双掺粉煤灰硅粉对水泥土抗压强度影响试验研究

Silicon powder-experimental study on the influence of the fly ash to the strength of cement-soil

以吉林省延吉市砂土作为研究对象,对双掺硅粉—粉煤灰水泥土进行了无侧限抗压强度试验,分析不同粉煤灰、硅粉掺量以及各龄期对硅粉—粉煤灰水泥土抗压强度的影响,结果表明:随粉煤灰与硅粉掺量的增加,水泥土后期强度基本呈增大趋势,随着粉煤灰掺量的增加,早期抗压强度逐渐减小,后期抗压强度则明显提高,掺硅粉不仅显著改善水泥土早期抗压强度,且明显提高其后期抗压强度。

Taking the sand in Yanji city as the research object,we made an unconfined compressive strength test on the silica fume and fly ash cement. We studied on the effect of silica fume and fly ash cement compressive strength when it was mixed with different amount of fly ash and silica fume. The results showed that： the cement soil strength showed a trend of increase with the increase of fly ash and fume content,in the early stage,with the content of fly ash increasing,the comprehensive strength decreases gradually,but in the latter stage,it is obviously improved,silica fume can not only significantly improve the early strength of cement soil but also make great influence on the later strength.