摘要
水泥混凝土路面加铺环氧沥青混凝土超薄罩面,可在相对较低建设成本下,充分发挥环氧沥青混凝土高性能的优势,解决路面行车舒适性、安全性及耐久性问题,同时可结合水泥混凝土路面长寿命结构特点,建造长寿命高性能路面结构。为评价该路面结构的层间黏结性能,采用环氧沥青、SBS改性沥青作为层间黏结材料,利用自行设计加工的斜剪、拉拔夹具,通过斜剪、拉拔试验,研究了洒布量、试验温度、加载速率、界面浸水及老化等因素对该路面结构层间黏结性能的影响。试验结果表明:(1)浸水损害条件对层间黏结性能的影响十分显著,浸水后环氧沥青剪切、拉拔强度分别下降47.4%,30.7%,而SBS改性沥青下降75.1%,30.3%;(2)SBS改性沥青作为层间黏结材料,老化后的层间黏结性能衰减较为突出,剪切、拉拔强度分别下降23.0%,60.5%;(3)针对该路面结构,环氧沥青黏结材料层间黏结性能显著优于SBS改性沥青。
The cement concrete pavement with ultra-thin epoxy asphalt concrete overlay can give full play to the high performance advantages of epoxy asphalt concrete to solve the problems of pavement driving comfort,safety and durability with relatively low construction cost.At the same time,it can combine the long-life structural characteristics of cement concrete pavement to build long-life high-performance pavement structure.In order to evaluate the interlayer bonding performance of the pavement structure,adopting epoxy asphalt and SBS modified asphalt as the interlayer bonding materials,The influences of spray amount,test temperature,loading rate,interface immersion and aging on the bond performance of the pavement structure are studied through the oblique shear and pull-out tests with the self-designed oblique shear and pull-out clamps.The test result shows that(1)the influence of immersion damage conditions on the interlayer adhesion is very significant,the shear strength and pull-out strength of the epoxy asphalt decreased by 47.4%and 30.7%,while those of SBS modified asphalt decreased by 75.1%and 30.3%respectively after immersion;(2)SBS modified asphalt is used as the interlayer bonding material,the attenuation of the interlayer bonding performance after aging is more prominent,and the shear and pull-out strengths are reduced by 23.0%and 60.5%respectively;(3)for this pavement structure,the interlayer bonding performance of epoxy asphalt bonding material is significantly better than that of SBS modified asphalt.
作者
牟压强
郭大进
孙武云
郭荣鑫
柏耘
MOU Ya-qiang;GUO Da-jin;SUN Wu-yun;GUO Rong-xin;BAI Yun(School of Architectural Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Yunnan Wuding-Tangdian-Xundian Expressway Construction Command,Kunming Yunnan 650100,China;Zhaotong Traffic Construction Engineering Quality and Safety Supervision Bureau,Zhaotong Yunnan 657000,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2021年第5期1-9,共9页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(11962009)
云南省交通科技项目(云交科教[2017]35号)
昆明理工大学分析测试基金(2019M20182210046)。
关键词
道路工程
黏结性能
斜剪试验
环氧沥青
复合式路面
超薄罩面
拉拔试验
road engineering
bonding properties
oblique shear test
epoxy asphalt
composite pavement
ultra-thin overlay
pull-out test
