水泥粉煤灰砂砾综合路用性能研究

针对二灰稳定、水泥稳定类材料在使用中存在的缺陷,在室内选取了4类级配和9个方案对水泥粉煤灰稳定砂砾的综合路用性能进行了测试研究,通过对比不同集料级配、不同水泥粉煤灰比例以及不同粉煤灰掺量与综合路用性能之间的关系,发现掺加适量粉煤灰,提高了混合料强度增长能力以及劈裂强度,提高了混合料抗裂性能.结合测试结果,推荐了水泥粉煤灰砂砾的集料级配及粉煤灰掺加比例.

A Study on Pavement Performances for Cement Lime and Fly-Ash

Aiming at the objection to lime and fly-ash stabilized gravel and lime stabilized gravel on pavement-performances, four gradations and nine mixture plans of cement and fly-ash gravel are studied and testsed. By comparison of relativities between pavement performances and different gradations of aggregate and different contents of cement and fly-ash, it is drawn that by adding the suitable quantity of fly-ash into the mixture, the compressive and split strength, and anti-cracking properties of the mixture can be enhanced. Last, graduation and fly ash dosage are proposed.