双掺粉煤灰和粉状高炉矿渣的自密实混凝土流变性能的研究  

Study on rheological properties of self-compacting concrete with fly ash and blast furnace slag

作　　者：许博 李传习[1] 何颖 XU Bo;LI Chuanxi;HE Ying(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China;Department of Architectural Engineering,Hunan Urban Construction Vocational and Technical College,Xiangtan 411101,China;Hunan Construction Engineering Group,Changsha 410004,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]湖南城建职业技术学院建筑工程系,湖南湘潭411101 [3]湖南建工集团,湖南长沙410004

出　　处：《混凝土》2022年第3期160-163,共4页Concrete

基　　金：湖南省自科基金项目“多室预制波形钢腹板工字梁组合箱梁静力学性能及拼装方法研究”(2018JJ5005)。

摘　　要：研究了以水泥,粉煤灰和粉状高炉矿渣为胶凝材料的自密实混凝土的工作性参数和流变参数,并分析了它们之间的关系。结果表明,掺入10%粉煤灰和矿粉的自密实混凝土的扩展度和T50分别为625 mm和6.4 s,此时混凝土流动性最小。掺入粉煤灰和矿粉均能提高混凝土的扩展度、L仪充填比、屈服应力和塑性黏度,其中粉煤灰对混凝土体系流动性的提高更为显著。随着扩展度的升高,混凝土屈服应力呈下降趋势,而T50与塑性黏度则呈正向的变化关系。The workability and rheological parameters of self-compacting concrete with cement,fly ash and blast furnace slag as cementitious materials are studied,and the relationship between them is analyzed.The results show that the slump flow and T50 of self-compacting concrete with 10%fly ash and slag are 625 mm and 6.4 s respectively,and the fluidity of concrete reaches the minimum.The addition of fly ash and slag can improve the slump flow,L-type instrument filling ratio,yield stress and plastic viscosity of concrete,and the improvement of concrete fluidity by fly ash is more significant.With the increase of slump flow,the yield stress of concrete decreases,while T50has a positive relationship with plastic viscosity.

关 键 词：自密实混凝土 粉煤灰 粉状高炉矿渣 工作性 流变性 

分 类 号：TU528.53[建筑科学—建筑技术科学]