高温后再生混凝土受压强度退化及微观结构性能分析
发布时间：2018-07-27 18:38
【摘要】：为研究高温作用后再生混凝土受压强度退化机理及高温作用对再生混凝土微观结构的影响,配制C30全天然骨料混凝土和全再生骨料混凝土,观测了受0、300、400、500℃高温后两种混凝土的表观物理现象并测试其抗压强度,选取典型样本,利用超景深三维显微系统观察四种温度作用后两种混凝土的微观结构形貌,对比分析其骨料和砂浆的界面特征,从微观角度解释界面特征对其宏观受压破坏现象产生的影响。结果表明:当受热温度小于400℃时,再生混凝土强度损失率大于天然混凝土,天然混凝土抗压强度及温度稳定性较好;但当受热温度大于400℃时,再生混凝土强度损失率较小,高温稳定性较好;高温前后再生混凝土薄弱面破坏先后顺序相同。
[Abstract]:In order to study the mechanism of compressive strength degradation of recycled concrete under high temperature and the effect of high temperature on the microstructure of recycled concrete, C30 whole natural aggregate concrete and fully recycled aggregate concrete were prepared. The apparent physical phenomena and compressive strength of two kinds of concrete under high temperature of 0300400500 鈩，
本文编号：2148785
[Abstract]:In order to study the mechanism of compressive strength degradation of recycled concrete under high temperature and the effect of high temperature on the microstructure of recycled concrete, C30 whole natural aggregate concrete and fully recycled aggregate concrete were prepared. The apparent physical phenomena and compressive strength of two kinds of concrete under high temperature of 0300400500 鈩，
本文编号：2148785
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