高强全轻混凝土基本性能试验研究  

Experimental Study on Basic Properties of High-Strength Full-Lightweight Concrete with Expanded-Shale

作　　者：李长永[1] 赵明爽[1] 陈彦磊 丁新新[1] 

机构地区：[1]华北水利水电大学土木与交通学院,郑州450011

出　　处：《河南大学学报（自然科学版）》2014年第6期749-752,共4页Journal of Henan University:Natural Science

基　　金：河南省教育厅科学技术研究重点项目(12A560008);河南省新型城镇建筑技术协同创新中心科研课题(教科技〔2013〕638号);河南省高校生态建筑材料与结构工程科技创新团队科研课题(13IRTSTHN002);华北水利水电大学研究生创新课题(YK2014-03)

摘　　要：采用陶粒和陶砂作为粗细骨料配置高强全轻混凝土,研究了水灰比和砂率对全轻混凝土拌合物工作性能、干表观密度、立方体抗压强度、轴心抗压强度、劈裂抗拉强度和轴心抗拉强度等基本性能的影响.结果表明：拌合物工作性能良好;不同配合比的全轻混凝土干表观密度在1 668.2～1 731.6 kg/m3范围内变化,密度等级为1 700;当水灰比由0.35减小至0.25时,全轻混凝土立方体抗压强度由45.6MPa增加到50.5MPa;砂率对全轻混凝土强度的影响较小;轴心抗压强度相对于立方体抗压强度的换算系数可取为0.92,劈裂抗拉强度相对于轴心抗拉强度的换算系数可取为0.52.Tests were carried out to study the basic properties such as workability of fresh concrete, dry apparent density, cubic compressive strength, axial compressive strength, splitting tensile strength and axial tensile strength of high strength full lightweight concrete with expanded-shale and lightweight sand, in which the changes of water- to-cement ratio and sand ratio were considered. The results show that the fresh concrete had good workability, the density grade of full-lightweight concrete belong to 1 700 class with dry apparent density changing from 1 668.2 kg/ m3 to 1 731.6 kg/m3 , the compressive strength of full-lightweight concrete increased from 45.6 MPa to 50.5 MPa while the water to cement ratio reduced from 0.35 to 0.25, the sand ratio had less influence on the strength of full lightweight concrete, the conversion coefficient of axial compressive strength to cubic compressive strength could be taken as 0.92, the conversion coefficient of splitting tensile strength to axial tensile strength could be taken as 0.52.

关 键 词：全轻混凝土 拌合物工作性能 干表观密度 抗压强度 抗拉强度 

分 类 号：TU528.2[建筑科学—建筑技术科学]