二灰土用作路面底基层材料的应用研究

Application of Lime-Ash Soil as Pavement Sub-base Material

对二灰土用作道路底基层材料的工程特性进行了研究,并提出了工程应用中的最佳配合比。室内试验表明:二灰土的压缩性能、抗渗性能、抗剪强度良好,均随龄期的增加而增加。综合考虑二灰土的工程特性与经济效益,建议工程应用中二灰土的配合比取石灰∶粉煤灰∶土=1∶3∶6。工程实例表明:路面底基层选用二灰土材料后具有较好的强度与稳定性,满足工程设计要求,应用效果良好。

This paper studies the engineering characteristics of lime-ash soil as the pavement sub-base material, and proposes the optimal mix ratio in engineering application. The indoor test results show that the compressive properties, impervious performance, and shear resistance of the lime-ash soil are good and they increase with the increased age. Comprehensively considering the engineering characteristics and economic benefits, the mix ratio of the lime-ash soil in engineering application is suggested to be lime∶fly ash∶soil =1∶3∶6. The engineering projects indicate that using the lime-ash soil material for pavement sub-base has good strength and stability, meeting the engineering design requirements, and the application effect is good.