2024年4月13日发(作者：华硕主板保修查询)

Designation:C618

−

12a

StandardSpecificationfor

CoalFlyAshandRaworCalcinedNaturalPozzolanforUse

inConcrete

1

ThisstandardisissuedunderthefixeddesignationC618;thenumberimmediatelyfollowingthedesignationindicatestheyearof

originaladoptionor,inthecaseofrevision,rinparenthesesindicatestheyearoflastreapproval.A

superscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.

mentofDefense.

*

1.1Thisspecificationcoverscoalflyashandrawor

calcinednaturalpozzolanforuseinconcretewherecementi-

tiousorpozzolanicaction,orboth,isdesired,orwhereother

propertiesnormallyattributedtoflyashorpozzolansmaybe

desired,orwherebothobjectivesaretobeachieved.

N

OTE

1—Finelydividedmaterialsmaytendtoreducetheentrainedair

,ifaflyashornaturalpozzolanisaddedtoany

concreteforwhichentrainmentofairisspecified,provisionshouldbe

madetoensurethatthespecifiedaircontentismaintainedbyaircontent

testsandbyuseofadditionalair-entrainingadmixtureoruseofan

air-entrainingadmixtureincombinationwithair-entraininghydraulic

cement.

3.1.2flyash—thefinelydividedresiduethatresultsfromthe

combustionofgroundorpowderedcoalandthatistransported

byfluegasses.

N

OTE

2—Thisdefinitionofflyashdoesnotinclude,amongother

things,theresidueresultingfrom:(1)theburningofmunicipalgarbageor

anyotherrefusewithcoal;(2)theinjectionoflimedirectlyintotheboiler

forsulfurremoval;or(3)theburningofindustrialormunicipalgarbage

inincineratorscommonlyknownas“incineratorash.”

fication

4.1ClassN—Raworcalcinednaturalpozzolansthatcom-

plywiththeapplicablerequirementsfortheclassasgiven

herein,suchassomediatomaceousearths;opalinechertsand

shales;tuffsandvolcanicashesorpumicites,calcinedor

uncalcined;andvariousmaterialsrequiringcalcinationto

inducesatisfactoryproperties,suchassomeclaysandshales.

4.2ClassF—Flyashthatmeetstheapplicablerequirements

assofflyashhas

pozzolanicproperties.

4.3ClassC—Flyashthatmeetstheapplicablerequirements

assofflyash,inaddition

tohavingpozzolanicproperties,alsohassomecementitious

properties.

N

OTE

3—ClassFflyashistypicallyproducedfromburninganthracite

orbituminouscoal,butmayalsobeproducedfromsubbituminouscoal

flyashistypicallyproducedfromburninglignite

orsubbituminouscoal,andmayalsobeproducedfromanthraciteor

flyashestypicallyhavetotalcalciumcontents,

expressedascalciumoxide(CaO),thatarehigherthanClassFflyashes.

1.2ThevaluesstatedinSIunitsaretoberegardedas

runitsofmeasurementareincludedinthis

standard.

1.3Thetextofthisstandardreferencesnotesandfootnotes,

otesandfoot-

notes(excludingthoseintablesandfigures)shallnotbe

consideredasrequirementsofthestandard.

ncedDocuments

2.1ASTMStandards:

2

C125TerminologyRelatingtoConcreteandConcreteAg-

gregates

C311TestMethodsforSamplingandTestingFlyAshor

NaturalPozzolansforUseinPortland-CementConcrete

ology

3.1Definitions:

3.1.1Thetermsusedinthisspecificationaredefinedin

TerminologyC125.

ThisspecificationisunderthejurisdictionofASTMCommitteeC09on

ConcreteandConcreteAggregatesandisthedirectresponsibilityofSubcommittee

C09.24onSupplementaryCementitiousMaterials.

CurrenteditionapprovedDec.15,ally

eviouseditionapprovedin2012asC618–:

10.1520/C0618–12a.

2

ForreferencedASTMstandards,visittheASTMwebsite,,or

contactASTMCustomerServiceatservice@ualBookofASTM

Standardsvolumeinformation,refertothestandard’sDocumentSummarypageon

theASTMwebsite.

1

ngInformation

5.1Thepurchasershallspecifyanysupplementaryoptional

physicalrequirements.

5.2Thepurchasershallindicatewhichprocedure,AorB,

shallbeusedwhenspecifyingrequirementsforeffectivenessin

contributiontosulfateresistanceunder

Table3.

alComposition

6.1Flyashandnaturalpozzolansshallconformtothe

requirementsastochemicalcompositionprescribedinTable1.

N

OTE

4—Thechemicalcomponentdeterminationsandthelimitsplaced

*ASummaryofChangessectionappearsattheendofthisstandard

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C618−12a

TABLE1ChemicalRequirements

Class

NF

70.0

5.0

3.0

6.0

A

C

50.0

5.0

3.0

6.0

Silicondioxide(SiO

2

)plusaluminumoxide(Al

2

O

3

)plusironoxide(Fe

2

O

3

),

min,%

Sulfurtrioxide(SO

3

),max,%

Moisturecontent,max,%

Lossonignition,max,%

A

70.0

4.0

3.0

10.0

TheuseofClassFpozzolancontainingupto12.0%lossonignitionmaybeapprovedbytheuserifeitheracceptableperformancerecordsorlaboratorytestresults

aremadeavailable.

TABLE2PhysicalRequirements

Class

N

Fineness:

Amountretainedwhenwet-sievedon45µm(No.325)sieve,max,%

Strengthactivityindex:

A

Withportlandcement,at7days,min,percentof

control

Withportlandcement,at28days,min,percentof

control

Waterrequirement,max,percentofcontrol

Soundness:

C

Autoclaveexpansionorcontraction,max,%

Uniformityrequirements:

Thedensityandfinenessofindividualsamples

shallnotvaryfromtheaverageestablishedbythe

tenprecedingtests,orbyallprecedingtestsifthe

numberislessthanten,bymorethan:

Density,maxvariationfromaverage,%

Percentretainedon45-µm(No.325),maxvariation,

percentagepointsfromaverage

A

F

34

75

B

75

B

105

0.8

C

34

75

B

75

B

105

0.8

34

75

B

75

B

115

0.8

5

5

5

5

5

5

Thestrengthactivityindexwithportlandcementisnottobeconsideredameasureofthecompressivestrengthofconcretecontainingtheflyashornaturalpozzolan.

Themassofflyashornaturalpozzolanspecifiedforthetesttodeterminethestrengthactivityindexwithportlandcementisnotconsideredtobetheproportion

imumamountofflyashornaturalpozzolanforanyspecificprojectisdeterminedbytherequiredproperties

oftheconcretthactivityindexwithportlandcementisameasureofreactivitywithagiven

cementandissubjecttovariationdependingonthesourceofboththeflyashornaturalpozzolanandthecement.

B

Meetingthe7dayor28daystrengthactivityindexwillindicatespecificationcompliance.

C

Iftheflyashornaturalpozzolanwillconstitutemorethan20%bymassofthecementitiousmaterialintheprojectmixture,thetestspecimensforautoclaveexpansion

iveautoclaveexpansionishighlysignificantincaseswherewatertocementitiousmaterialratiosarelow,forexample,

inblockorshotcretemixtures.

oneachdonotpredicttheperformanceoftheflyashornaturalpozzolan

withhydrauliccementinconcrete,butcollectivelyhelpdescribecompo-

sitionanduniformityofthematerial.

ion

10.1Thepurchaserhastherighttorejectmaterialthatfails

toconformtotherequirementsofthisspecifiion

shallbereportedtotheproducerorsupplierpromptlyandin

writing.

10.2Thepurchaserhastherighttorejectpackagesvarying

morethan5%chaseralsohas

therighttorejecttheentireshipmentiftheaverageweightof

thepackagesinanyshipment,asshownbyweighing50

packagestakenatrandom,islessthanthatspecified.

10.3Thepurchaserhastherighttorequirethatmaterialin

storagepriortoshipmentforaperiodlongerthan6months

chaserhastherighttoreject

suchmaterialifitfailstomeetthefinenessrequirements.

ingandPackageMarking

11.1Whentheflyashornaturalpozzolanisdeliveredin

packages,theclass,name,andbrandoftheproducer,andthe

weightofthematerialcontainedtherein,shallbeplainly

rinformationshallbeprovided

alProperties

7.1Flyashandnaturalpozzolansshallconformtothe

mentary

optionalphysicalrequirementsareshowninTable3.

sofSamplingandTesting

8.1Sampleandtesttheflyashornaturalpozzolanin

accordancewiththerequirementsofTestMethodsC311.

8.2Usecementofthetypeproposedforuseinthework

and,ifavailable,fromthemillproposedasthesourceofthe

cement,inalltestsrequiringtheuseofhydrauliccement.

eandInspection

9.1Theflyashornaturalpozzolanshallbestoredinsucha

mannerastopermiteasyaccessforproperinspectionand

identificationofeachshipment.

9.2Inspectionofthematerialshallbemadeasagreedupon

bythepurchaserandtheselleraspartofthepurchasecontract.

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C618−12a

TABLE3SupplementaryOptionalPhysicalRequirements

N

OTE

1—Theseoptionalrequirementsapplyonlywhenspecificallyrequested.

Class

N

Increaseofdryingshrinkageofmortarbarsat28days,max,difference,in%,

overcontrol

A

UniformityRequirements:

Inaddition,whenair-entrainingconcreteisspecified,thequantityofair-

entrainingagentrequiredtoproduceanaircontentof18.0vol%ofmortar

shallnotvaryfromtheaverageestablishedbythetenprecedingtestsorbyall

precedingtestsiflessthanten,bymorethan,%

EffectivenessinControllingAlkali-SilicaReaction:

B

Expansionoftestmixtureaspercentageoflow-alkalicementcontrol,at14

days,max,%

EffectivenessinContributingtoSulfateResistance:

C

ProcedureA:

Expansionoftestmixture:

Formoderatesulfateexposureafter6monthsexposure,max,%

Forhighsulfateexposureafter6monthsexposure,max,%

ProcedureB:

Expansionoftestmixtureasapercentageofsulfateresistancecement

controlafteratleast6monthsexposure,max,%

A

B

F

0.03

C

0.030.03

202020

100100100

0.10

0.05

100

0.10

0.05

100

0.10

0.05

100

Determinationofcomplianceornoncompliancewiththerequirementrelatingtoincreaseindryingshrinkagewillbemadeonlyattherequestofthepurchaser.

Flyashornaturalpozzolansmeetingthisrequirementareconsideredaseffectiveincontrollingalkalisilicareactionsastheuseofthelow-alkalicontrolcementused

r,theflyashornaturalpozzolanshallbeconsideredeffectiveonlywhenusedatpercentagesbymassofthetotalcementitiousmaterialequal

toorexceedingthatusedinthetestsandwhenthealkalicontentofthecementtobeuseddoesnotexceedthatusedinthetestsbymorethan0.05%.SeeAppendix

XI,TestMethods

C311.

C

Flyashornaturalpozzolanshallbeconsideredeffectiveonlywhentheflyashornaturalpozzolanisusedatpercentages,bymass,ofthetotalcementitiousmaterial

within2%ofthosethataresuccessfulinthetestmixturesorbetweentwopercentagesthataresuccessful,andwhentheC

3

Acontentoftheprojectcementislessthan,

orequalto,endixX2ofTestMethodC311.

intheshippinginvoicesaccompanyingtheshipmentofpack-

agedorbulkmaterial.

er’sCertification

12.1Uponrequestofthepurchaser,inthecontractorthe

order,asupplier’sreportshallbefurnishedstatingtheresults

oftestsmadeonsamplesofthematerialandcertifyingthe

productconformstoallapplicablerequirementsofthisspeci-

fition,thereportshallincludethepercentagesof

magnesiumoxide(MgO),sodiumoxide(Na

2

O),potassium

oxide(K

2

O),andcalciumoxide(CaO),alldeterminedas

ortshallalsoinclude

thetotalalkalicontentofthematerial,expressedasequivalent

percentageofsodiumoxide(Na

2

Oe).

N

OTE

5—Guidanceonpreparingthesupplier’sreportisprovidedin

AppendixX1.

ds

13.1flyash;naturalpozzolan;pozzolans

APPENDIX

(NonmandatoryInformation)

ER’SCERTIFICATIONREPORT

X1.1Toprovideuniformityforreportingtheresultsoftests

performedonpozzolansunderthisspecification,andaffirming

compliancetotheapplicablelimitsofthisstandard,anex-

amplereportofanalysisisshowninFig.X1.1.

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