粉煤灰作填料的沥青稳定碎石混合料试验研究

粉煤灰代替石灰石矿粉作填料拌制沥青稳定碎石混合料,采用大马歇尔试验方法进行室内试验。结果表明,掺粉煤灰的沥青稳定碎石混合料各项技术指标均能达到规范要求,且高温性能优于掺石灰石矿粉的沥青稳定碎石混合料,同时还具有良好的水稳定性。因此,可用粉煤灰代替石灰石矿粉作为沥青混合料的填料,这对提高沥青混合料的路用性能具有积极意义。

Fly ash instead of powdered limestone used as the padding mixs the mixture of asphalt treated base mixture,using the big Marshall method to test in the roomo the test result shows that all the technical specification of the asphalt treated base mixture which is mixed the fly ash can meet requirements for norms, and its high temperature performance surpasses the asphalt treated base mixture which is mixed the powdered limestone, and it also has good water stabi）ityo Therefore, it is certainly positive significance that fly ash instead of powdered limestone used as the padding to apply in asphalt mixture for improving pavement performance of the bituminous mixture .