聚苯乙烯颗粒对轻质混合土的影响

Effect of expanded polystyrene grains on light-weight mixed soil

在室内试验的基础上,对轻质混合土密度、抗压强度、压缩变形特性等进行了分析,结果表明:EPS颗粒含量变化对降低轻质混合土的密度作用效果显著;EPS颗粒含量对混合土抗压强度的影响很小,抗压强度主要取决于水泥的含量;在压缩变形特性方面,荷载小于混合土压缩屈服应力时EPS颗粒含量对混合土的压缩变形量影响较小。由此认为EPS颗粒在降低混合土密度方面具有一定的优越性,但对混合土的抗压强度、压缩变形量影响不明显,所以将混有EPS颗粒的轻质混合土作为填土材料具有很好的应用前景。

The analysis of the density, compressive strength, and compressive deformation characteristics of light-weight mixed soil based on laboratory experiments shows that the variation of EPS grain content is of obvious effects on the decrease of the density of light-weight mixed soil, but it is of little influence on the compressive strength, which depends mainly on the content of cement. It is also concluded that, when the loads on mixed soil are less than the yield stress of the soil, the influence of EPS content on the deformation behavior of soil can be ignored. Therefore, the light-weight soil mixed with EPS grains, used as the filling material, is of wide scope of application.