粉煤灰改良氯盐渍土变形性质的试验研究  

Experimental Research on the Improvement of Deformation of Chlorine Saline with Fly Ash

作　　者：马晓婷[1] 党进谦[1] 张超[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《中国农村水利水电》2010年第6期150-152,156,共4页China Rural Water and Hydropower

摘　　要：由于盐渍土中含盐量较高,其高压缩性及溶陷性对工程建设造成较大的影响和危害。用杨凌黄土室内配制含盐量为2%、5%、8%的氯盐渍土作为研究对象,掺入不同量的粉煤灰形成0、10%、15%、20%、25%等5种配比,分别进行压缩试验和溶陷试验,研究了粉煤灰掺入盐渍土,对盐渍土的压缩变形和溶陷系数产生的影响,结果表明粉煤灰掺量为20%时表现出最好的综合性能:较低的压缩变形,各含盐量综合比较最低的溶陷系数。Because of high salt content in saline soil,its high compressibility and lixiviation collapse have a tremendous influence on the engineering construction.This paper explores its deformation characteristics by using 2%,5%,8% of chlorine saline soil as an object of study,which is prepared with Yangling loess soil and NaCl,incorporating 0,10%,15%,20%,25% fly ash.By compression and collapsibility tests,deformation characteristics are studied on the influence of fly ash content.The possibility of improvement of saline with fly ash is put forward in terms of deformation.The experiment results show that when the fly ash accounts for 20%,the saline has best performance-lower compressibility,the lowest karst collapse coefficient among the chlorine saline with various salt contents.

关 键 词：盐渍土 粉煤灰掺量 压缩特性 溶陷系数 

分 类 号：TU411.3[建筑科学—岩土工程]