不同化学固化粉土的CBR性能对比试验研究
Comparative Experimental Study on CBR Performance of Different Chemically Modified Soil

为了对比水泥和新型沥青粉末型固化剂下对粉土的固化效果，采用CBR试验对其承载力进行验证，得到以下结论：水泥和沥青粉固化剂都对粉土的最大干密度有显著提升，对粉土的最佳含水率有降低作用；水泥和沥青粉固化剂都对粉土膨胀量有抑制作用；在95%~100%压实度下，粉土的CBR值在10.63%~19.65%，而水泥固化土的CBR值的范围在80.88%~130.1%，沥青粉固化土的CBR值的范围在159.15%~243.9%。沥青粉固化剂在提高粉土击实性能、增加粉土抗变形能力、提高CBR值的效果上优于水泥，是一种性能良好的土壤固化材料。
In order to compare the curing effect of cement and the new asphalt powder stabilizer on the soil, the CBR test was used to verify its bearing capacity, and the following conclusions were obtained: Both cement and asphalt powder stabilizer can significantly improve the maximum dry density of soil, and reduce the optimal moisture content of soil; both cement and asphalt powder stabilizer can inhibit the expansion of soil; Under 95%~100% compaction degree, the CBR value of soil is 10.63%~19.65%, while the CBR value of cement-solidified soil is in the range of 80.88%~130.1%, and the CBR value of asphalt powder-solidified soil is in the range of 159.15%~243.9%. Asphalt powder stabilizer is better than cement in improving compaction performance, deformation re-sistance and CBR value of silt. It is a kind of soil curing material with good performance.