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 © BIS 1996 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 March 1996 Price Group 3 AMENDMENT NO. 1 OcrOBER 1000 TO IS 2095 ( PART 3 ) : 1996 GYPSUM PLASTER BOARDS - SPECIFICATION PART 3 REINFORCED GYPSUM PLASTER BOARDS ( Sec0n4 Rnision) (Foreword) -(melt the following D1Itter befotelast pili: ·A scheme (or labelling environment friendly prodUdS known I I BOO Mark bas been introduced It tbe instance of the Ministry of Environment Ind Forests (MEF), Government of India. The Eoo Mark would be administeleCl by the BulUu of Indian Standards (8IS) under tbe BISAct, 1986 a. per the Resolution No. 71 dated 21 FeblUll)' 1991 and No. 425 dated 28 October 1992 publisbed in the Gazelle of tbe Govemment of India. ForI productto be eUgible for mlrking with ECO logo, it shall.1so cany tbe lSI Mark or SIS besidesmeetingadditional optionalenvironment friendly ~uimneDIl. For this purpose, the Standard Mlrk of SIS would be· liagle mark being I combination of tbe 151 Mark and the ECO logo. Requi.emenll to be satisfied for I product to qUllify for the BIS Standanl Mark for BOO friendliDelS will be oplioMJ; manufacturing unitswiD be tieeto opt for the lSI Mark aloae Iiso. ThD amendJllcnt · based on the Gazette Notification No. 170 dated 18 May 1996 for wood substitutes IS environment friendly products publisbed in the Gazette of 1be Government of India. This amendment is, thelefo~, being issuedto this standard to iacludeenvironment friendly ~qujrements for wood substitutes.' ( Page 2, clause 4.1 ) -Insert the following mailerIt the end of the clause: 'By-productgypsumconfonning to the Jequi!ements of IS 12679:1987 shall be used for the prepantion of plaster.' ( Page 4 ) subsequent cl.usa: Insert tbe following matter Ifter 9.4.1 and renumber 1be '10 OmONAL REQUIREMENTS FOR ECO MARK I. 10.1 General Requlnnaents 10.1.1 The product shall conConn to the lCquilementa {orquality and performance specified in tbe ltandald. 1 Amend No.1 to IS -2095 ( rart 3 ) : I'" 10.1.% The product mlnur.ctum must produce tbe consent cleannce (rom tbe concerned State Pollution Control Board I ' per tbe provisions of Wate, (Prevention tUId Control01Pollution) Act, 1974 Ind Au (Prswntioll and Control of Pollution) Act, 1981 Ind Water (Prevelllioll and Control 01 Pollution) Cess Act, 1977 along with tbe authorization, if required under Environment (Protectioli) Act, 1986and the Rules made tbe~under to BIS while applying Cor EeO Mark appropriate with enforced Rules Ind Regulations of the Forest Department. 10.1.3 The product or product packaging may display in brief the criteria based on which tbe product has been labelled environment friendly. 10.1.4 The material used Cor product picking shall be recyclable, reusable or biodegradable. 10.% Spe~lnc Requlre.eats 10.2.1 Building boards genenlly used I ' plrtidonilll' panelling, claddllll and false ceiling sball be made rrom industrial waites Bucb I I pbospbo-gypsum. NOTE - The mlDufacturer shall provide docuaIealary evideace by Wly of certif1cate or declantioa 10this effect to BIS while IpplyiDI for ECO Mark.' (CED21 ) Repropapla, UDiI, SIS, New Delhi, ladia AMENDMENT NO.2 SEPTEMBER 2006 TO IS 2095 (pART 3): 1996 GYPSUM PLASTER BOARDS - SPECIFICATION PART 3 REINFORCED GYPSUM PLASTER BOARDS ( Second Revision) [Page 4, clause 10, Title ( see a/so Amendment No.1)] - Substitute 'ADDITIONAL'for 'OPTIO~AL'. (CED 4) Reprography Unit, 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 adopted by the Bureau of Indian 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 of walls and ceilings of most of the buildings are finished internally by applying plaster in one or more coats. In order to reduce the demand of site labour, the use of building board such as gypsum plaster board, fibre hard board, cement coir boards and asbestos cement building board as covering for walls and ceiling is increasing steadily. Gypsum boards have the specific advantage of being lighter than the boards of similar nature, such as fibre hard boards and asbestos cement building boards. Gypsum boards also possess better fire-resisting, thermal and sound insulating properties. Sufficient quanitites of natural 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 if required 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 as ceilings to structural steel columns and beams, or in the manufacture of prefabricated 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, dri lled, screwed or nail cd like timber. It is resistant to white ant and termite and completely non-combustible. Being isotropic in character, thin GRG panels may be used compared to timber panels, hence cost effective. GRG composite can be used as substitute for timber for panel door, wall panelling, partitions. false ceiling, etc, and also as furniture components. The gypsum boards may be 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. This part deals with different types of reinforced gypsum plaster boards, its manufacture, tests and sampling. 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 of del' 'ing 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 rounded offin accordance with IS 2 : I lJ60 "Rules for rounding off numerical values ( revised)'. The number of significant places retained in the rounded off value should bt: the same as that of the specified value in this standard. IS 1095 ( Part 3 ) : 1996 Indian Standard GYPSUM PLASTER BOARDS - SPECIFICATION PART 3 REINFORCED GYPSUM PLASTER BOARDS (Second Revision) SCOPE IS No. Title 8 ) : 1.1 This standa.rd covers the method of manufacture.. tests and sampling of fibrous gypsum plaster boards and glass fibre reinforced gypsumboards for use as a lining material for ceiling, dry surfacing material for walls door panels or for partitions. 2 REFERENCES 2.1 The following Indian Standards are necessary adjuncts to the standard. ( Part l/Sec 1978 Freedom from coarse particles ( Part I/Sec 9 ) : 1978 Expansion of plaster ( Part l/Scc 10 ) : 1978 Sand in set plaster ( Part I/Secl1 ) : 1978 Wood fibre content in wood fibre gypsum plaster ( Part I/Sec12 ) : 1978 Dry bulk density ( Part 2) : 1981 Title 2180 Methods of test for wood particle boards and boards from other lignocellulosic materials: Determination of water absorption Gypsum products (Section 1 to 8 in one volume), of ( Part 2/Sec 1 ) : 1981 Measurement dimensions ( Part 2/Sec 2 ) : ]lJ81 Determination of mass ( Part 16 ) : 1977 ( Part 17 ) : 1977 2542 Determination of swelling in water Method of test for gypsum plaster, concrete and products: Plaster and concrete (Section 1 to 12 in one volume).. ( Part :.,Sec 3 ) : 1981 Determination of mass and thickness of paper surfacing ( Part 2/Sec 4 ) : I981 Transverse strength ( Part 2/Sec 5 ) : 1981 r 'essive strength 'bsorption ( Part 2/Scc 6 ) : ( Part 2/Scc 7 ) : 19~1 ( Part 1 ) : 1978 19~ 1 content etention of precast rc.. ~orccd gypsum slabs Methods sampling for random ( Part 2/Sec 8 ) : 1981 4905 : )lJ68 ( Part I/Sec I ) : 1978 Normal consistencv of gypsum plaster . ( Part I/Scc 2 ) : 1978 Normal consistency of gypsum concrete ( Part l/Sec 3 ) : 1978 Setting time of plaster 8272 : 1984 and concrete ( Part I/Sec 4 ) : 1978 Transverse strength of gypsum plaster ( Part I/Sec 5 ) : 1978 Compressive strength and dry set density of gypsum plaster ( Part I/Sec 6 ) : 1978 Soundness of gypsum plaster Specification for plaster for lise manufacture of plaster boards revision) gypsum in the fibrous ( first 12679 : 1987 Specification for byproduct gypsum for use in plaster, blocks and boards J TERMINOLOGY 3.1 For the purpose of this standard, the following definitions shall apply. 3.2 Fibrous Gypsum Plaster Board resistance ( Part I/Sec 7 ) : 1978 Mechanical of gypsum plaster by dropping ball test A composition of gypsum plaster and sisal, coconut IS 2095 ( Part J ) : 1996 jute or other fibre forming bodyof regular dimensions. 3.3 Glass Reinforced Gypsum Boards A composition of gypsum plaster and glass fibre the face gauge as to over hang the edges by 50mm. forming body of regular dimensions. 4 MATERIALS 4.1 Gypsum Plaster e) The requisite amount of body plaster shall then be poured over the fibre, and the fibre shall be pressed and rolled down until it is thoroughly incorporated in the body plaster. f) The overhanging fibre shall be turned into the board to strengthen the edges and the whole board shall then be ruled to an even thickness. For the ordinary fibrous and GRG gypsum plaster boards, the gypsum plaster shall comply with requirementsof IS 8272: 1984. For high strength GRG Boards, gypsum plaster of properties : i) Fineness --.-- Not more than 5 percent retained on BIS Sieve ( 75 Micron ), ii) Normal Consistency Min 60 percent, and iii) Compressive Strength - Min 16.0 M.Pa. 0- 5.1.2 Method 2 The procedure for manufacture shall be as follows: a) A steel mould, 1 mm thinner than the thickness of the board required, shall be laid over a concrete casting table having surface trowelled to a high gloss or table surfaced with polyester resin. b) The table shall be coated with a thin layer of oil to prevent the plaster board sticking to the surface. c) Gypsum plaster shall be gauged to an even consistency free from IUIUpS at water-plaster ratio of 0.5 to 0.6.\ This shall be spread evenly to cover the entire surface of the casting table within the mould to an even thickness of 1.5 to 2.0 rum and allowed to set partially. d) A plaster of thinner consistency at water-plaster ratio of'O.? to 0.8 shall be prepared and poured on the bench to cover it to about the depth of the bench bars. c) When the plaster has spread evenly,teased fibre at the rate of not less than 250 g/m' of board shall be spread over the table. This shall be incorporated into the plaster by running a fluted roller over the table. f) The overhanging 'edge of fibre shall be next ....2 Fibre The reinforcing fibre may be sisal or a mixture of such sisal fibre and coconut containing not 1110re than 20 percent by mass of coconut fibre. It shall be of the approvedquality, thoroughlyteasedand free from dust, grease. or other substances likely to affect strength of the fibrous plaster boards. For GRG Boards, the reinforcing fibre shall be of 'Estype having good chopping characteristics and dispersibility. .... 3 Potable waters arc generally considered satisfactory for mixing plaster. 4.4 Oil and Greases The oil and greases used in the preparation of benches and moulds for casting shall be such as will leave the plaster surface of the product clean and unstained. 5 METH()D OF MANUFACTURE 5.1 Fibre Gypsum Plaster Board The plaster board shall be manufactured by either of the methods described in 5.1.1 and 5.1.2. 5.1.1 Method I turned back to strengthen the edges and the plaster ruled offwith a screeding bar to an even thickness. g) Whenthe sheet has hardened sufficientlv, it shall be lifted and placed in racks to dry. . 5.2 Glass Reinforced Gypsum Boards 5.2.1 The GRG Board may be manufactured either by spray suction technique or premixing method. The main objectivesof these methods is to ensure thorough dispersal of the glass fibre in the plaster slurry. The procedure for manufacture shall be as follows: a) A steel mould 1 mm thinner than the thickness of the board required, shall be laid over a concrete casting table having smooth trowelled surface or polished stone surface. b) The table shall be coated with a thin laver of oil to prevent ht plaster board sticking to the surface. c) Gypsum plaster shall be gauged to an even consistency free from lumps. This shall be spread evenly to cover the entire surface of the casting table within the mould to an even thickness of 4 mill and allowed to set partially. d) The requisite amount of fibre reinforcement shall be distributed evenly over the surface of 6 DIMENSIONS AND TOLERANCES 6.1 Shape The boards shall be square or rectangular in shape. 6.2 Dimensions Length, width and thickness of the board shall be as specified in Table 1. 2 IS 2095 ( Part J ) : 1996 6.3 Mass of Plaster The minimum mass of plasterper squaremetre of board shall be as given in Table 1. 6.4 Density 2542(Part 2/Sec 1 to 8): 1981. When subjected to a load of 340 N, the deflection of the specimen shall not exceed 19 film. Should the deflection under proof load be less than 6 mm, the load shall be increased until failure occurs. The specimen shall then deflect not less than 6 mm before failure occurs. 8.3.1 Flexural Strength The minimum densityof board shall be as per the value specified in Table 1. 6.5 Tolerances Tolerances shall be as given below: a) b) ORO boards when tested as per IS 2542 ( Part 2/Scc 4) : ]981. Shall have flexural strength as per the value specified in Table 2. 8.3.2 Impact Strength Length Width +Omm -6 + 0 mrn -5 ± 1.0 nun The boards when tested as per Charpy test shall have flexural strength as per the value specified in Table 2. 8.4 Jolting Test c) 7 FINISH Thickness 7.1 The surface of the boards shall be true and free from imperfection that would render the board unfit for uses. The edge shall be straight and the corners shall be square. 8 TESTS The boards shall be tested in the manner descnbed in Annex A. None of the sample should show crack or chil'ping off from the surface before 80 cycles of jolting, 8.5 Free Moisture Averagefree moisture of the samples shall not exceed 2 percent when tested as per IS 2542 ( Part 2 .> : 1981. 8.6 Surface Hardness Test The test shall be carried out as given at Annex B. The diameter of any impression shall not exceed 8 n1m for both materials, 8.1 Visual Inspection All boards shall be sound, free from cracks, brokenedges and such other imperfections that would render them unfit for use. 8.2 Thickness 8.7 Water Absorption For GRG Boards 3S per IS 2380 (Part 16) : 1971. the value shall not exceed 15 percent in 24 hour. 8.8 The mean thickness of the board shall be determined as described in IS 2542 (Part 2/Sec I to 8) : 1981. 8.3 Transverse/Flexural Strength Swelling The test shall be carried out as described in IS GRG when tested as per IS 2380 (Part 17) : 1977. the value shall not exceed 0.5 percent in 24 hours. Table 1 Dimensions and Other Particularsof Fibrous Gypsum Plaster Board and GRG Board ( Clauses 6.2, 6.3 and 6.4 ) Board Thickness · Length Width (W) 32 ~ S SOlto 1000 I 001 and above 3 7 S 10 4 IS 1095 ( Part 3 ) : 1996 manufacturer and may be accompanied with detailed instructions for proper use. 10.3 Each board shall be clearly and permanently marked with the following information: 10.4 DIS Certification Marking The board may also be marked with the BIS Certification Marks. 10.4.1 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986andRules and Regulations madethereunder. The details of conditionsunder which the licencefor the use of Standard Mark may be granted to manufacturers or producers maybe obtained from the Bureauof Indian Standards. a) b) c) d) Manufacturer's name or trade-mark; Size of boards; Yearof manufacture; and List of identified critical ingredients in descending orders of quantity, percent by mass, ( (_~/ause ANNEXA 8.4 ) JOLTING TEST A-I Three test pieces 250 x 250 111nl shall be cut out from different placesof each of the boards selected for flexural and impact strength tests and each of them shall be subjectedto the 'Jolting Test' performed in the following manner: The samplepieceis to be held in a horizontalposition 75 Clll above a hard wooden tabletop and then dropped on the table horizontally. Care should be taken so that the test piece does not land on its edges of corners. ANNEXB ( Clause 8.6 ) SURFACE HARDNESS TEST B-1 PROCEDURE 8-1.1 This test shall be carried out on the surface of an undamaged sheet and at three points. A steel ball 10 DIm in diameter and with a load of 150N is placed gently on the surfaceof the test specimen and kept In position for 5 minutes. At the end of the specified period. the ball along with the load shall be removed and the diameter of impression measured. Bureau or Indian Standards BIS is a statutory institution established under the Bureau o/Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality ceniftcation of goods and attending to connected matters in the country. Copyright DIS has the copyright ofallitspublications. No part ofthese publlcatlons may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressedto the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changesare needed; if the review indicates that changes are needed, it is taken up tor revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments-oredition by referring to the latest issueof 'BIS Handbook' and 'Standards MonthlyAdditions'. This Indian Standard has been developed from Doc No. CED 21 (5465) Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIANSTANDARDS Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg,NewDelhi 110002 Telephones: 331 0131,33113 75, 371 9402 Regional Offices : Central : Manak Bhavan,9 Bahadur Shah Zafar Marg NEW DELHI 110002 Eastern : 1/14C. I.T. SchemeVII M, V. I. P. 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