混凝土抗压强度与微观结构间的相关性试验

摘要

Cube crushing strength test and gas adsorption analysis of different grade mineral admixture concrete was carried out to analyze the re-gression relationship between cube crushing strength and microcosmic pore structure. Test results show that the microcosmic pore structure distribu-tion has important effect on concrete mechanical properties. Concrete cube crushing strength increases with the decrease of microcosmic pore struc-ture index such as surface area,pore volume and pore radius. Cube crushing strength in different ages all have a good linear correlation relationship or nonlinear regression relationship with microcosmic pore structure index.%开展不同强度等级矿物掺和料混凝土的立方体抗压强度试验和微观孔结构指标的气体吸附法分析，建立了混凝土立方体抗压强度与微观孔结构指标间的相关关系。试验结果表明：混凝土内部的微观孔结构分布对其力学性能具有重要的影响，混凝土的立方体抗压强度随微观孔结构指标如比表面积、孔体积、孔径等的下降而提高。不同龄期混凝土的立方体抗压强度与56 d龄期混凝土的微观孔结构指标呈良好的线性相关或非线性回归关系。