再生混凝土力学性能试验  

Experimental research on the mechanical properties of recycled concrete

作　　者：胡琼[1] 宋灿[1] 邹超英[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2009年第4期33-36,共4页Journal of Harbin Institute of Technology

基　　金：黑龙江省自然科学基金资助项目(D0314)

摘　　要：为在土木工程实践中进一步推广应用再生混凝土,进行再生混凝土单轴受压条件下力学性能试验研究.探讨水灰比、再生骨料类型、再生细骨料取代率以及基体混凝土强度等因素对再生混凝土受压力学性能的影响规律,获得再生混凝土应力-应变全曲线,分析峰值应力、峰值应变、横向变形系数以及弹性模量的变化规律,建立再生混凝土应力-应变全曲线方程.通过再生混凝土界面显微结构的分析,提出添加矿物掺合料可改善再生混凝土强度和耐久性的建议.In order to further promote the applicatbhs of recycled concrete in civil engineering, the mechanical properties of recycled concrete under uniaxial camp ression conditbn were studied in this paper The effects of water- cement ratio, types of the recycled aggregate which was indicated the strength of the waste concrete, the replacement ratio of recycled finer aggregate, as well as the strength of cement paste on the mechanical properties of recycled concrete were systematically investigated The stress - strain curves of recycled concrete were obtained and the rule of peak stress, peak strain, transverse defornation and elastic module of recycled concrete were analyzed The equation of complete stress- strain curve for recycled concrete was established for the first tine Based on the analysis of interface micro structure of recycled concrete, a proposal that adding the mineral admixture can inprove the strength and durability of recycled concrete is promoted.

关 键 词：再生骨料 再生混凝土 力学性能 显微结构 

分 类 号：TU528.571[建筑科学—建筑技术科学]