【摘要】 利用电加速测试方法系统探究了水胶比、硅粉掺量、骨料含量和龄期对混凝土氯离子扩散系数的影响。研究发现:在影响氯离子扩散系数的影响因素中,硅粉掺量和水胶比的影响最大,且会随着硅粉的掺入和水胶比的减小而大幅减小;从硅粉掺量对氯离子扩散系数的递减率看,硅粉的适宜掺量可达15%;氯离子扩散系数随骨料含量的增加而出现线性减小的趋势;硅粉混凝土氯离子扩散系数随龄期的递减效应主要出现在120 d内。更多还原

【Abstract】 The effects of water to binder ratio,silica fume content,aggregate content and curing age on the chloride diffusivity of concrete were systematically investigated by electric accelerated test.It was found that among the influencing factors on chloride diffusivity,the content of silica fume and water to binder ratio have the greatest impact,and greatly decrease with the addition of silica fume and decrease of water to binder ratio.According to the decreasing rate of silica fume content toward to chloride diffusivity,the appropriate content can reach 15%.The chloride diffusivity decreased linearly with the increase of aggregate content.The reduction effect of chloride diffusivity of silica fume concrete induced by curing age mainly occurred within 120 days.更多还原