水泥与骨料掺量对生土基材料物理性能的影响

Influence of Cement and Aggregate Content on Physical Properties of Soil Base Material

以西部大开发新农村建设为背景,针对陕西绥德黄土,采用不同掺量P·O 42.5水泥与细骨料对陈化后的该生土进行改性,并对改性后材料的密度、线收缩率、弹性模量、泊松比等物理性能进行了全面的研究,通过对试验数据进行拟合,发现随水泥掺量的增加,材料的物理性能均呈线性变化,具有较高的相关系数。骨料的加入使材料的密度升高并显著降低材料的线收缩率,在不同水泥掺量条件下,材料的弹性模量与泊松比随骨料掺量的增加呈波动性变化。

Based on the background of the western development of new rural construction in Shaanxi,this paper modified the soil of Shanxi Suide with different amount of P·O 42.5 cement and fine aggregate and physical properties of the modified materials like density, shrinkage rate,elastic modulus,Poisson’s ratio were studied comprehensively. By fitting the experimental data,it is found that the physical properties of the material change linearly with the increase of cement content,and have a higher correlation coeffcient. The addition of aggregate increases the density of the material and reduces the linear shrinkage of the material. Under the condition of different cement content,the elastic modulus and Poisson’s ratio of the material fluctuate with the increase of the aggregate content.