IS 809 : 1992 ( Reaffirmed 2001 ) VTch W-TT mv sstsr* %f+ry Yb;l Flmft ( fTiyr1 fGfiTf& vi$T@ %r g;ritsivr ) hdian Standard RUBBER FLOORING MATERIALS FOR GENERAL PURPOSES-SPECIFICATION ( First Revision ) ULK! 69-025-356 @ BIS 1992 BUREAU OF INDIAN .*...*w nrI*.,A., a n.rr*mrm STANDARDS nrr*r, W.F.D a.. z)/ll Printed at Swatantra Bharat Press, Delhi, India Flooring, Wall Finishing and Roofing Sectional Committee, CED 5 FOREWORD This Indian Standard ( First Revision ) was adopted by the Bureau of Indian Standards, after the draft finalized bv the : Flooring, Wall Finishing and Roofing Sectional Committee had been approved by the -Civil Engineering Division Council. The rubber floor coverings are used in the public and industrial buildings, buses and ships because of their fair wear-resistance quality, resiliency and reduction in noise. This standard was first published in 1957 and subsequently revised in 1970. The major changes made in the present revision are given below: a) Thickness of rubber flooring from 3 to 6 mm have been covered and pressure limits while measuring thickness have been specified; b) Methods of measuring tile size and squareness have been included; c) Sheet widths up to 2.1 m are covered; d) Maximum limit of hardness and permissible tolerances are included; and e) Provision for measurement of resistance to abrasion ( if agreed to between the purchaser and supplier ) has been included. In the fomulation of this standard due weightage has been given to international co-ordination among the standards and practices prevailing in different countries in addition to relating it to the practices in the field in this country. This has been met by deriving assistance from: BS 1711 : 1975 Solid rubber flooring. British Standards Institution. 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 rounded off in accordance with IS 2 : 1960 `Rules for rounding off numerical values ( revised )`. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS 809:1992 Indian Standard RUBBER FLOORING MATERIALS FOR GENERAL PURPOSES - SPECIFICATION ( First Revision ) 1 SCOPE This standard lays down the composition, workmanship and minimum requirements, prescribes tests for rubber flooring material suitable for covering floors of domestic and public buildings, cinemas, hospitals, large vehicles, etc. This stores, ships, transport standard does not cover the requirements for special types of rubber flooring used for electrical insulating purposes, conductive or antihaving static flooring or rubber flooring chemical and oil-resistant properties. 2 REFERENCES The Indian Standard listed in Annex necessary adjuncts to this standard. 3 COMPOSITION 3.1 The flooring shall be made from a compound of natural or synthetic rubber which may also contain reclaim rubber and suitable fillers. All colouring matter shall be of good quality, to alkalies and insoluble in water, resistant direct sunlight or artificial light. 3.1.1 Suitable cotton sheeting shall be used as backing. The cotton sheeting shall be impregnated with a high grade rubber compound. The hessian used for the backing shall conform to Type II hessian as specified in IS 2818 ( Part 2 ) : 1971. The hessian shall be impregnated with a high grade rubber compound. 4 WORKMANSHIP 4.1 Appearance The rubber flooring material shall be of first class workmanship, satisfactorily vulcanized, free from sulphur bloom and objectionable odour and blisters, cracks and embedded foreign matter to the extent that it complies with the intended design. There shall be no porosity on the surface or throughout the thickness of the sheet. The surface finish of the flooring shall be either glossy or mat. The base stratum may be of any colour. The underside of the floor 1 A are covering shall be either furnished with a cloth impression or be buffed smooth. The edges and ends shall be cut true and square. 4.2 Colour The colour of the flooring shall not be permanently affected by cleaning with water and a washing soap or by treatment with a suitable floor polish. The colour of the flooring shal1 not bleed into an adjacent piece of rubber. 5 DIMENSION 5.1 Thickness The nominal thickness of the rubber shall be one of the following: 3 mm 4 mm 5 mm 6 mm flooring 5.1.1 For all flooring the overall thickness when measured in the manner described in Annex B, shall not differ from the declared nominal value by more than 0.3 mm at any of the twenty measuring points. 5.1.2 If cloth/hession marking is present, the thickness of the flooring shall also be measured, using the apparatus described in Annex B, at three measuring points taken at one end of the roll. The cloth/hession marked side shall then be buffed down until the work just disappears. After buffing, the thickness at any one of the three measuring points shaII not diff'er from the original unbuffed thickness at the respective point by more than 0.6 mm. 5.2 Tile Sizes and Squareness Rubber flooring, when supplied in the form of tiles, shall be of any thickness ( in the case of ribbed or fluted rubber flooring, the thickness refers to the thickness of the base ) specified in 5.1 and of the following sizes: 200 mm x 200 mm 300 mm x 300 mm 500 mm x 500 mm IS 809 : 1992 5.2.1 The length of side shall not vary from the nominal value by more than 0.15 percent when tested according to the method described in Annex C. 5.2.2 There shall be no gap greater than 0.15 mm between any side of the tilt and the arm of the jig when the tile is tcstcd according to method described in Annex D. 5.3 Sheet Width Sheet material widths: C.9 m 1.2 m I.5 1.8 2.0 2.1 rn 111 6.3 Compression Set The compression set shall not exceed 15 percent when test pieces in new condition and test pieces in new condition aged in accordance with Annex F are tested in the manner described in IS 3400 ( Part IO ) : 1977, the duration and tempercture for the test being 24+0 hours and 27* 1°C respectively. -2 6.3.1 The test pieces shall show cracking after the test is conducted. 6.4 Resistance to Abrasion ( Optional no signs ) of sha!i have one of the following When tested in accordance with IS 3400 ( Par-t 3 ) : 1987 the abrasion resistance ~11~11 be as agreed between the purchaser and the supplier. 7 PACKING 7.1 Packing 7.1.1 Rubber flooring sheets shall be wrapped csn spool of suitable dimensions with the back side of the sheet in contact with the barrel of the spoci. 7.1.2 Rubber tiles shall be wrapped rn hessian cloth and packed in wooden crates. The cxtremc end tiles shall be faced back to av,>id damage to the surface of the tile. The dimensions of wooden boxes shall be as given in Table 2. Table 2 Size of Wooden Boxes Rubber `Tiles Size of rubber tiles Inside dimensions of wooden bcx m m AND MARKING 5.3.1 The width of the sheet at any point shall not be less than the nominal value, and shall not exceed the nominal value by more than 6 mm. 5.4 The sponge-backed rubber Ilnoring shall have a wearing surface of solid rubber at least 3 mm thick on a sponge rubber base of 3 mm thickness. 6 PERFORMANCE 6.1 Hardness The hardness when tested in accordance with IS 3400 ( Part 2 ) : 1980 shall be neither less than 65 IRHD ( International Rubber Hardness Degree ) nor greater than 96 IRHD. 6.1.1 Tolerances on Hardness hardness shall be as REQUIREMENTS Containing 200 x 200 mm 230x230 mm 500 x 500 mm 530x530 mm 300 x 300 mm 330x 330 mm 7.2 Marking Unless otherwise specified, each sheet, roll or tile shall be legibly and indelibly marked with the following: a) Indication of the source of manufacture; b) Thickness, width and length of sheets and rolls, and thickness and size for tiles; and c) Year of manufacture. 7.2.1 The flooring sheets, rolls or tiles may also be marked with the Standard Mark. AND CRITERIA FOR SAMPLING CONFORMITY Representative samples for various tests shall be drawn according to the method and scale of sampling described in Annex G. The criteria for conformity for sheets and tiles shall be in accordance with Annex G. 8 The tolerances on nominal described in Table 1. Table 1 Nominal 65 Over Hardness Tolerance in Hardness Tolerances on Hardness IRHD to 76 to lo 56 96 -- IRHD 15 Zt4 13 76 86 Ober 6.2 Water Absorption The rubber sheets and tiles shall not absorb water by weight tnore than 0.5 percent of the original weight when tested in the manner described in Annex E. 2 IS 809 : 1992 ANNEX A ( Clause 2 ) LIST OF REFERRED IS No. INDIAN STANDARDS Title Title Specification for cotton ings ( second revision ) sheet- IS No. 180 : 1984 28 I 8 ( Part 2 ) : Specification for Indian hession: 1971` ' Part 2 305 and 229 g/m2 at regain 16 percent contact (first revision ) 3400 ( Part 3 ) : Yfethl)ds of test for vulcanized 1987 rubbers : Part 3 Abrasion resistance using F rotating cylind Tical drum d :vice ( jirst revisio.? ). 3400 ( Part 2 ) : Methods of test for vulcanized 1980 rubbers : Part 2 Hardness (first revision ) 3400 ( Part 10 ) : Methods of test for vulcanized 1977 rubbers : Part 10 Compression set a. constant strain (first revisioA?) 4905 : 1968 Methods of random sampling ANNEX B ( Clauses 5.1.1 and 51.2 ) MEASUREMENT B-l APPARATUS OF THICKNESS as appropriate. by means of of reading to which exerts a less than 0.01 N/mm%. B-2.1.1 For sheet, material measure the thickness at twenty scattered points along the edges and ends Of the ro11. tiles, take the five tiles in the sample and for each tile measure the thickness at four scattered points. B-2.1.2 For Carry out thickness measurements a dial micrometer gauge, capable the nearest 0.02 mm, the foot of pressure of the rubber of not N/mm2 and not more than 0.021 B-2 PROCEDURE B-2.1 Proceed according to B-2.1.1 or B-2.1.2 ANNEX C ( Clause 5.2.1 ) MEASUREMENT C-l OF SIZE OF TILES Carry out the measurement with an instrument capable of measuring to an accuracy of 0.02 mm. Measure each tile for length and width at three quarter points in each direction 3 (see Fig. 1 ). The average of the three measurements in each direction shall be regarded as the dimension of the tile in that direction. IS 809 : 1992 FIG. 1 MEASUREMENT OF SIZE OF TILE ANNEX MEASUREMENT D-l APPARATUS D OF TILES ( Clause 5.2.2 ) OF SQUARENESS D-3 PROCEDURE The apparatus shall be an L-shaped metal jig compressing two arms each of length greater than the side of the tile to be tested and of approximately the same thickness, set in shape of a true right angle on a metal base plate ( see Fig. 2 ). This plate shall be perfectly flat and free from surface defects. D-2 NUMBER OF TEST PIECE Five tiles shall be used for the test. METAL Place the tiles against the jig, each corner in turn being inserted into the right angle and one side of the tile held against one side of the jig with light pressure. Measure any gap between each side of the tile and the other metal arm with a feeler gauge or microscope. JIG f `\-GAP O-15mm MAX TILE FIG. 2 METHOD OF CHECKING SQUARENESS OF TILE 4 IS 809 : 1992 ANNEX E ( Clause 6.2 ) DETERMINATION E-l PROCEDURE E-l.1 The OF WATER ABSORPTION test specimen, 100 mm x 100 mm with clean cut edges, shall be weighed to the nearest mg ( P, ) and immersed in distilled water at a temperature of 27 f. 2°C for 24 hours. It shall then be removed, superficially dried with filter paper and immediately weighed ( P, ). The absorption of water expressed as percentage increase in weight shall be computed from the following formula: ( p, - PI) p1 x 100 ANNEX F ( Clause 6.3 ) ACCELERATED AGEING F-l PRdCEDURE F-1.1 The changed about three times in an hour. F-l.2 for a after 27 f The specimen shall be aged in this manner continuous period of 240 hours and thereshall be kept for at least 24 hours at 2°C in darkness before being tested. NOTE - In view of the influence of exposure of samules to lkht in the course of accelerated ageing all such expckres should be as nearly indegticai as possible in tests intended for comparison. The preferable practice in all tests is to protect samples as completely as possible from the earliest moment against exposure to light. test pieces shall be placed in a thermostatically controlled air oven maintained at a temperature of 70 f l°C. The specimens in the oven shall be stationary, free from strain, freely exposed to air on all side and not exposed to light. The total volume of specimens shall not exceed 10 percent of the air space of the cvcn. Air at 70 f 1°C shall be passed into the oven at a uniform rate, which will ensure that the atmosphere in the oven is completely ANNEX G ( Clause 8.1 ) SAMPLING AND CRITERIA FOR CONFORMITY FLOORING MATERIALS OF RUBBER G-l LOT G-1.1 All the sheets or tiles of the same type and thickness and from the same batch of manufacture shall be grouped together to constitute a lot. G-1.1.1 Each lot shall be tested number of sheets or tiles to be selected for the samples shall be in accordance with Tables 3 and 4. For the randomness of selection of the sample the procedure as laid down in IS 4905 : 1968 shall be followed. G-l.3 Number of Tests and Criteria Conformity for Sheets for separately for determining its conformity or otherwise to the requirements of the specification. G-l.2 Representative samples for various tests shall be drawn at random from a lot. The 5 G-1.3.1 All the sheets selected in accordance with G-l.2 and co1 2 of Table 3 shall be inspected for appearance and dimensions, IS 809 : 1992 according to 4.1 and 5 respectively. Any sheet found to be defective for any o:le or more of the requirements shall be considered as defective. The lot shall be considered having satisfied the requirements of the specification for appearance and dimensions if the number of sheets found defective in the sampie is less than or equal to the permissible number of defective sheets given in co1 3 of Table 3. G-1.3.2 The lot having been found conforming requirements to the of appearance and dimensions shall ba tested for hardness, water absorption and compression set test. For this purpose a number of sheets in accordance with co1 4 of Table 3 from among those which have been found conforming under G-1.3.1 shall be selected at random. Number of specimens in accordance with relevant methods of tests shall be taken out from each of the sheets and tested for all these requirements. A sheet shall be considered as defective if the test specimens from the sheet fail to satisfy the requirements of any one or more of the tests. The lot shall be considered having satisfied the requirements of these'tests if the number of defective sheets in the sample is less than or equal to the permissible number of defective given in co1 5 of Table 3. G-l.4 Number of Sheets and Criteria for Conformity for Tiles G-1.4.1 All the sheets selected in accordance with G-l.2 and co1 2 of Table 4 shall be inspected for appearance and dinxnsions according to 4.1 and 5. Any tile found to be defective for any one or more of the requirements shall be considered as defective. The lot shall be considered having satisfied the requirements of the specification for appearance and dimensions if tile number of tiles found defective in the sample is less than or cqu:il to the permissible number of defective tiles given in co1 3 of Table 4. G-1.4.2 The lot havin;: been found conforming to the requirements of appzarancc and dimensions shalI be tested for hardness, w,!ter absorption and compression set tests. For ihi:; purpose a number of tiles in accordance with co1 4 of Table 4 from among those which have been found conforming under G-1.4.1 shall be seIected at random. Number of specimens in accordance with relevant methods of tests shall be takeil out from each of the tiles in the sample and tested for all these requirements. A tile shall be considered as defective if the test spscimens from the tiles fail to satisfy the requirements of any one or more of the tests. The lot shall be considered having satisfied the requirements of these tests if the number of defective tiles in the sample is less than or eaual to the permissible number of defective gi;en in co1 5 of Table 4. `Table No. of Sheets in the Lot 3 Sample Size ancl Permissible Number of Defective for Sheet For Appearance and Dimensions __-_*__-----_-._, --No, of Sheets to be Permissible No. Selected for the of Defectives Sample For Hardness, Water Absorptioll and Compression Set Tests r __---..-h.____-_--~ No. of Sheets to be Pclmissible No. Selected for the of Defectives Sample (4) 2 3 4 5 7 10 (5) 0 0 0 0 0 1 (`1 Up 26 51 101 151 301 to to to to to to 25 50 100 150 300 500 (2) 5 8 (3) 0 0 13 20 32 50 0 1 2 3 IS 809 : 1992 Table 4 Sample Size and Permissible Number of Defectives for Tiles No. of Sheets in the Lot For Appearance and Dimensions (-____-_h_---_7 Permissible No. No. of Tiles to be of Defectives Selected for the Sample (2) 13 20 32 50 80 125 (3) 0 1 2 3 5 7 For Hard less, Water Absorption and Col.lpression Set Tez.ts ~-----_--_--h--_--___~ i\io. of Ti es to be Permissible No. Selected for the of Defectives Sample (`9 2 3 5 8 13 20 (5) 0 0 0 0 0 1 up to 101 to 301 to 501 to 1 001 to 3001 to (1) 100 300 500 1 000 3 000 10000 Standard Mark The use of the Standard Mark is governed by the provisions of the Bureau of Indian made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. Standards Act, 2986 and the Rules and Regulations Bureau of Indian Staudard BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of 81s. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type Director or grade designations. Enquiries relating to copyright be addressed to the ( Publications ), ~1% Revision of Indian Standards if Indian Standards are reviewed periodically and revised, when necessary and amendments, any, are issued from time to time. Users of Indian Standards should ascertain that they are in may be possession of the latest amendments or edition. Comments on this Indian Standard sent to BIS giving the following reference: .` Dot : No. CED 5 ( 4526 ) Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN Headquarters : STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg, Telephones I 331 01 31, 331 13 75 New Delhi 110002 Telegrams f Manaksanstha ( Common to all Offices ) Telephone I 311 01 31 331 13 75 37 86 62 53 38 43 235 02 16 Regional Offices I Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002 Eastern : l/14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola CALCUTTA 700054 Northern Southern Western Branches z SC0 445-446, Sector 35-C, CHANDIGARH 160036 : C. I. T. Campus, IV Cross Road, MADRAS 600113 : Manakalaya, E9 MIDC, Marol, Andheri ( East ) 6 32 92 95 BOMBAY 400093 : AHMADABAD, BANGALORE, BHOPAL, BHUBANESHWAR, COIMBATORE, FARIDABAD, GHAZIABAD, GUWAHATI, HYDERABAD, JAIPUR, KANPUR, LUCKNOW, PATNA, THIRUVANANTHAPURAM. Printedat Printwoll Printerr.Aligarb, India