IS 1489-2: Specification for Portland-pozzolana cement, Part 2: calcined clay based

19 Pages·1991·1.6 MB·English

by  Bureau of Indian Standards

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IS 1489-2 (1991): Specification for Portland-pozzolana
cement, Part 2: calcined clay based [CED 2: Cement and
Concrete]
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IS 1489 (Part2) :1991
(Reaffirmed2009)
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Indian Standard
PORTLAND-POZZOLANA CEMENT —
SPECIFICATION
PART 2 CALCINED CLAY BASED
(Third Revision)
Second Reprint DECEMBER 2004
UDC 621.944.1.046
<0BIS 1991
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
May 1991 PriceGroup4
AMENDMENT NO.1 NOVEMBER 1991
TO
IS1489(Part2):1991 PORTLAND·POZZOlANA
CEMENT- SPECIFICATION
PART2 CALCINED CLAYBASED
(ThirdRevision)
(Page5,clauseft.l':)- Substitute cupto2Stonnes'for'of20to25
tonnes'.
(COO2)
Printed8tSimcoPrinting-Pre.. Deihl.India
AMENDMENT NO.2 JUNE 1993
TO
IS1489 (Part2):1991 PORTLAND-POZZOLANA
CEMENT- SPECIFICATION
PART2 CALCINED CLAY BASED
(ThirdRevision)
( Page 3, clauses 10.2.2 to 10.2.2.4 ) - Substitute the following for the
existingclauses:
"10.2.2 When cement is intended for export and if the purchaserso requires,
packingofcementmay bedoneinbags orindrumswithanaveragenet massof
cement per bag or drum as agreed to between the purchaser and the
manufacturer.
10.2.2.1 For this purpose the permission of the certifying authority shall be
obtainedinadvanceforeachexportorder.
10.2.2.2The words ':FOREXPORT' and the average net mass ofcementper
bag/drumshallbeclearlymarkedinindelibleinkoneachbag/drum.
10.2.2.3The packing material shall be as agreed to between the manufacturer
andthepurchaser.
10.2.2.4The tolerancerequirementsforthe massofcementpackedinbags/drum
shallbeasgivenin10.2.1.1excepttheaveragenet mass whichshallbeequalto
ormorethan thequantityin10.2.2"
(CEO2)
PnntedatSimcoPnnungPress.Delhi
AMENDMENT NO. 3 MAY 2000
TO
IS 1489 (Part 2) :1991 PORTLAND-POZZOI.ANA
CEMENT- SPECIFICATION
PART2 CALCINEDCLAYBASED
(ThirdRetrision)
Substitute'netmass' for'nominalavengenetmass'and 'averagenetmass'
wherevertheseappearinthestandard.
(CED2)
PrintedatSImcoPrinnngPress,Deihl
AMENDMENT NO. 4 JUNE 2009
TO
IS 1489 (PART 2) : 1991 PORTLAND-POZZOLANA CEMENT ―
SPECIFICATION

( Third Revision )

(Page 3, clause 10.2.1) ― Substitute the following for the existing:

‘The net mass of cement per bag may also be 25 kg, 10 kg, 5 kg, 2 kg or 1 kg subject to tolerances as given
in 10.2.1.1 and packed in suitable bags as agreed to between the purchaser and the manufacturer.’

(Page 3, clause 10.2.1.1, last sentence) ― Substitute the following for the existing:

‘However, the average of net mass of cement in a sample shall be equal to or more than 25 kg, 10 kg, 5 kg,
2 kg or 1 kg, as the case may be.’

(CED 2)

Reprography Unit, BIS, New Delhi, India
Cementand Concrete Sectional Committee,CED2
FOREWORD
This Indian Standard (Part 2) (Third Revision )was adopted by the Bureau of Indian Standards
after the draftfinalized by theCementand Concrete SectionalCommittee had been approved by the
Civil EngineeringDivision Council.
Portland-pozzolana cement can be produced either by grinding together Portland cement clinker
and pozzolana with addition ofgypsum or calcium sulphate, or byintimatelyand uniformly blending
Portland cementandfine pozzolana. While grindingofthe two materialstogetherpresentsno difficulty,
themixingofdrypowdersuniformly is extremely difficult. The blendingmethod should, therefore, be
resorted to only when thegrindingmethod is impossible or proves uneconomical in a particular case.
Whereblendingmethod is adopted, everycare should be taken to see that the blendingis as intimate
as possible. Generally, if the blending isnot uniform, it is reflected in the performancetests. The
SectionalCommittee responsible for the preparation ofthis specification is of the opinion that the
blending method should be confined to factories and such other workswhere intimate and uniform
blending is feasible withthe employmentofrequisite machinerysoas to ensure uniformity of produc
tion and guaranteed performance.
Portland-pozzolana cement produces less heat of hydration and offers greater resistance to the
attack of aggrcsxivc waters than normal Portland cement. Moreover, it reduces the leaching of
calciumhydroxide liberated during thesettingand hydrationof cement. It is particularly useful in
marineand hydraulic construction and other mass concrete structures. Portland-pozzolana cementcan
generally be used wherever 33 grade ordinary Portland cement isusable under normal conditions.
However, it should be appreciated that all pozzolanas need not necessarily contribute to strength at
earlyages. In view ofthis fact, this present spccificution has been preparedto enable manufacturers to
producePortlund-pozzolana cement equivalent to 33gradeordinary Portland cement on the basis of
3, 7and 28-days compressive strength.
for constructionofstructuresusingrapid constructionmethods like slipf'orrn construction, Portland
pozzolanacement shaHbe used with caution since4to 6 hstrength of concrete is significant in such
construction.
Thisstandardwas first published in 1962and subsequently revised in 1967and 1976. In this revision
the standard has been split into two partsbased on the pozzolana used in the manufactureofsuch
cementsin view ofthe special needs of some hydraulic structures which require pozzolanacement
manufactured onlywith flyash pozzolana and for easy identification of pozzolana used in themanu
facture ofPortland-pozzolana cement in the interest of consumers. Part 1of this standard covers
pozzolana cementmanufactured by using only fly ash pozzolana and Part 2coverspozzolana cement
manufactured by using eithercalcined clayor amixtureofcalcined clay and flyashas pozzolana. In
this revision both chemicaland physical requirements have been kept the sameas was given in 1976
versionof thisstandard as amended from time to time. Various requirements of Portland-pozzolana
cementgiven in 1976 version ofthis standard had been modified from timeto time by issuingamend
ments based on the experiencegained with the use ofthe standard and the requirementsof theusers
andalsokeeping in view the rawmaterialsandfuel available in the countryfor manufactureofcement
The important amendments include loweringthe valueof compressive strength in lime reactivity
testfrom 5MPa to 4 MPa. incorporatinga valueof3day compressive strength as 16MPa, modifying
the requirement ofsulphuric anhydride ( SOs) and insoluble residue, deleting the requirement of
pozzolanicitytest, increasingthe value of28 days compressive strenth from 31MPato 33 MPa,making
autoclave soundness tcst compulsory irrespectiveofthe magnesia content in cement, incorporating
a provision for retest in respect ofautoclave soundness tcstafter aerationofthe cement, incorporting
a clauseon false set ofcement and perrnitting packagingof cement in 25kg bags. A11 these amend
ments have beentaken careof in this revision.
Massof cement packed in bagsand the tolerance requirements for the mass ofcement packed in bags
shallbe inaccordance with the relevant provisionsofthe Standardof Weightsand Measures (Packaged
Commodities) Rules. 1977and 8-1.2 (see Annex B). Any modification in these rutes in rcspcct of
tolerance on massofcement would apply automatically to this standard.
(ContinuedOil thirdcorer)
IS 1489(Part2): 1991
Indian Standard
PORTLAND-POZZOLANA CEMENT
SPECIFICATION
PART2 CALCINEDCLAY BASED
( Third Revision)
1 SCOPE shall be either Lalcined clay pozzolana confor
mingto IS 1344 : 1981 or a mixture of calcined
This Standard (Part 2) (Third Revision) claypozzolana conformingto IS \344:\981 and
covers themanufacture,physicaland chemical flyash conformingto IS 3812 : \98\ subject to
requirements of Portland-pozzolana cement the requirements of4.1.2 and 4.1.3.
manufacturedby usingcalcined clay pozzolana
or a mixture of calcined clay and fly ash 4.1.2 Finenessand average compressivestrength
pozzolana, in lime reactivity of pozzolana that is to be
blended with finished Portland cement to pro
2 REFERENCES duce Portland-pozzolana cement, when tested
The Indian Standards listed in Annex A are in accordance with the procedure specified in
necessaryadjunctsto thisstandard. IS 1727 : 1967, shall notbe lessthan 320 mt/kg
and 4·0 MParespectively. Average cornpressive
3 TERMINOLOGY strength in lime reactivity test of such POlZO
lana shall be carried out at the fineness at
3.0 For thepurpose of this standard, the d~fi­ which pozzolanahasbeenground for blending.
nitions given in IS 4845 :1968and the following
shall apply. 4.1.3 Average compressive strength in lime
reactivityofpozzolanathat istobe interground
3.1 Pozzolana
with Portland cement clinker for manufacture
An essentiallysiliciousmaterial which while in of Portland-pozzolana cementshall not be less
itselfpossessing little or no cementitious pro than 4·0 MPa when tested at the fineness of
perues will, in finely divided form and In~he POItland-pozzolana cement manufactured out
presenceofwater, reactwith calciumhydroxide ofit or at thefinenessin'asreceived' condition,
at ambient temperature to form compounds whichever is greater, in accordance with proce
possessing cementitious properties. The term durespecified in IS 1727: 1967.
includesnaturalvolcanicmaterialhavingpozzo 4.1.4 Thepurchasershall have the right, if he
Ianic properties as also other natural and so desires to obtain samplesof pozzolana used
artificial materials, such as diatomaceous earth, in the manufacture of Portland-pozzolana
calcined clayand flyash. cementfor purposesof checking its conformity
3.2 Portland Clinker to the requirements specified in 4.1.1 to 4.1.3.
Clinker, consisting mostly of calcium silicates, 4.2 PortlandCement Clinker
obtained by heating to incipient fusion, a ThePortland cement clinker used in the manu
predetermined and homogeneous mixture of facture of Portland-pozzoJana cement shall
materials principally containing lime (~aO) comply in all respects with the chemical
and silica (SiO.)with a smaller proportion of requirementsofIS 269 : 1989and the purchaser
alumina(AIsOs)and iron oxide (FCtOs ). shall have the right, ifhe so desires,to obtain
3.3 Portland-PozzolaDaCement samplesofthe clinkerused in the manufacture
for purposes of checking its conformity to
An intimatelyinterground mixture of Portland IS 269: 1989.
clinker and pozzolana with the possible addi
tion ofgypsum (natural or chemical) or an 4.3 Portland Cement
intimate and uniform blending of Portland
Portland cement for blending with pozzolana
cementand fine pozzolana.
shall conformto IS 269 : 1989.
4 RAW MATERIAL
4.4 OtherAdmixtures
4.1 Pozzo)aua
When Portland-pozzolana cement is obtained
4.1.1 Pozzolana used in the manufactur e of by grinding pozzolana with Portland cement
calcined claybased Portland-pozzolana cement clinker, no material other than gypsum