基于渗透性的混凝土力学和耐久性能指标相关性试验

Experiment on the Correlation of Chloride Diffusion Coefficient with Mechanical and Durability Index of Concrete with Supplementary Cementitious Materials

通过开展掺矿物掺和料混凝土力学和耐久性能指标的试验测试,研究不同龄期混凝土氯离子扩散系数与单方水泥用量、单方胶凝材料用量、立方体抗压强度、碳化深度以及动弹性模量间的相关关系.试验结果表明:单方胶凝材料用量与84 d龄期混凝土氯离子扩散系数线性相关性良好;混凝土氯离子扩散系数均随立方体抗压强度的提高而降低,84 d立方体抗压强度与不同龄期混凝土氯离子扩散系数线性相关性良好;混凝土氯离子扩散系数均随碳化深度的提高而提高,碳化深度与84 d龄期混凝土氯离子扩散系数线性相关性良好;不同龄期混凝土氯离子扩散系数均随84 d龄期动弹性模量的提高而降低.

Through test on mechanical and durability index of concrete with supplementary cementitious mate-rials, the correlation of chloride diffusion coefficients at different ages with cement amount per cube meter, ce-mentitious materials amount per square meter, cube crushing strength, carbonation depth and dynamic elastic modulus are studied. The test results show that 84d chloride diffusion coefficient has a good linear correlation with cementitious materials amount per square meter. Chloride diffusion coefficients at different ages all re- duced with the increase of cube crushing strength, and chloride diffusion coefficients at different ages all have a good linear correlation with 84d cube crushing strength. Chloride diffusion coefficients at different ages all increased with the increase of carbonation depth, and 84d chloride diffusion coefficient has a good linear corre-lation with carbonation depth. Chloride diffusion coefficients at different ages all reduced with the increase of 84d dynamic elastic modulus.