水性环氧-SBR改性乳化沥青粘结料界面力学性质分析  

Mechanical Property Analysis of Waterborne Epoxy-SBR Modified Emusified Asphalt Binder

作　　者：张倩[1,2] 张旭景 徐义恒 ZHANG Qian;ZHANG Xujing;XU Yiheng(School of Civil Engineering,Xi'an University of Arch.and Tech,Xi'an 710055,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]陕西省岩土与地下空间工程重点实验室,陕西西安710055

出　　处：《材料科学与工程学报》2021年第3期366-372,共7页Journal of Materials Science and Engineering

基　　金：内蒙古自治区交通运输科技资助项目(NJ-2014-23);陕西省高性能混凝土工程实验室2017年开放基金资助项目(SHPC201704);浙江省公路与运输管理中心科技计划资助项目(2019H01);陕西省交通运输厅交通科技资助项目(16-14k)。

摘　　要：界面粘结材料被用于沥青路面坑槽修补接缝处,为研究修补后的界面性能,针对坑槽修补粘结界面破损病害机理,以自行研发的水性环氧-SBR改性乳化沥青(SW)粘结料为主体,选用SBS、SBR改性乳化沥青粘结料作对比,从粘结料力学性质出发,进行不同撒布剂量、温度、冻融循环次数下的剪切和拉拔试验,分析粘结料的界面力学表现。研究结果表明:三种沥青基粘结料温度敏感性较高,力学性质与温度呈负相关关系,且在相同的温度和撒布剂量下,SW的剪切拉伸强度较大;随着粘结料撒布量的增加,剪切强度与拉拔强度均呈先增后减的趋势,最佳粘结料用量为0.6kg·m^(-2);冻融循环次数增加,粘结料性能指标出现不同程度降低,SW残留剪切强度最大。相比之下,SW粘结料在水温作用下力学性质表现更优越。Interface binder is widely used in the pothole repair of asphalt pavement.To examine performance of the repaired interface,a self-developed waterborne epoxy-SBR modified emulsified binder(SW)was applied to analyze the damage mechanism of the bonding interface,while SBS and SBR modified emulsified asphalt binders were selected for comparison.Shearing and pull-out tests under different spreading amount,temperature and frost-thaw cycles were carried out to investigate mechanical properties of the binders.Results show that the three pitch-based binders had high temperature sensitivity and their mechanical properties were negatively correlated with the temperature.SW had the greatest shearing strength under the same spreadng amount and at the same temperature.For the three binders»shear and pull-out strength all first increased and then decreased with the increase of spreading volume.The best mechanical combination between the cohesion and the friction resistance was formed at the bonding interface when the binder amount was 0.6 kg·m^(-2).Mechanical properties weakened with the increase of frost-thaw cycles,with the residual shearing strength of SW the maximum.In contrast»the mechanical properties of waterborne epoxy-SBR binder were superior under the action of water and temperature.

关 键 词：坑槽修补界面 粘结料 力学性质 剪切拉拔试验 

分 类 号：U414.3[交通运输工程—道路与铁道工程]