中文摘要：

通过室内扫描电镜（SEM）试验微观结构观测,探讨了不同的浮石粉掺量和不同养护龄期下水泥土强度增长的微观机理,实验结果表明：浮石粉的加入使得水泥复合土的强度先增加后减小,存在一个最佳掺量为8%,随养护龄期的增长,28d之后,水化反应仍然在继续,水泥复合土60d龄期的胶凝物质的数量比28d明显增长。

英文摘要：

By scanning electron microscopy（ SEM） test microstructure observation,discusses the different dosage and different curing ages of pumice to microcosmic mechanism of the soil strength increasing,the experimental results show that： the pumice to join makes the composite cement soil strength first increases then decreases,and there is an optimal dosage of 8%,along with the growth of the curing age,after 28 days,hydration reaction continues,cement composite soil age 60 days of gelling material than 28 days.