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为了提出云南红粘土合理的改良措施,进行了机制砂及生石灰改良红粘土的试验研究,对掺入不同含量机制砂改良的红粘土进行了CBR试验及收缩试验,对掺入不同含量生石灰的红粘土进行了CBR试验,对掺入4%的生石灰的红粘土进行了干湿循环条件下的CBR试验。试验结果表明:机制砂对红粘土的强度及变形略有改善,但改良作用并不显著;生石灰对红粘土CBR值提高巨大,并且随着干湿循环次数增加,CBR值呈现不降反升的趋势,5个干湿循环周期后CBR上升幅度高达78%,对红粘土的长期性能稳定改善效果显著。
In order to propose the reasonable improvement measures of Yunnan red clay, the experimental research on the modified clay with lime and lime was carried out. CBR tests and shrinkage tests were conducted on red clay modified with different contents of sand. The CBR test was carried out on the clay and the CBR test on the red clay mixed with 4% quick lime was carried out under dry and wet conditions. The results show that the mechanical sand has a slight improvement on the strength and deformation of red clay, but the improvement is not significant. The CBR value of quick lime increases greatly for red clay, and the CBR value increases or decreases as the number of wet and dry cycles increases Trend, up to 78% increase in CBR after 5 wet-dry cycles, showing a significant improvement in long-term performance of red clay.