橡胶颗粒除冰雪沥青混合料设计与施工工艺研究.pdfVIP

摘 要 摘 要 摘摘 要要 道路积雪、结冰是冬季道路交通事故的主要诱因，也是困扰道路交通部门的 难题，寻求科学有效的路面抑制冻结技术今年来得到越发广泛的关注。橡胶颗粒 沥青路面是将废旧轮胎破碎得到的橡胶颗粒加入矿料级配，提高沥青路面的整体 弹性，在行车荷载反复作用下抑制路面结冰。 本文通过分析冰层破坏机理、雪的融化机理研究橡胶颗粒沥青路面抑制冻结 和破冰机理；针对在沥青混合料中加入橡胶颗粒后强度降低的特点，为了保证沥 青混合料的结构整体性和密实性，确定混合料类型采用骨架密实结构，对传统的 体积设计法进行修正，提出了针对橡胶颗粒沥青混合料的体积设计法；针对橡胶 颗粒沥青路面这一特殊路面结构，通过室内试验研究，以马歇尔试件空隙率作为 主要控制指标，系统分析了现场施工及室内试验对原材料加热温度、投放工艺， 混合料拌和温度、时间，混合料运输、碾压、摊铺工艺的特殊要求；以绥芬河至 满洲里国道主干线阿荣旗至博克图段高速公路为依托工程，系统研究了橡胶颗粒 高弹沥青路面施工中的关键性问题，通过测定路面回弹弯沉及总弯沉，从而建立 ； 橡胶颗粒沥青路面最佳弹性域及橡胶颗粒最佳掺量的关系 采用破冰率作为主要 控制指标检测橡胶颗粒沥青路面的除冰效果，观测沥青路面在不同温度状态下的 破冰效果研究橡胶颗粒沥青路面的有效工作温度范围。 关键词：橡胶颗粒、抑制冻结、体积设计法、空隙率、破冰率 I Abstract Abstract AAbbssttrraacctt Road snow and ice is the main cause of road traffic accidents, as well as is a difficult problem for administrator in winter. To find scientific and efficient technology of anti-ice-snow in recent years has been more and more widespread concerned. Granulated crumb rubber act as aggregates in mixture, which are crashed from scrap tires. Granulated crumb rubber can improve elasticity of asphalt pavement whichcanbeanti-snow-icewiththeconductofrepeatedtrafficloads. By analyzing failure mechanism of ice and mechanism of snow melting, mechanism of anti-snow-ice and ice-breaking is researched in this paper.According to the characteristics that strength was reduced after adding granulated crumb rubber in asphalt mixture in order to ensure structural integrity and compactness of asphalt mixture, making skeleton dense structure as the type of asphalt mixture. The traditional volume design method was revised and volume design method of granulated crumb rubber was put