【摘要】 对42组不同配合比的混凝土进行了氯离子扩散系数试验，分析了水胶比、矿物掺合料（粉煤灰、矿渣、硅灰）掺量和龄期对氯离子扩散系数的影响；在此基础上，建立了综合反映水胶比及矿物掺合料掺量的养护28 d混凝土的氯离子扩散系数计算式。计算式简单、实用，计算结果与试验结果符合良好，可用于海水环境混凝土结构耐久寿命的预测。更多还原

【Abstract】 Experiment is carried out on 42 groups of concrete specimens with different mix proportion,and the effect of mineral admixtures,including fly ash,slag and silica fume,and curing age on diffusion coefficient of chloride ions of concrete is studied.On this basis,equation relating diffusion coefficient of chloride ions of concrete cured for 28 d with mix proportion,content of mineral admixtures is presented.The proposed equation is simple and practical used in prediction of durable life of concrete structures in marine environment.更多还原