【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.更多还原

【Abstract】 In order to further promote the applications of recycled concrete in civil engineering,the mechanical properties of recycled concrete under uniaxial compression condition 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 deformation and elastic module of recycled concrete were analyzed.The equation of complete stress-strain curve for recycled concrete was established for the first time.Based on the analysis of interface microstructure of recycled concrete,a proposal that adding the mineral admixture can improve the strength and durability of recycled concrete is promoted.更多还原