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Revised paragraphs are marked in the right margin Page 1 of 1

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Copyright©Saudi Aramco 2010. All rights reserved.

Materials System Specification

09-SAMSS-097 19 December 2010

Ready-Mixed Portland Cement Concrete

Document Responsibility: Civil Standards Committee

Saudi Aramco DeskTop Standards

Table of Contents

I Scope............................................................. 2

II Conflicts and Deviations................................. 2

III References..................................................... 2

IV Modifications to ASTM C94 - 09..................... 4

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 2 of 2

I Scope

This Specification covers ready-mixed structural and non-structural concrete

manufactured and delivered to Purchaser in a freshly mixed and unhardened state from

Saudi Aramco approved suppliers. Requirements for quality of concrete shall be either

as hereinafter specified or as specified in the Purchase Order. This Specification does

not cover the placement, consolidation, curing or protection of the concrete after

delivery to the Purchaser.

II Conflicts and Deviations

A. Any conflicts between this specification and other applicable Saudi Aramco

Materials System Specifications (SAMSSs), Engineering Standards (SAESs),

Standard Drawings (SASDs), or industry standards, codes, and forms shall be

resolved in writing by the Company or Buyer Representative through the

Manager, Consulting Services Department of Saudi Aramco, Dhahran.

B. Direct all requests to deviate from this specification in writing to the Company or

Buyer Representative, who shall follow internal company procedure SAEP-302

and forward such requests to the Manager, Consulting Services Department of

Saudi Aramco, Dhahran.

III References

The selection of material and equipment, and the design, construction, maintenance, and

repair of equipment and facilities covered by this specification shall comply with the

latest edition of the references listed below, unless otherwise noted.

A. Saudi Aramco References

Saudi Aramco Engineering Procedures

SAEP-302 Instructions for Obtaining a Waiver of a

Mandatory Saudi Aramco Engineering

Requirement

SAEP-1152 Approval Procedure for Ready-Mixed Concrete

Mix Design

Saudi Aramco Materials System Specification

09-SAMSS-088 Aggregates for Concrete

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 3 of 3

B. Industry Codes and Standards

American Concrete Institute

ACI 207.3R Practices for Evaluation of Concrete in existing

Massive Structures for Service Conditions

ACI 211.1 Standard Practice for Selecting Proportions for

Normal, Heavy weight, and Mass Concrete

ACI 318M Building Code Requirements for Structural

Concrete and Commentary

American Society for Testing and Materials

ASTM C39 Standard Test Method for Compressive Strength of

Cylindrical Concrete Specimens

ASTM C94 - 09 Standard Specification for Ready-Mixed Concrete

ASTM C150 Standard Specification for Portland Cement

ASTM C494 Standard Specification for Chemical Admixtures

for Concrete

ASTM C618 Standard Specification for Coal Fly Ash and Raw

or Calcined Natural Pozzolan for Use in

Concrete

ASTM C1152 Standard Test Method for Acid-Soluble Chloride

in Mortar and Concrete

ASTM C1240 Standard Specification for Silica Fume Used in

Cementitious Mixtures

ASTM C1218 Standard Test Method Water-Soluble Chloride in

Mortar and Concrete

ASTM C618 Specification for Coal Fly Ash and Raw or

Calcined Natural Pozzolan for Use in Concrete

British Standard

BS 1881 - 124 Methods for Analysis of Hardened Concrete

BS EN 450 - 1 Fly Ash for Concrete

C. Saudi Arabian Standards Organization

SASO SSA 143 Portland Cement, Ordinary and Rapid-Hardening

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 4 of 4

IV Modifications to ASTM C94 - 09

The following paragraph numbers refer to ASTM C94 - 09, which is part of this

specification. The text in each paragraph below is an addition, exception, modification,

or deletion to ASTM C94 - 09 as noted. Paragraph numbers not appearing in

ASTM C94 - 09 are new paragraphs to be inserted in numerical order.

5 (Addition) Purchaser reserves the right to obtain samples of the delivered

product and its constituent components, which Purchaser deems necessary to

verify full compliance with the quality requirements stated in this

Specification.

5.2.1, (Deletion) Delete these paragraphs in its entirety.

5.2.2 & 5.2.3

5.2.1 (Addition) The type of cement used shall be specified in the Purchase Order

and shall be a Purchaser-approved brand.

Ordinary Portland Cement (Type I) shall be in accordance with SSA 143 and

the optional chemical requirements of ASTM C150, Table 2.

Type V sulfate resistant Portland cement shall be in accordance with

ASTM C150, including the optional chemical requirements of Table 2 and

the optional physical requirements of Table 4.

Silica fume shall be in accordance with ASTM C1240. Silica fume, when

used as a mineral additive, it shall not be less than 7% by weight of cement

as replacement and it shall not exceed 10% by weight of cement.

Natural Pozzolans can be used as partial replacement of cement. The amount

of the Natural Pozzolan (ASTM C618) used as cement replacement shall be

established based on the compressive strength requirements but shall not

exceed 50% replacement for the cement.

Mill test certificates shall be provided for each shipment of cement.

Under no circumstances shall the source of cement be changed without prior

written approval of Purchaser.

5.3 (Deletion) Delete this paragraph in its entirety.

5.3 (Addition) Aggregate shall conform to 09-SAMSS-088 “Aggregates for

Concrete.”

5.4 (Deletion) Delete this paragraph in its entirety.

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 5 of 5

5.4 (Addition) Mixing water shall be free from oils, acids, organic matter or

other deleterious substances and shall satisfy the requirements listed in

Table B of this standard. No changes in water source shall be permitted

without prior approval by Purchaser.

Table B – Acceptance Criteria for Mixing Water

Test Frequency of Test Max. Min.

TDS Weekly 500 ppm N/A

pH Weekly 8.0 6.0

5.6 (Addition) High range water reducers (Superplasticizers) type F or G only,

conforming to ASTM C494, can be used, when necessary to achieve and

maintain the desired workability.

Calcium chloride or admixtures containing chloride salts are not permitted

and shall not be used.

Admixture manufacturers technical data sheet, including dosage range for

slump/temperature range, and storage requirements shall be submitted to the

Purchaser with proposed mix designs.

6.1 (Addition) The maximum water soluble chloride ions in concrete shall not

exceed 0.15% for reinforced concrete and 0.06% for prestressed concrete by

weight of cement. The maximum Sulfate ions as SO3 shall not exceed 4%.

Tests shall be in accordance with ASTM C1218, BS 1881 – 124 or

equivalent.

6.1.4 (Exception) Option C shall be used as a basis for determining the

proportions of the concrete to produce the required quality.

6.4.1 (Addition) The proportions of ingredients shall be selected in accordance

with provisions of ACI 211.1. The cement content and the water cement

ratio (W/C) for structural & non-structural concrete shall be as indicated in

Table A of this standard.

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 6 of 6

Table A – Cement Content and W/C Ratio for Concrete

Item Structural Concrete Non-structural Concrete

Cement Content Kilogram/Cubic Meter (Kg/M

3)

Max. 370

Min. 350

Max. -

Min. 250

W/C Ratio 0.4 - 0.6 -

28-Days Design Compressive Strength (ASTM C39)

- 4000 psi (28 MPA)

- 2000 psi (14 MPA)

Precast & Prestressed Concrete & Water

Retaining Structures

Cement Content Kilogram/Cubic Meter (Kg/M

3)

No Max. Min. 370

W/C Ratio 0.4 -

28-Days Design Compressive Strength (ASTM C39)

- 5000 psi (35 MPa)

Silica Fume shall be tested prior to use and on monthly basis or when changing the source of the materials to confirm its compliance to ASTM C1240.

Ultra fine fly ash (type S in accordance with BS EN 450 - 1) can be used in lieu of Silica Fume provided that:

The minimum cement replacement is 10% and the maximum is 15% (in lieu of 7 and 10% for silica fume)

The maximum water /cement ratio is 0.35 in lieu of 0.4

Amount retained when wet-sieved on sieve no. 325 (0.045 micron meter) is less than 3.5% Maximum particle size is less than 5 microns

Ultra fine fly ash shall be tested prior to use and on monthly basis or when changing the source of the materials to confirm its compliance to BS EN 450 - 1.

Commentary Note:

This table covers cast in place and prestressed/precast concrete. However, for water retaining structure, precast/prestressed concrete, cement content more than 370 Kg/M

3 of concrete can be used in the mix, and the minimum

28-Days Design Compressive Strength shall be 5000 psi (35 MPa).

6.4.2 (Addition) Complete concrete mix design data shall be submitted to the

Purchaser for approval at least 30 days prior to proposed use. Concrete mix

design shall be reviewed and approved by each project Inspection Section as

per the procedures specified in SAEP-1152.

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 7 of 7

7.1 (Addition) Concrete slump shall be based on project specifications.

Tolerances in slump stated in ASTM C94 - 09 are based on normal mixes,

without superplasticizing admixture. Concrete shall have a maximum slump

of 200 mm at the point of delivery after the admixture is added unless

otherwise specified. The slump variation within the 90 minutes after

introduction of the mixing water to the cement shall be within 50 mm from the

slump measured for the full-scale plant trial result of the specified concrete

mix design.

7.2 (Addition) When concrete pumps are used, the slump shall be determined at

the discharge point of the concrete placement hose.

9 (Exception) Volume batching shall not be allowed.

9.3 (Exception) Wash water shall not be used as mixing water.

10.3 (Addition) Plant scales shall be calibrated no less than three times a year

and shall be certified as conforming to ASTM C94 - 09 by Saudi Aramco

approved calibration agency.

11.1.2 (Addition) Concrete delivered in trucks not having operable revolution

counters shall be rejected.

12 (Addition) No aluminum parts shall be placed in contact with concrete

during mixing or delivery.

12 (Addition) In remote areas, where, it is proven and verified by SAPMT and

Inspection Department the absence of a batch plant that is in full

compliance with this standard, existing batch plant will be allowed with the

following conditions:

a) The final product shall satisfy the requirements of this standard.

b) Quality control shall be maintained at the batch plant and the

construction site. Saudi Aramco Approved Independent laboratory

shall be utilized to perform the required tests when there are no

laboratory facilities at the batch plant.

c) The batch plant shall be in full Compliance with section 9 of this

standard.

12 (Exception) Addition of water or admixtures (re-tempering) shall not be

allowed..

12.1.2 (Deletion) Delete this paragraph in its entirety.

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 8 of 8

12.4 (Deletion) Delete this paragraph in its entirety.

12.5 (Addition) Truck-Mixing with operable revolution counters will be

allowed for dry batching (where cement and aggregates are pre batched in a

batch plant, water and liquid admixtures shall be added at site).

12.5.2 Truck mixing is allowed if the discharge of the concrete cannot be achieved

within 90 minutes after introduction of the mixing water to the cement and

aggregates or before the drum of the truck has revolved 300 revolutions,

provided that:

a) The discharge of the concrete shall be completed within three hours or

before the drum of the truck has revolved 600 revolutions, whichever

comes first after introduction of the cement to the aggregates.

b) Each truck delivering concrete shall have an operable water system

with an accurate water measuring device of one of the following types:

Automatic cut off siphon type.

Water meter of the automatic shut off type.

Sight gage.

c) The final concrete shall satisfy the requirements of this standard.

d) Consistency and uniformity tests are performed as per the requirements

of ASTM C94 - 09. Tests shall be witnessed by representative from

Inspection Department.

e) Quality control is maintained at both batch plant and at project site.

f) Inspection Department shall approve mixing procedure to ensure

compliance with Saudi Aramco applicable standard.

12.9 (Deletion) Delete this paragraph in its entirety.

12.9 (Addition) Concrete delivered at a temperature in excess of 32°C or that

fails to maintain a temperature of 32°C until used, shall be rejected and

replaced at the expense of the Manufacturer.

Commentary Note:

Non-structural concrete with compressive strength of 2000 psi is exempted from the above requirement. The reason for this exemption is due to the fact that non-structural concrete is unreinforced and thus cracking is not critical.

14.1 (Addition)

a) Location of Batch Plant

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 9 of 9

b) Job Order (JO) Number for Project

c) Time Leaving Batch Plant

14.1.10 (Deletion) Delete this paragraph in its entirety.

18.2 (Addition) The minimum required number of concrete test cylinders for

strength tests shall be:

Age (Days) No. of Cylinders

3 1

7 1

28 2

18.3 (Addition) The test report shall include the following data for each test

sample of concrete taken at the placement site:

Name of Project and Job Order (JO) for the Project

Slump in millimeters

Ambient air temperature in ºC

Concrete temperature in ºC

% Air, when air entrainment is used.

19.1 (Exception) Delete this paragraph in its entirety

19.1 (Exception) In the event that concrete fails to meet the strength

requirements of this Specification, in-place testing for concrete strength will

be conducted by Purchaser. In-place testing will be conducted in accordance

with ACI 318M, Chapter 5 and ACI 207.3R, Chapter 3, or ACI 318M,

Chapter 20 at the sole option of the Purchaser.

Concrete in the area represented by the in-place tests shall be considered

structurally adequate provided such results conform to the provisions of

ACI 318M.

The results of all in-place testing, as described above, conducted by

Purchaser and observed by the Manufacturer, shall be considered binding

and final upon the Manufacturer.

Tests for Saudi Aramco acceptance purposes shall be performed by a Saudi

Aramco-approved independent laboratory.

Concrete judged structurally inadequate after in-place testing described

above, shall be removed and replaced at the expense of the Manufacturer.

Document Responsibility: Civil Standards Committee 09-SAMSS-097

Issue Date: 19 December 2010

Next Planned Update: 24 March 2014 Ready-Mixed Portland Cement Concrete

Page 10 of 10

Revision Summary 24 March 2009 Major revision. 19 December 2010 Minor revision.