-1 (masonry cement): 5 of NEN-EN 413-1. In this case the composition of the masonry cement must meet the limit

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values stated in Table 1 of NEN-EN 413-1. 4.1 Additional (product) requirements Apart from the requirements in 3.1, the production process and the quality control, cement and

masonry cement must also meet one or more of the aspects listed below when the aspect is stated on the KOMO product certificate.

a. cement and masonry cement must meet the (additional) properties as recorded in a product specification by the cement manufacturer, all this in accordance with the stipulations in Appendix E;

b. The (additional) properties as recorded in the product information by the cement manufacturer, must meet the requirements as stipulated in Appendix F

c. The shipping control must meet the requirements in Appendix B in order to allow for certification of the cement up to delivery at the client's;

d. if a dispatching centre wants to market KOMO certified cement and masonry cement with the KOMO mark, the dispatching centre must meet the requirements stipulated in Appendix D.

For masonry cement with an air-entraining agent, the cement manufacturer must submit an air

content value (L) in addition to the requirements in Table 2 of NEN-EN 413-1. Subsequently the air content values measured by the cement manufacturer must be within ± 2% of the value he submitted and within the limit values 8 and 22% of the standard. These results will be assessed as indicated in Table 6 of NEN-EN 413-1 using the limit values L ± 2%.

In addition to Table 9 NEN-EN 413-1 the limit values for individual measurement results of the air content are: L ± 4%.

4.2 Statements on the product certificate 4.2.1 General The certificate indicates whether the cement originates from a cement factory or from a dispatching

centre. Furthermore, the certificate includes the product description(s), the (technical) specifications, a declaration from the certification institute, rules for the use of the certification mark and suggestions for the customer, all this as further explained below. A model of the product certificate has been included in Appendix H.

4.4.2 Manufacturer, products and origin This part of the certificate includes the product description(s) and information on the origin of the

cement. For a cement factory: the name and the address of the cement manufacturer and the production site. If applicable

the name of the importer or the sales organization will also be stated. For a dispatching centre: the name and the address of the dispatching centre, the cement manufacturer and the

production site. 4.2.3 Specifications The text of the technical specifications on the product certificate reads: The cement complies with

NEN-EN xxx (in accordance with the stipulations in 4.1 of this assessment guideline) and, if applicable, the criteria listed below:

a. for cement with a high sulphate resistance: the cement meets the requirements for high sulphate resistance as stated in 5.2 of NEN 3550;

b. for CEM III and VLH III cement containing more chloride than 0,10 % m/m: the chloride content may be higher than 0,10 % m/m;

4.2.4 Marks and delivery documents The certificate states that the products will be delivered with a delivery document including at least: - the information as referred to in 12.2; - KOMO-certification mark.

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4.2.5 Suggestions for the customer The suggestions for the customer will include various relevant points of attention as service to the customer.

5. QUALITY SYSTEM

The quality system has to meet the requirements recorded in NEN-EN 197-2 and must be attuned to the contents of this chapter of this assessment guideline.

5.1 Contents of the quality system

The manufacturer has to specify his quality system in writing and has to maintain it as a means to ensure that the types of cement and other products he manufactures, whether they are fitted with the KOMO certification mark or not, meet the specified requirements. The quality manual has to include the procedures for the quality system or must refer to them, and must explain the structure of the documentation used in the quality system. These regulations consider these procedures to be a part of the quality manual. The quality system of the cement manufacturer must at least include the aspects mentioned below.

5.1.1 Organizational structure

The organizational structure and the responsibilities of persons for drawing up and maintaining the quality system.

5.1.2 Management statement

A statement by the management regarding the policy, objective(s) and commitments regarding the product quality, as well as a statement by the management that the quality system as recorded in the quality manual has been approved by the management and is normative for the operational management.

5.1.3 Training

A procedure arranging for the training of all employees involved in operations that influence the cement quality and all employees involved in operations concerning the process control and the factory production control.

5.1.4 Internal audits and management assessment

The cement manufacturer must conduct an internal audit and a management assessment at least once per year. These assessments must at least include the aspects stated in 4 and 6.1 of NEN-EN 197-2. The management assessment must pay specific attention to the reports on the corrective measures as a result of nonconformity of cement.

5.1.5 Preservation of the cement quality

A description of the measures taken to uphold the quality of the cement for the period during which it comes under the responsibility of the cement manufacturer. This also includes a description of the transport to depots and the procedures used at depots.

5.1.6 Contents of the quality manual

A survey of all valid parts of the quality manual, including the latest revision date. 5.1.7 Product descriptions

A description of all products and the requirements (both internal and external) these products have to meet (Formulation of a quality plan). external = standards or product specifications; internal = target values, limit values (warning and/or action limits).

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5.1.8 Description of the production process - Description of the raw materials to be used, their origin and their test or purchase criteria. - A description of intermediate and semi-manufactured products, including assessment criteria. - A description of the production process from the basic raw materials up to the shipment, with

reference to production procedures and operating instructions for all parts of the process. - A description of the criteria for the process control. - A record of specific production flows dependent on the product. - Measures for preventing undesired mixture of raw materials, semi-manufactured and/or final

products. 5.1.9 Sampling

A sampling schedule for all relevant sub-processes between raw material and final product, including: sampling: where and by whom; - frequency; - properties to be measured and the measurement methods; - internal target values, warning and/or action limits; - reference to assessment procedures, including corrective measures; - recording of measurement results; - reference to procedure(s) for defective products and raw materials.

5.1.10 Measurement and dispensing equipment Registration and calibration of measurement and dispensing equipment. This concerns the weighing and dispensing equipment used in the process as well as the laboratory equipment. The items to be recorded are: - apparatus; - frequency; - by whom; - how; - criteria; - recording the results and the corrective measures.

5.1.11 Registration measurement data Description of the way in which and by whom the obtained measurement results will be registered. Furthermore it has to include (reference to) the way in which it will be demonstrated that the (internal and external) requirements are met. Recording of the responsibility for the reliability of the registered data.

5.1.12 Complaints The cement manufacturer must formulate a procedure for the way in which complaints are dealt with and maintain a complaints file, which must at least state: - the date on which the complaint was submitted; - the particulars regarding the complainant; - the nature of the complaint; - the way in which the complaint was investigated; - the possible internal measures that were taken; - whether or not the complaint was legitimate, plus an explanation; - date on which the complaint was resolved. All correspondence concerning the filing and settlement of the complaint has to be stored with the register.

5.2 Management representative The cement manufacturer has to appoint a management representative, who, irrespective of his other responsibilities, has clearly defined authorities and responsibilities for ensuring that the requirements in NEN-EN 197-2, as described in these regulations, are met. The management representative is responsible for the management of the quality manual, for all documents and data concerning the process control and the autocontrol, and for the testing against these regulations, the requirements in the product standard concerned and, if applicable, to NEN

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3550. The management representative will be responsible for the presence of all required documents at the various locations, the removal of outdated documents and the introduction of new or revised documents.

6. PROCESS CONTROL Sections 6.1 up to and including 6.9 contain regulations concerning the technical equipment for

treating raw materials and the production of cement, as well as for the shipment, transport, transhipment and storage of cement.

6.1 Clinker

Companies manufacturing portland cement clinker have to be equipped in such a way that it allows for production of a homogeneous, well burned clinker with a controllable chemical composition.

6.2 Transport and storage

Raw materials and cement have to be handled in such a way that contamination and/or mixing is prevented. If transport systems are used for the transport of different types of cement, efficient precautions against mixing of these types of cement have to be taken. Raw materials for cement, such as portland cement clinker, blast furnace slag, fly ash, setting time agent, must be stored separately and protected against contamination. Clinker storage has to be protected against precipitation.

6.3 Process inaccuracy The dispensing equipment for raw materials for cement must allow for all raw materials to be

dispensed with a process inaccuracy of ≤3% as compared to the set value. 6.4 Mixing 6.4.1 General

At companies where mixing (see 2.16) is part of the production process, the mixing of weighed dry components has to take place by means of suitable mixing equipment.

The components to be mixed have to be specified in a recipe. The weighing equipment must be authorized and approved by the "Nederlands Meetinstituut B.V."

or by an authorized institute in the country of production. All weighing equipment, plus the corresponding registration equipment must meet the requirements

in NEN-EN 45501 for class IIII weighing equipment. The cement manufacturer is obliged to have the accuracy of all weighing installations examined, at

its own expense, by an expert institute (at the discretion of the certification institute), at least once every two years, and further as often as is considered necessary by the certification institute. After the examination, a declaration of approval has to be submitted to the certification institute.

The weighing equipment has to be set up in such a way that it is possible to verify whether the

weighing containers are fully emptied as much as possible. Not more than 1,0% of the weighed amount may remain behind.

All raw materials must be weighed within in bounds of the calibrated weighing area of the equipment. The weighed amounts have to be registered.

Once per day of production the correct functioning of the weighing equipment has to be checked by

means of an adequate test facility. The results of these checks have to be registered. When automated weighing equipment is used, i.e. equipment in which the weighing process for the

entire mixture is automatically started by a signal in advance and ends automatically when completed, the following applies:

a. Every step of the weighing procedure has to be conducted and registered automatically. b. It must be possible to reproduce the preset recipes in a conveniently arranged way. c. All information presented via the monitor must be conveniently arranged, unambiguous and

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clearly formulated so that the operator can easily understand it. d. It may only be possible to start the manufacture of certain preset recipes when all amounts

of raw materials to be dispensed in accordance with the recipe have automatically become visible on the monitor. It must be possible to display these data throughout the entire weighing process.

Presetting and/or changing recipes is the responsibility of the employee in charge of the quality

care.

Computer steered weighing installations are considered to be automated weighing equipment.

6.4.2 Immediate loading into the means of transport When the final product is not stored in silos but is immediately loaded into the means of transport,

the cement manufacturer has to arrange for the mixing process and the process control to be conducted in such a way that it can be immediately assessed per batch whether the mixing process and the weighing of the components was conducted correctly.

The cement manufacturer must, among other things, formulate procedures for: - control of the mixing time; - control per batch of the dispensed amounts of raw materials; - complete emptying of the mixer if various types of cement are made with the same mixer; - control per batch of the final product based on the determination of a characteristic

property of the final product. This determination has to enable detection of dispensing incorrect amounts and/or incorrect mixing.

6.5 Cement silos If cement is stored in silos, various types of cement (to be distinguished by type and strength class,

recipes and possible specific properties) must be stored separately in silos that have a capacity sufficient to fully store a usual day's production of a cement. All filling pipes and sampling points of every silo for cement to be delivered must be clearly labelled with reference to the type of cement, in accordance with 8 of the standard concerned (6 of NEN-EN 413-1).

6.6 Control room panels The control room panels must show what material is stored in the silos. 6.7 Sampling Every silo or transport system for cement to be delivered must be equipped with a sampling device

in accordance with NEN-EN 196-7, or an other facility that enables random sampling at any and all times.

6.8 Delivery of packaged and unpackaged cement The weighing equipment for both packaged and unpackaged cement has to be provided with a valid

calibration mark, affixed by the Nederlands Meetinstituut (Dutch Calibration Institute) or, in case of production outside the Netherlands, by an institute qualified to that end, all this in conformity with the regulations in the country of production.

6.9 Transport of cement In case of transport as referred to in section 2.12 (closed transport system) it has to be

demonstrated that the closed transport system concerned is equipped and suitable to transport cement protected from environmental influences.

Closed transport systems are also subjected to the regulations stated in appendix B.

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7. FACTORY PRODUCTION CONTROL The factory production control of the cement manufacturer consists of the process control and the

autocontrol. 7.1 Stipulations concerning the process control 7.1.1 Recording the process control system

Every company is responsible for drawing up its own process control system. This process control system must be recorded in de system documentation, among other things with regard to: - the control of raw materials (sampling method and frequency); - process arrangements (way and frequency of sampling); - the production of both certified cement and other products; - corrective measures.

7.1.2 Raw materials

Whether the composition of raw materials meets the requirements originating from the product standards concerned, has to be demonstrated by means of tests conducted by or on behalf of the cement manufacturer. Table 1 summarizes these requirements. The certification institute must be enabled to verify these measurements.

When a major component of cement, as listed in Table 1, is used as a side component, it must meet the requirements as stated for the major component concerned. A test schedule for the assessment of fly ash as a component of cement has been included in 7.1.2.1. which is based on the recommendations in 5.2.4 of NEN-EN 197-1 and/or 5.2 of NEN-EN 413-1. Air-entraining agents used in masonry cement must meet NEN-EN 934-3, supplemented with the requirements regarding air-entraining agents for mortars in NEN 3532. The specific properties and the composition of the raw materials that are used have to be established by means of an adequate entry control. When the raw materials are delivered under certificate, this can be taken into account in the entry control.

7.1.2.1 Test schedule Fly Ash

On behalf of the assessment of the properties, the fly ash to be used either as a major or as a side component in cement must be sampled at regular intervals in time and in supplied quantity of material.

For assessment of the analysis results of the loss-on-ignition of fly ash, a static test will be conducted based on the following criteria:

• fly ash as major component: - 95 % of the observations: loss-on-ignition ≤ 5.0 %; - Acceptable maximum value of the loss-on-ignition: 7.0 %. - Test period: 1 year - Test frequency: 2 / year • fly ash as side component: - 95 % of the observations: loss-on-ignition ≤ 7.0 %; - Acceptable maximum value of the loss-on-ignition: 9.0 %. - Test period: 1 year - Test frequency: 2 / year For the time being these stipulations are based on the application of a simple attributive test,

allowing 1 in every 20 observations to exceed the 95% limit. The maximum acceptable value for the application concerned may not be exceeded. Fly ash with a loss-on-ignition higher than the maximum acceptable value may not be used as major and/or side component.

If fly ash meets the requirements for a major and/or side component and is applied as such, stating

the maximum loss-on-ignition as stipulated in 5.2.4.1 of NEN-EN 197-1 is not necessary.

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Table 1 - Requirements concerning the components of cement and masonry cement

major component Required

portland cement clinker (K) - (CaO)3SiO2 (% m/m) + (CaO)2 SiO2 (% m/m) ≥ 66.7 % (m/m) - CaO/SiO2 ≥ 2.0 (m/m) - MgO ≤ 5.0% (m/m)

granulated blast furnace slag (S) - amorphous phases ≥ 66.7% (m/m) - CaO + MgO + SiO2 ≥ 66.7% (m/m) - (CaO + MgO)/SiO2 ≥ 1.0 (m/m)

natural pozzolans (P) - reactive SiO2 ≥ 25% (m/m)

burnt natural pozzolans (Q) - reactive SiO2 ≥ 25% (m/m)

silicon-containing fly ash (V) - loss-on-ignition ≤ 5.0% (m/m), and/or ≤ 7.0 % (m/m) - reactive CaO < 10.0% (m/m) - free CaO ≤ 1.0 % (m/m), and/or ≤ 2.5 % (m/m) - reactive SiO2 ≥ 25% (m/m)

calcium-containing fly ash (W) - loss-on-ignition ≤ 5.0% (m/m), and/or ≤ 7.0 % (m/m) - reactive CaO ≥ 10.0% (m/m) - if reactive CaO ≤ 15 % : reactive SiO2 ≥ 25 % (m/m) - if reactive CaO > 15 % : DS28 ≥ 10.0 MPa - expansion ≤ 10 mm

burnt slate (T) - DS28 ≥ 25 N/mm2 - expansion < 10 mm

lime stone (L and LL) when applied > 5% (m/m)

- CaCO3 ≥ 75% (m/m) - clay content ≤ 1.20 g/100 g - total amount of organic material: LL : ≤ 0.20% (m/m) L : ≤ 0.50% (m/m)

micro silica (D) - loss-on-ignition ≤ 4 % (m/m) - BET ≥ 15.0 m2/g

cement - alle relevant requirements in NEN-EN 197-1 (including amendments), NEN-EN 197-2, NEN-EN 197-4, NEN-EN 14216, NEN-EN 413-1

additives - meet NEN-EN 934-3 and NEN 3532 - less than 0.5 % @(concerning dry material)

building lime - all relevant requirements in NEN-EN 459-1

If fly ash meets the criteria for a side component but is applied as a major component, stating the maximum loss-on-ignition as stipulated in 5.2.4.1 of NEN-EN 197-1 is obligatory.

7.1.3 Assessment of the suitability of mixing recipes For the completion of an application for certification of an uncertified type of cement, the cement

manufacturer must first demonstrate that mixing in accordance with the recipe results in a cement that meets the requirements in 4.1. The cement has to be tested for all properties that are obligatory in this respect according to the product standard concerned and, if applicable, according to NEN 3550. The assessment of the obtained results will be conducted as described in 9.2 of the product standard concerned (7.2 of NEN-EN 413-1). In this assessment the kA-values stated in Table 6 of these standards (Table 7 of NEN-EN 413-1) may be extended with the kA-values stated in Appendix G of this regulation.

The recipe and the results of the tests carried out by the manufacturer have to be reported to the certification institute in order to obtain a certificate that is valid for a period of four months.

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When a recipe has not been used for a period longer than one month, it has to be demonstrated, with a frequency of at least once per month, that mixing according to the recipe renders a cement that meets the relevant demands in the product standards concerned. The results of these assessments must be reported to the certification institute.

7.2 Storage period of the process control results The cement manufacturer has to store the results of the process control for a minimum period of 2

years. This storage period must be recorded in the system documents. 7.3 Stipulations concerning the process control

Every company is responsible for conducting its own autocontrol. The schedule for the autocontrol must be formulated in agreement with Table 4 of the product standards concerned (Table 5 of NEN 413-1) and, if applicable, Table 1 of NEN 3550 and is described in more detail in 7.4.1 up to and including 7.4.6. This concerns all certified types of cement.

7.3.1 Recording the autocontrol

The autocontrol system must be recorded in the quality manual, among other things with regard to: - the organization of the autocontrol; - the reports to the certification institute, both regarding the standard control period and regarding

important individual deviations; - corrective actions.

7.4 Sampling and testing 7.4.1 General

The sampling points must be clearly labelled with the type of cement as recorded in Chapter 8 of the product standard concerned (Chapter 6 of NEN-EN 413-1). The samples to be tested are spot samples. The cement samples taken in the scope of the autocontrol must be taken as close as possible to the point of shipment.

7.4.2 Sampling and testing of cement, either packaged or in bulk, shipped from silos.

The minimum frequency of sampling and testing is stated in Table 4 column 4 of the product standard concerned (Table 5 of NEN-EN 413-1). A higher frequency is valid for the control period. This is stated in column 5 of this Table (control period).

For cement with a high sulphate resistance in accordance to NEN 3550 the minimum frequency for sampling and testing has been recorded in Table 1 of NEN 3550.

7.4.3 Sampling and testing when the final product is not stored in silos When the cement is not stored in silos but is immediately loaded into the means of transport, the

sections 7.4.5 up to and including 7.5 are not applicable. Per type of cement at least one sample must be taken per day of production, which must be tested

for the relevant properties stated in 7 of the product standard concerned (5 of NEN-EN 413-1) and, if applicable, 5 van NEN 3550. When a type of cement is produced for more than one day per month, one measurement per month will suffice with regard to the loss on ignition, the insoluble residue, the sulphate content, the chloride content, the pozzolanicity, and the content of comprising components.

7.4.4 Measures in case of nonconformity with de product requirements

A cement can fail to meet the product requirements in two ways, namely: The result of the static test during the control period. The result of one single measurement value of a sample of the autocontrol is outside the limits for simple measurements.

7.4.4.1 Measures in case of nonconformity of de static tests

Subsequent to obtaining the last results of a control period the cement manufacturer himself conducts the assessment as intended in 9.2.2 of the product standard concerned (7.2.2 of NEN-EN 413-1). The results and the assessment are sent to the certification institute. If the assessment shows an excess of the limit values, the cement manufacturer must examine the cause, take corrective measures and inform the certification institute.

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7.4.4.2 Measures in case of nonconformity of individual results When a type of cement does not meet the limit values as recorded in Table 8 of the product standard concerned (or Table 9 of NEN-EN 413-1) and, if applicable, Table 1 of NEN 3550, the cement manufacturer must prevent shipment of the batch in question. When the batch has already been shipped he must immediately inform the customers and confirm the information in writing. Subsequently the cement manufacturer must find the reason for the nonconformity of the cement and take corrective measures. The cement manufacturer has to inform the certification institute when cement was shipped that did not meet the relevant requirements. The cause as well as the corrective measures have to be recorded. The certification institute is entitled to review the reports concerned.

If the corrective measures have proven to be effective the certification institute may grant permission to omit the result(s) of the autocontrol(s) as tested against the product standard concerned and, if applicable, NEN 3550, from the statistic assessment of the control period.

If the cement manufacturer fails to inform the certification institute of an exceeding of the limit values of the individual results, this will be regarded as a nonconformity of the cement in the control period concerned.

7.4.5 Incidental production but regular shipment of cement This article concerns types of cement that are shipped regularly but in quantities that are so small that

the cement is only incidentally produced, so that the samples taken from the silo constantly pertain to the same batch of cement. Then, in mutual consultation between the cement manufacturer and the certification institute, the sampling and testing frequency on behalf of the autocontrol to determine the initial binding and the strength can be reduced to once a week.

7.4.6 Incidental production and batch shipment Incidentally produced, certified types of cement that are produced and shipped in batch, and are

consequently not continuously available for shipping, must be sampled at regular intervals during shipment. At least one sample will be taken per day of shipping.

The cement has to be tested for all properties that are obligatory according to the product standard concerned and/or according to NEN 3550. Assessment of the obtained results will be conducted as described in 9.2 of NEN-EN 197-1 (7.2 of NEN-EN 413-1). In this assessment the kA-values may be extended with the kA-values stated in Appendix G of this regulation.

The number of samples has to be sufficiently large to enable evaluation of the results. (see also 4.3.1 of NEN-EN 197-2)

7.5 Production stop If a company expects that the production and shipping of a certified cement will be stopped for a

period longer than one month, this must be immediately reported to the certification institute. The cement manufacturer has to stop the autocontrol and the certification institute must stop the external control (in accordance with section 10.2) until they are notified that the production of the cement has been resumed. The certification institute has to be immediately informed when the production of this cement has been resumed. At that point in time both the internal and the external control will be restarted.

When a cement has not been produced for a period longer than one year, the certificate expires. 7.6 Additional stipulations

Determination of the composition Determination of the content of comprising components dependent on the type of cement: fly ash cement: ENV 196-4;

others: A method based on the determination of the chemical composition of raw materials and cement, approved by the certification institute. Alternative methods can be applied in consultation with the certification institute when the suitability of these methods has been demonstrated.

Other measurement methods Where allowed in the NEN-EN 196 series, other methods may be used provided it is demonstrated that the results obtained are equivalent.

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8. LABORATORY 8.1 Laboratory facilities On behalf of the factory production control the cement manufacturer must have a company

laboratory facility where all tests that are applicable and described in the product standards concerned, can be conducted in the prescribed manner.

The cement manufacturer must have a laboratory facility suitable to conduct the tests in the scope of the process control.

8.2 Maintenance and management system In the scope of the process control and the factory production control the cement manufacturer must

set up and maintain a maintenance and management system including a set control frequency. The results of these controls must be recorded.

Table 2 shows an example of a record of obligatory inspections and the equipment used. Appendix C specifies the minimum control frequency for a number of measurements.

Table 2 - Example of a maintenance and management schedule

equipment control parameters control method control frequency Conducted by . . . . . . . . XRF metal straight edge automated vicat . . . . . . . . .

. . . .

. . . . standard wear reliability . . . . . . . .

. . . .

. . . . internal procedure visual compare to EN 196-3 . . . . . . . .

. . . .

. . . . daily Once every month Once every month . . . . . . . .

. . . .

. . . . lab. employees lab. employees lab. employees . . . . . . . .

8.3 Calibration tests by cement manufacturers and verification laboratories As part of the calibration of measuring equipment and methods the cement manufacturer has to

take part in round-robin tests carried out by manufacturers of cement and verification laboratories as described in appendix A.

If a company outside the Netherlands already takes part in a round-robin test in its own country, the certification institute must assess the equivalence of this test and the reference test described in appendix A .

Equivalence means that the test concerned, as compared to the test described in appendix A, renders equal insight into:

- shifts in measurement level within the laboratory concerned; - shifts in standard deviation within the laboratory concerned (extent of measurement

accuracy); - systematic differences between various laboratories. When the test concerned is found to be equivalent, a link between this test and the Dutch reference

test will have to be established. This has to be realized by having at least one participant, who is a (potential) holder of the Dutch certificate, take part in both tests.

Moreover, all results of the test concerned have to be reported to the certification institute. 9. TRAINING All laboratory employees must have had a suitable training that meets the requirements recorded in

the quality system and that was completed by a theoretical as well as a practical test. The employee responsible for the quality care must at least be trained at Higher Vocational

Education level. 10. EXTERNAL INSPECTIONS The cement manufacturer has to fully cooperate with the certification institute and enable it to carry

out the tasks described below. Representatives of the certification institute have access to the factory and the sampling points of the expedition silos at any and all times.

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10.1 Admission test The general procedures with regard to the admission test are described in the General Regulations

on Certification. This description includes the assessment of the cement factory (the initial audit), the approval and issue of certificates, appeal when approval is denied and appeal when approval is granted.

This section states regulations concerning the admission test that are supplementary to the General Regulations on Certification of the certification institute. The admission test will be started after receipt of a written application.

10.1.1 Supply of information by by the cement manufacturer The cement manufacturer must grant the certification institute access to the quality system as well

as to the installations with which the cement is manufactured. 10.1.2 Initial audit of a cement factory A team of the certification institute will assess the cement manufacturer and the quality system on

the basis of the requirements described in this assessment guideline. During the initial audit samples of cement will be taken and offered for testing to both the verification laboratory and the company laboratory. The test results of the company laboratory and the verification laboratory have to be equivalent and have to be within the limit values for the type of cement concerned as stated in the product standard concerned and in NEN 3550. CEN report CR 14245 gives guidelines for the assessment of differences.

If a cement manufacturer already has a KOMO certificate for one or more types of cement and

applies for certification of a new type of cement, the certification institute will determine whether supplementary inspection of equipment and/or the company laboratory and the quality system is required.

10.1.3 Issue of a certificate valid for a period of four months When it has been demonstrated that the requirements in this assessment guideline and the General

Regulations on Certification are met, a certificate will be issued that is valid for a period of four months. The control period begins immediately after the issue of this certificate, or as much earlier as possible.

10.2 Control period During the three months control period the cement manufacturer must conduct autocontrol in

accordance with the stipulations in these regulations. The minimum frequency for sampling and testing are given in the product standard concerned and, if applicable, in column 5 of Table 1 of NEN 3550.

During the control period the certification institute will take three samples of the cement to be certified. These samples will be tested both by the cement manufacturer and by an independent (verification) laboratory. The test results of the company laboratory and the verification laboratory have to be in agreement with each other and with the results of the autocontrol. The test results of both the company laboratory and the verification laboratory have to be within the limit values for the type of cement concerned as stated in the product standard concerned and, if applicable, in NEN 3550 or as stated by the cement manufacturer.

The test results of the autocontrol obtained during the control period will be tested against the criteria in the product standard concerned and, if applicable, against the additional product requirements included in this assessment guideline or stated by the cement manufacturer.

If a cement manufacturer has already been producing a type of cement for a reasonable period of time prior to the application for the KOMO certificate and consequently has a sufficient amount of test results available to conduct an equivalent assessment, this assessment will be made instead of the control period.

10.3 Issue of a certificate When evaluation of the control period shows that the requirements and stipulations in these

regulations and in the General Regulations on Certification are met, a certificate will be issued for the current year. The validity of the certificate will be automatically extended for a period of one year if the results of the autocontrol and the inspection of the company by the certification institute

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consistently demonstrate that the requirements are met. A certificate always applies to one type of cement only. Figure 1 shows the chronological course of events from the initial audit up to the issue of the (definitive) certificate.

10.4 External inspections subsequent to the issue of the certificate The external inspection of the cement manufacturer and the produced cement will be conducted in

the form of audits, inspection visits, assessment of the results of the factory production control and investigation of the samples taken by or on behalf of the certification institute. On the one hand the objective of the latter is to verify the measurement results and methods of the cement manufacturer, and on the other hand it is meant to control the cement properties. Figure 1 - step-by-step procedure

step 1 step 2 step 3 step 4 step 5 step 6 step 7 control period month 1 month 2 month 3

month 4

1st sample 2nd sample

3rd sample

initial audit + sampling

when satisfactory: Issue of a certificate valid for a period of 4 months, start control period

autocontrol

when satisfactory: Issue definitive certificate

10.4.1 Audits and inspection visits Once a year an audit of the quality system, announced in advance, will be conducted as referred to

in 5.2.2 of NEN-EN 197-2. Twice a year unannounced inspection visits will be paid to the factory during which it will be checked

whether, among other things, the following aspects meet with the sections concerned in these regulations:

- the process control; - the factory production control; - laboratory; - the process control. 10.4.2 Assessment of the results of the autocontrol

Four times per year the measurement results of the autocontrol obtained during the previous 12 months (masonry cement: two times per year over 24 months) will be tested against the requirements in the product standard concerned and, if applicable, against NEN 3550, in the way described in the product standard concerned. The raw materials and the composition of the cement (components on the basis of 9.3 of the product standards concerned and/or 7.2 of NEN-EN 413-1) will also be involved in this assessment is as far is this has been agreed upon (see 7.1.2). The cement manufacturer will submit the data for this assessment and in as far as possible also the tests as such, to the certification institute in a convenient survey, all this in a manner agreed upon with the certification institute. The tests, as described in Appendix A of NEN-EN 197-2, will also be conducted by the certification institute twice per year. These tests will be conducted when the results of the autocontrol have been received (and assessed).

10.4.3 Verification investigation 10.4.3.1 Sampling

Samples of every type of certified cement will be taken unannounced six times per year by or on behalf of the certification institute. These samples will be tested both by the company laboratory and by a verification laboratory. The samples will be taken under supervision of the certification institute and as close to the point of shipment as possible. Sampling has to be conducted in agreement with NEN-EN 196-7. Every sample must be split up in three sub-samples, two of which will be sealed by or on behalf of the

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certification institute. One of the sealed samples is sent to the verification laboratory. The second sealed sample must be stored by the cement manufacturer for a period of 3 months, or at least until the results of both laboratories have become available and the assessment has been completed. The unsealed sample will be used for the investigations in the company laboratory. The way of sampling cement that is immediately loaded from the mixer into the means of transport will be arranged case by case in mutual agreement by the certification institute and the company.

10.4.3.2 Testing

Both the company laboratory and the verification laboratory investigate one of the sub-samples. The sampling and testing frequency is specified in the product standard concerned and shown in Table 3. The certification institute must compare the results of the verification laboratory with those of the company laboratory and with the results of the autocontrol by the cement manufacturer in accordance with Appendix A of NEN-EN 197-2. If any deviations or irregularities are found, the cement manufacturer will be informed. Table 3 - Verification investigation. Sampling and testing frequency

determination sampling

initial binding soundness compressive strength Cl- content SO3 content air content 1 ) water retention 1) loss-on-ignition 1) insoluble residue 1) pozzolanicity 1)

once every two months

Al2O3 content and C3A 1) twice per year

components 1)

heat of hydration 1)

1) If a requirement is applicable for the cement concerned.

10.4.4 Changes in the description of the properties of certified cement If a cement manufacturer changes the specification of the properties of a certified cement within the

limits of the standard, the current certificate will be withdrawn and a new certificate, valid for a period of four months, will be issued. Based on:

- Sampling and testing by the verification laboratory (3 samples per month for a period of 3 months) and

- assessment of the data from the factory production control of the cement manufacturer over a period of three months (usual sampling and testing frequency)

the certification institute has to investigate whether the changed product meets the requirements in the product standard concerned and, if applicable, of NEN 3550 and/or the additional product requirements in accordance with 4.2 of this assessment guideline. If these requirements are met a definitive certificate will be issued (see 9.3).

10.4.5 Requirements regarding the auditor / inspector

In order to be qualified as an independent auditor/inspector, the auditor/inspector of the certification institute must: - have completed a training at the higher technical education level (HTS), preferably in process

technology or chemical technology; - be an expert in cement chemistry;

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- have demonstrable experience in the field of cement investigation; - have completed a training in the assessment of quality systems; - have taken part in at least three audits/inspections of a qualified auditor/inspector.

11. QUALITY REGISTRATION The certificate holder is responsible for the registration of the results of the autocontrol. Registration

has to be organized in such a way that the certification institute can examine these results at any and all times and can verify the origin.

The cement manufacturer must test the results of the control period against the assessment criteria stated in the product standard concerned and, if applicable, against NEN 3550 four times per year(masonry cement: twice per year) .

If the cement is not stored in a silo but is immediately loaded into a means of transport and less

observations are available than stated in Table 6 of the product standard concerned (Table 7 of NEN-EN 413-1), the assessment must still be conducted in the manner described in 9.2 of the product standard concerned (7.2 of NEN-EN 413-1) in which the kA-values may be extended with the kA-values stated in Appendix G of this assessment guideline.

The results of the autocontrol and the tests conducted by the cement manufacturer will be sent to

the certification institute immediately after they have become available. In case of a (salutatory) change in the product properties within the limit values of the standard, the

various data populations can be tested separately. The cement manufacturer has to store the results of the factory production control for a period of at

least 10 years. 12. OTHER OBLIGATIONS OF THE CEMENT MANUFACTURER 12.1 Changes in technical equipment, quality system and product properties Fundamental changes in technical equipment, quality system and employees (such as the

management representative or the functionaries responsible for quality and production), have to be reported to the certification institute within one month. When considered necessary by the certification institute the changes will be subjected to inspection.

Important changes in product properties, nonconfromity to the product standard concerned (with the

exception of the requirements concerning the upper limit for compressive strength after 28 days of curing) or to NEN 3550 or the other additional requirements specified by the cement manufacturer or the expectation that conformity will not be obtained in the short term, have to be immediately reported to the certification institute.

The cement manufacturer has to notify the certification institute when he produces cement that does

not come under the certification regulations. The cement manufacturer will inform the certification institute on the way this type of cement is designated on delivery documents and packaging material.

12.2 Transport documents The cement manufacturer will ensure that the transport documents of certified cement, and when

the cement is packaged also the packaging material, will bear the certification marks and a designation of the type of cement as described in the certificate.

Moreover, every delivery document will state: - the name of the manufacturer or the trade mark; - the customer; - delivery under certificate ex works or on site. When a CEM III cement contains more chloride than 0.10% m/m, the delivery document must state

the maximum chloride content (NEN-EN 197-1 Table 3).

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If fly ash is used as side component and the fly ash meets 7.1.2.1 of this assessment guideline stating the maximum loss-on-ignition, as referred to in 5.2.4.1 van NEN-EN 197-1, is not necessary.

12.3 Cement origin A certificate is issued in the name of the company that produces the cement or in the name of the

dispatching centre, stating the name of the cement manufacturer. Cement manufacturers and intermediaries are allowed to package the cement in packaging material

bearing the name of someone else. 13. DEPOTS AND DISPATCHING CENTRES Regulations concerning depots and dispatching centres are included in appendix D. 14. DOCUMENTS This article includes a survey of the standards and other documents mentioned in this assessment

guideline. The year mentioned always concerns the date of issue or the date of the most recent supplementation or change in the document concerned.

standard description NEN 3550:2006 Types of cement conforming to NEN-EN 197-1, NEN-EN

197-4 or NEN-EN 14216 with additional special properties - Definitions and requirements

NEN-EN 196-1:2005 Methods of testing cement Part 1: Determination of strength

NEN-EN 196-2:2005

Methods of testing cement Part 2: Chemical analysis of cement

NEN-EN 196-3:2005 Methods of testing cement Part 3: Determination of setting times and soundness

ENV 196-4:1993 Methods of testing cement. Part 4: Quantitative determination of constituents

NEN-EN 196-5:2005 Methods of testing cement Part 5: Pozzolanicity test for pozzolanic cement

NEN-EN 196-6: 1993 Methods of testing cement Part 6: Determination of fineness

NEN-EN 196-7:1993 Methods of testing cement Part 7: Methods of taking and preparing samples of cement

NEN-EN 196-8:2003

Methods of testing cement Part 8: Heat of hydration –Solution method

NEN-EN 196-9:2003 Methods of testing cement

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standard description Part 9: Heat of hydration –Semi-adiabatic method

NEN-EN 197-1:2000 Cement –Part 1: Composition, specification and conformity criteria for ordinary types of cement including a list of changes A1, June 2004

NEN-EN 197-2:2000 Cement – Part 2: Conformity evaluation

NEN-EN 197-4:2004 Cement - Part 4: Composition, specification and conformity criteria for types of blast furnace cement with a low initial strength

NEN-EN 413-1:2004 Masonry cement - Part 1: Composition, specification and conformity criteria

NEN-EN 413-2:2005

Masonry cement - Part 2: Test methods

NEN-EN 459-1:2001 Building lime - Part 1: Composition, specification and conformity criteria

NEN-EN 14216:2004 Cement - Composition, specifications and conformity criteria for special types of cement with very low heat of hydration

NEN-EN-ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories

NEN-EN 45501:1996 Metrological aspects of non-automatic weighing equipment

CR 14245:2001

Guidelines for the application of EN 197-2 ”Conformity Evaluation”

Building Order 2005 Building Order 2003 Stb. (Gazette) 2001, 410; Stb. 2002, 203, 516, 518, 582 and Stb. 2005, 1, (368), 417 and 528; Stb 2006 dated 21-03 and 257 and the Ministerial order Stcrt. (government gazette). 2002, 241; Stcrt. 2003, 101 and Stcrt. 2005, 163.

NEN-EN 934-3: 2004 Admixtures for concrete, mortar and grout - Part 3: Admixtures for masonry mortar - Definitions, requirements, conformity, marking and labelling

NEN 3532:1995 Admixtures for mortar and concrete. Definitions, requirements and assessment

NEN 6720:1995 Regulations for concrete - TGB 1990 Structural requirements and calculation methods (VBC 1995) including a list of changes A3:2004

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Appendix A Supplementary tests A.1 BASIS The most important characteristic of cement quality is the standard strength. This property is

determined in accordance with the current standards by subjecting a standardized mortar to a standardized procedure.

The strength development of such a mortar depends on a large number of factors. The most

important factor is the quality of the tested cement. All other factors can be characterized as test circumstances.

International practice shows that test circumstances are an important factor for the final

measurement results, also when the standard requirements are accurately applied. It is therefore important to keep the measurement level as constant as possible and, moreover, to minimize the systematic differences between the various laboratories involved in the assessment. For this reason the tests mentioned in the articles 2 and 3 below have to be conducted.

A.2 ANALYSIS OF WEAR AND TEAR OF THE PLATENS OF THE COMPRESSION TEST MACHINE An important source of gradual but sometimes also sudden changes in level, is wear of the platens

of the compression test machine. To signal undesirable wear, the compressive strength determined with the jig in use has to be regularly compared to the compressive strength determined with a reference jig specially intended for this purpose.

It is allowed to use an alternative method, provided the results are equal to the method mentioned above. All this in the opinion of the certification institute.

The exact way in which the platens are tested for wear must be recorded in the quality manual. A.3 REFERENCE TESTS A.3.1 Preparation To signal all other changes in the measurement level, the investigations as described in NEN-EN

197-1, such as the compressive strength determination, the determination of the specific surface (Blaine), the determination of the SO3-content, the setting time, etc. must regularly be conducted on the same type of reference cement. These tests not only serve the purpose of monitoring the level in one laboratory, but also that of establishing systematic differences between the various laboratories involved in the assessment of cement.

In consultation with a supervisory committee, appointed to that end by the Board of Experts, one

type of cement is chosen to be used as reference cement. The sub-samples of the reference cement are obtained by homogenizing an amount of cement once a year, divide this amount in smaller portions and pack these portions in a suitable way. The institute or laboratory responsible for packaging and shipment subsequently distributes the required number of samples, taken randomly from the lot, to the laboratories involved.

The number of samples shipped per laboratory suffices for 12 to 13 months of testing with the usual frequency for the laboratory concerned. After 12 months a new cement sample is selected for the reference tests. During at least 6 tests both the new and the old reference cement have to be tested simultaneously for strength, Blaine and sulphate content. The measurements will be conducted in the manner usually applied by the laboratory concerned and the measurement results must correspond with the measurement results obtained with the methods stated in the test standards in 14 of this assessment guideline.

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3.2 Realization Survey of the measurements to be conducted by the participating laboratories: Frequency at least 1x per week: • compressive strength after 2, 7 and 28 days of curing • weight and density of a prism. • sulphate content (as SO3) • specific surface (Blaine)1) Frequency at least 1x per month: • the water requirement for normal consistency • initial setting time • final setting time 1) • soundness (Le Chatelier) • Na2 O and K2O 1)

• chloride content • loss-on-ignition • insoluble The laboratories for which the measurement concerned is relevant, are invited to conduct the

measurement below with a frequency of 1x per three months. • heat of hydration

1) In as far as it is relevant to the laboratory concerned.

The results obtained from the reference cement will be evaluated subsequent to each determination. Visual changes in the measurement level require an adequate reaction, i.e. investigation of the causes and implementation of corrective measures. The results have to be processed statistically every month. For each property a monthly average and a corresponding standard deviation will be calculated.

All determinations must be conducted in the manner usually applied by the laboratory. If the reference cement deviates from the cement usually manufactured by the cement manufacturer and consequently the measurement method used is not suitable for the reference cement, the measurement concerned may be omitted. Example: determination of the sulphate content by means of XRF and suitable calibration curves for the reference cement are not available.

The certification institute records the details for conducting the investigation and for the way of

reporting to the certification institute in a procedure and sends this procedure to all participants in the investigation.

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Appendix B Regulations regarding the quality control pertaining to the shipment and transport of cement in bulk by means of closed systems in vehicles and vessels, bearing a certificate that is valid up to the receiving station of the customer (as described in section 2.12)

The stipulations below, regarding the transport of certified cement, apply to the shipment of cement from the factory, from a depot, and from a dispatching centre provided the dispatching centre is qualified to use the certification mark assigned to the cement manufacturer (see also appendix D). In the stipulations below, the word shipper is understood to refer to:

-in case of loading at the cement manufacturer: the cement manufacturer; -in case of loading at a depot: the holder of the depot; -in case of loading at a dispatching centre: the holder of the dispatching centre.

a. The means of transport also include ancillary appendages made available by the transporter, such

as the equipment for loading and unloading. b. When reporting for loading the transporter must produce evidence of the product that was last

transported. c. If the transporter last transported the same cement that is about to be loaded, he will unconditionally

be granted permission by the shipper to take on the load. d. If the transporter last transported another product than he is expected to start loading upon his

reporting for loading, the shipper will check whether the last loaded product and the cement to be loaded tolerate each other, using a list issued by or in consultation with the cement manufacturer.

e. If the check referred to under d, shows that the products do not tolerate each other, the transporter

will only be granted permission to load when he has demonstrated that the means of transport to be used is clean.

f. If the check as referred to under d, shows that the products do tolerate each other, the shipper must

check to what extent the actual dead weight of the means of transport deviates from its registered dead weight. For this purpose the shipper must maintain a list of weights of the relevant means of transport.

g. If the deviation as referred to under f is smaller than or equal to 3%, the shipper will grant

permission to load. h. If the deviation as referred to under f is more than 3%, the shipper will only grant permission to load

when either the means of transport was demonstrated to be clean or when other measures were taken to reduce the deviation as referred to under f to a value smaller than or equal to 3%.

i. The obligations of the transporter under the terms of this appendix have to be recorded in a written

agreement between the shipper and either the transporter or his client.

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Appendix C Schedule for inspection and maintenance of laboratory equipment

equipment control parameters control method control frequency control realization laboratory space and climate rooms

temperature relative humidity

thermometer hygrometer

1 x per day 1 x per day

laboratory employees idem

water baths temperature thermometer 1 x per day laboratory employees

rapid weighers and scales horizontal position zero position preventive maintenance

levelling rod visual -

1 x per day when used 1 x per year

laboratory employees idem supplier

compression test machine measuring range zero position pressure speed wear of platens correct operation centring the accessory

visual visual stopwatch appendix A, sub 2 calibration reference cement visual

prior to use when used 1 x per three months appendix A, sub 2 1 x per year each day the machine is used

laboratory employees idem idem idem an institute approved by the certification institute approved institute laboratory employees laboratory employees

vibrating table vibration width when loaded horizontal position

vibration width meter levelling rod

1 x per week 1 x per week

laboratory employees idem

moulds internal measures vibration stability exterior lightly oiled exterior welds fully @sealed

calipers visual idem idem

1 x per month when used idem idem

laboratory employees idem idem idem

mixers suitable mixing arm arm - bowl distance wear mixing arm

preventive maintenance visual measurement measurement

- when used 1 x per month

1 x per year 1 x per month

supplier laboratory employees Idem idem

aerometer calibration correct measurement value 1 x per month laboratory employees

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Appendix D Assessment of a depot or dispatching centre for certified cement in relation to the use of the certification mark

D.1 INTRODUCTION

Cement is certified up to the moment of delivery, that is the moment of loading into the means of transport of a third party or the moment of unloading the cement manufacturer's own means of transport at the buyer's.

If a certified cement is transported from the factory to the eventual user via a depot or dispatching centre (intermediate storage) that is not located at the factory, this cement can no longer be considered certified when it has been unloaded into the silo. Because of possible contamination of the means of transport, the presence of residues of other types of cement in the silos, or errors during the transhipment, the certification institute can no longer make a statement about the quality of the cement.

This appendix to the assessment guideline Cement for the assessment of depots and dispatching

centres for certified cement includes the rules and regulations used to assess whether a certified cement can still be considered as such after transhipment so that the supplier concerned obtains the right to apply the certification mark issued to the cement manufacturer.

D.2 RIGHTS AND OBLIGATIONS

The intermediary has the right to use the certification mark issued to the manufacturer if he can demonstrate the origin of the cement and if he can demonstrate that the properties of the cement he received have not changed during transport, receipt, storage, packaging, and shipping. Sections D4, D5, D6 and D7 of this Appendix to the Assessment Guideline Cement include the procedures and the conditions. After a written request by the holder of the depot or the intermediary, the certification institute determines by means of an initial audit whether the depot or dispatching centre complies with the requirements in this Appendix. The certification institute issues a declaration stating whether the depot of the dispatching centre may use the certification mark concerned. The use of the certification mark for cement originating from a depot or dispatching centre is only allowed when the initial audit has shown that the requirements are fulfilled and when an agreement with the certification institute, stating the reciprocal rights and obligations, has been concluded. When a depot or dispatching centre does not comply (any longer) with the obligations in this Appendix to the Assessment Guideline Cement, the right to use the certification mark for cement originating from the depot or shipping centre will expire. In that case the cement concerned will be designated as not-certified.

D.3 QUALITY SYSTEM

The quality control and the obligations originating from this Appendix to the Assessment Guideline Cement must be entered in a recorded quality system. For the depot this is the quality system of the cement manufacturer. The relevant elements regarding the depot must be both available and operational at the depot. The manager of the dispatching centre must set up and maintain a quality system as described in NEN-EN 197-2. The quality manual and/or the quality procedures have to at least include the following: - An organization chart indicating the arrangements that have been made regarding purchase,

receipt (internal) transport, packaging, storage, control and delivery, including the responsibilities and competences of the functionaries responsible for the quality control. Assignment of a management representative for the management of the quality system.

- (Quality) specifications recorded per type of cement (including or including reference to procedures recorded in writing), sampling and testing frequencies, investigation methodology, target values, limit values, corrective measures.

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- Obligations resulting from the use of the certification mark for the types of cement being stored and/or transhipped;

- Procedures for the control of the contents of the means of transport; - Registration of complaints The transport from the factory to the depot is considered to be a form of internal transport, for which the cement manufacturer is fully responsible. Measures to prevent contamination or degradation of the cement quality have to be recorded in the quality system of the cement manufacturer. All this in the opinion of the certification institute. The transport from the factory to the dispatching centre is a form of transport for which the manager of the dispatching centre is responsible, unless agreed otherwise in a contract between the cement manufacturer and the management of the dispatching centre. Measures to prevent contamination or degradation of the cement quality during transport have to be recorded in the quality system of the dispatching centre. All this in the opinion of the certification institute.

D.4 DEMANDS CONCERNING THE PROCESS CONTROL

The requirements mentioned in this article particularly concern measures to prevent the mixing or contamination of different types of cement. It is allowed to use alternative operational procedures with regard to the requirements concerning the process execution as stated below, provided the holder of the depot or dispatching centre has demonstrated to the certification institute that the alternatives are equivalent to the requirements described below. Every cement, distinguished according to cement manufacturer and designation on the certificate (type and class of cement and special properties) must be assigned a separate silo. If a silo is to be used for the storage of another type of cement, it has to be empty. A procedure for this must be included in the quality manual. Inlet pipes into the silos must be secured in such a way that unwanted mixing of different types of cement because of connection faults is prevented. The way in which unwanted mixing is prevented must be recorded in a procedure that is demonstrably followed. It must be impossible to simultaneously transfer different types of cement from various silos to one shipping point.

If a weighing bunker is used, it must be emptied prior to the shipment of a new type of cement. This must be made clear by a read-out of the residual weight of the contents of the weighing bunker. The weighing system of the weighing bunker must bear a valid calibration mark affixed by an authorized institute. If a weighing bridge for loading tankers is used, the weighing bridge must bear a valid calibration mark affixed by an authorized institute. If cement is packaged at the depot or dispatching centre, the weighing installation for the packaged cement must bear a valid calibration mark affixed by an authorized institute.

D.5 DEMANDS CONCERNING THE PRODUCT CONTROL

In order to demonstrate that the properties of the cement have not changed as result of transport, transhipment, storage, and packaging, the tests described below have to be conducted. Sampling for autocontrol of the cement, both at the depot and at the dispatching centre, must take place from cement that is about to be shipped. The laboratory used by the depot or dispatching centre must comply with the stipulations in Chapter 7 of this assessment guideline.

D.5.1 Depot

Samples in the scope of the autocontrol of the cement manufacturer and the verification investigation by the certification institute will have to be taken both at the factory and at the depot. The number of

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samples to be taken for the autocontrol at the factory and in the depot must reflect the relative quantities of the cement concerned that are shipped via the depot and via other shipment directly from from the production site.

The minimum number of samples taken at the depot is: - Autocontrol: 1x per 14 days - Certification institute: 1x per year (see also D.5.1.1)

If the supply frequency is so low that samples are constantly taken from the same batch of cement, the cement manufacturer, in consultation with the certification institute, may use a lower sampling frequency. All this in agreement with the stipulations in section 7.4.5.

The investigation of samples taken during the unloading of supplied cement will be conducted in accordance with the rules included in the quality system of the cement manufacturer. The frequency depends on the possibility that the transport will cause a loss of quality.

D.5.1.1 Inspections at the depot by the certification institute

The certification institute will inspect the functioning of the depot two times per year. During the inspection visits the tests conducted by the depot and the functioning of the quality system of the depot will also be assessed. Dependent on the relation in which a type of cement is shipped via the depot or directly from the factory the certification institute will take verification samples. These verification samples will be assessed together with the samples taken at the factory in accordance with the method described in Appendix A of NEN-EN 197-2.

D.5.2 Dispatching centre

Cement supplied to a dispatching centre has to be subjected to identification tests. This obligation is cancelled when the cement is supplied with a certificate that includes transport to the customer.

D.5.2.1 Identification tests

The required number of identification tests per delivery amounts to 1 per 500 tons of cement with a minimum of 1 per delivery. The procedure for identification purposes (for example determination of the fineness, the loss on ignition or colour, or the sealing of the means of transport or an equivalent operational procedure) must be recorded in the quality manual, all this in the opinion of the certification institute.

D.5.2.2 Confirmation autocontrol

The confirmation autocontrol (autocontrol at the dispatching centre) will be conducted for the purpose of validating the results of the autocontrol of the cement manufacturer. Sampling and testing on behalf of the autocontrol must at least correspond to the data in table D.1. Tests will be conducted on the basis of the principles recorded in the product standard concerned (possibly extended with the kA-values stated in Appendix G of this assessment guideline.

D.5.2.3 Verification investigation by the certification institute

The frequency of sampling and testing by the certification institute is shown in table D.1. The results of the tests have to correspond with the results obtained by the intermediary from tests of the same samples, taking into account the inaccuracies of the methodology. Evaluation takes place on the basis of the principles recorded in the product standard concerned.

D.5.2.4 Inspections by the certification institute at the dispatching centre

The certification institute will inspect the functioning of the dispatching centre in the manner described in 10.4.1.

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D.6 REQUIREMENTS CONCERNING THE ADMINISTRATION

The dispatching centre and the depot have to maintain a well-organized administration of the type and the quantity of all types of cement received and shipped, all this in the opinion of the certification institute. The test results and primary measurement data must be adequately recorded. The results of the autocontrol will be reported quarterly to the certification institute, preferably in the form of a computer list.

Table D.1 Tests and test frequency

minimum test frequency

by the dispatching centre

property type of cement

and/or

strength class

methodology1)

cement in storage

transhipped cement

by the certification institute

strength after

- 2 days

- 7 days

- 28 days

all, except 32.5

32.5

all

NEN-EN 196-1

NEN-EN 196-1

NEN-EN 196-1

1 x per week

1 x per week

1 x per week

1 x per delivery and at least 1 x per 500 tons

6 x per year

initial binding all NEN-EN 196-3 1 x per week

loss-on-ignition CEM I and CEM III NEN-EN 196-2 1 x per week

insoluble CEM I and CEM III NEN-EN 196-2 1 x per week

pozzolanicity CEM IV NEN-EN 196-5 2 x per month

air content masonry cement NEN-EN 413-2 1 x per week

water retention masonry cement NEN-EN 413-2 1 x per month

1) Where allowed in the NEN-EN 196 series, other methods may be used provided it is demonstrated that the results obtained are equivalent.

D.7 AGREEMENT CONCERNING THE USE OF THE CERTIFICATION MARK

The holder of the dispatching centre has to conclude an agreement with the certification institute stating the obligations regarding the use of the certification mark for cement originating from the dispatching centre. At the conclusion of the agreement with the holder of the dispatching centre, the conditions included in the General Regulations on Certification of the certification institute also become effective. A separate certification agreement for the depot is not required. The agreement with the certificate holder is also valid for the depot. However, the certificate holder is obliged to inform the certification institute that the cement with the corresponding certification mark will be shipped via a depot, thus enabling the certification institute to conduct any required local inspections.

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Appendix E Certification on the basis of product specifications formulated by the cement manufacturer.

E.1 INTRODUCTION During the certification of cement it is investigated whether the requirements stated in standards and

corresponding rules and regulations are met. In addition to these requirements, product specifications formulated by the cement manufacturer that fall within the requirements of the product standard concerned, can also be used as assessment criteria for the cement produced by the cement manufacturer. This appendix indicates the requirements to be met by the product specifications for the purpose of certification.

E.2 CONTENTS PRODUCT SPECIFICATION The product specification may include one or more of the following aspects: a. Composition and properties as described in the cement standard(s). b. Properties not included in the cement standard(s). E.3 PROCEDURE The cement manufacturer describes in the product specification which additional properties shall be

tested by the certification institute. It must be clear what methodologies will be used to determine the properties and which limit value(s) will be applied. If required a verification investigation may be part of the activities of the certification institute.

E.4 EXTERNAL INSPECTIONS If a cement manufacturer wants the product specification to be included in the assessments (his

own as well as the assessments of the certification institute) this subject must be included in the inspection visits of the certification institute. The tests based on the product specification(s) must also be conducted during the test period of a new type of cement.

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Appendix F Assessment of the product information supplied by the cement manufacturer. F.1 INTRODUCTION The quality of the product information supplied by the cement manufacturer may be part of the

certification procedure. This appendix includes the requirements and the assessment criteria for the product information supplied by the cement manufacturer.

F.2 CONTENTS PRODUCT INFORMATION The product information may include one or more of the following aspects: a. A general description of properties and application. b. Valid certificates and corresponding standards. c. Composition and properties as described in the cement standard(s). d. Properties not included in the cement standard(s). e. Methods of delivering cement F.3 PROCEDURE The cement manufacturer must record how the product information came into being. It must be

clear what methodologies are used to determine the properties and on which information the values are based. If data regarding spread or band widths are included in the product information, the origin of these data must be recorded. The basis data and/or values originate from the factory production control. These must be recorded as described in 11. QUALITY REGISTRATION of this assessment guideline.

The frequency at which the product information is assessed and made up-to-date must be

indicated. The procedure is integrated in the quality system of the cement manufacturer and is included in the

quality manual. The procedure and the product information are available to the customers. F.4 EXTERNAL INSPECTIONS If a cement manufacturer wants the product information as referred to in this Appendix to be

included in the assessments (his own as well as the assessments of the certification institute) this subject must also be included in the control visits of the certification institute. The quality of the product information must also be verified during the test period of a new type of cement.

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Appendix G Additional kA-values Depending on the number of observations, the product standards concerned include the k-values (acceptability constant kA) that are used to conduct a test in accordance with the requirements in the standard. The table below includes additional values in case the number of observations is 3 up to and including 19.

kA when Pk = 5 % when Pk = 10 %

number of test results n

(standard strength and initial strength, lower limit)

(other properties)

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

7.66 5.15 4.20 3.71 3.40 3.19 3.03 2.91 2.82 2.74 2.67 2.61 2.57 2.52 2.49 2.45 2.42

6.16 4.16 3.41 3.01 2.76 2.58 2.45 2.35 2.26 2.21 2.16 2.11 2.07 2.03 2.00 1.97 1.95

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Appendix H Example of the text of a KOMO® product certificate for cement

KOMO® product certificate semifinished

number issued valid to replaces

: : : :

CEMENT Description and standard Additional properties

Manufacturer: Name Postal address

Manufacturing location:

[Supplier :]

Declaration of the certification institute: This product certificate has been issued on the basis of BRL 2601 by [certification institute], in conformity with the [certification institute] Regulations on product certification. [certification institute] declares that it is confident that the cement produced by the cement manufacturer and mentioned in this certificate consistently meets the specifications recorded in this product certificate at the moment of delivery, provided the product carries the KOMO® -seal in the way indicated in this product certificate. [certification institute] declares that the cement in its applications under the conditions stated above, meets the applicable requirements in the Building Order. For acknowledgement by the Ministry of Housing, Spatial planning and the Environment (VROM), please refer to the "Survey of acknowledged quality declarations in the construction industry" as this appears on the web site of the Stichting Bouwkwaliteit (SBK) www.bouwkwaliteit.nl

CERTIFICATION INSTITUTE

Signature

Users of this product certificate are advised to ask [certification institute] whether this document is still valid.

® is a collective make of the Stichting Bouwkwaliteit

What has been assessed: Quality system Product Periodical inspection

Building decree Bears CE

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http://www.bouwkwaliteit.nl/


38

Building Order: For the relation between the statements in this product certificate and the regulations in the Building Order, please refer to the "Survey of quality declarations in the construction industry" as published by the Stichting Bouwkwaliteit (SBK) in Rijswijk.

Building Order entry:

Dept. Subject limit state/determination method Performance in accordance with the quality declaration

Explanation/conditions

2.1 General strength of the structure

Ultimate limit state, calculated in accordance with NEN 6720

Meets NEN-EN 197-1, 197-4, 14216, 413-1 and/or NEN 3550

None

Technical specifications: The cement meets: - - [The air content of masonry cement may not deviate more than 2 % of the value stated by the cement manufacturer.]

Certification seal: The certification seal depicted here, with dimensions of at least 15x15mm, must be visible on the delivery documents of certified cement. Moreover, every delivery document will state: - the factory name or the trade name - the buyer - type of cement and strength class - way of delivery (transport included / excluded) - [maximum chloride content of blast furnace cement (if > 0,10%)] Suggestions for the customer 1. Upon delivery, inspect to see whether:

1.1 the product is accompanied by a delivery form; 1.2 the product information on the delivery form corresponds with what has been ordered; 1.3 the product and/or the delivery document bears the marks as indicated in this certificate; 1.4 the product, possibly as a result of transport, has any visible defects; 1.5 the product meets the approval criteria in the standards mentioned under "specifications" that may be valid for the delivery

concerned.

2. If a delivery is rejected on the basis of the stipulations in 1, please contact: 2.1 the supplier and/or the cement manufacturer whose address is stated on the first page of this certificate, and, if required, 2.2 the office of the certification institute

Survey of possible depots

KOMO.

Normative for the construction industry

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