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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.

!"#$% '(%)

!"# $ %& #' (")* &" +#,-.Satyanarayan Gangaram Pitroda

Invent a New India Using Knowledge

/0)"1 &2 324 #' 5 *)6Jawaharlal Nehru

Step Out From the Old to the New

7"#1&"8+9&"), 7:1&"8+9&")Mazdoor Kisan Shakti Sangathan

The Right to Information, The Right to Live

!"# %& ;

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Gr4

IS : 2386 ( PartII )- 1963(Reaffirmed 2011)

Indian Standard

METHODS OF TEST FORAGGREGATES FORCONCRETE

PART II ESTIMATION OF DELETERIOUS MATERIALSAND ORGANIC IMPURITIES

Eleventh Reprint SEPTEMBER 2006( Including AmendmentNo. I )

UDC 691.322: 543.86

Copyright 1963

B U R E A U O F I N D I A N S T A N D A R D S

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARGNEW DELHI110002

October 1963

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IS : 2386 ( Part D) 1M3Indian Standard

METHODS OF TEST FORAGGREGATES FOR CONCRETEPART II ESTIMATION OF L T RIOUS MATERIALSAND ORGANIC IMPURITI S

Cement and Concrete Sectional Committee, BDC 2

The Alsociated Cement -Companies Ltd, Bombay

RepresentingThe Concrete Asaociation of India, Bombay

s. B. Joahi Co Private Ltd BombayU. P. Government Cement Factory, ChurkDirectorate General of Supplies Diapo861a( Mini8try of Economic Defen08 Co-ordinat.ion )

haifmanSasl K. K: N ~ I

MemberSHBI K. V. TUADANBY( AllemaN toShri K. K. Nambiar)S S B I K. F. ANTIASBBIP.S.BHATNAOABDR I. C. Dos M. PAIS CUDDOU

SBat P. L. DAB ( A l . m o ~ )PBOI S. R. M B R A Central Road Research Inetitute (CSIR ),New DelhiBHBI N. H. MOBILE The Conorete Association of India, BombayBaBI S. N. MUKEBJ I Government Teat House, Caloutta

SHBI N. C. SEN GUPTA. Altemaee8 R B l EBACB A. NADIBSHAB Institution Engineers ( India). CalcuttaSsw C. B. PATEL National Buildings Organisation Ministry ofWorks, Housing Rehabilitation)

SSKI RABINDER SINOH A l t ~ m a t e )PROJ G. S. RAMASWAMY Central Building Research In8titute (CSIR),Roorkee

SSRI K_StVA PRASAD AZ ernat )

M. N. D tut Co Private Ltd, CalcuttaBbakra Dam Designs Directorate, New DelhiCentral Water Power Commission ( Miniltry ofIrrigation Power)SHBI Y. K. MURTHY ( AlumauSRal N. D. DArrABY Kbira Steel Works Private L td , BombayS I N., G. DEWAN Central Public Works DepartmentSUPBRINTENDING ENOINElI:a.

2ND BOLE ( Alum e )Da R. R. HATTIANOADISSBI V. N. PA l Alternate

S a B I P. C. HAZRA Geological Survey of India, CalcuttaJOINT DIREOTOR STAlJDABD8 Reeearch, Designs Standards Organization( B S ) ( Ministry of Railways)

A88IBTANT DIBEOTOB ST.AMD-ABD8 B S) Aleflmale )

SRBI S. B. J 8HISRBI M. M. LALS S B I B N M A J U K D A B

( Comtnued Oft I )

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARGNEW DELIII 110002

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IS : 2386 ( Part I I ) - 1963( O o n t i n u ~ d from p ge 1

Members R e p r ~ . t i n gSRRI T. N. S. RAO Gammon India Ltd , Bombay

SHR I S. R. PINHEIRO ( Alternate)RXPRtdU;N'.l 'ATIVE Mart in Burn Ltd, CalcuttaSURI NIHAR CHANDRA Roy Da.lrnia Cernerrt ( Bharat ) Ltd, CalcuttaSECRETARY Central Board of Irriga.tion Power (MiDiat,1 )' ofJ rrigation Power)BRIG G. S. SIROTA Engiueer-in-Chief''e Branch, Army Headquarten

S U B I R. S. M l H A N D R U A l t ~ r n a t e )TJa Bu. S U U D A R A J U India.n Reads Congress, New DelhiS B R I J. \ T R E H A N Hoads Wing, M inistry of Tra.nsport , Commu-nicat.ions

SHft 1 N. H. K J o ~ S W . N I ( Altt'rnate)DR H. C. VISVl' :SVARAYA. I)i .)('l,or, IHI (jJx-offirif) l.l mbtr)Deputy Direr-tor ( l d ~ ) S ~ c r e t J T Y

SHa l A. PRITHIVI R A JExtra. Assists .. t Director ( Bldg), lSIConcrete Subcommittee, nne 2 : 2

S.B .Joshi , Co Private Ltd, Bombay

Roads 'jng, Ministry of Transport Communications

c ~ o n v e n f rSHRJ S. Boo JOSHIMt mbcrsASSI8TANT DIRECTOR STANIlAROS( B S)S R I N. H. BIIAGWANANIDR I. C. Dos M. P A I S CUDDOU

PaOF G.S.RAMASWAMV

Research, Designa Standards Organization( Minist.ry of Railways )Engineer-in-Chief''n Brunch, Arrny HoadquartersCent.ral Wu,ter ; Power Comrnlaaion ( Ministry ofIrrigation Power)~ I U Y. K. l \ { U R T H Y ( Alternate )SUR' P. L. DAR Directorate General of Supplies Disposals( ~ f i n i 8 t r y of Economic Defence Co-ordination)SU I B. N. ~ I A , ) U M U A R ( Alternate

DIRBCTOR Engineering Research Laboratory , HyderabadSaRI V. N. GUNAJI MuhuruRhtra Public Works DepurtmeutSSRI M. A. H A F ~ E 7 . Nat.ional Buildmgs Organ isat.ion 1 \ [ i n i ~ t r y ofWorks, Housing Rehabil it.at.ion )

SaR I B. S. S t I l V A M U R T 1 Y (Alternate)SR I C. L. HANDA Central Wate, Power Commission (T\1inistry ofIrrigation Power)9f t U P. C. HAZRA Geological Survey of Ind ia, Calcutta.SURI K. K. NAMUIAR The Concrete Associat ion o f India , Bombay

SH I C. L. N. IYENGAR ( Alternate )DR M L. P U R l Central Road R e ~ - : o . r \ : h Inst.it.ute ( CSIR ),Now l)eihiCent ra l Building Research Irist.itute (CSIR),Roorkee

SRIH K. SIVA PR.ASAT> ( Alternate )SU I r. N. S. RAO G .J11D10n I nd ia L td , Bombay

SURI S. R. PINliEIRO ( Alternate )8 U P E B I N T E N l J 1 N G ENCI.N}}o;R. Central Public WInks Dopart.ment

2ND CIRCLESHRI O. P. GOEL ( Altr.rnate

S S R l J. M. T B E l I A NSSRI Roo P. S I K K A ( Alternate )S U R I H. T. Y A N Braithwaite Burn Jessop Construction Co Ltd,Calcutta

2

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MENOMNT NO 1 FEBRU RY 1983TO

IS:2386(Part 11)-1963 METHODS OF TEST FOR GGREG TlS FOR CONCRETEP RT II ESTIM TION OF DELETERIOUS M TERI LSN ORG NIC IMPURITIES

Al ter.at1 ?lt P P8 1 ZOU II 8.1) - Substitute the tolloviD,tor the existing clau8e:

6.1 Q bJ eet - This metbod tes t covers an appro%1mate method or estimating vbether organlQ compoundsare present in natural s nd in sutf ic ient quantit iesto be ~ l and hence 1s intended to show vhetberfurther teste are neces8ary or desirable.NOTE 1 - The tes t for determination of etfect oforganic impurit ies on mortar strength 18 covered yIS:2386(Part VI)-1963 'Method teet tor aggregateB

to r concrete:Part VI Measuring mortor maklr:g pro-p r t ~ s or t ine aggregates .

NOTE 2 - Harmless organic materials may causecolouratlon and cer ta in Datur Uly occurring organiccompounds do not c use colouratlon.

BDC 2)

Printed at : PrabhatOffset Press.New Delhi-2

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IS : 2316 Part II - 1963ndi n t nd rd

METHODS OF TEST FORAGGREGATES FOR CONCRETEP RT II ESTIM TION OF L T RIOUS M TERI LS

N ORG NIC IMPURITI S

FOREWOR0.1 This Indian Standard Part I I was adopted by the Indian Stan-dards Institution on 22 August 1963, after the draft finalized by theCement and Concrete Sectional Committee had been approved by theBuilding Division Council.0.2 One of the majo r contributing factors to the quality of concrete is thequality of aggregates used therein. The test methods given in thisstandard are intended to assist in assessing the quality of aggregates.In a given situation, for a particular aggregate, it may not be necessaryto assess al l the qualities and therefore it is necessary to determine before-hand the purpose for which a concrete: is being used and the quali tiesof the aggregate which require to be assessed. Accordingly, the relevanttest methods may be chosen from amongst the various tests covered inthis standard. For the convenience of the users the test methods are

~ r o u p into the following eight parts of Indian Standard Methods ofTest for Aggregates for Concrete IS : 2386-1963 :Part IPart IIPart IIIPart IVPart VPart \11Part VI IPart VIII

Particle Size and ShapeEstimation of Deleterious Materials and OrganicImpuritiesSpecific Gravity, Density, Voids, Absorption andBulkingMechanical PropertiesSoundnessMeasuring Mortar Making Properties of Fine AggregateAlkali Aggregate ReactivityPetrographic Examination

0.3 The Sectional Commit tee responsible for the preparation of thisstandard has taken into consideration the views of the concrete specialists.

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IS : 2316 Part II) - 1M3testing authorities, consumers and technologists and has related the standard to the practices followed in this country. Further the need forinternational co-ordination among standards prevailing in differentcountries of the world has also been recognised. These considerationsled the Sectional Committee to derive assistance from the publishedstandards and publications of the following organizations:

British Standards InstitutionAmerican Society for Testing and Materials

0.4 Wherever a reference to any Indian Standard appear,m these methods,it shall be taken as a reference to its latest version.0.5 For the purpose of deciding whether a particular requirement of thisstandard is complied with, the final value, observed or calculated, expressing the result of a test or analysis. shall be rounded off in accordancewith IS : 2-1960 Rules for Rounding Off Numerical Values Revised .The number of significant places retained in the rounded off value shouldbe the same as that of the specified value in this standard.0.6 This standard is intended chiefly to cover the technical provisionsrelating to testing ofaggregates for concrete, and it does not cover al l thenecessary provisions of a contract.

r SCOPE1.1 This standard Part covers the following tests for aggregatesfor concrete:

a) Determination of clay lumps,b Determination of clay, fine silt and fine dust sedimentation

method ,c Determination of light-weight pieces coal and lignite ,d Determination of soft particles, ande Estimation of organic impurities.

2. DETERMINATION OF CLAY LUMPS1.1 Object -1 his method of test covers the procedure for the approximate de te rmina tion of clay lumps in the routine examination ofaggregates.

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IS : 1386 Part U ) U632.2 Apparatus - The apparatus shan consist of the following:

a) alance - A balance or scale sensitive to within 0-1 percent ofthe weight of the sample to be weighed.b) Containers _. Containers of a size and shape that will permit thespreading of the sample on the bottom in a thin layer.c) Sieves - Sieves conforming to IS : 460-1962 Specification for TestSieves Revised ).

2.3 Sampling2.3.1 Samples shall be obtained by quartering or by the use of asampler from a representative sample se lected from the material to betested. They shall be handled in such a manner as to avoid breaking upclay lurnps which may be present.2.3.2 Samples shall be dried to constant weight at a temperature notexceeding 110C.2.3.3 Samples of fine aggregate shall consist of particles coarserthan 1 18 film IS Sieve and shall weigh not less than 100 g_2.3.4 Samples of coarse aggregate shall be separated into different sizes

using 475 nlm IO-rOITI 20 rnrn and 4O-mm IS Sieves. The weight of thesample for different sizes shall be not less than those indicated below:ize of Particles akingUp the Samples

mmOver 4-75 to 10

1 20 2 40 4

Weight ofample ng

I {20005000

2.3.5 In the case of mixtures of fine and coarse aggregates thematerial shall be separated into two sizes on 4-75-mm IS Sieve andthe samples of fine and coarse aggregates shall be prepared as describedunder 2.3.3 and 2.3.4-.4 Procedure - The sample shall be spread in a thin layer on thebottom of the container and examined for clay lumps. Any particles

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IS : D I Part D -1M3which can be broken into finely divided particles with the fingers, shall beclassified as clay lumps. After all discernible clay lumps have beenbroken the residue from the clay lumps shall be removed by the use ofsieves indicated below:

t

Size of Particle MakingUp the SampleFine aggregate retainedon 1-18-mm IS SieveOver 4-75 rom to 10 mm

10 mm to 20 mm 20 nun to 40 mm 40 DIm

Size ofSine for SievingResidueo flay umps8SO-micron236mm4-75 mm4-75 mm475 mm

2 5 CalclllatioD - The percentage of clay lumps shall be calculatedto the nearest 01 percent in accordance with the following formula:WL = ~ x lW

where = percentage of clay lumps

= weight of sample andR = weight of sample after removal of clay lumps.2.6 ReportlDlof Resll1ts - The percentage of clay lumps in the aggregateshall be reported to the nearest 01 percent.3. DETERMINATION OF CLAY, FINE SILT AND FINE DUSTSEDIMENTATION MEmOD3.1 Object - This is a gravimetric method for determining the clay finesilt and fine dust which includes particles up to 20 mircon. Differencesin the nature and density of materials or in the temperature at the t ime oftesting may vary the separation point.3.2 Apparatus - The apparatus shall consist of the following:

a A watertight screw-topped glass jar of dimensions similar to aI-kg fruit preserving jar.b A device for rotating the jar about its long axis with this axis

horizontal at a speed of 8020 rev/min.6

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IS : 2386 Part II) - 1963c A sedimentation pipette of the Andreason type of approximately25 ml capacity and of the general form indicated in Fig. I. Thisconsists mainly of a pipette fitted at the top with a two-way tapand held rig idly in a clamp which can be r ai sed or lowered asrequired, and which is fitted with a sca le f rom which the changesin height of the pipet te can be read.

The volume of the pipette inc luding the connect ing bore ofthe tap B is determined by filling with distilled water; by reversingthe tap, the water is run out into a bott [c weighed and the volumecalculated.d A I OOO ml measuring cylinder.e A scale or balance of capacity not less than 10 kg, readable andaccurate to one gram.f A scale or balance of capacity not Jess than 250 g, readable andaccurate to 0001 gog A well-ventilated oven, thermostatically controlled, to maintain atemperature of 100 to 1100

3 3 Chemicals - A solution containing 8 g of sodium oxa la te per litre ofdistilled water shall be taken. For use, this stock solution is diluted withdistilled water one tenth that is 100 ml diluted with distilled water toone litre).3. Test Sample - The sample for test shall be prepared from the mainsample taking particular care that the test sample contains a correctproportion of the finer material. The amount of sample taken for test shallbe in accordance with Table 1.

TABLE I WEIGHT OF SAMPLE FOR DETERMINATION OF CLAY.FINE SILT AND FINE DUSTMAXIMUM S IZE PRESENT INSU ST NTI L PAOPOR l IONA

rom63 to 2620 to 12510 to 63475 or arnaller

ApPROXIMATE \VEJOBT OFS P L } ~ FOR TesT

kg610-:;0 3

3....1 All-in aggregates shall be separated into fine and coarse fractionsby sieving on a 475-mm IS Sieve and the two samples so obtained shallbe tested separately.

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IS : 1386 Part n - 1963

E

c

B

SCALE GRADUATED em ND mm

SL OING PANEL

1000 mtSEDIMENTATIONTU E

FIG. 1 8BDIIIBNTATION PIPE TT B rO B DETBRMINATIONOJ CLAY AND SILT CONTENT3.5 Test Procedure

3.5.1 etho for ine ggregate - Approximately 300 g of the samplein the air-dry condition passing the 475mm IS Sieve shall be weighedand placed in the screw-topped glass jar together with 300 ml of thediluted sodium oxala te solution. The Tubber washer and cap shall befixed care being taken to ensure watertightness. The jar shall then be8

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IS : 1386 Part I I 1963rotated about its long axis, with this axis horizontal, at a speed o f 8 0 2 0rev/min for a period of 15 minutes.

3.5.1.1 At the en d of 15 minutes, the suspension shall be pouredinto the I mimeasuring cylinder and the r es id ue w as he d by gentleswirling and decantation of successive ISO-rol portions of sodium oxalatesolution, the washings being added to the cylinder until th e volume ismade up to 1000 ml. The determination shall be completed as describedn 3.5.3.

3 5 etho for Coarse Aggregate - T he weighed s am ple sh all beplaced in a suitable container, covered with a measured volume o f sodiumoxalate solution 0 8 g pe r litre), agitated vigorously to remove alladherent fine material and the liquid suspension transferred to theI mimeasuring cylinder. This process shall be repeated as necessaryuntil all clayey material has been transferred to the cylinder. T h e volumeshall be made up to 1 000 ml with s od iu m o xa la te solution and thedetermination completed as described in 3.5.3.3.5.3 The suspension in the measuring cylinder shall b e t ho ro ug hl ymixed by inversion and the tube and contents immediately placed inposition under th e p ip ette. The pipette A shall then be gently loweredu nt il t he tip touches the surface o f the liquid, and then lowered a further10 cm i nt o t he liquid. Three minutes after placing the tube in position,the pipette A and the bore of tap B shall be filled by opening B a n dapplying gentle suction a t C. A small surplus may be drawn up into the

bulb between tap B and tube C but this shall be allowed to run awayand any solid matter shall be washed out with distilled water from EThe pipette shall then be removed from the measu ring cylin der and itscontents run into a weighed container, a ny a dh er en t solids b ei ng w ah se dinto the container by distilled water from E through the tap The contents of the container shall be dried at 100 to 110C toconstant weight, cooled and weighed.

3.6 Calculations - The proportion of fine silt and clay or fine dust shallthen be calculated from the following formula:Percentage of clay and fine sil t or fine dust ~ 1 WI - O Swhere

WI = weight in g of the original sample,WI = weight in g o f the dried residue,V = volume in ml o f the pipette, and08 E weight in g of s od iu m o xa la te in one litre of thediluted solution.

N O T E - No correction is made for w ate r soluble ealta whioh may be p nin the aand, since t he a m ou nt of mob Ita should be amall.

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IS : 2386 Part II ) - 19633.7 Reporting of Results - The clay, fine silt and fine dust content shallb e r ep or te d to the nearest 01 percent.

4. DETERMINATION OF LIGHT-WEIGHT PIECES C O A L AND LIGNITE)...t Object - T hi s m et ho d of test covers the procedure or determinationo f approximate percentage o f light-weight pieces in aggregate by meanso f sink-float separation in a heavy liquid of suitable specific gravity.4. 2 Apparatus - T h e apparatus shal l c onsist o f the following:

a) alances_. For weighing fine aggregates, a balance having acapacity o f not less than 500 g, sensitive to at least 01 g; forweighing coarse aggregates, a balance having a capacity o f not lessthan 5 000 g, sensitive to at least I g.b Containers - Containers suitable fo r drying t he a gg re ga te sample,and containers suitable fo r holding the heavy liquid during the

sink-float separation.c) Skimmer - A piece of300-micron sieve cloth o f suitable size andshape for s ep ar at in g t he f lo atin g p ieces from the heavy liquid.d Hot Plate or Oven

4.3 Heavy Liquid.3.1 T h e heavy liquid shall consist of a mixture of carbon tetrachloride, and 1, I, 2, 2- tetrabr omoethane, br omof or m, and monobromobenzene, or bromoform and benzene s Note 1 ), in such proportionsthat the desired specific gravity will be obtained see Note 2). Bromotrichloromethane may be used as a heavy liquid having a specif ic gravityo f 2 00. T he specific gravity shall be maintained within 0 01 of thespecified value at all times during the test.

NOTIC 1 - Recovery of th e bromoform in the bromoform-benzene mixturecan be effected y running .. stream of wat.er through the mixture until al l benzeneh a l been dissclved and removed.N O T E 2 - Caution : The chemicals listed in 4.3.1 are highly toxic, botb yabeor pti on t hrough the skin and by inhalation. T he y shall be used only in a hood,a nd s h a n be taken t.o avoid contact, with th e skin or inhalation o f the fumes,

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IS : 2386 ( Part II ) 19634.3.2 The approximate volumes of materials to be combined toproduce a mixture of the desired specific gravity may be computed fromthe following specific gravities of the different liquids:

iquid1,I,2,2-tetrabrornoethaneBenzeneBromoformCarbon tetrachlorideMonobrornobenzene

SpecificGravit )2-970'882 88158 49

4.3.1.1 For determining coal and lignite, the heavy liquid used shallhave a specific gravity of 2 00 O'O]. .4 Sample - The minimum size of test sample shall be as follows:

aximum Size ofAggregatemm

6-3 ( fine aggregate )204080

4.S Procedure

inimum Weight Sampleg

2003000500010000

4 5 Fine Aggregate - Allow the dried sample of fine aggregate tocool to rOOIJl temperature and then sieve over a 300-Inicron IS Sieve untilless than one percent of the retained material passes the sieve in oneminute of continuous sieving, Weigh the material coarser than the300-micron IS Sieve the nearest 0 1 g; then int roduce it into the heavyliquid in a suitable container, the volume of l iquid being at least three t irnesthe absolute volume of the aggregate. Pour the liquid off into a secondcontainer, passing it through the skimmer and taking care that only thefloating pieces arc poured off with the liquid and that none o f the sand isdecanted onto the skimmer. Return to the first container the liquid thathas been collected in the second container and, after further agitation ofthe sample by stirring, repeat the decanting process just described untiltile sample is free of floating pieces. Wash the decanted pieces containedon the skimmer in carbon tetrachloride, unti l the heavy liquid is removed,and then dry, The pieces wiil dry very quickly, but may be placed inan oven at IOS C for a few minute if desired. Brush the dry decante-d

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IS : 2386 u n 1963piece. from the skimmer onto the balance pan and determine the weightto the nearest 01 g.

4 5 2 Coarse ggregate- Allow the dried sample of coarse aggregateto cool to room temperature and sieve over a 4 7S mm IS Sieve, Weighthe material coarser than the 4-7S-mm IS Sieve to the nearest 1 g; thenintroduce it into the heavy liquid in a suitable container, the volume ofliquid being at least three times the absolute volume of the aggregate,Using the skimmer, remove the pieces that rise to the surface, and lavethem. Repeatedly agitate the remaining pieces and remove the floatingpieces until no additional pieces rise to the surface. Wash the decantedpieces in carbon tetrachloride until all of the heavy liquid is removed, andallow to dry. Determine the weight of the decanted pieces to the nearestone gram.

N O T Materials, browniah black or black shan e considered as coal andlipite and shall be collected and weilhed.4.6 Calculation - Calculate the percentage of light-weight pieces piecesfloating on the heavy liquid as follows:

For fine aggregate:L = _ X 100WI

For coarse aggregate:

where percentage of light-weight pieces;

WI =a dry weight in g, of decanted pieces;W z dry weight in g, of portion of sample coarser than300-micron IS Sieve; and = dry weight in g, of portion of sample coarser than4 7S mm IS Sieve.

4.7 a.portlnl of a.ults- The percentage of light-weight pieces coaland lignite in the aggregate shall be reported to the nearest 1percent.

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IS : 2386 (Part II - 9635.4 Procedure - Each particle of aggregate under test shall bescratched with the brass rod described in 5.2 using only a small amount(about 1 kg) of pressure. Particles are considered to be soft i f during the

scratching process, a groove is made in them without deposition ometal from the brass rod or if separate particles are detached from therock mass.

NOTE - In the 8S6 of some sandetones , brass fragments m y be depoaitedon hard individual grains while a t t he same time sepa ra te particles a re datachedfrom t.he mess due to a weak binding medium. Such par ti cles ar e to be coneideredas soft ,

s s Calculation and Report - The report shall include the followinginformation:

a Weight and number of particles of each size of each sample tes tedwith the brass rod;

b \Veight and number of particles of each size of each sampleclassified as soft in the test;

c Percentage of test sample classified as soft by weight and bynumber of particles; andd \Veighccl average percentage of soft particles calculated from percentage in item c and based on the grading of sample of aggre

gate received for examination Of preferably, on the averagegrading of the mater ia l from that portion of the supply of whichthe sample is representative. In these calculations, sizes finer thanthe lfl-ruru IS Sieve shall not be included.6. ES flMATION OF ORGANIC ~ P U R I T I S6.1 Object - This method of test covers an approximate method ofestirnat in o whether organic compound are present in natural sand insufficient quantities to be harmful , and hence intended to show whetherfurther tests are neressarv or desirable.

KOTE Hurrnlesa organic materials nH.1.Y cause colourat ion and certainnaturally occurr in g organic corn pounds do not cause colourat ion.6.2 Procedure

6.2.1 The sand shall be tested as delivered and without drying.A 3S0-ml graduated clear glass medic ine bot tle shall be filled to the75-ml mark with 3 percent solution of sodium hydroxide in water. Thesand shall be added gradually until the volume measured hy the sand

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IS : 2386 Part II) 1963layer 125 ml The volume shall then be made up to 200 ml byadding more solution. The bottle shall be stoppered and shakenvigorously and then allowed to stand for 24 hours..2.1 Other test shall be made if the colour of the liquid abovethe sand is darker than a standard solution freshly prepared as follows:

Add 25 ml of 2 percent solution of tannic acid in 10 percentalcohol to 97 5 ml of a 3 percent sodium hydroxide solution.Place in a 350-ml bottle, stopper shake vigorously and allowto stand for 24 hours before comparison with the solution abovethe sand. Alternatively an instrument or coloured acetate sheetsfor making the comparison can be obtained, but it is desirablethat these should be verified on receipt by comparison with thestandard solution.

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BUREAU OF INDIAN STANDARDSHeadquartersManak Bhavan, 9 Bahadur ShahZafarMarg, NewDelhi110002Telephone8:23230131 23233375 23239402 Fax: 91 011 23234062 23239399 23239382E-mail: bis@vsnl.com website: http://www.bis.org.inCentral LaboratoryPlotNo.20/9 Site IV Sahibabad Industrial Area, SAHIBABD 201010Regional O lcesCentral: ManakBhavan, 9 Bahadur Shah ZafarMarg, NewDelhi110002*Eastern; 1/14CITScheme V M V.I.P. RoadKankurgachi, KOLKATA 700054Northern: SCQ335-336, Sector34 A Chandigarh 160022Southern: C.I.T.Campus, IV CrossRoad, CHENNAI600113Western: Manakalaya, E9 MIDC, Behind MarolTelephone Exchange,Andheri (East), MUMBAI 400093Branch officesPushpak Nurmohamed Shaikh Marg, Khanpur, AHMEDABAD 380001Peenya Industrial Area, 1 Stage, Bangalore-Tumkur Road, BANGALORECommercial-cum-office Complex, opp.Dushera Maidan, AreraColony,BittanMarket, BHOPAL 46201662/63 GangaNagar, UnitVI BHUBANESHWAR 7510015TH Floor KovaiTowers, 44 BalaSundaram Road, COIMBATOAE 641018SeQ21 Sector12 Faridabad 121007Savitri Complex 116G.T. RoadGhaziabad 20100153/5WardNo. 29 A.G.Baraua Road5 by-lane, Apurba SinhaPathGUWAHATI7810035-8-56C L.N.GuptaMarg, Nampally Station Road, HYBERABAD 500001E-52, Chitranjan Marg, C Scheme, JAIPUR 302001117/4188 Sarvodaya Nagar, KANPUR 208005SethiBnavan, 2n1iFloor, Behind LeelaCinema, NavalKishore Road,LUCKNOW 226001NITBuilding, Second Floor, Gokulpat Market, NAGPUR 440010Mahavir Shavan, FirstFloor, RoparRoad, NALAGARH 174101Patliputra Industrial Estate, PATNA 800013FirstFloor, PlotNos 657-660, MarketYard, Gultkdi, PUNE 411037Sahajanand House 3td Floor Bhaktinagar Circle, 80FeetRoad,RAJKOT 360002T.C.No. 14/1421, University P.O.Palayam, THIRUVANANTHAPURAM 6950341stFloor, UdyogShaven, VUDA, Siripuram Junction, VISHAKHAPATNAM03SalesOfficeis at 5 Chovlringhee Approach, P.O.Princep Street, Kolkata700072SalesOfficeis at Novelty Chambers, GrantRoad, MUMBAI 400007

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