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1、外文翻译Anti-CrackPerformanceofLow-HeatPortlandCementConcreteAbstract:Thepropertiesoflow-heatPortlandcementconcrete(LHC)werestudiedindetail.TheexperimentalresultsshowthattheLHCconcretehascharacteristicsofahigherphysicalmechanicalbehavior,deformationanddurability.C
2、omparedwithmoderate-heatPortlandcement(MHC),theaveragehydrationheatofLHCconcreteisreducedbyabout17.5%.Undersamemixingproportion,theadiabatictemperatureriseofLHCconcretewasreducedby2℃-3℃,andthelimitstensionofLHCconcretewasincreasedby10×10-6-15×10-6thanthatofMHC
3、.Moreover,itisindicatedthatLHCconcretehasabetteranti-crackbehaviorthanMHCconcrete.Keywords:low-heatportlandcement;massconcrete;highcrackresistance;moderate-heatportlandcement1IntroductionTheinvestigationoncrackofmassconcreteisahotproblemtowhichattentionhasbeen
4、paidforalongtime.Thecracksoftheconcreteareformedbymulti-factors,buttheyaremainlycausedbythermaldisplacementsinmassconcrete[1-3].Sothekeytechnologyonmassconcreteishowtoreducethermaldisplacementsandenhancethecrackresistanceofconcrete.Aswellknown,thehydrationheat
5、ofbondingmaterialsisthemainreasonthatresultsinthetemperaturedifferencebetweenoutsideandinsideofmassconcrete[4,5].Inordertoreducetheinnertemperatureofhydroelectricconcrete,severalmethodshavebeenproposedinmixproportiondesign.Theseincludeusingmoderate-heatportlan
6、dcement(MHC),reducingthecontentofcement,andincreasingthePortlandcement(OPC),MHChasadvantagessuchaslowheatofhydration,highgrowthrateoflong-termstrength,etc[6,7].SoitismorereasonabletouseMHCinapplicationofmassconcrete.Low-heatportlandcement(LHC),namelyhighbelite
7、cementiscurrentlyattractingagreatdealofinterestworldwide.ThisislargelyduetoitslowerenergyconsumptionandCO2emissioninmanufacturethanconventionalPortlandcements.LHChasalotofnoticeableproperties,suchaslowheatofhydrationexcellentdurability,etc,sothefurtherstudycon
8、tinuestobeimportant[8-10].Thelong-termstrengthofC2ScanapproachtoorevenexceedthatofC3S[11].Inaddition,C2ShasaseriesofcharacteristicssuperiortoC3S.TheseincludethelowcontentofCaO,lowh
