低熱水泥摻量對混凝土絕熱溫升的影響

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WANG Wenfu12，ZHOU Xuan12，PENG Tao1，2，LI Mu12，LI Chunyi1，2

1. China State Construction Railway Investment & Engineering Group Co.，Ltd.，Nanchang 330O38，China； 2. China Construction Third Engineering Bureau Group Co.，Ltd.，Nanchang 33O038， China）

Abstract：Aslow-heatcement is widelyused inmass concrete，it is necessry tofurther optimize theadiabatictemperature riseperformanceoflow-heatconcretetoreducetheriskofcracking inmassconcrete.Byadjustingthecontentof low-heat cementandcombiningconcretemechanicaland thermaltests，thestudyinvestigatedtheimpactofthreecementcontentsonthe adiabatictemperatureriseandotherthermalandmechanicalpropertiesofconcrete.Theresultsindicatethatthecontentoflowheatcement hasasignificant efectontheadiabatic temperatureriseofconcrete.Compared withconcrete with acementcontent of ，the final temperature increase of concrete with a cement content of at 28 days is 23.7% higher.The impactofcementcontentonthe thermal andmechanical propertiesof low-heatcementconcreteis limited.Usingahigher cementcontent can achieve relativelysuperior mechanical properties.Compared with concrete with acement contentof ， thethermal conductivityand linear expansion coefficient are improved by 10.4% and 1.9% ，respectively，whenthe cement content is ，but the specific heat capacity is slightly reduced，with a decrease of about 2.3% ：

Keywords：cementitious material content；low-heat cement；concrete；adiabatic temperature rise；thermal property

0 引言

近年來，隨著國民經(jīng)濟快速發(fā)展，大體積混凝土結(jié)構(gòu)得到廣泛應(yīng)用。（剩余5355字）