氯盐对水泥固化土应力应变特性影响分析  

EXPERIMENTAL STUDY OF STRESS-STRAIN CHARACTERISTICS OF CEMENT TREATED CHLORATE SALT RICH CLAYS

作　　者：范礼彬[1] 章定文[1] 邓永锋[1] 刘松玉[1] 

机构地区：[1]东南大学交通学院,南京210096

出　　处：《工程地质学报》2012年第4期621-626,共6页Journal of Engineering Geology

基　　金：江苏省自然科学基金项目(SBK2011618);江苏省公路局资助项目

摘　　要：以人工制备的方法配制了不同氯盐含量的土样,并掺入不同含量的普通硅酸盐水泥对其进行固化处理。采用无侧限抗压强度试验对氯盐含量对水泥固化土的应力应变特征影响规律进行分析。试验结果表明:随着氯盐含量的增加,水泥固化土的无侧限抗压强度和变形模量降低,破坏应变随之增大,应力-应变关系曲线由脆性破坏向塑性破坏转化;增加水泥用量可以减缓氯盐对水泥固化土的不良影响;但水泥固化土变形模量与无侧限抗压强度的比值与氯盐含盐量大小无明显关系。This paper investigates the effect of chlorate salt on the stress-strain characteristics of cement stabilized soils. The clay with various sodium chloride salt concentrations is prepared artificially and stabilized by ordinary portland cement with different contents. A series of unconfined compressive strength tests of cement stabilized clay specimens after various curing periods are carried out in laboratory. The test results show that the chloride salt has adverse effects to the cement stabilized clay. The unconfined compression strength and deformation modulus of the cement treated clays decrease as the chloride salt content increases. The failure strain of cement treated clays increases as the chloride salt content increases. The stress-strain curves of cement stabilized clay change from brittle failure to ductile failure as the chloride salt content increases. However, the ratio of deformation modulus to the unconfined compressive strength of cement clay is independent to the chloride salt content.

关 键 词：氯盐 水泥固化 应力应变特性 无侧限抗压强度 变形模量 

分 类 号：TU443[建筑科学—岩土工程]