复合水泥土抗渗性能的实验研究  

Study on Impervious Performance of Cement-soil

作　　者：庞文台[1] 申向东[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《硅酸盐通报》2012年第6期1617-1620,1625,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目(51069008);内蒙古高等学校重点科研项目(NJ09046)

摘　　要：水泥土已经广泛应用于公路、建筑、水利等领域,本文针对内蒙古河套地区粉质粘土,着重探讨水泥掺量、养护龄期、及掺加粉煤灰、石灰对水泥土抗渗性的影响,并通过电镜试验,分析水泥土及复合水泥土微观结构的变化。结果表明水泥掺量越大、龄期越长,水泥土抗渗性能越好,其微观原因是水泥土孔隙随着龄期的增长,数量减少,尺寸减小。单掺粉煤灰对水泥土抗渗性能影响较小,但是加入石灰就可以激发粉煤灰的火山灰作用,生成不溶于水的水化硅酸钙。本文针对河套地区粉质粘土得到抗渗性能良好的配比:水∶水泥∶粉煤灰∶石灰∶粉质粘土=1.45∶1.00∶0.15∶0.0375∶7.3625。这种配比相对粉煤灰水泥土提高抗渗性能50%以上。Cement-soil technique has been widely used in roads,construction,water conservancy and other fields.This paper studies the effects of permeability coefficient by changing the quantity of cement-soil content,age,fly ash,lime in Hetao area of Inner Mongolia,and analyzes the change of cement-soil microstructure by the electron microscope on permeability coefficient of the cement-soil.The result shows that the permeability coefficient is small if the quantity of cement content is large and the age is growth.Only mixing fly ash on content does little affect on the permeability coefficient of cement-soil,but the addition of lime can stimulate the fly ash clouds of ash role,generating insoluble in water hydration calcium silicate.This paper concludes good anti-permeability proportion focus on silty clay in He Tao area of Inner Mongolia.The proportion is water∶ cement∶ fly ash∶ lime∶ silty clay = 1.45∶ 1.00∶ 0.15∶ 0.0375∶ 7.3625.This ratio compares fly ash cement-soil decreasing permeability coefficient more than 50%.

关 键 词：水泥土 渗透系数 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]