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है”ह”ह

IS 1077 (1992): Common Burnt Clay Building Bricks-Specification [CED 30: Clay and Stabilized Soil Productsfor Construction]

IS 1077 : 1992( Reaffirmed 2002)

jrj/<rf}4 SI/..,cr; REAFFIRMED

2007~~ ttr~ l:JCtT~ ttr lit ttr~

(qiilCfI~ )

Indian Standard

COMMON BURNT CLAY BUILDINGBRICKS - SPECIFICATION

( Fifth Revision )

Fourth Reprint JANUARY 2005

UDC 666.762.712

© BIS 1992

B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 SHAH ZAFAR MARG

NEW DELHI 110002

January 1992 Price Group 2

BAHADUR

AMENDMENT NO.1 MAY 2008TO

IS 1077 : 1992 COMMON BURNT CLAY BUILDINGBRICKS - SPECIFICATION

( Fifth Revision)

(Page 3, clause 7.1.1, fourth line) - Insert 'by more than 15 percent' after'class of brick' .

(CED 30)

Rcprography Unit, BISt New Delhi, India

Clay Products for Buildings Sectional Committee, CED 30

FOREWORD

This Indian Standard (Fifth Revision) \\'8S adopted by the Bureau of Indian Standards, after thedraft finalized by the Clay Products for Buildings Sectional Committee had been approved by theCivil Engineering Division Council.

The common building bricks is not only one of the oldest but also the most extensively usedbuilding material in construction work. It is essentially a local building material and consequentlythere exist considerable variations in the quality of raw material. the process of manufacture andthe quality of the finished product. Rapid building activity, to be on rational lines, needs a certaindegree of uniformity in the construction materials. Standardization of the common building brickwith regard to its quality and dimensions would substanitally help in raising the quality ofconstruction work and its speed.

Keeping in view the advantages of modular co-ordination. Indian standards specify thedimensions of standard bricks in 100 mm module as the basis of all dimensional standardiz­ation in regard to building components. This is also in confirmity with the decision ofGovernment of India to adopt metric system in the country. Considering the various issuesregarding the manufacturing and other practices followed in the country, the Sectional Committeeresponsible for the preparation of this standard had specified modular size of the brick. Advantagesthat a modular brick has over traditional brick are many, such as:

i) requires less drying area;

ii) saving in space of floor area;

iii) economy in cost of brick masonry;

iv) saving in labour cost;

v) less losses during handling, etc; and

vi) less consumption of mortar.

However. it was brought to the notice of committee that there was sufficient demand for sizes othetthan modular sizes and that the manufacturers were meeting such demands at present. This hadled to a situation where bricks satisfying other requirements of the standard, but not the requirementsregarding dimensions we-re classified as not satisfying the requirements of the standard. Therefore,the committee reviewed the relevant clause of Indian Standards and decided to include the non­modular size of the brick in addition to the modular size specified in the standard at present.This relaxation will be for a period of four years from the publication of this standard and. it isintended that the manufacturers and consumer organization can gradually switch over with theperiod to the modular sizes, which are the preferred sizes.

For the purpose of deciding whether a particular requirement of this standard is complied with,the final value, observed or calculated, expressing the result of a test or analysis, shall be roundedoff in accordance with IS 2 : 1960 'Rules for rounding off numerical values i revised)', The numberof significant places retained in the rounded off value should be the same as that of the specifiedvalue in this standard.

IS 1077: 1992

Indian Standard

COMMON BURNT CLAY BUILDING.BRICKS - SPECIFICATION

( Fifth Revision)

1 SCOPE

1.1 This standard Jays down requirements forclassification, general quality, dimensions andphysical requirements of common burnt claybuilding bricks used in buildings.

NOTE - Burnt clay bricks having compressivestrength less than 40 N/nlln2 ( approx 400 kgf/c1111

)

are covered in this standard and for higher strength,see IS 2180 : 1988.

5.2 Hand-moulded bricks of 90 mm or 70 111111

height shall be moulded with a frog 10 to 20 mrndeep on one of its flat sides; the shape and sizeof the frog shall conform to either Fig. IA or Fig.1B (see 6.1.1 for L, Wand II). Bricks of 40 mrnheight as well as those made by extrusion processmay not be provided with frogs.

5.3 The bricks shall have smooth rectangularfaces with sharp corners and shall be uniform incolour.

2 REFERENCES 6 DIMENSIONS AND l'OLERANCES

6.1 Dimensions

wuu« ( J,V)n101

9090

2.1 The Indian Standards listed in Annex A arenecessary adjuncts to this standard.

3 TERMINOI.JOGY

3.1 For the purpose of this standard, thedefinitions as given in IS 2248 : 1992 shall apply.

6.1.1 The standard modularbuilding bricks shall be asand 1B):

Length ( L)mm190190

size of commonfollows (Fig. I A

Height ( H)mm

9040

4 CLASSIFICATION

4.1 The common burnt clay bricks shall beclassified on the basis of average compressivestrength as given in Table 1.

6.1.2 The following non-modular sizes of thebricks may also be used (f....ig. 1A and I B ):

Length (L) Ulidt" (~V) Height (II)mm mm mrn230 110 70230 110 30

5 GENERAL QUALifY

Table t Classes of Common Burnt Clay Bricks( Clause 4. t )

5.1 Bricks shall be hand-moulded or machine­moulded and shall be made from suitable soils.They shall be free from cracks and flaws andnodules of free lime.

Average Compressive Strengthnot Less Than

N/1l1n11 ( kgf/cm" )(upprox )

Height (//).mm

70 ~ lengthbrick

6.1.2.1 For obtaining proper bond arrangementand modular dimensions for the brick work, withthe non-modular sizes, the following si/es of thebricks may also be used:

Length (L) wuu« (~J')

mm nun70 J 10

6.2 Tolerances

The dimensions of bricks when tested in accor­dance with 6.2.1 shall be within the followinglimits per 20 bricks:

a) For modular sizel..ength 3 720 to 3 880 nun ( 3 gOO.:1: 80 mrn )Width 1 760 to 1 840 n1(11 ( I ROO J_40 nun )Height 1 760 to I 840 mm ( 18">0:1: 40 1111n )

( For 90 111ln high bricks)760to 840nlln( 800i.40Inm)

( For 40 111ln high bricks)b) For non-modular size

Length 4 520 to 4 680 mm ( 4600 ±_ HO mm )Width 2240 to 2 160 tum (2200J:40 InITI)Height I 440 to 1 3601l1nl ( 1400±40 rnm )

( For 70 mrn high bricks )640 to SoO rnm ( 600±40 min)

( For 30 nun high bricks)

( 350)

(300 )

( 250 )

( 200)

( I~5 )( 150 )

( J25 )( 100)

( 75 )( 50 )

( 35 )

35'0

30'0

25'0

20'0

17'5

J5'O12'510'07'S5'0

3'5

3530

25

20

17'~

J512'510

7'S5

3'5

ClassDesignation

IS 1077 : 1992

R 20

~--- ...---- l

lA 18

All dimensions in millimetres.

FIG. 1 SHAPE AND SIZE OF FROGS IN BRICKS

2A MEASUREMENT OF LENGTH

.........--..'-'--- - - - - - - - -

28 MEASUReMENT OF WIDTH

~--::l"'---""'- - - - - - - - - ...,....~...--~

_----40_~ -- --......_......._wr

f&-----..~--F-- - - - - _.- - - -#----....,....-wr

2C MEASUREMENT OF HEIGHT

Fro, 2 MEASlJREMENT OF TOlERAl\CES OF COMMON BUILDING BRICKS

6.2.1 Twenty ( or more according to the size ofstack) whole bricks shall be selected at randomfrom the sample selected under 8. All blisters,loose particles of clay and small projections shallbe removed. The y shall then be arranged upon alevel surface successively as indicated in Fig. 2A,28 and 2C in contact with each other and in astraight line. The overall length of the assembledbricks shall be measured with a steel tape orother suitable incxtensiblc 111CaSUre sufficientlylong to measure the whole row at one stretch.Measurement by repeated application of shortrule or measure shall not be permitted. If. forany reason it is found impracticable to measure

bricks in one row, the sample may be divided intorows of 10 bricks each which shall be measuredseparately to the nearest millimetre. All thesedimensions shall 'be added together.

7 PHYSICAL REQUIREMENTS

7.1 Compressive Strength

The bricks, when tested in accordance with theprocedure laid down in IS 3495 (Part I ) : 1992shall have a minimum average compressivestrength for various classes as given. in 4.1.

2

7.1.1 The compressive strength of any individualbrick tested shall not fall below the minimumcompressive strength specified for the correspond­ing class of brick. The lot shall be then checkedfor next lower class of brick.

7.1 Water Absorption

The bricks, when tested in accordance with theprocedure laid dO\\11l in IS 3495 ( Part 2) : 1992after immersion in cold water for 24 hours,water absorption shall not be more than 20percent by weight up to class 12'5 and 15 percentby weight for higher classes.

7.3 Efflorescence

IS 1077: 1992

the rating of efflorescence shall not be morethan 'moderate' up to class 12·5 and 'slight' forhigher classes.

8 SAMPLING AND CRITERION FORCONFORMITY

8.1 Sampling and criterion for conformity ofcommon bricks shall be done in accordance withthe procedure laid down in IS 5454 : 1978.

9 MARKING

9.1 Each brick shall be marked (in the frogwhere provided) with an indication of source ofmanufacture.

The bricks when tested in accordance with the 9.1.1 The manufacturer may also use theprocedure laid down in IS 3495 ( Part 3 ) : 1992 Standard Mark.

ANNEX A( Clause 2.1 )

LIST OF REFERRED INDIAN STANDARDS

IS No.

2180 : 1988

2248 : 1992

3495( Pa rt 1 ) : 1992

Title

Specification for heavy-dutyburnt clay building bricks( second revision)Glossary of terms relating tostructural clay products forbuildings ( second revision )

Methods of tests of burnt claybuilding bricks: Part I Deter­mination of compressivestrength (third revision )

3

IS No.

3495( Part 2 ): 1992

3495( Part 3 ) : 1992

5454 : 1978

Title

Methods of tests of burnt claybuilding bricks: Part 2 Deter­mination of water absorption( third revision)

Methods of tests of burnt claybuilding bricks: Part 3 Deter­mination of efllorescence( third revision)

Methods for sampling of claybuild ing bricks (first revision )

Bureau of Indian Standards

81S is a statutory institution established under the Bureau of Indian Standards ~A1 ct, 1986 to promoteharmonious development of the activities of standardization. marking and quality certification of goodsand attending to connected matters in the country.

(~otJyri~ht

[~I S has the copyright of all its publications. No part of these publications may be reproduced in anyIorm without the prior permission in writing of BIS. This docs not preclude the free usc, in course ofimplementing the standard, of necessary details, such as symbols and sizes. type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications) .. SIS.

Review of Indian Standards

Amendments arc issued to standards as the need arises on the basis of comments. Standards arc alsoreviewed periodically: a standard along with amendments is reaffirmed when such review indicates thatno changes arc needed; if the review indicates that changes are needed, it is taken up for revision. Usersof Indian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of 'BIS Catalogue' and' Standards: Monthly Additions'.

This Indian Standard has been developed from Doc: No CED 30 ( 4978 )

Amendments Issued Since Publication

-----~-...._--Amendment No.

-----._..~--_.

Date of Issue

BUREAU OF INDIAN STANDARDS

Text Affected

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