石灰矿渣稳定黄土的劈裂拉伸强度试验研究

Experimental Research on Splitting Tensile Strength of Slag-Lime Stabilized Loess

以石灰矿渣稳定的黄土为对象,通过击实试验和劈裂拉伸强度试验,研究了养护龄期和石灰矿渣掺量对稳定黄土含水率、干密度和劈裂拉伸强度的影响。结果表明:随着石灰矿渣掺量的增加稳定黄土的最大干密度减小、最优含水率增大;当石灰矿渣掺量一定,随矿渣掺量的增加最优含水率减小、最大干密度增大;劈裂拉伸强度随石灰矿渣掺量的增加而增大、随养护龄期的延长而增长;通过对劈裂拉伸强度数据的拟合,建立了劈裂拉伸强度与石灰/矿渣的比值、孔隙率、石灰矿渣体积掺量的关系。

With the loess stabilized by slag and lime as a research object, this paper studies the effects of curing age, lime content and slag content on the moisture content, dry density and splitting tensile strength of the stabilized loess by compaction test and splitting tensile strength test. The results show that the optimal moisture content decreases and the maximum dry density increases with the increase of slag. For a given lime content, the optimal moisture content decreases and the maximum dry density increases with slag content increasing. The splitting tensile strength improves as the content of slag increases, and increases with curing age. The relationship between porosity, ratio of lime to slag(L/S), and inorganic binder content and porosity are established by using the fitting regression of experimental data.