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从半刚性基层沥青混路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白灰,考察了不同级配类型的白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,在预留15%的孔隙率的基础上,在填充系数为0.9时,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,减少干缩与温缩裂缝,从而减少路面的反射裂缝。
Starting from the advantages and disadvantages of the semi-rigid base asphalt concrete pavement and the graded gravel flexible base pavement, a small amount of white ash was added into the graded macadam to investigate the properties of the lime-lime stabilized macadam mixtures of different grading types. Compaction performance, strength and plastic deformation, permeability were evaluated. The research shows that with the intermittent gradation, on the basis of reserving 15% of the porosity, the filling coefficient of 0.9 can not only improve the modulus, construction workability and plastic deformation of the pure graded crushed stone, at the same time Also grass-roots drainage has good performance, reduce shrinkage and shrinkage cracks, thereby reducing the road reflection cracks.