Experimental Study on the Road Performance of Lime Modified Clay
Due to the inability of high liquid limit clay to be directly used as road subgrade filler,improvement treatment is necessary.In order to achieve better improvement results and reduce project costs,the high liquid limit clay of Wuhan Fuqiang Avenue project was taken as the research object.The improvement effects of clay under different ash content ratios of 0%,2%,4%,6%,8%and 10%were analyzed,and the optimal ash content range was ultimately determined.By analyzing the experimental data,the engineering characteristics of modified clay with varying ash content are obtained,and the optimal ash content improvement plan is ultimately determined.When the ash content is8%,the unconfined compressive strength reaches its maximum and the expansion reaches its minimum value of 0.58%;When the ash content exceeds,the changes in liquid limit,plasticity index,and plastic limit are relatively small;When the ash mixing rate is between 0%and 8%,the maximum dry density and optimal moisture content curves of clay vary significantly;When the ash mixing rate is between8%and10%,the variation amplitude of the maximum dry density and optimal moisture content curve of clay slows down.The results show that adding lime to high liquid limit clay can significantly improve its road performance,and the 8%lime content has the best improvement effect,which can meet the technical requirements of the road engineering for roadbed fillers.
万方数据
维普
