排水性沥青路面半刚性基层的防裂性能研究

排水性沥青路面半刚性基层的防裂性能研究ROADCONSTRUCTIONANDMACHINERY文章编号：1000—033X(2013)09—005503排水性沥青路面半刚性基层的防裂性能研究李建宁，刘崭，吴德军(1．宁夏公路建设管理局，宁夏银川750002；2．西安公路研究院，陕西西安710064)摘要：通过对比分析二灰碎石和水泥稳定碎石混合料的收缩试验，对二灰碎石的防裂性能进行优化研究。结果表明：二灰碎石是适合排水性沥青路面抗裂性能较好的半刚性基层结构形式；骨架密实结构的二灰碎石温缩系数和干缩系数较小；二灰含量小于14时，温缩系数和干缩系数增大缓慢。关键词：排水性沥青路面；二灰碎石；防裂性能；温缩系数中图分类号：U416．223文献标志码：BResearchonAnti_。crackingPerformanceofSemi_。rigidBaseofPorousAsphaltPavementLIJian—ning，LIUZhan，WUDe—jun。(1．NingxiaAdministrativeBureauforHighwayConstruction，Yinchuan750002，Ningxia，China；2．Xi’anHighwayInstitute，Xi’an710064，Shaanxi，China)Abstract：Thecomparisonoflime—flyashmacadamandcementstabilizedmacadamwasconductedwithshrinkagetestsinordertostudytheoptimizationofanti——crackingperformanceoflime——flyashmacadam．Theresultsshowthatthelime—flyashmacadamisatypeofstructurewithproperanti—crackingperformancewhichissuitableforporousasphaltpavement；lime—flyashmacadamwithskeletondensestructurehassmallertemperatureshrinkageandshrinkagecoefficients；whenthelime—flyashaccountsforles