摘要
开普封层是由碎石封层和稀浆封层或微表处层构成的一种复合封层技术,具有抗反射开裂性、抗滑性、防水性和平整度均较好等优点。然而,开普封层使用效果受施工质量影响显著,层间黏结不良易造成推移、表层脱皮、剥落等病害。该技术在国道改建项目中的应用还不多见。依托陇东地区国道改建项目,以多层式开普封层结构代替沥青路面下面层,对橡胶沥青碎石封层+橡胶沥青碎石封层+改性乳化沥青微表处的3层式开普结构材料组成设计、施工工艺及层间黏结保障措施开展研究,结果可供同类地区开普封层技术应用参考。
Cape seal is a composite sealing technique constituted by chip seal and slurry seal or micro surfacing,which holds plenty of advantages such as good anti-reflective cracking property,enough surface texture,high waterproofness and evenness.However,the effect of Cape seal is predominantly controlled by the construction quality.Poor adhesion between layers could lead to several common distresses as shoving,stripping as well as peeling.So far,this technique has been barely used in rehabilitation of national trunk highways in China.Relying on a reconstruction project of a national highway in east Gansu Province,the multi-layer asphalt rubber Cape seal structure is used to replace the lower surface layer of asphalt pavement.Based on a typical test section,the material design and construction of asphalt rubber Cape seal and possible measures to strengthen the bond between different layers are studied.The results can provide reference for application of Cape seal structure in similar regions.
作者
朱家剑
刘科
杨海涛
韩丽丽
ZHU Jia-jian;LIU Ke;YANG Hai-tao;HAN Li-li(Gansu Road and Bridge Construction Group Co.Ltd.,Lanzhou730070,China;Chang’an University,Xi’an710064,China;Highway and Railway Engineering,Shaanxi College of Communication Technology,Xi’an710018,China)
出处
《公路》
北大核心
2019年第10期14-18,共5页
Highway
基金
陕西省高校第二批“青年杰出人才支持计划”资助项目，项目编号YJ18008
关键词
道路工程
橡胶沥青
开普封层
改建道路
沥青路面
road engineering
asphalt rubber
Cape seal
reconstruction of highway
asphalt pavement
