粉煤灰复合低热硅酸盐水泥混凝土的性能分析
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HE Lei
（Beijing Friendship Hospital， Capital Medical University，Beijing 1OOO50，China）
Abstract：Toimprove thestrengthandcrackresistanceof low heat Portlandcementconcrete，flyashcomposite low heat Portland cementconcrete wasprepared，andthecompressiveandflexural strength，thermodynamicproperties，andcrack resistanceunderdiferentapplicationenvironmentsweretested.Theresultsshowthat theaveragecompressivestrengthofflyash composite low heat Portland cement concrete is 53.33MPa ，and the average flexural strength is 4. 67 MPa，which is better than lowheatPortlandcementconcrete；Theheatreleaserate，heatrelease，andadiabatictemperatureriseofflyashcompositelow heatPortlandcementconcretearelowerthan thoseoflow heatPortlandcementconcrete，andthecrack resistanceis beterin three application environments ： constant temperature and humidity at 25‰ ，constant temperature and humidity at 35 C ，and constant temperature and continuous wind speed at 35C+10m/s .Therefore，fly ash composite low heat Portland cement concretecansignificantlyimproveitshydrationheatperformanceandsuppresscracking，makingitsuitableforengineeringfields with strict temperature control such as large volume concrete.
Key words： fly ash composite low heat portland cement； thermodynamics； crack resistance
0 引言
低热硅酸盐水泥凭借其水化热较低的特性，在大体积混凝土工程领域得到了广泛的应用。（剩余6176字）
