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.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 2114 (1984): Code of practice for laying in-situterrazzo floor finish [CED 5: Flooring, Wall Finishing andRoofing]

IS : 2114 - 1984( Reaffirmed 2006 )

Indian StandardCODE OF PRACTICE FOR

LAYING IN-SITU TERRAZZO FLOOR FINISH

( First Revision)

Fourth Reprint JANUARY 1999

( Incorporatinl Amendment No. I )

UDC 69.025.332:006.76

Copyright 1992

BUREAU OF IND lAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

October 1984

cw".,.S.al O. P. MlftAL

8.252. PaDCb.ila ParkNew Delhi 110017

R'/Jru,,.,i,.,Natlo.al Test Houle, Calcutta

11,2114.1.

Indian StandardCODE OF PRACTICE FOR

LAYING IN·SITUTBRRAZZO FLOOR FINISH

( First Revision)

Flooring and Plastering Sectional Committee, BDO :;

MI",6I"5MBI s. K. BA2f.R~"

Slla, P. R. DA8 ( ~"""." )SaRI N. BORALllfOIAlI Builden' Association 01India, BombaySHUI DINKel1 A. CUOK8JII Arcoy Indultriel, Ahmad"bad

SKat RAIIKLAI. A. CUOKSIII ( .41'""." )n••UTV 0la80'lOll ( AmeJl ) Il~.e.rch Desilnl aad St:andard. Orlan;'"ati.,n

. ( M1Diatry of R.allwa)s ). LucltnowDUUTY Dll&,BOTOI& ( D .. S ) ( Alt""." )

DllnacTou Maharalhtra EOliDeerinl R.elcarell Institult',N••ik .

a.I.ARCS Or..It}JlR ( MA'I'lmIALTaTllIG DJ't'JIIOK) (Alllrn.")

D. V. S. GUIITA Fertlliier (PlaDnlnl and Dcvclorlmcnt) India· Limited. Sindri ( Bihar)

S8.1 K. V. GunlJswAllY Indian Oil COllpOration Limited. Nc\\' D,lhiSIIBI G. V. PAffoAaxAR ( All,mtll,)

S.al S. C. KA.OOU Modern Til•• and Marble, New DelhiSn.J A. C. KAPOOR ( Alt",.." )

BRIO D. R. KATJlVRIA IDititution of Engiacen ( India), CalcuttaSURI K. E. S. MAN! Dhor Industries Limited, Bombay

SHU R.,,_V,fIH D. PATU ( A'a"n8" )DR MORAIr RAJ Central n'aildlD, Research Institute (CSIR it

Roork.eDR R. K.JAIIf ( Alt""tlI,)

SHRI M. V. MUl&UQAPPAlf Coromaadel Prodorite P,'t Ltd, Ma,lrasSHRI R. SnllflvA8 AN ( AI'"".I, )

C C.".1,i~Ia' 1111BUltEAU OF ·INDIAN STANJ'ARDS

Thil publicatiob ia protertfd lInd,.r the' 1,,4i.; C"/!,,ir'" Act ( XIV of 1!J:j7 ) andreproductioa ia whole or ill part by any metana f'xcrpt with wriltl'n pcrmi ..,ioR of tl,.­publilher""l1 be deemed to be aD Wrmaemenl of copyright undf!t th.. laid Arl.

J& I 2114 • 1914

Dinetor GeDerat, IS I ( E.·."'u. M,,,.6n )

Public Worb Departmcut. Government 01TamilNadu, Madras

Ex.cvS'IV. EHOllt... ( .411"".,,)SUpnllfftJlDIIIO SUBVftOa 0.. Ctntral DC'si,D Organization, Cenlral Public

WORKI ( CZ ) .... Work. Department, New DelhiSuavltlo. 0.. WOB.8 (CZ)(AI,,,,..,, )

S.810. R.aIlA.,Director ( ely Eng. )

M""",, R'/W'llItli",Sua. RA• .lIY SneoK Ministry of DeCt'DCo ( DRDO ), New Dellai

S.BI K. A. SVYBAlIXAR ( ~I,,,.,. )8.,,1 O. P. RATa. National Buildin,. Or,anil.lioll, New D~lhj

S8.1 D. B. So Indiaa la.litut. or Architectl, BombaySBal S. B. SHIRO••MY ( .All••" )

S••IJ. K. K. SbfGHAltlA £a.incer.in-Cbicr'. Bnnch ( Ministry ofDel'eace )New Delbi

MAl S. P. SSA". (Min"'" )IIUd P. SRI.IV.I.. CoDent. Association or Jodi_, Bombay

SRRI G. R. J08111 (, ~I',,"", )SU...UCftDlDIIiG E~ol••n

Sllf""'JSllnl A. K. AVA8'1'HY

ASlilt.nc Director ( Civ EaSI ), JSI

Cement Concrete Flooring and Other MiscellaneousWorks Subcommittee. DDC 5 : 7

COIIIJIUf

S,IKI o. P. MJ'I'7AL8-252J Panch,Ua Park

New Delhi

M""'",,SHill N. BORALI);OIAB Builder,' Association or India, BombaySIIKI S. C. KAItOOB Modern Tile. &, Marble, New Delhi

SIIKI A. C. KAltOO. ( All""." )DR MORA. RAJ C~ntral Suildinl RCI(...rch In.titute (CSIR.).

RoorkeeSBRI B. S. Gl.l''I'A (AII"".', )

SIIRI M. P. rA'rKAR Central Public Works Departnlent. New DelhiSnVSYOll o. 'Yoab ( AVN ) ( All"".,.)

SB"J G. C. SJlA••A Indian Institute or Architects, BombaySIIRI NAB.1i KOCHAR (AI,,,,,.,.)

SaRI P. N. TALWAR The Northern India Tiles Corporation, New DelhiSual W. N. T ALWAB (Alt"",," )

SIIRI M. G. \'n••AlIl Enllneer.in Chief'. Branch, Army Headquarter••New DeJhi

SJIDI S. K. M.\LIE (Alt"nal, )

2

III 211t .1_

Indian StandardCODE OF PRACTICE FOR

LAYING IN-SITU TERRAZZO FLOOR FINISH

( First Revision)

o. FOREWORD

0.1 Thia Indian Standard ( First R.evision ) was adopted by the IndianStandards Institution on 31 July 1984, aner the draft finalized by theFlooring and Plastering Sectional Committee had been approved by theCivil Engineering Division Council.0.2 In-lilu terrazzo is a popular floor finish in residential and public build­ings preferred for its decorative and wearing properties and facility for easycleaning_ However, certain essential precautions are called for in layingthe ftoor to avoid crack development and consequent trouble in mainte­nance. This standard is intended for-providing guidance in the selection ofmatenals and in the laying and finishing of terrazzo floor so that asatisfactory performance is obtained for the finish.0.3 This standard was first published in 1962. The use of Portlandpozzolana cement conforming to IS: 1489-1976· has been included in thisrevision. The combined thickness of the under layer and topping forftooring bas also been reduced to 30 mm. Provision of cutting of dividioSmetallic strips for anchorage purposes has also been deleted.0.4 The Sectional Committee responslble for the preparation of this .tan­clard has taken into consideration the views of producers, consumen ,andtflChnologists and has related the standard to the mallufacturing and tradepractices followed in the country in this field. Due weightage haa also beengiven to the need for internatIonal co-ordination amoDg standards prevail­ing in different countries of the world in this field.0.5 For the purpose of deciding whether a particular requirement of thisltandard is complied with. the final value, observed or calculated, express­ing the result of a telt or analysis, shall be rounded off in accordancewith IS: 2.196Ot. The number of significant places retained in therounded oft'value should be the same as that of the specifted value in thisstandard.

• Specification for portlaDd-pozaol,na cement ( I',.rul 'lI1;a." ).tRulel lor rouDdiDI off Dumerical values (,.,M).

3

ra. 2114. 1114

I. SCOPE

1.1 This standard covers the laying and finishing of tn-ntu terrazzc Iloors,skirtings and dadoes.

2. TERMINOLOGY

2.0 For the purpose of this standard, the definitions of terms given inIS : 10403·1983* shall apply.

3. NRCESSARY INFORMATION

3..1 For the efficient planning and execution of the work detailed informa­tion with regard to the following is necessary:

a) Floor area to be covered;b) Location and size of openings, if any, to be left out;c) Details of the base of sub-floor;d) The type and grades of aggregates to be used and specific require.

ments, if any, regarding the pattern, colour and appearance of thefinished su-faee; and

e) Treatment at all corners and adjacent floon or walls.

3.2 All the information stated in 3.1 shaH be made available by the appro­priate authority responsible for the construction of the whole building tothose- wno are entrusted with the work of laying the terraseo floos beforethe work i1 started. Necessary drawings and instructions for preparatorywork shall also be giv(ltll where required.

3.3 Arrangements shall also be made for the proper exchange of informa­tion between those engaged in laying the floor finish and all others whosework will effect or will be affected.

f. MATERIALS

4.1 Allregates - The aggregates used in terrazzo topping shall bemarble aggregates size varying from 1 mm to 25 mm, Marble powder usedin terrazzo topping shall pass through sieve 300 conforming to IS : 460( Part I )-1978t. Aggregates for terrazzo underlayer as well as the baseconcrete shall conform to the requirements of IS : 383-197Qt.

4.2 Cement - Cement used for the Roor work shall conform to IS : 269­1976§, IS : -1-55-197611 or IS : 1489-1976",

-Glossary of term. relating to building finllhes.tSpef'ilication for test lieves : Part I Wire cloth test .it-ves ( ..".,,4 "vis;," ).iSpl'cificalion for coane and fifte -IBrelatea flam naturallources for concrete ( S"'"~

,'tin." ).§Speri6cation Cor ordinary and low heat Portland eement ( tl,i,tI '11 ;sion ).Ir«;pecification (or Portland slag cem~nt (,IIi,4 "vui'll ),'Specil1catioD Cor PortlaDd-pozzolana cement ( s",ntl "c,i..i.1I ).

4

II • 21lt • lilt

• .:1 wwe. (1__t -It.haD comorm to IS: 80+2·1978-.

t.f Pi..... - The pipneDti to be used in ternzzo 'baD be ofpa:manent colour aDd iha11 coDform to the requirements mentioned illTable I.

f.5 Wa-. - Water uted for mixinl and curing shall coDform to therequirements liven in 4.3 or 18 : 456-1978t.

4.8 Dlftdlalltrlpll - The material (or cllvidiDI.tri~ shall be lOchthatit h.. limilar relistance to wear u the ftooring. The dividing .tri~ maybe aluminium, brUl, copper. 8-, Dlutic or similar materiala. Aluminiumclividinl Itripl when used should 'ave a protective coatiDg of bitwnen.The thickDea of Itrl{» Ihall noC be leal than 1-5 mm and width not leathaD 25 mm tor ftoonnl_

5. DBIIGN CONSmBRATlONI

5.1 The terrazzo fiDiah normally conai.taof the toPpinl and an underlayeraad ia laid over a layer or bale concrete or cushiomnglayer. The arrange­ment of the various layer. for terrazzo finish laid directly over ground.hall be u shoWn in Fig. I and when laic! on a structural alab, the arrange­ment shall be as shown in Fil- 2. The sub-base shall be a well consolidatedlayer or earth or preferablysand. The cushioning layer .haJI prererabJ:'be lime eenerete, The base concrete shall lie lean cement concrete or mix1:5:10 or lime concrete.

TERRAZ~O TOPPING

UNDERLAYER

BASE CONCRETE

Fla. I TaRRAzzo FINISHOva. GaOUND

TERRAZZO TOPPING

UNDERLAYER

CUSHIONING LAYER

• : t ~ •••'. !~ I, to

II ." • • .'. .. • ':....... ... . .STRUCTURAL SLAB

FlO. 2 TaRaAzzo FINISH ONSTRUCTURAL SLAB

5.2 ThleD••• - The thickness of base concrete shall be not less than100 mm and of cushioning layer not Jess than 75 mm. The combinedthickness of the under layer and topping for ftooring and dado/skirtingshall be not less than 30 and 20 nun respectively. The thickness of terrazzo

·Speclfication Cor whate Ponland cement (fi',' "'IINII ).tCOde of practaco tor plain aDd reinforced (oneret, ( ,hi,d,_n.,. ).

II. 211t • lilt

to~inl Iball be not lea than the following dependinl upon the size ofchlpl used:

Sit"q/e." M.... TAUbwDUD nun

1to 2}2 to44to77 to 10

6

912

One and one-half

ProJlllrlU,II ofA"",,,,, ofBirul" Afi%Parts

One and three-fourth

5.2.1 Where chipa of Ibe larBer than 10mm are used, the minimumthicknesl of toppinl shall be not leu than one and one-third times themaximum size of the chipl.

5.3 .........u .... MIa Pl'OpOrdoa.

5.3.1 The under layer shall be or cement concrete of mix I : 2 : 4 byvolume. The maximum .ize of aClrepte used ,hall not exceed 10 mm.

5.3.2 The mix for terrazzo tOpPinl shall consist of cement \vith orwithout pigmentl, marble ~der, marble al.regatel, and water. Theproportions of cement and marble powder shall be 3 parts of cement andone ~rt or powder by m.... For every part of cement marble' powdermix, the proportion of aSBrega tel by volume shall be as {oUows dependinglpon the lize or aggregate.:

Si~, q/ A"",.,mID

1 to 7

7 to 15115 to 25J

5.3.3 The ,ggregates may be of the required colour or may be a mixof agregatea or ditrerent colours in the required pro~rtionl. The pro­portions of cement shall be inclusive 01 any piaments added to cement:

5.3.~ The proportions ill which pigments are mixed with cement orwhite cement to obtain different colouR for the binder shall be al specifiedin Table I.

5.4 P...._tlo• • 1 Cncb .. ,.",'111 Tenu.. l100r - While layingthe Roor the joints in ftoorinl _hall alway. coincide with the expansionjoints. if any, in the structural slab so that any movement of the basewin be in the joints in the flooring instead of forming uncontrolledcracks.

IS. 2114·1_

5.4.1 Si,c, of TmQUD Pall,l - Differential shrinkage or expansionbetween terrazzo and the mb-Iloor may cause cracks in the n'K>rinK andfloor joints shall be formed so that the positions of such cracks are control..led. The floor, both while laying the under layer and later on the topping,shall be divided into ~nel. not exceeding 2 m l so as to'reduce the nsk ofcracking. The joints shall be 10 located that the longer dimension of anypanel doe. not exceed 2 m, The panel shall preferably be separated bymeans of dividing strips. However. where butt joints are provided, the hays.hall be laid alternately allowing for an interval of at least 24 h between theJaying or adjact=tnt bay••

TABLE I CEMENT PIGMENT PROPORTIONS FOR VARIOUSCOLOURS OP MATRIX IN TERRAZZO WORK

( CICN", 4.4 ."J 5.:~.4 )

( Allllropordolll shall tIC by ,,,au. )

Cnr.nu" Pl(1)1RN,. TO 88 UaZD Pl\OrORTlnN Pn('pallTfONOP PJOXI(r;T (II' C'.F.MT

(I) (2) (3) ( j)

Red Red oxido oCiron ( '" 2 or S of 15 to 20IS : 44-1969- )

Black Carbon black (III IS : 40· 25 to 401971t)

Bottle Green chromium oxide ( SII 15 to 30Green IS : 54-1975~ )

Pink Red oxide (,,, 2 or 3 or IS : nil4-1-1969· ) •

Cream YoIIow oxido of iroD ( s"" of nilIS : 44-1969. )

Yellow Yellow oxide or iron (J" .. of nilIS : 44-1979* )

Li~ht Gret'Dchromium oxide ( ", IS r nilre~D 54-1975t)

Frencb nil I to 2Grey

Fawn Yellow oxide or irt·n (I" t of 6IS : "4-1969- )

P't( P(U'TION of\\'111'114 CJX.:NT

(5)

nil

nil

nil

100 to 300

100 to 400

25 to 75

50 to 150

·Speci&catioR for iroD ozide pi,meatl ror paints ('prl' ,,,i,;.,. ).tSpecification for carbon black for paint. (fir" "I/;S;'II ).~Speciftcatioft for Breen oxide of chromium for paints (fi, II "".J;O,' ).

7

II. 211t.19M

6. PROGRAMMING OF THE WORK IN RELATION TO FLOORI'INISH

6.1 In preparing the time schedule. due attention shall be given to provideaufficient time for:

a) the completion of all preliminary operations such as laying orservices, affectingthe schedule or commencement and completionof the flooring work, and

b) the hardening of any concrete in the base before laying of thefloor finish.

6.2 All the inside walls, ceiling and outside walls shall be plastered anddoor frames and windows fixed in place. All heavy work in the room shallbe completed.

63 The base concrete shall be finished to a reasonably true planesurface and to a level which is lower than the level of the finishedfloor by the depth specified for the thickness of the terrazzo flooring.

8.4 Before the floor finish work is started, all points of level for the finishedsurface shall be marked out. Whenever slope in finished floors is desiredpoints of level and outlets shall be correctly marked and outlet openingsmade before hand.

8.5 Wherever it is suspected that dampness or water may find way to betop of the base concrete in the course of usage of floor the base concreteshall be laid in two layers, each not less than 75 mm thick with a layer ofwaterproof membrane inserted between them. The waterproofing shall becontinued to a height of at least 150 mm along the side walls.

7. PREPARATORY WORK

7.1 BaadUDlaaci Storale 01 Material. - Clean, dry storage shall beprovided at the site for all the materials in accordance with the pro­visions of the relevant Indian Standards. Cement shall not be stored inthe open.

7.2 MbJal 01 Material.

7.2.1 The mixing of materials is of the greatest importance, for if thisis not done thoroughly the work will not have a uniform appearance. Ifdone manually the mixing shall preferably be done in a trough or tub.With a view to avoid variation in colour the complete quantitites ofcement and pigment required for one operation shall be mixed at thebeginning of work and stored properly.

7.2.2 Where different coloured chips are used they shall first be wellmixed in required pi0POI tions of various colours and sizes.

8

111211~ .1_

7.2.2.1 Coloured cement may be procured as ready mixed materialor mixed in site; in the latter case the pigment and cement in the requiredproportions shall be mixed thoroughly and sieved before further mixing.with marble powder and aggregates.

7.2.2.2 The coloured cement ahall be mixed thoroughly in dry statewith marble powder. The binder 10 obtained and the mix of chips shallthen be mixed dry together ( Proportions given in 5.3.2 ).

7.2.23 While mixing the aggregates, care shall be taken not to getthe materials into a heap, as this would result in the coarsest chips fallingto the edge 0 f the heap and the cement working to the centre at thebottom. The material shall be kept, u far al possible, in an even layerduring mixing.

7.2.3 After the materials have been thoro~hly mixed in the dry statewater shall be added in small quantities. pr~ferably in a fine spray, whilethe materials are being mixed until proper consistency is obtained. Themixture shall be plastic but not so wet that it will flow; a rough indicationfor the addition of proper quantity of water in the mix is that it shall becapable of being moulded when squeezed in hand without water flowingout. A high water cement ratio will produce a mixture with a high dryshrinkage.

7.2.4 Machine mixing may prefetably be used but the common type ofconcrete mixer is not as suitable for terrazzo work as I the mixer speciallymade for this purpose, in which segregation is prevented by blades with alifting as well as rotating movement, Only constant work justifies theinstallation of such special machines.

7.2.5 The mix shall be used in the work within half an hour of theaddition of water during preparation.

8. SPREADING THE UNDER LAYER

8.1 Dividing strips including the strips required for decorative design shallbe fixed on the base to the exact surface level of floor so as to divide thesurface of the base into the required arrangement of panels. Anchoragearrangements shall be provided either by fixing 40 mm long cross nailsthrough the strips or by cutting the edges as mentioned in f.6.

8.2 Where dividing strips are not used, the screed strips shall be fixed onthe base, properly levelled to the correct height to suit the thickness orfloor.

8.3 Before spreading the under layer, the base shall be cleaned of all dirt.laitance, or loose material and then well wetted with water without Corm­ing any water pools on the surface. It shall then be smeared with cementslurry just before the spreading of under layer.

9

IS I 211~ -:1984

..... After application of cement slurry, the under layer shaD be spread andlevelled with a screeding board. The .tightly rough surface left by theacreeding board will Corm a satisfactorykey for the terrazzo.

9. LAnNG TERRAZZO TOPPING

9.1 Terrazzo toppinglhall be laid while the under layer is still plastic butit hu hardened sufficiently to prevent cement from riling to the sureace;this is normally achieved between 18 to 24 h after the under layer hal beenlaid. A cement slurry, preferably of the same colour as the topping shallbe brushed on the surface immediately before laying is commenced. Ifpossible, the entire work of laying the topping shall be completed at onestretch (I" 7.2.1 ).

1.2 The terrazzo mix shall be placed on the screed bed and compactedthoroughly by tamping or rolling and trowelled smooth. The time intervalallowed between each successive trowelling is important as only that muchtrowelling which is just sufficient to give a level surface is needed immedia­tely after layer. Futher compacting shall be carried out at intervals, theamount depending upon the temperature and rate or set of the cement.Excessive trowelling or rolling in early stages ~hall be avoided as this tendsto work up cement to the surface producing a finish liable to cracking andalso necessitates more grinding of surface to expose the marble chips.

9.3 The surface shall then be rammed in order to consolidate the terrazeo;it is not sufficient iust to 'float' lightly, as this would cause depressionswhich have to be filled with mortar. A piece of smooth marble stone ofsize 150 mm x 150 rom X 25 mm may be advantageously used for ramming.Following the rammer a trowel may be used. When using the trowel theobject should be to make the surface level and smooth with as little use ofthe float a~ possible relying upon pressure rather than upon a trowellingaction to achieve this end. Rolling will be easier than tamping and patt­ing but a rolled terrazzo is more likely to crack since the roller woulddraw the cement to the surface unless the mixture is very dry. Thebest results are obtained by tamping combined with a minimum or tro­welling. The compaction shall ensure that air bubbles are cleared fromthe mix.

9.4 Work oa Border..... Decorative Onl.- - Borders and decora­tive designs shall be laid before the main body of the floorinp. They shallbe laid and finished in the same manner as flooring, preferably usingdividing strips. Where, however, stencils or Cormwork of wood or metalare used instead of dividing strips they shall be removed before the toppingmix commences to harden. The removal shall be effected with as littledisturbance to the materials as possible and any ragged edges left afterremovaJ of the stencils or rorrnwork shaJl be rectified with a trowel, carebeing taken to consolidate the terrazzo to avoid damage to the edges 01the design.

(0

1_ I 2114 • 19~

10. Q11RING

11.1 The surface shall be left dry lilr air-curing for a duration of 12 to IShdepending upon atmOlpberic temperature conditions. It shall then be curedby aUowing water to stand in pools over it for a period of not less than...day•. Prt.-cautioDs shall also tie tak~n to prevent the floorfrom being sub­jected t6 e::treme temperature.

11. GRINDING

11.1 The grinding and processing or terrazzo may be commenced not leuthan 2 day. from tile time of completion of laying for manual grinding andDot leu than 7 day. for machine grinding.. The period that should beallowed before the floor is fit for grinding depends upon the materials,their proportions and the weather. The sooner the grinding is done theeasier it Ilj if it i. done too lOOn the grindin8 may tear out the chips fromthe matrix.

11.2 The fiDing shall be done with a grout using the same coloured cement( without marble powder ) as in the original mix COl' left ilZZO topping anda portion of tbe coloured cement shall be kept for this purpose when thefloor is laid; this ensures that patches do not aiac:r in appearance from theremainder of the floor. .

11.3 Grinding and polishing may be done either by band or by machine.The operations shall be as given in 11.3.1 to 11.3.8.

113.1 The first grinding shall be done with carborundum stones of 60grit aize.

11.3.2 The surface shall then be washed clean and grouted with neatcement of the same colour as matrix grout of crcamlikc consistency, Itshall then be allowed to dry for 24 h and wet-cured for 4 days in the samemanner as specified in 10.

11.3.3 The second grinding shall be done with carborundum stone of 80grit size.

11.3.t The surface shall then be prepared once more as in 11.3.2.

11.9.5 The third grinding shall be done with carborundum stone or 120to 150 grit size.

11.3.6 The surface shall again be washed clean and allowed to dry for12 11 and wet-cured for 4 days in the same manner as specified in 10.

11.3.7 The fourth grinding shall be done with carborundum stone of320 to 400 grit size.

11

II I 211t .1984

11.3.8 The surface shaU again be wuhed clean and rubbed hard withf~lt and slightly moistened oxalic acid powder and 5 g of oxalic acid pow­der is adequate Cor 1 ml of floor surface.

Il.f When all constructional and finishing works. namely, painting.distempering, electrical work, plumbing, joinery work. etc. are completedand just before the area is occupied the floor shall be washed cleanwith dilute oxalic acid solution and dried. Floor polishing machinefitted with felt or hessian bobs shall then be run over it until the floorshines.

11.4.1 In case wax-polished surface is desired, the wax-polish shall besparingly applied with soft linen on the clean and dry surface. Then thepolishing machine fitted with bobs shall be run over it. Clean. sawdustshall then be spread over the floor and polishing machine again appliedmopping up surplus wax and It;aving glossy surface. Care shall be takenthat the floor is not left IUp~.

12. LAYING TERRAZZO SKIRTINGS AND DADOES

12.1 UDder La,er - For terrazzo finish on vertical surfaces like skirtingsand dadoes, the under layer shall consist of a layer of stiff cement mortar1 : 3 (I cement: 3 sand) by volune, finished rough so as to provideadequate key for topping.

12.2 Thlcluae•• - The combined thickness of under layer and terrazzotopping shall not be less than 20 mm.

12.2.1 The minimum thickness tor terrazzo topping shall not be lessthan 6mm.

12.3 Other details regarding laying, curing, grinding, polishing and main­tenance shall be similar to those descri bed for in-situ terrazzo flooringexcept that the 'grinding will be done manually.

13. INSPECTION AND TESTING

13.1 The work should he inspected while in progress and after completion,special attention being paid to the following points:

a) General condition of the base;b) Correct level or base in relation to flooring;c) Suitability of aggregate;d) Correct proportioning of materials;e) Proper mixing;r) Adequate bond between wearing surface, under layer and the

base;g) Suitable size of bay;

12

1S,2114.1111

h) Correct level or dividing strips and the gradient of floor;j) Suflicient and correct cODlOlidation; andk) Correct curing.

14. MAINTENANCE14.1 Under normal conditions the flooring may be kept clean by washingperiodically with water and occasionally with a dilute solution of oxalicacid after which it shall be mopped down with cold water and dried. Ifdesired, the floor may be polished using a hard wax polish or an emulsionpolish•.

14.1.1 Soap in any form shall not be -used as it tends to make theterrazzo dangerously slippery; excessive polishing have a ~iTJJ:l~r

efFect. The surface may also be kept free from oil and grease ttl ~'I .uJlIipperinas.

13

BUREAU OFINDIAN STANDARDS

HNdq.,."..MM. Shav.", 8 e.hadur ShahZatarM_g, NEWDELHI 11 0002T.lephon••: 323 0131, 323 3375. 323 9402 Fax:+ 91 11 3234082, 3239398, 3239382E • mal': blslnd@ deI2.vsnl.net.ln Internet: http://wwwdel.vsnl.net.ln/bia.org

327215

723452

550 1348

8394955

3237817

3378882

603843

2352315

83292 95

TeIepho".

91·770032

5251 71

282808

323635

288588

403827

21 01 41

91·288801

91·71 1998

566508

3201084

3738 7a

216878

Road. 21 8923

C.nh'Lab",.,.,:PlotNo. 20/8,Site r.J, Sahlbabad Industrial Ar••, S8hlbllbad 201010

R.,Io".' Ottlc..:

Central: Manak Bh8VIU1, 9 Bahadur Shahlafar M~, NEWDELHI 110002

·Eastern: 1/14CITScheme VII,VJ.P. Road, IWakurgachl, CALCUTTA 700054

Northern: SeQ 335-336, Sector 34·A,CHANDIGARH 160022

Southern: O.l.T.Campus, IV Cro.. Road, OHENNAI600113

tW.tem: MaMkaIaya, ee, MIOC, BehInd Marol Telephone Exchange.Andherl (East),MUMBAI400093

Branch Ollie..:

'Puahpak', Nurmohamed Shaikh Marg, Khanpur. AHMEDABAD 380001

*PeenyalndustrialAre.. 1st Stag., Bangalore-Tumkur Road,BANGALORE 560058

Commerclal-cum-Offtc:e Complex. Opp. Dusher. Maidan, Areta Colony,BittanMarket, BHOPAL 4620180

82/83,GangaNagar,UnitVI, BHUBANESHWAR 751001

KalalKathlrBuilding, 870Av'nashl Road, COlMBATORE 641037

Plot No. 43, Sector 16 A, Mathur. Road, FARIDABAD 121001

S.vltrI Complex. 116G.T.Road, GHAZIABAO 201001

53/5Ward No.29,R.G.Baru. Road, 5th By-Illfte, GUWAHATl781003

5-8-58C, L.~. Gupta Marg, NampallyStationRoM. HYOERABAD 500001

E-52.ChitaranJan Marg, C· Scheme, JAIPUR 302001

117/418B, Sriodaya Nagar.KANPUR 208005

Seth Shawsn, 2nd Floor, Behind L... Cinema, Naval t<lshor.LUCKNOW 228005

NIT Building, Second Roor,Gokulpat Market, NAGPUR 440010

Patllputra Industrial Estate, PATNA800013

Institution of Engineers (India)Building 1332ShivajlNagar, PUNE411005

~ahajanand House'3rdFloor, Bhllldlnag8I' CIrcle, 80FeetRoad,RAJKOT 360002

T.e. No. 14/1421, UnIYet'Sily P.O.Palayam, lHlRWANANlHAPURAM 895034

*8••• Office is at 5 Chowrfngh..Approch, P.O.PrlncepStreet,CALCUTTA 700072

tSaies OfficeIsat Nowtty Chambers, GrMt Ro.t, MUMBAI 400007

*8.... OfflceI. at ep Block, UnityBuilding, N...hlmaraJa Squar••BANGALORE 560002

271085

3096528

2223971

Printedat : PrabhII01'" p,.., NewDeti·2