十文獻(xiàn)翻譯原文

安徽工業(yè)大學(xué)大學(xué)畢業(yè)設(shè)計(jì)（論文）計(jì)算書第122頁共132頁58 CHAPTER5CODE COMMENAYbemaintainedthroughthe58 CHAPTER5CODE COMMENAYbemaintainedthroughthenormalcompressestrengthtestrequirementsprvidedy—SelectionofconcretepoportionsR5.2—SelectionofconcetepoportionsRecommendationsforselectingproportionsforconcretearegenindetailin“StandardPracticeorSelectingPo-portionsorNormal,Hevyweight,andMassConcete”(CI211.1).5.1(Prvidestomethodsforselectingandadjustingproportionsfornormaweightconcrete:theesti-matedweightandabsoluteolumemethods.Examplecal-culationsareshwnforbothmethods.Proportioningofhevyweightconcreteytheabsoluteolumemethodispresentedinanappendix.)Recommendationsforlightweightconcretearegenin“StandardPracticeorSelectingPoportionsorStruc-turalLightweightConcete”(CI211.2).5.2(Prvidesamethodofproportioningandajustingstructuralgradecon-cretecontaininglightweightaggrates.)5.2.1—Proportionsofmaterialsorconcreteshallbeestalishedtoprvide:(a)orkabilityandconsistencytopermitconcretetobeoredreadilyintoormsandaroundreinorce-mentunderconditionsofplacementtobeempled,withoutseregationorxcessieleeding;(b)ResistancetospecialxposuresasrequiredyChapter4;(c)Conormancewithstrengthtestrequirementsof5.6.R5.2.1—edsldew,rneefteehhhoyheae3r)deler.eestesrye,hssrh,stdhcshs.esedeefeededynetesdseoedoemsdneedesfet5.2.2—Wherediferentmaterialsaretobeusedordiferentportionsofproposedork,eachcombinationshallbealuated.5.2.3—Concreteproportionsshallbeestalishedinaccordancewith5.3o,alternatiel,5.4,andshallmeetapplicalerequirementsofChapter4.R5.2.3—Thecodeemphasizestheuseofieldxperienceorlaboratorytrialmixtures(see5.3)asthepreferredmethodforselectingconcretemixtureproportions.5.3—Poportioningonthebasisoffielderl,rR5.3—Poportioningonthebasisofieldexperienceortrialmixtues,orbothngaeeeeee.etsenfee.edsenfeee.edsenesdoet,ryllesyaee..3sawtgeendndurCopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MSTCHAPTER5 59COMMENACHAPTER5 59COMMENAYi.R5.3—FlowhartforselectionanddocumentationofconcetepoportionsCopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MSTCODECOMMENAYCODECOMMENAY60 CHAPTER5CODE COMMENAYThemixtureselectedshouldyieldaneragestrengthappreciablyhigherthanthespeciiedstrengthf′60 CHAPTER5CODE COMMENAYThemixtureselectedshouldyieldaneragestrengthappreciablyhigherthanthespeciiedstrengthf′.Thedgreeofmixtureerdesigndependsontheariabilityofthetestresults.5.3.1—SamplestandaddviationR5.3.1—Samplestandarddviation1—eaenyt,aed,s,l.tsmhss(a)Shallrepresentmaterial,qualitycontrolproce-naenysaed0esfrsd,eed,,sdesnehegdure,andconditionssimilartothosexpectedand21?2changesinmaterialsandproportionswithinthetestrecordsshallnothebeenmorerestrictedthanthoseorproposedork;(b)Shallrepresentconcreteproducedtomeetawhere:ss=Σ(xi–x) -(n–1) specifiedcompressiestrengthorstrengthswithin7Maoff′;(c)Shallconsistofatleast30consecutietestsortoroupsofconsecutieteststotalingatleast30testsasdefinedin,xceptasprvidedin.—Whereaconcreteproductionacilitydoesnothetestrecordsmeetingrequirementsof,utdoeshearecordbasedon15to29consecutietest,asamplestandarddviationssshallbeestab-lishedastheproductofthecalculatedsamplestan-ss=samplestandarddviation,Maxi=indvidualstrengthtestsasdeinedinx =erageofnstrengthtestresultsn =numberofconsecutestrengthtestsThesamplestandarddviationisusedtodeterminetheeragestrengthrequiredin.Iftotestrecordsareusedtoobtainatleast30tests,thesamplestandarddviationusedshallbethestatisticalerageofthealuescalculatedfromeachtestrecordinaccordancewiththefollwingformula:darddviationandmodificationactorofale. (n–1)(s)221?2+(n2–1)(ss2)ss=(n+n–2) obeacceptal,testrecordsshallmeetrequire-ments(a)and(b)of,andrepresentonlyasin-glerecordofconsecutieteststhatspanaperiodofnotlessthan45calendardy.where:12ABLE—MODIFICTIONCORFORss=statisticalaveragestandarddviationwheretwotestrecordsareusedtoestimatethesam-plestandarddviationSAMPLESANARDDEVITIONWHENLESSTHAN30TESTSAREAILABLEModificationactororsampless1,ss2=samplestandarddviationscalculatedfromtotestrecords,1and2,respectelyn1,n2=numberoftestsineachtestrecord,respectelyN.oftests*standarddviation?Lessthan15 Usetale15 1.1620 1.0825 1.0330ormore 1.00*Interpolateorintermediateumbersoftest.?Modifiedsamplestandarddviation,ss,tobeusedtodeterminerequiredeagestrength,fc′,from.Iflessthan30,utatleast15testsareailable,thecalcu-latedsamplestandarddviationisincreasedytheactorgeninable.Thisprocedureresultsinamorecon-serate(increased)requirederagestrength.Theactorsinablearebasedonthesamplingdistriutionofthesamplestandarddviationandprvideprotection(equa-lenttothatfromarecordof30tests)aainstthepossibilitythatthesmallersampleunderestimatesthetrueorunersepopulationstandarddviation.Thesamplestandarddviationusedinthecalculationofrequirederagestrengthshouldbedelopedundercondi-tions“similartothosexpected”[see(a)].Thisrequirementisimportanttoensureacceptableconcrete.CopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MSTCHAPTER5 61CODE COMMENAYConcreteforbackgroundteststodeterminesamplestandarddviationisconsideredtobe“similar”tothatrequiredifmadewiththesameCHAPTER5 61CODE COMMENAYConcreteforbackgroundteststodeterminesamplestandarddviationisconsideredtobe“similar”tothatrequiredifmadewiththesamegeneraltypesofingredientsundernomorerestricteconditionsofcontrolermaterialqualityandproductionmethodsthanontheproposedork,andifitsspeciiedstrengthdoesnotdviatemorethan7Mafromthef′required[see(b)].Achangeinthetypeofconcreteoramajorincreaseinthestrengthlelmayincreasethesamplestandarddviation.Suchasituationmightoccurwithachangeintypeofaggrgate(i.e.,fromnaturalaggrgatetolightweightaggrgateorviceersa)orachangefromnon-ai-entrainedconcretetoai-entrainedconcrete.Also,theremaybeanincreaseinsamplestan-darddviationwhentheeragestrengthlelisraisedyasigniicantamount,althoughtheincrementofincreaseinsamplestandarddviationshouldbesomwhatlessthandirectlyproportionaltothestrengthincrease.Whenthereisreasonabledoubt,ayestimatedsamplestandarddvia-tionusedtocalculatetherequirederagestrengthshouldalwaysbeontheconserate(high)side.Notethatthecodeusesthesamplestandarddviationinpoundspersquareinchinsteadofthecoeicientofariationinpercent.Thelatterisequaltotheformerxpressedasapercentoftheeragestrength.Eenwhentheeragestrengthandsamplestandarddvia-tionareofthelelsassumed,therewillbeoccasionalteststhatailtomeettheacceptancecriteriaprescribedin(perhaps1testin100).5.3.2—RequiredvergestrengthR5.3.2—Requiederagestength—Requiredeagecompressiestrengthc′usedasthebasisorselectionofconcretepropor-tionsshallbedeterminedfromaeusingthesamplestandarddviation,ss,calculatedinaccor-dancewithor.ABLE—REUIREDVERGECOMPRES-SIVESTRENGTHWHENAAREAILABLEOESABLISHASAMPLESANARDDEVITIONR—Oncethesamplestandarddviationhasbeendetermined,therequirederagecompressestrength,f′,isobtainedfromthelageraluecomputedfromEq.(5-1)and(5-2)forfc′of35MPaorless,orthelargeraluecomputedfromEq.(5-1)and(5-3)forf′er35MaEquation(5-1)isbasedonaprobabilityof1-in-100thattheerageofthreeconsecutetestsmaybebelwthespeci-iedcompressestrengthf′.Equation(5-2)isbasedonasimilarprobabilitythatanindvidualtestmaybemorethan3.5Mabelwthespeciiedcompressestrengthfc.Equa-Specifiedcompressiestrength,MaRequiredeagecompressiestrengt,MaUsethelargeraluecomputedfromEq.(5-1)and(5-2)tion(5-3)isbasedonthesame1-in-100probabilitythatanindvidualtestmaybelessthan0.90f′.Theseequationsassumethatthesamplestandarddviationusedisequaltofc′≤35f′=f′+1.34s(5-1)thepopulationalueappropriateforanininiteorerylagecrfcrccssnumberoftests.orthisreason,useofsamplestandard′=f′+2.33s–3.5 (5-2)Usethelargeraluecomputeddviationsestimatedfromrecordsof100ormoretestsisfc′>35′fromEq.(5-1)and(5-3)′desirable.When30testsareailable,theprobabilityofail-fcr=fc+1.34ss (5-1)urewilllilybesomwhatgreaterthan1-in-100.Theaddi-′=0.90f′+2.33s(5-3)fcrcstionalrenementsrequiredtoachiethe1-in-100probabilityarenotconsideredncessar,becauseoftheuncertaintyinherentinassumngthatconditionsoperatingwhenthetestrecordasaccumulatedwillbesimilartocon-ditionswhentheconcrtewillbeproduced.CopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MST62 CHAPTER5CODE COMMENAY—Whenaconcreteproduction62 CHAPTER5CODE COMMENAY—Whenaconcreteproductionacilitydoesnothefieldstrengthtestrecordsorcalculationofssmeetingrequirementsofor,fc′shallbedeterminedfromaleanddocumentationofeagestrengthshallbeinaccordancewithrequirementsof5.3.3.ABLE—REUIREDVERGECOMPRESSIVESTRENGTHWHENAARENTAILABLEOESABLISHASAMPLESANARDDEVITIONSpecifiedcompressiestrength,MaRequiredeagecompressiestrength,Ma′=f′+7f′<21 f′=f′+8.321≤f′≤35 f′=1.10f′+5f′>35 f5.3.3—DocumentationofvergecompressivestrengthR.5.3.3—DocumentationoferagecompessestengthDocumentationthatproposedconcreteproportionswillproduceaneagecompressiestrengthequaltoorreaterthanrequiredeagecompressiestrengthf′ (see5.3.2)shallconsistofafieldstrengthtestrecord,sealstrengthtestrecord,ortrialmixture.Oncetherequirederagecompressestrengthc′isknwn,thenxtstepistoselectmixtureproportionsthatwillproduceaneragestrengthatleastasgreatastherequirederagestrength,andalsomeetspecialxposurerequirementsofChapter4.Thedocumentationmayconsistofastrengthtestrecord,seralstrengthtestrecords,orsuitablelaboratoryorieldtrialmixtures.Generall,ifatestrecordisused,itwillbethesameonethatasusedforcomputationofthestandarddviation.Hwe,ifthistestrecordshwseitherlwerorhighereragecompressestrengththantherequirederagecompressestrength,diferentproportionsmaybenecessaryordesirable.Insuchinstances,theeragefromarecordofasfwas10testsmaybeused,ortheproportionsmaybeestablishedyinter-polationbetweenthestrengthsandproportionsoftosuchrecordsofconsecutetests.Alltestrecordsforestablishingproportionsnecessarytoproducetheeragecompressestrengtharetomeettherequirementsoffor“similarmaterialsandconditions”—Whentestrecordsareusedtodemon-statethatproposedconcreteproportionswillproducefc′(see5.3.2),suchrecordsshallrepresentmaterialsandconditionssimilartothosexpected.Changesinmaterial,condition,andproportionswithinthetestrecordsshallnothebeenmorerestrictedthanthoseorproposedork.orthepurposeofdocumentingeagestrengthpotential,testrecordsconsistingoforstrengthser35Mawheretheeragecompressestrengthdocumentationisbasedonlaboratorytrialmix-tures,itmaybeappropriatetoincreasef′calculatedinabletoallwforareductioninstrengthfromlabo-ratorytrialstoactualconcreteproduction.CopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MSTCHAPTER5 63CODE COMMENAYlessthan30utnotlessthan10consecutietestsareacceptaCHAPTER5 63CODE COMMENAYlessthan30utnotlessthan10consecutietestsareacceptaleprvidedtestrecordsencompassaperiodoftimenotlessthan45dy.Requiredconcretepro-portionsshallbepermittedtobeestalishedyinter-polationbeteenthestrengthsandproportionsoftoormoretestrecord,eachofwhichmeetsotherrequirementsofthissection.—Whenanacceptalerecordoffieldtestresultsisnotailal,concreteproportionsestab-lishedfromtrialmixturesmeetingtheollwingrestric-tionsshallbepermitted:(a)Materialsshallbethoseorproposedork;(b)rialmixtureshvingproportionsandconsisten-ciesrequiredorproposedorkshallbemadeusingatleastthreediferentater-cementitiousmaterialsatiosorcementitiousmaterialscontentsthatwillproduceaangeofstrengthsencompassingf′;(c)rialmixturesshallbedesignedtoproduceaslumpwithin±20mmofmaxiumpermitted,andorair-entainedconcret,within±0.5percentofmaxiumallaleaircontent;(d)oreachater-cementitiousmaterialsatioorcementitiousmaterialscontent,atleastthreetestcylindersoreachtestageshallbemadeandcuredinaccordancewith“StandardPacticeorMakingdgetsnerMC.sledt8orattestagedesignatedordeterminationoffc;(e)romresultsofcylindertestsacureshallbeplottedshwingtherelationshipbeteenater-ssorscontentandcompressiestrengthatdesignatedtestage;(f)Maxiumater-cementitiousmaterialatioorminiumcementitiousmaterialscontentorcon-cretetobeusedinproposedorkshallbethatshwnythecuretoproducef′requiredy5.3.2,unlessalerater-cementitiousmaterialsatioorhigherstrengthisrequiredyChapter4.5.4—PoportioningwithoutfieldxperienceortrialmixturesR5.4—Poportioningwithoutieldexperienceortrialmixtues5.4.1—Ifdatarequiredy5.3arenotailal,con-creteproportionsshallbebaseduponotherxperi-enceorinormation,ifappredytheregistereddesignproessional.Therequiredeagecompres-siestrengthf′ofconcreteproducedwithmaterialsR5.4.1—Whennopriorxperience()ortrialmix-turedata()meetingtherequirementsofthesesec-tionsisailable,otherxperiencemaybeusedonlywhenspecialpermissionisgen.Becausecombinationsofdifer-entingredientsmayaryconsiderablyinstrengthll,thisCopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MST64 CHAPTER5CODE COMMENAYsimilartothose64 CHAPTER5CODE COMMENAYsimilartothoseproposedoruseshallbeatleast8.3Mareaterthanf′.Thisalternatieshallnotbeusediff′isreaterthan35Ma.5.4.2—ConcreteproportionedythissectionshallconormtotheduabilityrequirementsofCcedureisnotpermittedforfc′greaterthan35Maandtherequirederagecompressestrengthshouldxceedfc′y8.3Ma.Thepurposeofthisprvisionistoallworktocontinuewhenthereisanunxpectedinterruptionincon-cretesupplyandthereisnotsuicienttimefortestsandaluationorinsmallstructureswherethecostoftrialmix-turedataisnotjustiied.5.5—vergecompressivestrengthreductionAsdatabecomeailaeduringconstruction,itshallbepermittedtoreducetheamountywhichtherequiredeageconcretestrength,fc′,ustxceedfc,prvided:(a)Thirtyormoretestresultsareailaleander-ageoftestresultsxceedsthatrequiredy,usingasamplestandarddviationcalculatedinaccordancewith;or(b)Fifteento29testresultsareailaleander-ageoftestresultsxceedsthatrequiredyusingasamplestandarddviationcalculatedinaccordancewith;and(c)lesfr4e6—ndefR5.6—EaluationandacceptanceofconceteOncethemixtureproportionshebeenselectedandthejobstarted,thecriteriaforaluationandacceptanceofthecon-cretecanbeobtainedfrom5.6.Aneforthasbeenmadeinthecodetoprvideaclea-cutbasisforjudgingtheacceptabilityoftheconcrete,aswellastoindicateacourseofactiontobefollwedwhentheresultsofstrengthtestsarenotsatisactor.5.6.1—Concreteshallbetestedinaccordancewiththerequirementsof5.6.2through5.6.5.Qualifiedfieldtestingtechniciansshallperormtestsonfreshcon-creteatthejobsit,preparespecimensrequiredorcuringunderfieldcondition,preparespecimensrequiredortestinginthelaboator,andrecordthetempeatureofthefreshconcretewhenpreparingspecimensorstrengthtest.Qualifiedlaboatorytechniciansshallperormallrequiredlaboatorytest.R5.6.1—Laboratoryandieldtechnicianscanestablishqualiicationsybecomingcetiiedthroughcertiicationprograms.Fieldtechniciansinchageofsamplingconcrete;testingforslump,unitweight,yield,aircontent,andtem-perature;andmakingandcuringtestspecimensshouldbecertiiedinaccordancewiththerequirementsofCICon-creteFieldestingechnician—Grade1CertiicationPro-gram,ortherequirementsofASTMC1077,5.3oranequalentprogram.Concretetestinglaboratorypersonneldednehesfeyg,eg,resfMCCopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSestingreportsshouldbepromptlydistriutedtothewne,rgistereddesignprofessionalresponsibleforthedesign,contracto,appropriatesubcontractors,appropriatesuppli-ers,anduildingoicialtoallwtimelyidentiicationofeithercomplianceortheneedforcorrecteaction.Licensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MSTCHAPTER5 65CODE COMMENAY5.6.2—FrequenyoftestingR5.6.2—Fequencyoftesting—SamplesCHAPTER5 65CODE COMMENAY5.6.2—FrequenyoftestingR5.6.2—Fequencyoftesting—Samplesorstrengthtestsofeachclassofconcreteplacedeachdyshallbetaennotlessthanoncead,norlessthanonceoreach110m3ofconcret,norlessthanonceoreach460m2ofsur-aceareaorslabsorall.R—Thefollwingthreecriteriaestablishtherequiredminimumsamplingfrequenyforeachclassofconcrete:(a)Onceeachdayagenclassisplaced,norlessthan(b)Onceforeach110m3ofeachclassplacedeachda,norlessthan(c)Onceforeach460m2ofslaborallsuraceareaplacedeachda.Incalculatingsuracearea,onlyonesideoftheslaborallshouldbeconsidered.Criteria(c)willrequiremorefrequentsamplingthanonceforeach110m3placediftheeragellorslabthicknessislessthan245mm.—Onagienproject,iftotalolumeofcon-creteissuchthatfrequencyoftestingrequiredyouldprvidelessthanfiestrengthtestsoragienclassofconcret,testsshallbemadefromatleastfieandomlyselectedbatchesorfromeachbatchiferthanfiebatchesareused.R—Samplesforstrengthtestsaretobetaenonaymsfyeoeyyfe.oe,efsf,resfeoeeoeenesfe,nef.sdtednes,,rrydeelsler.enetefosema,)denmae,dytedoeereesASTMD36655.4describesproceduresforrandomselectionofthebatchestobetested.—Whentotalquantityofagienclassofconcreteislessthan38m3,strengthtestsarenotre-quiredwhenvidenceofsatsactorystrengthissub-mittedtoandappredytheuildingofficial.—Astrengthtestshallbetheeageofthestrengthsoftocylindersmadefromthesamesampleofconcreteandtestedat28dysorattestagedesig-natedordeterminationoffc′.5.6.3—Laboratory-curedspecimensR5.6.3—Laboratory-cuedspecimens—Samplesorstrengthtestsshallbetaeninaccordancewith“StandardPacticeorSamplingreshlyMiedConcrete”(ASTMC172).2—srhsleandlaboatory-curedinaccordancewith“StandardergdgetintheField”(ASTMC31M)andtestedinaccordancewith“StandardestMethodorCompressieStrengthofCylindricalConcreteSpecimens”(ASTMC39M).CopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/5910842100NotforResale,11/28/200518:20:15MST66 CHAPTER5CODE COMMENAY—Strengthlelofanindividualclass66 CHAPTER5CODE COMMENAY—Strengthlelofanindividualclassofconcreteshallbeconsideredsatisactoryifbothoftheollwingrequirementsaremet:(a)Eeryarithmeticeageofaythreeconsecu-tiestrengthtestsequalsorxceedsfc′;3—Aetfasnrfhdseoledndnehe,sfd.eehsdoeysgssfyeesneedf′dol′yen5aff′tswedcc′yen0tff′(b)Noindividualstrengthtest(eageoftocylin-35Mar,rswccders)allsbelwfc′ymorethan3.5Mawhenfc′is35Maorless;orymorethan0.10fc′whenfc′ismorethan35Ma.iser35Ma.Ealuationandacceptanceoftheconcretecanbejudgedimmediatelyastestresultsarereceeddur-ingthecourseoftheork.Strengthtestsailingtomeetthesecriteriawilloccuroccasionally(probablyaboutoncein100tests)enthoughconcretestrengthanduniformityaresatisactor.Allanceshouldbemadeforsuchstatisti-callyxpectedariationsindecidingwhetherthestrengthlelbeingproducedisadequate.—Ifeitheroftherequirementsofisnotmet,stepsshallbetaentoincreasetheeageofsubsequentstrengthtestresult.Requirementsof5.6.5shallbeobseredifrequirementof(b)isnotmet.R—Whenconcreteailstomeeteitherofthestrengthrequirementsof5.6.33,stepsshouldbetaentoincreasetheerageoftheconcretetestresults.Ifsuicientconcretehasbeenproducedtoaccumulateatleast15tests,theseshouldbeusedtoestablishanwtageteragestrengthasdescribedin5.3.frn5senenesfn,ewthldetttseeldnelnf.feefeesentsrseldnelf,arenelsThestepstaentoincreasetheerageleloftestresultswilldependontheparticularcircumstances,utcouldincludeoneormoreofthefollwing:(a)Anincreaseincementitiousmaterialscontent;(b)Changesinmixtureproportions;)snrrlfsfp(d)Areductionindelerytime;(e)Closercontrolofaircontent;(f)Animprementinthequalityofthetesting,includingstrictcompliancewithstandardtestprocedures.Suchchangesinoperatingandtestingprocedures,orchangesincementitiousmaterialscontent,orslumpshouldnotrequireaformalresubmisionundertheproceduresof5.3;hwe,importantchangesinsourcesofcement,aggrates,oradmixturesshouldbeaccompaniedyvi-dencethattheeragestrengthlelwillbeimpred.sgsrsoeehesdeddreoetfM3yadyhsenCopyrightAmericanConcreteInstituteProvidedbyIHSunderlicensewithACINoreproductionornetworkingpermittedwithoutlicensefromIHSLicensee=Black&Veatch/591084210NotforResale,11/28/200518:20:15MSTCHAPTER5 67CODE COMMENAYnryCHAPTER5 67CODE COMMENAYnryn,Osey,lynm,teey,rr5.6.4—Field-curedspecimensR5.6.4—Field-cuedspecimens—Ifrequiredytheuildingofficial,resultsofstrengthtestsofcylinderscuredunderfieldcondi-tionsshallbeprvided.R—Strengthtestsofylinderscuredunderieldconditionsmayberequiredtochecktheadequayofcuringandprotectionofconcreteinthestructure.—Field-curedcylindersshallbecuredunderfieldconditionsinaccordancewith“PacticeorMakingandCuringConcreteestSpecimensintheField”(ASTMC31M).—Fieldcuredtestcylindersshalbemoldedatthesametimeandfromthesamesamplesaslabo-atory-curedtestcylinder.—Proceduresorprotectingandcuringcon-creteshallbeimpredwhenstrengthoffield-curedcylindersattestagedesignatedordeterminationoffc′islessthan85percentofthatofcompanionlaboa-tory-curedcylinder.The85percentlimitat