水泥改良黄土无侧限抗压强度试验研究

Experimental Study on Unconfined Compressive Strength of Cement-modified Loess

以阎良高速公路沿线黄土为研究对象,通过无侧限抗压强度试验研究了水泥剂量、压实度、含水率及养护龄期对水泥改良黄土无侧限抗压强度的影响。研究发现,水泥剂量、压实度与水泥改良黄土抗压强度呈现良好的线性增长关系,说明提高水泥剂量或压实度可提高水泥改良黄土抗压强度;水泥改良黄土抗压强度与含水率可构建二次函数关系,抗压强度随含水率增加而逐渐减小;相同水泥剂量下,水泥改良黄土抗压强度随龄期增长逐渐增大,且增长幅度逐渐变缓,两者建立的幂函数方程相关性显著。

In this paper,the loess along the Yanliang Expressway was used as the research object.The effects of cement dosage,compaction degree,water content and curing age on the unconfined compressive strength of cement-modified loess were studied by unconfined compressive strength test.The study found that the cement dosage and compaction degree showed a good linear growth relationship with the compressive strength of cement-modified loess,indicating that increasing the cement dosage or compaction degree can improve the compressive strength of cement-modified loess;the compressive strength and moisture content of cement-modified loess can construct a good quadratic function relationship,and the strength decreased with the increase of water content.Under the same cement dosage,the cement-modified loess gradually increased when age and the growth rate gradually became slower,which was related to the power function equation established by the two Significant.