硅粉对中低掺量水泥土早期强度的影响

Influence of silica fume on early strength of middle and low-dosage of cement soil

以内蒙古河套地区粉质黏土为研究对象,通过对室内掺硅粉水泥土进行的无侧限抗压强度试验,探讨不同硅粉掺量、不同龄期对水泥土无侧限抗压强度的发展规律。试验研究表明:在水泥掺量一定的条件下,硅粉水泥土的无侧限抗压强度基本上是随龄期和硅粉掺量的增加而不断增加,可以明显地提高水泥土的强度。其中硅粉主要起微集料效应和形态效应。

Investigated silty clay experiment was conducted in Inner Mongolia Hetao Irrigation District in China, Through unconfined compres- sive strength test of soil-silica fume-cement in laboratory, its development rules in different silica fume contents and different curing ages are stud- ied.The experimental results indicate that the strength of cement-soil can significantly increase with silica powder contents an curing age under a certain cement content condition., and silica furne＇effect is morphological effect and micro-aggregate effect.