沥青稳定碎石基层设计方法研究  

Reseach on design method of asphalt-treated base

作　　者：赵新坡[1] 李宁利[2,3] 戴经梁[4] 

机构地区：[1]天津高速公路集团有限公司,天津300384 [2]河北工业大学土木工程学院,天津300401 [3]河北省土木工程技术研究中心,天津300401 [4]长安大学 特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《河北工业大学学报》2012年第2期83-87,共5页Journal of Hebei University of Technology

基　　金：江西省交通厅重点科技项目(200424)

摘　　要：对沥青稳定碎石基层所处的自然条件和行车条件及其性能要求进行了分析,并与沥青混凝土面层进行了对比.对于沥青稳定碎石来说,设计中考虑的主要因素是抵抗永久变形和抗疲劳能力,由于沥青稳定碎石基层的集料的最大尺寸和厚度均大于面层沥青混凝土,传统的马歇尔设计方法并不适合于设计沥青稳定碎石基层混合料.本文以能提高抗车辙和耐久性的贝雷法来设计矿料级配,以混合料的最大内粘聚力为主要指标来确定沥青稳定碎石混合料的最佳沥青用量.结果表明,用此方法设计的沥青稳定碎石混合料具有极大的抗永久变形和抗疲劳能力.This paper analyzes the performance requirements of asphalt-treated base and compares the environmental condition and vehicle condition of asphalt-treated base with those ofwearing surface＇s asphalt material. For asphalt-treated base, the main factors considered in design are abilities of resistance to permanent deformation and resistance to fatigue on the bottom of the base. Because the maximal size of aggregate and the thickness of asphalt-treated base are all greater than those of surface＇s asphalt mixture, traditional Marshall design method is not suitable for designing mixture of asphalt treated base. The paper uses Bailey method for designing graduation, recommends a maximal cohesion index for designing mixture of asphalt-treated base, the results show that mixture using this design method has best resistance to permanent deformation and resistance to fatigue on the bottom of base.

关 键 词：沥青稳定碎石 贝雷法 最大内粘聚力 抗永久变形 抗疲劳性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]