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从半刚性基层沥青混凝土路面和级配碎石柔性基层路面的优缺点入手,在级配碎石中添加少量的粉煤灰,考察了不同级配类型的粉煤灰稳定碎石混合料性能,分别采用压实性能、强度和塑性变形、渗透性能进行了评价。研究表明,采用间断级配,根据填充系数决定粉煤灰用量,不但能提高纯级配碎石的模量、施工和易性、减小塑性变形,同时还使基层具有良好的排水性能,从而减少路面的反射裂缝。
Starting from the advantages and disadvantages of semi-rigid base asphalt concrete pavement and graded gravel flexible base pavement, a small amount of fly ash was added into the graded macadam to investigate the properties of fly ash stabilized macadam mixture with different grading types, The compaction performance, strength, plastic deformation and permeability were evaluated respectively. The results show that the use of intermittent grading, according to the filling factor to determine the amount of fly ash, not only can improve the pure graded aggregate modulus, construction workability, reduce plastic deformation, but also make the grassroots have good drainage performance, and thus Reduce the reflective cracks on the road.