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”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 12027 (1987): silicone-based water repellents [CED 41:Waterproofing and Damp-Proofing]

IS : 12027 - 1987

Indian Standard

Reaffirmed 2008

SPECIFICATION FOR

Gr 3

SILICONE-BASED WATER REPELLENTS

(First Reprint OCTOBER 1997)

UDC 691.175.842: 699.82

© Copyrigt 1987

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

October 1987

IS : 12027 • 1987

Indian StandardSPECIFICATION FOR

SILICONE-BASED WATER REPELLENTS

Waterproofing and Damp-proofing Sectional Committee, BD(~ 41

Ch4irm4nPRO'" M. S. SR'F.1""Y

RepreslnlinlMiniatry or Defence ( Engineer-in.ChieC's Branch)

Fertiliaer (Planning and Development ) IndiaLimited, Dhanbad

Indian oil Corporation Ltd, BombayRoof Water proofing Company, CalcuttaBharat Petroleum Corporation Ltd) Bombay

Mtm6",L'r-CoL V. K. KANITK ,1\ (AII""att to

Prof M. S. Shettv )SnRI R. C. ARORA' Hiadustan Petroleum Corporation Ltd, BombaySHRI S. S. CHAN1l0K Central PUblic Works Department, New Delhi

SURVEYOR ov WORKS ( NZ ) ( Allernate) •SRRI T. CHOUDHURY National Test Houle, CalcuttaSURI D. S. GBUMIIAN Roofrite Private Limited, New Delhi

SURI K. K. L.~L ( Alt"ntd, )SHal A. D. GUPT'

S8ftl S. S. DAB GUPTASHRI M. S. GUPTA8KHI S. N. DUTTA. GUPTA

SHRI A. D. NAYAK (1I11""al,)SDKI S. K.JAIlf Hoechst Dyed and Chemicals Ltd, Bombay

SHRI K. A. T. VARGHESE ( Allernat, )SHRI M. B.JAYWAN'l' Synthetic Alphalts, BombavSHRI S. K. KARAMCBANllANI Union Carbide India Ltd, Calcutta

SRRI V. NIJHAVAN ( Allerna', )SHRI M. R. MALYA

Stun S. P. MODIDR MetRD AlLAM

SIIBI A. G. POL

In personal capacity (Flat No.3. Panomma,..10 Pali Hall Road. Bombay 400005 )

Engineers India Limited, Nt-w Dt"lhiCentral Burldinq Research Institute (CSIR),

RoorkeePublic Works Department, Government of

Maharashtra, BombavSKBt R. P. PUMtI Llovd Bitumen Products, Calcutta

SHftl M. M. MATHAI ( Alt,,"tJle)SRRI T. K. Roy Shalimar Tar Products ( 1'lg.1) Ltd, Calcurta

SURI B. K. BHATTACHARYA ( Al",nat,)

(C.,,'.nu,tI 011 fjtJf' 2 )

C eo""i,}" 1987BURJ:AU OF INDIAN STANDARDS

Thia publicacion i. protected under the Intlia" C.p.1",ht Ac' ( XIV of 1957) andreproduction ill whole or in pan by any mt'ana except with written permislion or thepublisher ,ball be deemed to be an inrriDI~ment of copyright ulld~r the said Act.

IS : 12027 • 1987

(C.n,;",.,d from !Jag, 1 )

M,",/urs R""s.",i",SRal A. S.lf GUPTA Miniltry of Railwa\'s, Calcutta8••108 DRPUTY CUIE.. ENClIN)t~ER Public Works Department, Government of

( BUILDING) Tamil Nadu, MadrasSU.S.INT.NDINO ENGINBBB,

DBalOlf Cl ROLE ( A11"ntlt' )CAP A••OK SSA.TRY Oasar Chemical Pvt Ltd, Bombay

SRRI S. K. BAlfBR.TJUe (Alt"".,,)SBBI A. SR.lBI... FGP Limited, Bombay

5sal G. K. TAKIAB (Al'"nal,)IBBI Y. S. SRINIYASAN National BuiJdiols Or.anizatioD, New Delhi

S••I SUABHI KANT (AII,rnal')PRO.. C. G. SWAX1JfATHAM Central Road Research Institute \ CSIR ),

New DelhiSKRI Y. G. GOKB.lJ"lI ( AII,rn.',)

S8.1 G. RAMAIf, • Director General, BIS ( EJf-"jfieio M,mb,r)Director ( Ci., Enlt )

S"",•...,SHRI M. SADASIVAM

A.i,tant Director ( Civ EnSS ). DIS

2

AMENDMENT NO. 1 JANUARY 2001TO

IS 12027: 1987 SPEl:IFICATION FOR SILICONE·BASED WATER REPELLENTS

(Page 7. Appendix A) - Substitute tbe following for the existing nlat1er

'A·l For the purpose of carrying out the tests detailed in Appendices B lOOt lheminimum nunlber of samples of bricks Ind stone required Ire as follows:

I) For Class A materials, OR5S A bricks with water absorption not mOle

than 15 percent confomling to IS t(l71 and

b) For Class Bind C materials, Limestone slab conforming to IS 1128 orClass B bricks confonning to IS 1077.'

(CED41 )RePl'OIraph, Unit,81S, NewDelhi, ladia

IS : 12027 • 1987

Indian StandardSPECIFICATION FOR

SILICONE-BASED WATER REPELLENTS

o. FO R E W 0 R 0

0.1 This Indian Standard was adopted hy the Bureau of IndianStandards on 21 .April 1987, after the draft finalized by theWaterproofing and Damp-proofing Sectional Committee had heenapproved hy the Civil Engineering Division Council.

0.2 Silicone-based water repellents, when applied to masonry surfaces,generally extend their life and protect them from spalling, cracking,efflorescence and other types of damages caused by absorption ofwater. It may, however, be mentioned that their use for water-

/proofing of roofs, tanks, etc, is not recommended. Silicones function hyimparting durable water repellent film on the surface of capillary poresof the masonry to a depth of about I' 5 to 3·0 rom depending upon theporosity of the masonry surface. Silicone films do not seal the pores ofcracks on the masonry and the permeability of masonry to vapour andgases is not seriously impaired for performance tests. This standard isintended to specify the requirements and give guidance to the users forthe selection of the appropriate type of wnt er repellent for applicationto various types of masonry.

0.3 In the formulation of this standard, due weight age has been givento international coordin.uion among the standards and praci iccsprevailing in different countries in addition to relating it to the pract icein the field in this country.

0.3 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 he rounded on' inaccordance with IS: 2-1960·. The number of significant placesretained in the rounded off value should he the same as that of' t hespecified value in this standard.

1. SCOPE

1.1 This standard prescribes the requirr-nu-nr- f'.)r silicone-based waterrepellents,

·Rulft8 for rounding nfTnumerical valu(,1 ~ 'tl';5,ti)

3

IS : 12027 • 1987

1.1.1 These water repcllen t~ can be applied to masonry ~(\nerally freefrom cracks exceeding 0"10 nun in width, to confer wuu-r repellencywithout appreciable chanu« of (loInur or appea runce ot hr-r than t hntimpa r t ed hv fuuit ive dyr-.

2. TERMINOLOGY

2.0 For the purpose of I his ~t andarcl, t he followinu dcfiuit ions shallapply.

2.1 Silicones - A material \'\ hich cont ainv viliconc-oxygcn-siliconr­links and also hydrocarbon g-I'OUP~ at taclu-d directly to the vilicone,

2.2 Silicone Formulation - J\ silicone solution in a volat ir solvent oran aqueous cmulvion, 1he non-volar ill" content of both consisting mainlyor vilicon: ~.

2.3 Aqueous Siliconate Solution -- ..\n aqueous solut ion of an alkalimer al salt of silicone, th» non-volat ill' rnnl ont nf which r()n~i,. <; mainlyof vilicone.

3. CLASSIFICATION

3.1 Silicone repellents may he classified in t lu e~ cat egoriov based ontheir per Ior mance test (~cr Not o-, \ anrl 2) ;I' meruionodin 3.1.1, 3.1.2 and 3.1.3

NOTE 1 - Some sillcone t('p~lIf III may meet the h'st requirements of bod.Class A and Class n materials and may bp marked accordinglv

No'rE 2 - Wh.'re rhe l} p~ of SUI f"u.1" to br- treated cannot b« idenrifi. d L.labs 1\repellent shou Id be used,

3.1.1 Class A - Silicone formulations for clay bl irkw ork, hydrauliccement-based m.uei ials, and nat ural and cast vtrme masonai y of apredominantly siliceous nature.

3.1.2 Class B - Silicone formula t ion') for nat ural and Ctl~t stonemasonai y of a predominantly calcaroouv nature' and calcium -ilicatobrick-wor k.

3.1.3 t:lnss C>« Aqueous silicon.u e solution lrn nat m al and cast stonemasonary of a predominant Iy calca rcou- nat nrc.

4. CONSISTENCY

4.1 The war er repellent shall hr of such con-istoncy t hat it can hereadily ~t)Jplic'lblc to masonai y by lu ,,~lling nt ~pt avmg , \'"ht'n

IS : 12027 - 1987

applied, it shall not substantially change the dry appearance of thetreated surface from that of the untreated surface, apart from theeffect of any fugitive dye.

5. PERFORMANCE REQ,UIRI..MENTS

5.1 Silicone based water repellents shall comply with the testrequirements specified in 5.2 to 5.6. The tests shall be carried out onthe appropriate substrates specified in Appendix A. Samples for testingshall be taken in aCCOl dance with 6.

5.2 Early Water Repellency - When the water repelIent has beenapplied as descriled in Appendix n and the test described inAppendix (~ has been carrir-d out, the water repellency shall be suchthat no pool orwater shall he completely nbsorbed within 10 minutes,

5.3 Absorption of Water - The relative absorption of water throughtreated and untreated faces when determined by the method describedin Appendix )) shall not be 11101 ethan 10 percent for anyone of threetest specimens.

5.4 EvaporatioD of Water - The avaporat ion ratio of water ,.~

determined in Appendix E shall be not less than 10 percent.

5.5 Durability

5.5.1 Clas..\ .1 l?(JjJclleIlIJ - \\7h~~ 1he water repellent is t~st('d a~

described in Appendix F, it shall meet the requ rrernentsof 5.2, 5.3 ,\1\<1 5.4 after a period of 12 month" weat hering,

5.5.2 Class Band C Repellents - When the water repellent is tested a~

described in Appendix <.}, it shall meet the requirementsof 5.2, 5.3 and 5.4 after a period of 12 months weathering,

NOT. - It is intended that this test should be carried OUI only once 08 each newformulation or .iliconf'-but'd water repellent. It is both unneceslary andimpracticable to use the telt al • routine check.

6. SAMPLING

6.1 After thorough shaking of the containers, approximately equalsamples totalling not less than 600 g in weight, shall be taken atrandom from not less shan 1 in 20 of the original and previouslyunopened containers. The samples shall be thoroughly mixed togetherand then divided into triplicate samples, each weighing not lessthan 200 g. These latter samples shall be placed in clean, dry, airtightcontainers of such size that they are nearly filled by the sample. Each

5

IS I 12027 • 1987

container shall be sealed and marked with full details and the date ofsampling.

6.2 For Class A and B materials, solvent resistant containers shall beused. If metal containers are used, the same shall be free from leadand even lead solders shall not be used for soldering.

6.3 For Class C materials, glass, polyethylene, mild steel, stainless steeland other materials resistant to caustic soda should be used.

7. PACKING AND MARKING

7.1 Paell'DI- The materials, if in bulk, shall be packed in steeldrums. Fo~)assA and B materials, other solvent resistant containersfree from lead and lead-solder shall be used. For Class C materials,polyethylene containers shall he used.

7.1.1 The package shall be securely closed and legibly and indeliblymarked with the following information:

a) The class of repellent - Class A, B and (~;

h) Name of the manufacturer;

c) Weight of the material in the package;

0) Recognized trade-mark, if any;

e) Date, month and year of manufacture;

f) The appropriate flammability mark, if the flash-point isbelow 23°C;

R) Self-life and storage requirements; and

h) Solids contents.

7.2 The packages may also be marked with the Standard Mark.

NOT. - The ule of the Standard Mark it loverned by the proviaiou 01 tb.Bureau or Indian Standardl Act 198ti and the Rul. and Repl.tionl madethereunder. The Standard Mark on productl covered by an IndiaD 8taadardcODvey. the ..urance that they have been produced to comply witb tb.requirement. of that standard under a well-defined IYltem or iDtpeCtiOD, teatm. aadquality control which i. devised and Iupervileel by BIS and opented by tbe producer.5taad.reI marked product. are allO cODtinuoUlI, cbecked by BIS for conformityto tbac .tand.rd ... further .ar~IU.rd. Detail. of coaditiODl uDder which. lie_c.Cor tb. u.. of the Standard Mark may be lrallted to manuf.cturen or producenma, be obtain..d rrom the Bureau of Indian Standard••

IS I 12027 • 1987

APPENDIX A

( Clause 5.1 )

BRICK AND STONE SAMPLES

A-I. For the purpose of carrying out the tests detailed in Appendices Bto G t the minimum number of samples of brick and stone required areas follows:

a) Class A materials(Appendices 0, D, Eand F)

b) Class Band Cmaterials ( AppendicesC, D, E and G)

Class A bricks with water absorptionnot less than 15 percent conform­inR to IS : 1077-1976*

Limestone slabs conforming toIS: 1128-1974t

APPENDIX B

i Clause 5.2)

SELECTION AND PREPARATION OF TEST SPECIMENFOR USE IN THE TESTS DETAILED IN

APPENDICES 0, D, E, F AND G

B-1. CLASS A REPELLENTS

B-1.1 Select 7 bricks free from cracks wider than 0·15 mm and fromother imperfections on one nominal 190 X 90 mm face (the 'test face' ).

B-2. CLASS BAND C REPELLENTS

8-2.1 Select 7 limestone slabs each 150 mm x 150 mm X 25 mm in sizewith a tolerance of ± O·5 cm on each dimension and free from cracksand imperfections on one 150 mm and 25 mm face (the 'test face'). Ifthere is a visible conrinuous calcite vein in any slab the face selected fortest shall be, as near as possible at right angles to such vein. The faceopposite the 'test face' should be numbered so as to make the face to hetreated, easily identifiable•

• Specificadon lor commOD burnt clay buildin, brick. ('hir~",,;slin ).tSpeclftcatioD for llmestone ( Ilab and tiles) (~'" ,,';,ioa).

t

IS : 12027 • 1987

B-3. DRYING

B-3.1 Dry the selected specimens for 72 hours at 50 ± 2cC in awell-ventilated oven and allow to cool to room temperature over aperiod of 24 hours either in the oven or on a wire rack in a dryairt ight container.

For the purpose of Appendix E, 3 bricks and 3 blocks should.after drying, be set aside unt reared.

8-3.2 Preparation or Test SolutioD - When the silicone waterrepellents are supplied in concentrated form, it should be diluted inthe following manner:

a) Class A and B MafprialJ

Test solution should be prepared hy simply diluting- t he siliconewater repellent with mineral spirit or xylene. The mineralspirit should conform to the following specifications:

i) Minimum Hash-point

ii) Boiling Range

iii) Minimum Kauri-butanol value

27°C

135 to lR~O(~

34

b) Class C Materials

The test solution should hp prepared hy diluting rhosilicone-base~ water repellent with distilled water.

B-3.2.1 Concentration of Test Solution -_. The concentration of t ho 'l'Stsolution shall be as follows:

For Class A and Class B Materials

For Class C Material

B-4. TREATMENT

5 ± 0·2 percent solids

::I ± 0·2 percent solids

B-4.1 The remaining specimens are then treated in preparation for thetests described in Appendices C, D, E, F and G. Treatment is carriedout in a shallow tray approximately 350 x 150 X 25 mm and the test

I solution is poured to a depth of approximately 10 mm,

8-4.2 The tray may be made of polyethylene which is not attached bythe silicone solution; if metal containers are used, the same should befree from lead and in case of Class C material, the metal should beresistant to caustic soda solution. A layer of wire gauze or othersimilar separating medium) which is not attached by the silicone

8

IS : 12027 • 1987

solution used, should be laid on the bottom of the tray in order toavoid inadequate treatment due to contact between the specimen andthe bottom of the tray.

The tray is then placed on a balance weighing accurately 0·1 gand its mass with the solution noted. Each test specimen is then placedsingly, with the selected test face downwards, in the tray for 15 seconds,removed, and held with the treated face downwards for a further10 seconds to allow drairiing hack into the tray. It is then placedtreated face uppermost and stored indoors at a temperatureof 25 ± 5°C. Immediately after the removal of the specimen anddraining, the mass of the tray and the solution is recorded and theamount of solution absorbed by the specimen is determined bydifference to the nearest 0-1 g.

The solution in the tray is made up to approximately the originaldepth with further water repellent before the next specimen is treated.

B-4.3 If solution pick-up of any brick is less than 4 g or of any block isless than 1 g, the specimen shall be discarded and not used in thesubsequent tests. If all bricks and blocks meet these minimum pick-uprequirements, then they may be used, as appropriate, in the tests.

APPENDIX C( Clause 5.2)

METHOD OF TESTING EARLY WATER REPELLENCY

c-i, CLASS A MATERIALS

0-1.1 Use 3 treated bricks prepared according to Appendix B.

0-2. CLASS BAND C MATERIALS

0-2.1 Use 3 treated slabs prepared according to Appendix B.

C-3. PROCEDURE

0-3.1 Place the specimens, 3 days after the treatment, on a level benchwith the treated faces upwards. Discharge 3 separate pools, eachof 1 ml of distilled or de-ionized water, onto the test face of eachspecimen from a burette, the tip of which almost touches the surface.The pools shall be observed after 10 minutes, and then removed hyblotting with filter paper.

9

IS I 12027 • 1987

APPENDIX D( Clause 5.3 )

0-1. METHOD OF MEASURING AND ABSORPTION OFWATER

D-l.1 The' 3 bricks or slabs used for t he test in Appendix C shall thenhe stored in a dry air-tight container at 27 ± 2°(~ for a furl her 11 daysand shall then bf' \vf'igh('d to tho nearest 1 g and r('cordpcJ a 1, hi,and cl,

D-l.2 They shall hf' placed, t reared face' downwards on n pad ofabsorbent cotton \\"001 in a trav to which clean water maiuta incdat 25 ± 2°(~ is then added so ~thal the water level is maintainedat ± 3 mm of the treated face. Care should he taken to ensure thatthe specimens are neither touching each other nor the sides of the tray.Water shall be added from time to time to maintain the level; coveringthe tray with a polyihcnc sheet helps to cut down loss by evaporation.The specimens shall be removed 7 days later and adher-ing waterremoved by shaking and blotting quickly with sa suitable filter paper.The specimens shall be weighed again, each to the nearest 1 ~ andrecorded a2, 1>2 and c2.

0-1.3 The specimens shall then he inverted and placed in the tray wii hthe treated face uppermost for 72 hours and aft or removing &111adhcring water in the manner described above, the weight again berecorded to 1he nearest 1 ~ as a3, 1>3 and c3.

0-1.4 The relative absorption (in percent) shall be' calculatedaccording to the formulae:

_a~_~~ X 100. .E!---:jJ!- x 100 and .£2 - _c~ X 100fls - a I 'ha - hi (3 - Cl

0-1.5 Jf one or more of the specimens fails to meet the requirementsof 5.3, the 'test shall be repeated on three fresh specimens. Should anyone of these new specimens fail to comply with the requirementsof 5.3, the consignment shall he deemed to have failed.

APPENDIX E(Clause 5.4)

METHOD OF MEASURING EVAPORATION OF WATERTHROUGH SURFACES

E·I. CLASS A MATERIALE-l.l After eft' rying out t 11(' tests detailed ill App~ncii~f'~ c: and D, the

In

IS : 12027 - 1987

three treated bricks shall be dried at 50 ± 2°0 for 72 hours in awell-ventilated oven and allowed to cool to room temperature overa 24 hour period either in the oven or on a wire rack in a dryair-tight container. These. together with the 3 untreated bricks, shallbe used for the test.

£·2. CLASS BAND C MATERIALS

E-2.1 After carrying out the tests detailed in Appendices C and D, thethree treated blocks shall be dried at 50 ± 2°0 for 72 hours in awell-ventilated oven and allowed to cool to room temperature overa 24 hour period either in the oven or on a wire rack in a dryair-tight container. These, together with the 3 untreated hlocks, shallhe used for the test.

E-3. PREPARATION OF SPECIMENS

E-3.1 Cut pieces of a suitable weatherproof impermeable and rigidmaterial, for example, glass to fit all the faces of each slab or brickwith the exception of the test face. Place the 6 bricks or slabs in a trayon wire gauze or other supporting medium with the test face upwardsand fill the tray to a depth of 10 mm with clean water topping up asnecessary to maintain the level. Remove the bricks or slabs after72 hours and immediately seal an faces other than the test face asfollows:

"Wipe away adhering water and seal plates of the rigid materialonto all faces other than the test face by applying silicone sealantto the edges of each face and pressing the material into contact.Sealant should also be built up around all edges. Weighimmediately and rapidly to within 1 g and then allow the bricksand slabs to stand freely exposed with the test faces upwards in awell-ventilated room for 7 days at 27 ± 2·C Re-weigh."

E-4. DETERMINATION OF RESULTS

E-4.1 If the loss of weight from the 3 treated bricks or slabs isWI, WI and Wa and from the untreated bricks or slabs is W., Wa andWI) the evaporation ratio ( percent) of water shall be expressed as:

11

18 I 12027 - 1987

APPENDIX F

( Clause S.5.1 )

F-l. DURABILITY TEST (CLASS A REPELLENTS)

P-l.1 Taking the 6 bricks used for carrying out the test in Appendix E,cut away the rigid material from one of the nominal 190 mm X 90 mmfaces of each brick. Ensure that there is a drip formed from thesilicone sealant around this face. Place the 6 bricks with this facedownwards on a shelf of gauge or other perforated material, atleast 300 mm above the ground; with the 'test face' of each brickfacing south in an external and unsheltered position.

P-l.2 After a period of 12 months exposure to weathering, repeat therests described in Appendices C, D and E.

APPENDIX G

( CIQUS~ 5.5.2 )

0-1. DURABILITY TEST (CLASS BAND C REPELLENTS)

G-1.1 Taking the 6 slabs used for carrying out the test in Appendix E,cut away the rigid material from one of the 150 mm ' 150 mm facesof each slab. Ensure that there is a drip formed from the siliconsealant around this face. Place the 6 slabs with this face downwardson a shelf of gauze or other perforated material, at least 300 mm abovethe ground, with the test face of each slab facing south in an externaland unsheltered position.

G-l.2 After a period of l~ months exposure to weathering, repeat thetests described in Appendices a, D and E. •

12

BUREAU OFINDIANSTANDARDS

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