混合砂高强高性能混凝土性能研究  

Study on the performance of the mixed sand high strength concrete

作　　者：孙江涛 吴定略 曹亮宏 沈卫国[2,3,4] 卢自立 吉晓莉 SUN Jiangtao;WU Dinglüe;CAO Lianghong;SHEN Weiguo;LU Zili;JI Xiaoli(Baoli Changda Engineering Co.,Ltd.,Guangzhou 510620,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;WUT-UC Joint Laboratory on Concrete Science and Technology,Wuhan 430070,China)

机构地区：[1]保利长大工程有限公司,广东广州510620 [2]武汉理工大学材料学院,湖北武汉430070 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [4]武汉理工——加州大学·伯克利混凝土科学与技术联合实验室,湖北武汉430070

出　　处：《混凝土》2019年第9期146-149,共4页Concrete

基　　金：2016年湖北省公路科技项目;广东省交通科技项目(2016-02-007,2012-03-006)

摘　　要：采用尾矿与机制砂复配制备混合砂高强混凝土,并对其工作性、力学性能和耐久性进行研究。试验结果表明,在机制砂中掺入20%的尾矿能够改善机制砂的级配;混合砂混凝土28 d抗压强度高达104 MPa,弹性模量高达64.1 GPa,且均高于相应机制砂混凝土;混合砂高强混凝土的工作性均优于相应的机制砂混凝土;混合砂高强混凝土抗氯离子渗透性能为最高级V级,抗冻等级远高于F400。The high strength mixed sand concrete was prepared by mixing tailings and manufactured sand,and the workability,mechanical properties and durability were analyzed.The results indicate that the incorporation of 20%tailings can improve the gradation of manufactured sand.28 d compressive strength and elastic modulus of mixed sand concrete reaches 104 MPa and 64.1 GPa respectively,and are both higher than the corresponding manufactured sand concrete,Workability of mixed sand high strength concrete are better than the corresponding manufactured sand concrete.The resistance to chloride ion permeability of mixed sand high strength concrete reaches the highest level V,the frost resistance grade is much higher than F400.

关 键 词：混合砂 机制砂 尾矿 混凝土 

分 类 号：TU528.01[建筑科学—建筑技术科学]