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IS 2386-6 (1963): Methods of test for aggregates forconcrete, Part 6: Measuring mortar making properties offine aggregates [CED 2: Cement and Concrete]

IS : 2386 ( Part VI) - 1963(Reaffirmed 2011)

Indian Standard

METHODS OFTEST FOR AGGREGATES FOR CONCIPART VI MEASURING MORTAR MAKING PROPERTIES

OF FINE AGGREGATE

Tenth Reprint APRIL 2006( Including Amendment No.1 and 2 )

© Copyright 1963

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr 2 October 1963

IS J 1386 ( Part VI ) • 1963

Indian StandardMETHODS OF TEST

FOR AGGREGATES FOR CONCRETEPART VI MEASURiNG MORTAR MAKING PROPERTIES

OF FINE AGGREGATE

Cement and Concrete Sectional Committee, BDC 2Chairman Representing

~llRI K. K. NAMBIAR The Concrete Association of India, BombayMembers

~HRI K. V. TltADA-SEY ( Alternate to:Shd K. K. Narnbiar )

~ll.lU K. F. Ax'rIASHIH 1'. :S. BHA'.rNAGARDu I. C. Dos 1\1. PAIS CUDDOU

1\1. N. Dastur & Co Private Ltd , Calcutt»Bhakra Dam Designs Directorate, Kew D6JhiCentral '\\,Yater & Power Commission ( Miuil:itryof

Irrigation & Power )~J(UI Y. K. MURTHY ( Alternate)

~Hltl N. D. DAFTABY Khira Steel Works Private Ltd, Bombay8HRI N. G. DEWAN Central Public "'Yorks Department

SUPERINTENDING ENGINEER,2:-iD CIRCLE ( Alternate)

DJ~ R. R. H ATTIANGADI The Associated Cement-Companies Ltd , Bombay8HBI V. N. PAl ( Alternate)

SURI J}. C. HAZRA Geological Survey of India, CalcuttaJOINT DIREc'rOR STAXDARDS Research, Designs & Standards Organization

( B & S ) ( Ministry of Railways)ASSISTANT DIRECTOR STAND-

ARDS ( B & S ) ( Alternate )SUBI S. B. JOSHI S. B. Joshi & Co Private Ltd, BombaySHIU 1\1.1\1. LAL U. P. Government Cement Factory, Churk~HRI B. N. l\IAJUl\IDAR Directorate General of Supplies &; Disposals ( Mini.-

try of Economic & Defence Co-ordination)

( Continued onpage 2 )

SURI P. L. DAB ( Alternate)!lUO}' S. It. ~lEHRA Central Road Research In.stitute (CSIR), New

Delhi8HBI X. H. l\IOlIILE The Concrete Association of India, BombaySHIU S. N. ~IUKERJI Government Test House, Calcutta

~HIU N. C. Sl!.:N GUPTA ( Alternate)8HBI EBACH A. N ADIRSHAH Institution of Engineers ( India ), Calcutta~UBI C. n, PATEL National Buildings Organisation (Minist.ry of

Works, Housing & Rehabilitation)SURI RABINDl!;R SINGH ( Alternate )

PROF O. S. IlAMAs\\'AMY Central Building Research Institute (CSIR),Roorkee

SURI K. SIVA PRASAD ( Alternate)SHUI T. N. 8. RAO Gammon India Limited, Bombay

:::>HRI S. R. PlliHElRO (Alternate)

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARO

NEW DELHI 110002

18 I 2386 ( Part VI ) • 1963

( ColIIllJllea from page 1 )Mtmbers

RxpaalCNTATIVP:~HRI NIHAB CHANDRA Roy~E(;BETAR"

SecretarySHut A. PRI'!'HIVI IL\"

ExtrB Assistant Director ( Bldg ), BIS

Concrete Subcommittee, BDC 2 : 2

Reprtst1lnng~Itll,tin Burn Ltd, CalcuttaDulmia Cement C Bharar ) Ltd, CalcuttaOentral Boord of Irrigatiou & Power ( l\Iinistl'Y of

Irrigation & Power )HRIG G. S. SIROTA Ellgilloer-in·Chief's Branch, .:\1'1l1~P Headquarters

'-iRBI R, 8. 11~~liA:NDnu ( Alternate )DR BH. SUDRARAJV Indian RO~l(.l., Congress, 'Now DelhiSHRI J. 11. TR};}IAN Roads \\"jug, )Iiuiat I'Y of 'I'ransport &. Conuuuui-

vat icue8){RI ~. H, KK8WA~1 ( Alternate )

VB H. C. VISVJo;SVABAYA, Director, BIS, ( Ex-officio Member )Deputy Director ( Bldg)

ConvenerSHRI S. B. JOSHI S. B, Joshi & Co Private Ltd, Bombay

MembersASSISTANT DIREC1.'On S·.rA~D- Research, Designs & Standards Organization

ABDR ( B & s ) ( l\Iinistry of Railways)SUBI N. H. nH AOW ANA~I Engineer- in-Chief''s Branch, Army HeadquartersDu I. C. Dos M. PAIS Cunnou Central Wo,ter & Power Connuissicn (Ministry of

Irrigution & POW01' )

~Hal Y. K. :\IuR1.'uy ( Alternate)~HBI P. IJ. DA~ Directorate General of Supplies & Diepoaels

( Ministry of BCUIlOIUic & Defence Co-ordlna­tion)

SKRI D. x, ~IAJ UMDAR ( Alternate)DIRECTOR Enginoering H,08CUl'eh LU),Ol'UtOl'y, HyderabadSURI V. N. GUNAJI Mahareshtra Public 'Yorks Department:SHBI1\1. A. HAJ'EEZ National Buildings Organisation (}linistl'y of

Works, Housing & Rehabilitation )SKBI B. S. SHIVA~UR'r"Y ( Alternate )

~.HRI C. I~. HANDA Central "-nLer & Power Commiasion ( ~Iillistry ofIrrjgation & Power )

SKat P. e. HAZRA Goological Survey of Fndin, Calcut.ta~HRI K. K. ~AMBl.\R 'I'he Concrete Associutiou of India, BOlnUt\Y

SHRX C. L. N. I Yl!:SOAR (Allt!rllale )Va M. I". PURl Central Road Research Institute (CSIR), New

Delhi1)gol' G.~, RAMA8\vluy Central Building Rcseurch Inatituto (CSIR),

Roorkee~HRI K. Hlv.\. PBASAU ( ..Alternate )

5MBI T. N. 8. RAO Gammon India Ltd , BouibuySHBt S. R. PIS lIll:IRO ( Alternate)

SU.PERINT~NDl.NG ENOINb:ER, Central Public 'VorkH Department2~D CIRCLE

SHIll O. P. GOEL ( Alternate )SKIll J. M. TBEHAN Roads \Ving. J\linjstry of Transport & Communica-

tionsSHBI R. P. SlICKA ( Alternate )

SHBI H. 'r. YAN Braithwaite Burn & Jessop Construction Co Ltd,Calcutta

2

AMENDMENT NO. 1 FEBRUARY 1982TO

IS:2386(Part VI)-1963 METHODS OF TEST FORAGGREGATES FOR CONCRETE

Part VI MEASURING MORTAR MAKING PROPERTIESOF FINE AGGREGATF

Alteration-----[Page B~ claus.. ? and ?1 (zagnumbered as 8 and

8.1)] - Substitute the following tor the existingclauses:

,8 • REPORTING 01 RESULT

8.1 CaJ.culate the average crushing strength or Dotless than three specimens containing untreated sand.Similarly calculate the average crushing strength ofthe corresponding number ot specimens containingtreated sand. Report the average crushing strengthot specimens containing untreated Band as a percentageot the average crushing strength or the speelmen8containing treated sand.'

Addend!!!

(Page 4~ claws. 1.1) - Add tbe tollowing DeY

clauses after 1.1 and renumber the clauses '2 to T' &s'3 to 8':

"2 • BASIS rOR COMPARlSOB

2.1 The rine aggregate shllll be compared 1n !IOrter,&S deserlbed in this methoti. with a sample or the sameaggregate that has been washed in a 3 percent solutionof sodium hydroxide folloved by thorough rinsing invater. The treatment shall be repeated till the¥ashed material produces a colour lighter than that or

the at&Dd&r4 801utioD d••crlbe4 in 6.2.2 otrS:2386(P&rt 11)..1963 'Methods of telt tor agrepteatar coacrete : Part II Eatl..tloD ot deleteriousmaterials &Del organic lmpurltiea'. Bowever, it .ballbe ensured that DO tine. are lOlt vIlile va.hiDS vithaodiwa h)rdroxide. The vaahed aDd r1Dsed aggrepteahall be ehecked with a lu1table indicator Iuch ..phenolphtbaleiD or l1t.u. to •••ure that all trace.of sodium h7dronde are re8)Yed tro. the aggreptebetore being u.ed tor -.tiDS cODtrol .,rtar."

(BDe 2)

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AMENDMENT NO.2 OcrOBER 1991TO

IS 2386 ( Part 6) : 1963 METHODS OF TEST FORAGGREGATES FOR CONCRETE

PART 6 MEASURING MORTAR MAKING PROPERTIES OF FINEAGGREGATE

t Pag«4, clause 1.2 ) - Substitute the following for the existing clause:•2.1 Tamping liar - The tamping bar shall be made of nor-absorbent, abrasionresistant, non-brittle material such as a rubber compound having a Shore Adurometer hardness of 80 ± 10 or seasoned teak wood rendered non-absorbentby immersion for 15 minutes in paraffin at approximately 2000e and shall have across-section of 12.5 x 25 mm and a convenient length of 125 to 150 mm. Thetamping face shall be flat and at right angles to the length of the bar.'

( Page 4, clause 1.4 ) - Substitute the following for the existing clause:"Z.4 Moulds - These shall be 50 mm cube moulds and shall conform 10 therequirements laid down in IS 10036 : 19M2 'Specification for moulds for use intests of cement and concrete'."

( Page 5, clause 3.1, NOlt: ) - [klete.

( Page 5, clause 5.1, line 2) - Substitute '50 nun' for '7.06 crn '.

(CED 2)

Printed at Prabhat Offset Press, New Delhi-2

IS I 2386 ( Part VI ) • 1963

Indian StandardMETHODS OF TEST

FOR AGGREGATES FOR CONCRETEPART VI MEASURING MORTAR MAKING PROPERTIES

OF FINE AGGREGATE

o. FOR E W 0 R D

0.1 This Indian Standard ( Part VI ) was adopted by the Indian StandardsInstitution on 13 September 1963, after the draft finalized by the Cementand Concrete Sectional Committee had been approved by the BuildingDivision Council.

0.2 One of the major contributing factors to the quality of concrete isthe quality of aggregates used therein. The test methods given in thisstandard are intended to assist in assessing the quality of aggregates. In agiven situation, for a particular aggregate, it may not be necessary toassess all the qualities and therefore it is necessary to determine beforehandthe purpose for which a concrete is being used and the qualities of theaggregate which require to be assessed. Accordingly, the relevant testmethods may be chosen from amongst the various tests covered in thisstandard. For the convenience of the users, the test methods are groupedinto the following eight parts of Indian Standard Methods of Test forAggregates for Concrete ( IS : 2386 - 1963):

Part I Particle Size and ShapePart II Estimation of Deleterious Materials and Organic

ImpuritiesPart III Specific Gravity, Density, Voids, Absorption and

BulkingPart IV Mechanical PropertiesPart V SoundnessPart VI Measuring Mortar Making Properties of Fine AggregatePart VII Alkali Aggregate ReactivityPart VIII Petrographic Examination

0.3 The Sectional Committee responsible for the preparation of this standardhas taken into consideration the views of the concrete specialists, testingauthorities, consumers and technologists and has related the standard to thepractices followed in this country. Further, the need for internationalco-ordination among standards prevailing in different countries of the worldhas also been recognized. These considerations led the Sectional

3

18 I 2386 ( Part VI ) • 1963

Committee to derive assistance from C 87 - 62T Tentative Method of Testfer Measuring Mortar Making Properties of Fine Aggregate issued hyAmerican Society for Testing and Materials.

0.4 Wherever a reference to any Indian Standard appears in this method, itshall 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 accordance withIS: 2-1960 Rules for Rounding Off Numerical Values (Revised). Thenumber of significant places retained in the rounded off value shou ld be thesame as that of the specified value in this standard.

0.6 This standard is intended chiefly to cover the technical provisionsrelating to testing of aggregates for concrete, and it does not include all the­necessary provisions of a contract.

1. SCOPE

1.1 This standard (Part VI) covers the test procedure for measuring themortar-making properties of fine aggregate for concrete by means ofa compression test on specimens made from a mortar of a plastic consistencyand gauged to a definite water-cement ratio.

2. APPARATUS2.1 Flow Table and Flow Mould - These shall conform to the require­ments specified in 12 of *'IS: 1727· 1960 Methods of Test for PozzolanicMaterials.

2.2 Tamper - It shall be made of a non-absorptive, non-abrasive material,such as medium-hard rubber or seasoned oak wood rendered non-absorptiveby immersion for 15 minutes in paraffin at approximately 200°C and shallhave a cross-section of 12·5 X 25 mm and a convenient length from 125 to150 rom. The tamping face of the tamper shall be flat and at right anglesto the length of the tamper.

2.3 Trowel- It shall have a steel blade 100 to 150 mm in length, withstraight edges.

2.4 Mould. - These shall be 7·06 em cube moulds.

2.5 Tampiag Rod - It shall be approximately 10 mm in diameter and100 rom long, with one end rounded to a hemispherical tip 10 mmdia X approx 300 mm long.

2.6 Testing Machine - A compression testing machine of suitable capa­city shall be used.

4

III 1116(Part VI) • 1963

3. YOIlTAIl3.1 Place cement and water in quantities that will give a water-cement ratioof n·fi by weight in an appropriate vessel and permit the cement to absorbwater for one minute. Mix the materials into a smooth paste with a spoon.Beat into the mixture a known weight of the sample of sand under test thathas been brought to a saturated surface-dry condition. Mix until thematerial appears to be of the desired consistency t flow 100 ± 5). Oontinuethe mixing for 30 seconds and make a determination of the flow inaccordance with 4.

NOT. - }'or six '·00 eru cubes 1830 II or loeUlent and uno g of wawr will u.ualllgive ~"ft'l~ielltnlort.\r. 'rhe \lu~nt,ityof Mud uBed with thi.. alnount of l-elnell" anDyvllry froan 3300 I for fine ..aud to 1) aut» g or InOl'. for uo. .......nd,

4. PROCEDURE

4.1 Qu'efuUy wipe the Row-table top clean and dry, and place the nowmould at the centre. Immediately after completing the mixing operation,place a layer of mortar about 25 nun in thickness in the mould and tamp20 times with the tamper. The tamping pressure shall be just sufficient toinsure uniform filling of the mould. Fill the mould with mortal" and tampclS specified for the first layer. Cut off the mortar to a plane surface, flushwith the top of the mould, by drawing the straight edge of a trowel (heldnearly perpendicular to the mould) with a sawing motion across the top ofthe mould. Wipe the table top clean and dry, being especially careful toremove any water front around the edge of the flow mould, Lift the mouldaway from the mortar one minute aftel" completing the mixing operation.Immediately, drop the table through a height of 12·5 rom ten times in 6seconds. The flow is the resulting increase in average diameter of themortar mass, measured on at least four diameters at approximately equalangles, expressed as a percentage of the original diameter, Should the flowbe too great, return the mortar to the mixing vessel, add additional sand,and make another determination of the flow. If more than two trials needbe made to obtain a flow of 100 ±5, consider the mortar as a trial mortar,and prepat"e test specimens Irom a new batch. If the mortar is too dry,discard the batch. Determine the quantity of sand used by subtracting the,,·eight of the portion remaining after mbdng from the weight of the initialsample.

S. MOULDING TEST SPECIMENS

5.1 Immediately following completion of the tlow test, place the mortal- ill7·06 em cube moulds in two layers, R.od each layer in place with25 strokes of the tamping rod. After the redding has been completed. fillthemoulds to overflowing_ Place the specimens in a moist closet for curiDs.Three to four houn after moulding. strike off the specimens to a amoothlurface. 1lemove the apecimall from the moulds 20 to 24 bow.. aftermoulcliDs UId ,tore in water until tested.

5

IS I 2386 ( Part VI ) • 1963

5.2 The temperature of the mixing water, moist closet, and storage tankshall be maintained at 27 ± 2~C.

6. TESTING OF SPECIMENS

6.1 Test the specimens for compressive strength as given in 6.1.1 to 6.1.3.

6.1.1 Test the specimens immediately after their removal from the moistcloset in the case of 24-hour specimens, and from storage water in the caseof all other specimens, If more than one specimen at a time is removedfrom the moist closet for the 24-hour tests, keep these specimens coveredwith a damp cloth until time of testing. If more than one specimen at atime is removed from the storage-water for testing, keep these specimens inwater at a temperature of 27 ± 2°C and of sufficient depth to immersecompletely each specimen until time of testing.

6.1.2 Surface-dry each specimen, and remove any loose sand grains orincrustations from the faces that will be in contact with the bearing blocksof the testing machine. Check these faces by applying a straight edge(see Note). If there is appreciable curvature, grind the face or faces toplane surfaces or discard the specimen 0

NOTE -- Results much lower than tho true strength will be obtained by loadingfaces of the specimen that are not truly plane surfaces. Therefore, it. is essentia.lthat. specimen moulds be kept scrupulousty clean, us otherwise large irregularitiesin the surfaces will occur. Instrurncuts for cleaning of moulds should 8h"8~'S besofter than the Uleta) ill the moulds to prevent wear. In case grinding of specirneufaces is necessary, it can be accoruplishod Lest by rubbing the specimen on a sheetof fine emery papor or cloth glued to a plano surface, using only a. moderatopressurc. Such grinding is tedious for more thau a few hundredths of a millimetre,where more than this is found necessary, it is recommended that the specimenbe discarded.

6.1.3 Apply the load to specimen faces that were in contact with the trueplane surfaces of the mould. Carefully place the specimen in the testingmachine below the centre of the upper bearing block. Use no cushioningor bedding materials. An initial loading up to one-half of the expectedmaximum load for specimens having expected maximum loads of more than2 500 kg may be applied at any convenient rate. Adjust the rate of loadapplication so that the remainder of the load ( or the entire load in the caseof expected maximum loads of less than 2 500 kg) is applied, withoutinterruption, to failure at such a rate that the maximum load will bereached in not less than 20 nor more than 80 seconds. Make no adjust­ment in the controls of the testing machine while a specimen is yieldingrapidly immediately before failure.

7. REPORTING OF RESULT

7.1 Report the average crushing strength of not less than three specimensand also the age of test.

6

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