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इंटरनेट मानक Disclosure to Promote the Right To Information 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, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 2095-3 (1996): gypsum plaster boards, Part 3: Reinforced Gypsum plaster boards [CED 4: Building Limes and Gypsum Products] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 2095 ( Part 3 ) : 1996 REAFFIRMED 2009 1fT11 3 ~ ~ ~ ({grft4 ~efUT ) Indian Standard GYPSUM PLASTER BOARDS — SPECIFICATION PART 3 REINFORCED GYPSUM PLASTER BOARDS (Second Revision ) ICS 91.100.10 ©BIS1996 BUREAU OF INDIAN STANDARDS MANAKBHAVAN, 9BAHADURSHAHZAFAR MARG NEW DELHI 110002 March 1996 Price Group 3 AMENDMENT NO. 1 OcrOBER 1000 TO IS 2095( PART3) : 1996 GYPSUMPLASTER BOARDS - SPECIFICATION PART3 REINFORCEDGYPSUMPLASTERBOARDS (Sec0n4Rnision) (Foreword)-(meltthefollowingD1Itterbefotelastpili: •A scheme (orlabellingenvironment friendly prodUdS known II BOOMarkbas beenintroduced Ittbe instanceofthe MinistryofEnvironmentInd Forests(MEF), Government of India. The Eoo MarkwouldbeadministeleCl by theBulUu of IndianStandards(8IS) undertbe BISAct,1986a.pertheResolution No.71dated 21 FeblUll)'1991and No.425dated28October1992publisbed inthe Gazelleof tbeGovemmentofIndia. ForI producttobeeUgibleformlrkingwith ECOlogo,it shall.1socanytbelSIMarkorSISbesidesmeetingadditionaloptionalenvironment friendly~uimneDIl.Forthispurpose,theStandardMlrkofSISwouldbe• liagle markbeingI combinationoftbe 151 Markandthe ECOlogo. Requi.emenlltobe satisfied forI product to qUllifyforthe BISStandanlMarkforBOOfriendliDelS willbeoplioMJ;manufacturingunitswiDbetieetooptforthelSIMarkaloaeIiso. ThDamendJllcnt • based on the GazetteNotificationNo.170dated18May 1996 forwoodsubstitutesISenvironmentfriendlyproductspublisbedintheGazetteof1be GovernmentofIndia. Thisamendmentis,thelefo~,beingissuedtothisstandardto iacludeenvironmentfriendly~qujrements forwoodsubstitutes.' (Page2,clause4.1)-InsertthefollowingmailerIttheendoftheclause: 'By-productgypsumconfonningtotheJequi!ementsofIS12679:1987shallbeused fortheprepantionofplaster.' ( Page 4 ) - Insert tbe following matter Ifter 9.4.1 and renumber 1be subsequentcl.usa: '10 OmONALREQUIREMENTSFORECOMARK 10.1 GeneralRequlnnaents I. 10.1.1 TheproductshallconConnto the lCquilementa{orquality andperformance specifiedintbeltandald. 1 Amend No.1 to IS-2095(rart3): I'" 10.1.% The productmlnur.ctum mustproducetbe consentcleannce (romtbe concerned State Pollution Control Board I' per tbe provisions of Wate, (PreventiontUIdControl01Pollution)Act,1974IndAu(PrswntiollandControl ofPollution)Act, 1981 Ind Water (Prevelllioll andControl 01Pollution) Cess Act, 1977 along with tbe authorization, if required under Environment (Protectioli)Act,1986andtheRules made tbe~under toBISwhileapplyingCor EeO Mark appropriate with enforced Rules Ind Regulations of the Forest Department. 10.1.3 Theproductor productpackagingmay display inbriefthecriteriabased onwhichtbe producthasbeenlabelledenvironmentfriendly. 10.1.4 The materialused Cor productpickingshall be recyclable,reusableor biodegradable. 10.% Spe~lnc Requlre.eats 10.2.1 Building boards genenlly used I' plrtidonilll' panelling, claddllll and falseceilingsballbemaderromindustrialwaitesBucbIIpbospbo-gypsum. NOTE- ThemlDufacturershallprovidedocuaIealaryevideacebyWlyofcertif1cateor declantioa10thiseffecttoBISwhileIpplyiDIforECOMark.' (CED21 ) Repropapla,UDiI,SIS,NewDelhi,ladia AMENDMENT NO.2 SEPTEMBER 2006 TO IS 2095 (pART 3): 1996 GYPSUM PLASTER BOARDS - SPECIFICATION PART 3 REINFORCED GYPSUM PLASTER BOARDS (SecondRevision) [Page 4, clause10, Title (seea/so AmendmentNo.1)] - Substitute 'ADDITIONAL'for 'OPTIO~AL'. (CED4) ReprographyUnit, SIS,New Delhi,India Gypsum and Gypsum Based Products for Buildings Sectional Committee, CEO 21 FOREWOR.D This Indian Standard (Part 3) (Second Revision) was adoptedby the Bureau ofIndian Standards, after the draft finalized by the Gypsum and Gypsum Based Products for Buildings Sectional Committee had been approved by the Civil Engineering Division Council. The internal surfaces ofwalls and ceilings of most ofthe buildings are finished internally by applying plaster in one or more coats. In orderto reduce the demandofsite labour, the use ofbuilding board such as gypsum plaster board, fibre hard board, cement coir boards and asbestos cement building board as coveringfor wallsandceiling is increasingsteadily. Gypsumboardshavethe specificadvantageofbeing lighter than the boards ofsimilar nature, such as fibre hard boards and asbestos cement building boards. Gypsumboards also possess better fire-resisting, thermal and sound insulating properties. Sufficient quanitites ofnatural gypsum and by-product gypsum arc available in India. Though natural gypsum has been mostly used in the manufacture of gypsum boards, by-product gypsum after suitable treatment ifrequired is also equally suitable for manufacturing such boards. Gypsum boards may be manufactured as plain, laminated and reinforced boards. Reinforcing materials generally used as glass, paper, vegetable fibres, etc. The boards may be used to provide dry lining finishes to masonry walls, to ceilings, to steel or timber frame partitions,or asceilingstostructural steel columnsandbeams, or inthe manufactureofprefabricated partition panels. Laminated gypSUID boards are used for laying for concrete ceiling. With concrete it combines firmly and represents readymade interior plastering. Glass reinforced gypsum boards (GRG) are pseudo ductile materials having reasonably high flexural and impact strengths. GRG can be sawn, drilled, screwedor nailcdlike timber. Itisresistanttowhite ant andtermiteand completelynon-combustible. Beingisotropicin character, thinGRGpanelsmaybeusedcomparedtotimberpanels, hencecosteffective. GRG compositecanbe used as substitutefortimberforpanel door, wallpanelling,partitions. false ceiling, etc, and also as furniture components. The gypsum boards maybe fixed by nailing, screwing, or sticking with gypsum based or other adhesives. Gypsum boards specified in the standard have been covered in three parts. Part I covers plain boards, Part 2 covers laminated/coated boards. and Part 3 covers reinforced boards. Thispartdealswith differenttypes ofreinforcedgypsumplasterboards, its manufacture,testsandsampling. This standard is based on existing IS 8273:1984. Once this part 3 of IS 2095 is printed, existing IS 8273 : 1984 shall be withdrawn. For the purpose ofdel' 'ing whether a particular requirement ofthis standard is complied with, the final value, observedor calculated,expressingthe resultofatest or analysis, shall be roundedoffinaccordance with IS 2 : IlJ60 "Rules for rounding offnumerical values ( revised)'. The number ofsignificant places retained in the rounded offvalue should bt:the same as that ofthe specified value in this standard. IS 1095 ( Part 3 ) : 1996 Indian Standard GYPSUM PLASTER BOARDS - SPECIFICATION PART3 REINFORCEDGYPSUMPLASTERBOARDS (Second Revision) SCOPE ISNo. Title 1.1Thisstanda.rdcoversthe methodofmanufacture.. ( Part l/Sec 8 ) : 1978 Freedom from coarse testsand sampling offibrousgypsumplasterboards particles andglassfibrereinforcedgypsumboardsforuseasa lining materialforceiling,drysurfacingmaterialfor ( Part I/Sec 9 ) : 1978 Expansionofplaster wallsdoorpanelsor for partitions. ( Part l/Scc10) : 1978Sandinsetplaster 2 REFERENCES ( Part I/Secl1 ) : 1978 Wood fibre content in 2.1 The following Indian Standards are necessary woodfibregypsumplaster adjunctstothestandard. ( Part I/Sec12) : 1978Drybulkdensity Title ( Part 2) : 1981 Gypsumproducts(Section 2180 Methods of test for wood 1to 8 inonevolume), particleboardsandboards from other lignocellulosic ( Part 2/Sec 1) : 1981 Measurement of materials: dimensions ( Part 16) : 1977 Determination of water ( Part 2/Sec2 ) : ]lJ81 Determination of mass absorption (Part :.,Sec3 ) : 1981 Determinationofmassand (Part 17) : 1977 Determination ofswelling thickness of paper surfacing inwater ( Part 2/Sec 4 ) : I981 Transversestrength 2542 Method of test for ( Part 2/Sec5 ) : 1981 r 'essivestrength gypsum plaster, concrete andproducts: ( Part 2/Scc6 ) : 19~1 'bsorption (Part 1) : 1978 Plaster and concrete ( Part 2/Scc7 ) : 19~ content (Section 1 to 12 in one volume).. ( Part 2/Sec8 ) : 1981 1 etention of precast rc..~orccd gypsumslabs ( Part I/Sec I ) : 1978 Normal consistencv of gypsumplaster . 4905 : )lJ68 Methods for random sampling ( Part I/Scc 2 ) : 1978 Normal consistency of gypsum concrete 8272 : 1984 Specification for gypsum plaster for lise in the ( Part l/Sec 3 ) : 1978 Setting time of plaster manufacture of fibrous and concrete plaster boards ( first ( Part I/Sec4 ) : 1978 Transverse strength of revision) gypsumplaster 12679 : 1987 Specification for by product gypsum forusein ( Part I/Sec 5 ) : 1978 Compressive strength and plaster,blocksandboards dryset densityof gypsum plaster J TERMINOLOGY ( Part I/Sec6 ) : 1978 Soundness of gypsum 3.1 Forthe purposeof this standard, the following plaster definitionsshallapply. ( Part I/Sec 7 ) : 1978 Mechanical resistance of gypsum plaster by 3.2 Fibrous Gypsum Plaster Board droppingballtest Acompositionofgypsumplaster and sisal,coconut IS 2095 ( Part J ) : 1996 juteorotherfibreformingbodyofregulardimensions. the face gauge as to over hang the edges by 50mm. 3.3 Glass Reinforced Gypsum Boards e) Therequisiteamountofbodyplastershallthen A composition of gypsum plaster and glass fibre bepouredoverthe fibre,and thefibre shallbe forming bodyofregular dimensions. pressed and rolleddownuntil it is thoroughly incorporated in the bodyplaster. 4 MATERIALS f) The overhanging fibreshall beturned into the 4.1 Gypsum Plaster board to strengthen the edges and the whole For the ordinary fibrous and GRG gypsum plaster boardshall thenberuled toan eventhickness. boards, the gypsum plaster shall comply with 5.1.2 Method 2 requirementsofIS8272:1984. ForhighstrengthGRG Boards,gypsumplaster of properties : The procedurefor manufacture shall beas follows: i) Fineness--.--Notmore than5percent retained a) Asteelmould,1mmthinnerthanthethickness on BISSieve( 75 Micron ), of the board required, shall be laid over a ii) NormalConsistency Min 60 percent, and concretecastingtablehaving surfacetrowelled 0- iii) CompressiveStrength - Min 16.0 M.Pa. toahighglossortablesurfacedwith polyester resin. ....2 Fibre b) Thetableshallbecoatedwithathinlayerofoil Thereinforcingfibremaybesisaloramixtureofsuch to prevent the plaster board sticking to the sisal fibreand coconutcontaining not 1110re than 20 surface. percentby massof coconut fibre. It shall be of the approvedquality,thoroughlyteasedandfreefromdust, c) Gypsum plaster shall be gauged to an even grease. or other substances likely to affect strength consistency free from IUIUpS at water-plaster of the fibrousplaster boards. For GRGBoards, the ratioof0.5 to0.6.\ This shall bespreadevenly reinforcing fibre shall be of 'Estype having good to coverthe entire surface ofthe casting table choppingcharacteristics and dispersibility. within themouldtoan eventhicknessof1.5to 2.0 rum and allowedtosetpartially. ....3 Potable waters arc generally considered satisfactory for mixing plaster. d) Aplasterofthinnerconsistencyatwater-plaster ratioof'O.? to0.8 shallbepreparedandpoured 4.4 Oil and Greases on the bench to cover it to about the depth of Theoilandgreasesusedinthepreparationofbenches thebenchbars. andmouldsforcasting shall besuchaswillleavethe c) Whentheplasterhasspreadevenly,teasedfibre plastersurfaceoftheproductcleanand unstained. at the rate of not less than 250 g/m' ofboard shall be spread over the table. This shall be 5 METH()DOF MANUFACTURE incorporatedintotheplasterbyrunningafluted 5.1 Fibre Gypsum Plaster Board roller overthe table. The plaster boardshall bemanufacturedbyeither of f) The overhanging'edge of fibre shall be next the methodsdescribedin5.1.1 and 5.1.2. turned back to strengthen the edges and the plasterruledoffwithascreedingbartoaneven 5.1.1 Method I thickness. The procedurefor manufacture shall beas follows: g) Whenthesheethashardenedsufficientlv,itshall be liftedand placed inrackstodry. . a) Asteelmould1mmthinner thanthethickness of the board required, shall be laid over a 5.2 Glass Reinforced Gypsum Boards concretecastingtable having smoothtrowelled surface or polished stone surface. 5.2.1 TheGRGBoardmaybemanufacturedeitherby spray suction technique or premixing method. The b) Thetableshallbecoatedwithathinlaverofoil mainobjectivesofthesemethodsistoensurethorough to prevent ht plaster board sticking to the dispersal ofthe glassfibre in the plaster slurry. surface. 6 DIMENSIONSANDTOLERANCES c) Gypsum plaster shall be gauged to an even consistency free from lumps. This shall be 6.1 Shape spreadevenlytocovertheentire surfaceofthe Theboardsshallbesquareorrectangular in shape. casting table within the mould to an even thickness of4mill and allowedtosetpartially. 6.2 Dimensions d) The requisite amount of fibre reinforcement Length, widthand thicknessofthe boardshallbeas shall be distributed evenlyoverthe surface of specifiedinTable 1. 2