基于膨润土、粉煤灰的水泥复合土抗剪强度研究  

Shear Strength of Cement Composite Soil Based on Bentonite and Fly Ash

作　　者：赵百超 陈四利 董凯赫 ZHAO Bai-chao;CHEN Si-li;DONG Kai-he(School of Architecture&Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;Higher Vocational Technology College,Anshan Normal University,Anshan 114011,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,沈阳110870 [2]鞍山师范学院高等职业技术学院,鞍山114011

出　　处：《硅酸盐通报》2019年第9期2882-2889,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51608332,51279109)

摘　　要：为了研究基于水泥、膨润土和粉煤灰的水泥复合土抗剪强度特性,设计了水泥复合土配合比,并利用正交试验进行了水泥复合土的抗剪强度试验,得到了抗剪强度指标参数-黏聚力和内摩擦角,探讨了水泥掺量、膨润土掺量和粉煤灰掺量对水泥复合土强度指标(黏聚力和内摩擦角)的影响,建立了水泥复合土的黏聚力和内摩擦角随水泥、膨润土和粉煤灰等掺量变化的回归方程,以及水泥复合土抗剪强度的归回方程,试验结果表明:随着水泥、膨润土以及粉煤灰的逐步增加,其黏聚力均逐渐增大,而内摩擦角均逐渐降低。水泥掺量对黏聚力影响程度最大,对内摩擦角影响相对偏小。而粉煤灰掺量和膨润土掺量的影响基本相同,对内摩擦角相对较大,对黏聚力影响较小。The mix ratio of cement composite soil was designed and the shear strength of cement composite soil was tested by orthogonal test in order to study the shear strength characteristics of cement composite soil based on cement,bentonite and fly ash.The shear strength index parameters-cohesion and internal friction angle were obtained.The effects of cement content,bentonite content and fly ash content on the strength index(cohesion and internal friction angle)of cement composite soil were discussed.The regression equation of cohesion and internal friction angle of cement composite soil with cement,bentonite and fly ash content were established,and the regression equation of shear strength of cement composite soil also were established.The results show that bentonite and fly ash,the cohesion increases gradually with the increase of cement,and the internal friction angle gradually decreased.Cement content has the greatest effect on cohesion and relatively small influence on internal friction angle.The effect of fly ash content and bentonite content is basically the same,the effect on internal friction angle is more greater compared with the effect on internal friction angle.

关 键 词：道路工程 水泥复合土 抗剪强度 水泥掺量 膨润土掺量 粉煤灰掺量 

分 类 号：TU411[建筑科学—岩土工程]