机制砂陶粒混凝土抗压性能试验研究  

Experimental study on compressive performances of manufactured-sand expanded shale concrete

作　　者：李长永[1,2] 陈淮[1] 赵顺波[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]华北水利水电学院土木与交通学院,河南郑州450011

出　　处：《广西大学学报（自然科学版）》2010年第4期688-692,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(50779018);郑州市科技领军人才培育计划项目(096SYJH23105);河南省高校创新人才培养工程培养对象项目(豫教高[2004]294号)

摘　　要：为了研究水泥用量、水灰比、砂率对机制砂陶粒混凝土立方体抗压强度、轴心抗压强度和弹性模量的影响，进行了机制砂陶粒混凝土抗压性能试验。结果表明：机制砂陶粒混凝土的立方体和轴心抗压强度在砂率较小时受水泥用量的影响较大，在砂率较大时受水泥用量的影响较小；弹性模量同时受到砂率和水泥用量的关联影响，存在着最佳砂率和水泥用量；相比于天然砂轻骨料混凝土，机制砂轻骨料混凝土的水泥用量较大；立方体和轴心抗压强度及弹性模量均随着水灰比的增大而降低。建议给出了拌合物工作性和强度均满足要求的LC35级机制砂陶粒混凝土的配合比（水泥用量460—520kg／m^3、水灰比0．35和砂率42％），可供实际工程应用参考。In order to study the effects of cement content, water to cement ratio and sand ratio on the cubic compressive strength, axial compressive strength and elastic modulus of the lightweight concrete composited with manufactured sand and expanded shale, the experiments on compressive properties were conducted. It is proved that the cubic and axial compressive strengths of the concrete are largely influenced by the cement content when the sand ratio is low and less influenced when the sand ratio is high. The elastic modulus is influenced by the interaction of sand ration and cement content. The optimum value of sand ratio and cement content exists definitely. Compared to the natural sand lightweight concrete, larger content of cement is needed for the manufactured sand lightweight concrete. The cubic and axial compressive strengths as well as the elastic modulus all decrease with the increase of water to cement ratio. A mix proportion with the cement content from 460 kg/m^3 to 520 kg/m^3, the water to cement ratio（ W/C）of O. 35 and the sand ratio of 42% is suggested which satisfies the technical requirements of fresh concrete workability and LC35 light- weight concrete strength.

关 键 词：轻骨料混凝土 机制砂 陶粒 抗压性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]