加铺型就地热再生层间热结合性能试验分析  

Experimental analysis of thermal bonding performance between repaving layer and hot in-place recycled surface

作　　者：苏卫国[1] 伍勇辉 吴启槟 SU Wei-guo;WU Yong-hui;WU Qi-bin(School of Civil Engineering & Transportation, South China University of Technology, Guangzhou 510640, China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《广西大学学报（自然科学版）》2021年第4期875-886,共12页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51578248)。

摘　　要：为了保证沥青路面层间具有良好的粘结力,提高路面的整体性和耐久性,对加铺型热再生热结合与传统加铺的层间结合性能差异进行实验分析。选用AC-13与SMA-10进行不同的层间组合,采用剪切及拉拔试验,分析不同的层间结合形式下的强度性能。试验结果表明:层间嵌入深度随着结合温度的升高逐渐增大;在剪切和拉拔性能方面,层间热结合要显著强于传统薄层加铺;持续的增加层间嵌入深度,这在一定程度上就会增加层间剪切强度;热结合温度为140℃及以上时,层间剪切强度不再随嵌入深度增加而增加,主要表现为混合料的强度。层间结合效果随实验环境温度升高出现衰减。25℃条件下,与乳化沥青撒布时进行对比,热结合具有相对更大的剪切强度最大值,整体来看有69.5%的提升,拉拔强度经过测定后可以发现有44.4%的提升。60℃条件下,热结合的剪切强度最大值则有102.7%的提升,拉拔强度经过测定后可以发现有33.3%的提升。In order to ensure good adhesion between asphalt pavement layers and improve the integrity and durability of the pavement,an experimental analysis of the difference in bonding performance between the overlay thermal regeneration thermal bonding overlay and the traditional overlay is performed in this paper.AC-13 and SMA-10 are used in different interlayer combinations,and shear and pull tests are used to analyze the strength properties under different interlayer bonding forms.The experimental results show that the interlayer embedding depth gradually increases with the increase of the bonding temperature.The interlayer thermal bonding has a certain improvement in shear and drawing performance compared to the traditional thin layer overlay.With the increase of the interlayer embedding depth,the interlayer shear strength gradually increases.When the thermal bonding temperature is at 140℃and above,the interlaminar shear strength will no longer increase with the increase of the embedding depth,which is mainly manifested in the strength of the mixture.The interlayer bonding effect decreases with increasing temperature.In the 25℃experimental environment,the peak shear strength of thermal bonding is increased by 69.5%and the tensile strength is increased by 44.4%compared with the emulsified asphalt.In the 60℃experimental environment,the peak shear strength of thermal bonding was increased by 102.7%,and the tensile strength was increased by 33.3%compared with the emulsified asphalt.

关 键 词：就地热再生 热结合 HMA加铺 剪切实验 拉拔实验 

分 类 号：U414[交通运输工程—道路与铁道工程]