摘要
目的研发一种新型高性能沥青路面坑槽修复材料,探究坑槽修补面积、修补厚度对修补后路面结构的影响.方法通过挥发速率试验确定稀释剂.通过马歇尔稳定度试验确定添加剂.并对混合料进行马歇尔稳定度试验、高温稳定性试验、水稳定性试验等路用性能试验.利用ABAQUS建立沥青路面坑槽修补有限元模型,分析不同修补面积、不同修补厚度对路面结构修补的影响.结果稀释剂B与添加剂c为最优组合.当稀释剂B掺量为20%,添加剂c掺量为10%时,其初始强度达到4.03 kN,成型强度达到6.93 kN,施工和易性好,水稳定性试验中马歇尔残留稳定度大于75%,冻融劈裂强度比大于70%,车辙试验中动稳定度1487次/mm.剪应力的最大值出现于坑槽底部,拉应力的最大值出现于轮隙中心,压应力的最大值出现于坑槽表面.随着修补面积和修补厚度的增加,最大压应力和拉应力随之增加,最大剪应力随之减小.结论研发的沥青路面坑槽修复材料性能良好,满足《公路沥青路面施工技术规范》(JTG F40—2004)与工程使用要求.在坑槽修补的底部、表面应力最大值处,应保证混合料的密实性与原有路面的黏结性.以确保不产生二次破坏.
A new type of high-performance asphalt pavement repair material was developed.The influence of pit repair area and repair thickness on the repaired pavement structure was explored.The diluent was determined by volatilization rate test and the additive was determined by Marshall stability test.The Marshall stability test,high temperature stability test,water stability test and other road performance tests are carried out on the mixture.The finite element model of asphalt pavement pit repair is established by ABAQUS,and the effect of different repair areas and different repair thicknesses on the repair of pavement structures is analyzed.Results show that diluent B and additive c are the optimal combination.When the amount of diluent B is 20%and the amount of additive c is 10%,its initial strength reaches 4.03 kN and the molding strength reaches 6.93 kN.The workable performance are good.The Marshall residual stability is greater than 75%,freeze-thaw split strength ratio is greater than 70%,dynamic stability in rutting test is 1487 times/mm.The maximum value of shear stress appears at the bottom of the pit,the maximum value of tensile stress at the center of the wheel gap,and the maximum value of compressive stress on the surface of the pit.With the increase of repair area and repair thickness,the maximum compressive and tensile stresses increase,and the maximum shear stress decreases.Asphalt pavement repair material has good performance,and the performance of the repair material meets the requirements of“Technical Specifications For Construction Of Highway Asphalt Pavement”(JTG F40—2004)and engineering requirements.At the bottom and the maximum surface stress of the pit repair,the compactness of the mixture and the adhesion of the original pavement should be guaranteed to avoid secondary damage.
作者
杨彦海
闫羲钛
安中华
杨野
YANG Yanhai;YAN Xitai;AN Zhonghua;YANG Ye(School of Transportation Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Trade Union,Beijing Electronic Science and Technology Institute,Beijing,China,100070;College of Transportation Engineering,Dalian Maritime University,Dalian,China,116026)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第2期314-322,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51478276)。
关键词
道路工程
沥青路面
修复材料
路用性能
结构力学响应
road engineering
asphalt pavement
repair material
road performance
structural mechanics response
