全再生骨料混凝土配合比设计与试验研究  

Experimental Study on Mix Design of Full-recycled-aggregate Concrete

作　　者：李晓克[1] 郭琦[1] 赵顺波[1] 李广欣[1] 苏延峰[1] 

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450045

出　　处：《华北水利水电学院学报》2013年第4期53-56,共4页North China Institute of Water Conservancy and Hydroelectric Power

基　　金：郑州市科技领军人才培育计划(096SYJH23105);生态建筑材料河南省高校重点实验室培育基地项目(豫教科外[2009]609号);生态建筑材料与结构工程河南省高校科技创新团队支持计划(13IRTSTHN002)

摘　　要：采用再生砂和再生粗骨料配制全再生骨料混凝土,对其拌合物的工作性能、立方体抗压强度、轴心抗压强度、劈裂抗拉强度和弹性模量进行了试验研究,分析了水灰比、砂率对混凝土的影响规律.结果表明:水灰比是影响全再生骨料混凝土力学性能的主要因素,存在调节混凝土拌合物工作性能和基本力学性能的合理砂率.与现行混凝土结构设计规范的混凝土基本力学性能取值规定比较,全再生骨料混凝土的轴心抗压强度可按规范取值,但其抗拉强度和弹性模量按规范取值则偏大.Using recycled sand and recycled coarse aggregate to prepare the full-recycled aggregate concrete,the workability of fresh concrete and the cubic and axial compressive strength,the splitting tensile strength and the elastic modulus are tested.The effects of water-cement ratio and sand ratio on concrete are analyzed.The results show that the water-cement ratio is still the main factor influencing the properties of full-recycled aggregate concrete,and the reasonable sand ratio may adjust the workability of fresh concrete and the basic mechanical properties of hardened concrete.Compared with the current design specification for concrete structures,the axial compressive strength of full-recycled aggregate concrete can be taken as the specified value,but the values of the tensile strength and elastic modulus is too large according to specifications.

关 键 词：全再生骨料混凝土 再生砂 再生粗骨料 配合比 拌合物工作性 强度 弹性模量 

分 类 号：TV422[水利工程—水工结构工程]