新型ASC土壤固化剂在道路底基层的应用  

Application of New ASC Soil Stabilizer in the Sub-base of a Road

作　　者：唐明[1] 尹国英[1] 祝广军 邵宏伟 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]辽宁北四达交通技术发展有限公司,辽宁沈阳110003

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第1期105-108,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省科技厅项目资助(200231001)

摘　　要：目的在充分研究粉状土壤固化剂作用机理的基础上,复合配制一种新型土壤固化剂,测试评价其在道路底基层的应用性能.方法以水泥、高钙粉煤灰、石灰和专用激发剂为原材料,复合配制新型ASC土壤固化剂,测试其固化土的无侧限抗压强度和间接抗拉强度7、d弯沉值、浸水膨胀量及其抗冻性,与水泥稳定土进行比较.结果随着固化剂的掺量的增大,无侧限抗压强度和间接抗拉强度相应增大,试件的密实度显著影响其无侧限抗压强度和间接抗拉强度,随着试件养护龄期的不断增大,后期无侧限抗压强度和间接抗拉强度相应增大.与水泥稳定土相比,其抗冻性能明显改善.该固化剂固化土体系的7 d弯沉值小,水稳定性能良好,浸水膨胀量为0.021%,改善了道路的承载能力.结论以水泥、高钙粉煤灰、石灰和活性激发剂作为原料复合的新型ASC土壤固化剂有利于公路底基层抗压强度、抗冻融性、承载能力等性能的提高.A new powdery soil stabilizer is confected on the basis of overall research function mechanism of powdery soil stabilizer and using cement, high-calcium fly ash, white lime and special stimulator as compound material. The basic performance of the ASC stabilized soil applied in the base and the sub-base of a road was tested and evaluated. The results have shown that the new soil stabilizer can increase the performance of the sub-base of the road compared with the performance of cement stabilized soil. With the increasing of the content, the age and compaction degree of the test specimen, unconfined compression strength and indirect compression strength are increased. For the stabilization soil, the bend subside value of 7 d is small, the stability in water is good, and the expanding capacity in water is 0.021%. So if the soil stabilizer is applied in the base and the sub-base of a road, the compression strength of stabilization soil, the freeze-thaw resistance of stabilization soil and bearing capacity of a road are improved.

关 键 词：土壤固化剂 道路 作用机理 强度 承载能力 

分 类 号：TU528[建筑科学—建筑技术科学]