淤泥水泥土和填筑黄土的物理力学特性试验研究

全过程采用水泥砂浆试验设备和方法,研究了水灰比、水泥掺量、养护龄期对水泥固化淤泥土和填筑黄土试块的物理力学特性影响。结果表明,随水灰比和水泥掺量的增加,淤泥水泥土密度变化不大,而填筑黄土密度降低;淤泥水泥土随水泥掺量的增大,其无侧限抗压强度和抗剪强度明显增大;填筑黄土水泥土随水泥掺量的增大,无侧限抗压强度和抗剪强度值出现波动现象。随龄期的增加,2种水泥土抗压强度都在增长,且规律比较接近。研究还表明,掺加水泥后,2种土渗透性能改善比较显著。

Study on physical mechanical characters of cement stabilized mud and filling loess

In the entire research process,the effect of water-cement ratio,mix amount of cement and curing age on the physical and mechanical properties of mud and filling loess stabilized by cement is studied by means of the experimental device and method of cement mortar.The results show that the density of stabilized mud changes only a little and that of stabilized filling loess decreases with the rise of water-cement ratio and cement content,the unconfined compressive strength and share strength of stabilized mud all rise remarkably with the increase of cement content,and however those of stabilized filling loess fluctuate with the increase of cement content.Meanwhile,the compressive strengths of these two kinds of cement soil all increase and have the similar developing process with the rise of curing age.Moreover,the research shows that these two kinds of cement soil all have considerable improvement in permeability with the mixing of cement.