Is for Laterite

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Whereas the Parliament of India has set out to provide a practical regime of right to

information for citizens to secure access to information under the control of public authorities,in order to promote transparency and accountability in the working of every public authority,

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IS: 3620-1979Indian Standard

SPECIFICATION FORLATERITE STONE BLOCK FOR MASONRY

( First RevisionFirst Reprint JANUARY 19139

LDC 691.21-433.:693,1

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC3

NEW DELHI 110002

Gr 2 May 1980

( Reaffirmed 2003 )


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ISr9620-1979I ndian St andard

SPECIFICATION FORLATERITE STONE BLOCK FOR MASONRY( Fi rst Rev i si on

Stones Sectional Committee, BIN2 6Chairman

SRRI B. RAMACHANDRA~Members

RepresentingGeological Survey of India

SFIRI S. R. PRADHAN Alternate toShri B. Ramachandran )SRRI K. K. AQRAWALA Builders Association of India, BombaySHRI K. K. MAD~OK ( Alternate)SEMI S. K. BANWJ EE National Test House. CalcuttaSHRI P. R. DAS ( Alternate )SHRI R. K. BANSALSERI J . K . CHARAN Delhi Marble Dealers Association, New DelhiEngineer-in-Chiefs Branch (Ministry ofDefence )CHIEF ARCI~ITECTCHIEF ENGINEER ( B & R )

SHRI K. KAMLANATRAN ( Alternate )Central Public Works Department, New DelhiPublic Works Department. Government ofRajasthan, J aiphr Department of Geology & Mining, Governmentof Rajasthan, UdaipurSHRI Y. N. DAVESHRI R. G. GIJPTA ( Alfernate )DEPUTY DIRECTOB ( RESEARCH Public Works Department, Government of UttarPradesh, LucknowDR M. P. DHIR Cenrgraload Research Institute ( CSI R ), New

DR N. B. LAL ( Alternate)DIBECTOR ( CSMRS )DEPUTY DIRECTOR ( CSMRS )( Alternate )Central Water Commission, New Delhi

SHRI M. K. GUPTADR ICJBALALI Himalayan Tiles and Marble Pvt Ltd, BombayEngineering Research Laboratories, Governmentof Andhra Pradesh, Hyderabad\SRRI G. RA~AKHI SHNA Alternate )Continued on page 2 )

0 Cobvright 1980BUREAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright Act \ XI V of 1957 ) andreproduction in whole or in part by any means except with written perm:ssion of thepublisher shall be deemed to be an infringement of copyright under the said Act.


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IS:3620- 1979( Continuedfrom pap

MembersSWR R. C. J AIN

1)Representing

Ministry of Shipping & Transport ( Roads Wing),New DelhiSHRI R. G. LI IK AYEDR G. S. MEHROTRA Indian Institute of Technology, BombayCentrRtiorF ;;ldmg Research Instttute ( CSIR ),

DR DINESIX CHANDRA (A lernale )SHRI PREM SWARVP Department of Geology b Mining, Governmentof Uttar Pradesh, LucknowSHRI A. K . A~ARWAL (Alternate )DR A. V. R. RAO National Buildings Organisation, New DelhiSHEI J . SEN GUPTA ( Aflernnte )RESEARCH OFFICER ( ME R I ), I rrigation & Power Department, Government ofNASIK Maharashtra, BombayRESEARCH OFFICER ( GERI ) Public Works Department, Government ofGujarat, Vadodara

SUPERINTENDINO E N Q I N E E R Public Works & Electricity Department, Govern-S~ %%%I NG

ment of Karnataka, BangaloreE N Q I N E E R Public Works Department, Government of Tamil( DESIGNS ) Nadu, MadrasDEPUTY CHIEF NCINEER ( I & D )( Al t ernate )SUPE~INTENDINO EN Q I N E E R( PLAXNINQ CIBCL ~ ) Public Works Department, Government of WestBengal, CalcuttaSEEI D. AJ ITHA SIMHA, Director General, IS1 (Ex-t$icio M ember jDirector ( Civ Engg )

SecretarySHBI S. SENMJPTA

Assistant Director ( Civ Engg ), IS1


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IS :362e- 979I ndian St andard

SPECIFICATION FORLATERITE STONE BLOCK FOR MASONRY( Fi rst Rev i si on

0. FOREWORD0.1 This Indian Standard First Revision ) was adopted by the IndianStandards Institution on 17 December 1979, after the draft finalixedby the Stones Sectional Committee had been approved by the CivilEngineering Division Council.0.2 The laterites occur in Andhra Pradesh, Bihar, Kerala, Tamil Nadu,Maharashtra, Karnataka, Assam, Goa, Meghalaya and Orissa and ismainly used as building blocks for construction of masonry in building.The term laterite stone has been applied generally to a group of rocks,which occur as surficial blankets. It is the residual weathering produrtsof certain rocks containing silicates, such as basalt, granite and slate.0.3 The physical properties of this stone vary cosiderably from place toplace. Freshly quarried laterite is soft and porous but when exposed toatmospheric conditions it hardens and makes a very tough material.Therefore, it is always desirable that these stones should be quarriedsufficiently ahead of use. But the laterke stone of certain minimumrequirements in strength, etc, is only suitable for masonry constructionand therefore, a careful selection in the procurement of this stone isnecessary before use. This standard has therefore been formulatedto provide a guidance for the selection of such stone for the purpose.This standard was first published in 1966.0.4 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test or analysis, shall be rounded off inaccordance with IS : 2-19GO*. The number of significant places retainedin the rounded off value should be the same as that of the specified valuein this stadard.

*Rules for rolmclinp otff numerical values (rev d).3


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IS : 3620 - 19791. SCOPE1.1 This standard lays down the requirements for dimensions, physicalproperties, and workmanship of rectangular blocks made from lateritestone, used in the construction of walls and partitions.2. GENERAL REQUIREMENTS2.1 The stone blocks shall be without any soft veins, cracks, cavities, flawsand similar imperfections.2.2 The blocks shall be exposed preferably for a period of three monthsbefore being used in the construction of masonry to ensure adequatestabilization However, exposure to rains should be avoided.3. DIMENSIONS AND TOLERANCES3.1 The standard size of laterite stone blocks shall be as specified inTable 1.

TABLE 1 SIZE OF LATERITE STONE BLOCKSAll dimensions in millimetrcs )

3.2 Sizes other than those mentioned in Table 1, may be supplied ifagreed to between the purchaser and the supplier.3.3 A tolerance of f5 mm shall be allowed on dimensions specifiedin Table 1.4. PHYSICAL PROPERTIES4.1 The physical properties of the laterite stone blocks shall conform tothe requirements given in co1 3 of Table 2 when tested in :rccordancewith the provision of the respective Indian Standard given in co1 4 niTable. 2.


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IS : 3620 1979

TABLE 2 PHYSICAL PROPERTIES OF LATERITE STONE BLOCKS( Clause 4.1 )

SL CHAXXACTERI~TIC REQUIRKWCNT METHOD OF TEST,No. REF 10(1) (2) (3) (4)i) Water absorption Not more than 12 percent IS : 1124-1974by mass

ii) Specific gravity Not less than 2.5 IS : 1124-1974*iii) Compressive strength Not less than 3.5 N/mm* IS : 1121 Part I )-1974t

NOTE - The compressive strength is for saturated dry samples.*Method of teat for determination of water absorption, apparent specific gravityand porosity of natural building stones Jirst reuision .tMethod of tests for determination of strength properties of natural building stones:Part I Comprrssive strength jrst reulsion.

5. WORKMANSHIP5.1 The blocks shall be of uniform shape with straight edges at rightangle.5.2 The edges of the block shall bc rough and chisel dressed as prescribedin IS : 1129-1972*.6. MARKING6.1 The blocks may be marked in a suitable manner with themanufacturers identification mark or initials.7. SAMPLING AND CRITERIA OF CONFORMITY7.1 Lot I n any consignment all the blocks from the same quarryshall be grouped together to constitute a lot.

7.1.1 Samples shall be selected and tested separately for each lot fordetermining its conformity or otherwise to the requirements of thespccificat ion.7.2 The number of blocks to be selected Sor the sample shall dependupon the size of the lot and shall be in accordance with Table 3.

*Spccifration for dressing of natural building stonrs first revisioft .5


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IS : 3620 1979TABLE 3 SAMPLE SIZE AND CRITERIA FOR CONFORMITY

( Clause 7.2 )No. OF NO.OPBLOCKSTOBE PERMISSIBLE No. SUB SA~LIPLEBLOCKS SELECTED IN THE 43lPLE CI~DEFECTIVES SIZE No.

1) 2) 3) (4)up to 100 5 0 3

101 to300 8 0 3301 to500 13 0 6501 and above 20 1 6

7.2.1 The blocks in the sample shall be selected at random and inorder to ensure the randomness of selection, random number table maybe used see IS : 4905-1968* ).7.3 All the blocks selected as given in co1 2 of Table 3 shall be examinedfor general requirements see 2 ), dimensions see 3 ), workmanship see 5 ).Any block failing in any one or more of the above requirements shall beconsidered to be defective. A lot shall be considered as conforming tothese requirements if the number of defectives obtained is not more thanthe permissible number of defectives given in co1 3 of Table 3.7.4 The lot having been found satisfactory with respect to generalrequirements, dimension and workmanship, shall be tested for physicalproperties. For this purpose a sub-sample of size as given in co1 4 ofTable 3 shall be selected at random. These blocks shall be first testedfor compressive strength and then for water absorption and specificgravity. A lot shall be considered to have satisfied the requirement ofphysical properties if none of the blocks tested for these requirementsfails in any of these tests.

Methods for random sampling.6


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i3UIyEAIIF INDIAN STANDARDSHeadquarters :Manak Bhavan, 9 Bahadur Shah &far Marg, NEW DELHI 110092ielephones : 3 31 01 31, 3 31 13 75 Telegrams : Manaksanstha

( Common to all Offices )Regional Offices : Telephone

este:n ; Manakalayd, E9 M/DC, Marol, Andherl ( East 1. 6 32 92 95BONlBAY 400093

IEastern : l/14 C. I. T. Schema Vi1 M, V I. P Road.Maniktola, CALCUTTA 700054 36 24 99

Nor?hern : SC0 445-446, Sector 35-CCHANDlGAFiH 169036 218433 i64l

Sotirhern : C. I. T Campus, MADRAS 600113 r4l 2442(412519i41 29166ranch Offices :Pushpak, Nurmohamed Shaikh Marg, Khanpur,

AHMADABAD 380GOlF Block. Unity Bldg, Narasimharaja Square,

BANSALORE 560002{

2 63 482 63 49

22 48 0Gnngotri Complex, 5th Floor, 8hadbhada Road. T. T. Nagar, 6 27 16EHOPAL 462033Plot No. 82/83, LeNis Road, BHUBANESHWAR 751002 5 36 275315 Ward No. 29. R. G. Barua Road, -5th Byelane. GU&A iATI 7810035-C-56C I_, N. Gupta Marg. (Nampaliy Station Road), 22 10 83HYDERABAD 500001R14 Yudhister Marg. C Scheme, JAIPUR 302005

117/418B Sarvodaya Nagar. KANPUR 208005Patliputra Industrial Estate, PATNA 8COO13Hantsx 8ldg 2nd Floor ), Rly Station Road,

TRIVANDRUM 695001

I6 34 7116 98 32

21 68 76f21 82 926 23 05

52 27lnspeclion Office With Sale Point f:lnstituticn of Engineers ( india) Building, 1332 Shivali Nagar. 5 24 35

PUNE 410005Seres 0:fice in Bombav is at Noveltv Chembera. Grant Road. 99 65 zePombav 400007tSales Office in Calcutta IJ et 5 Chowringhee Approech. P. 0. Pritwep 27 ss fxlStreet. Calcut ta 700072

--Reprography bit, BIE, New Delhi, lndu

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Is for Laterite