水泥路面沥青薄层罩面层间抗剪强度及影响  

Shear Strength and Influence of Thin Asphalt Overlays on Cement Pavement

作　　者：徐鸥明[1] 徐仁涛 李洋 韩森[1] XU Ouming;XU Rentao;LI Yang;HAN Sen(Key Laboratory of Highway Engineering in Special Region of Education Ministry,Chang′an University,Xi′an 710064,China;School of Materials Science and Engineering,Chang′an University,Xi′an 710061,China)

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]长安大学材料科学与工程学院,陕西西安710061

出　　处：《郑州大学学报（工学版）》2023年第5期121-126,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51578076);陕西省交通厅科技资助项目(19-29K)。

摘　　要：针对旧水泥混凝土路面沥青薄层罩面易发生推移等破坏问题,选取3种黏层油(普通乳化沥青、SBS改性乳化沥青、自制高性能乳化沥青)、3种罩面层沥青混合料(AC-10、SMA-10、DTFC-10)以及3种混凝土板表面粗糙状况(原状、凿毛、刻槽),通过直接剪切试验对黏层油类型及用量、罩面层沥青混合料类型、水泥路面表面构造等因素对层间抗剪强度的影响进行了研究,并运用灰色理论分析了不同因素的影响程度。结果表明:黏层油种类对层间抗剪强度有显著影响,层间抗剪强度随黏层油用量增加呈先增大后减小趋势,且黏层油用量为0.8 L/m 2时,层间抗剪强度达最大值;罩面层沥青混合料类型对层间抗剪强度也有影响,加铺超薄磨耗层DTFC-10罩面后层间抗剪强度明显高于其他2种混合料;水泥混凝土板表面粗糙状况对层间抗剪强度也有影响,凿毛表面略高于刻槽,但明显高于原状表面。灰关联分析表明:影响层间抗剪强度的关键因素是罩面层混合料类型和黏层油,水泥混凝土板表面粗糙状况和黏层油用量也对其有一定影响。In view of shear failure of thin asphalt overlays on old cement concrete pavement,three types of tack coat oil(ordinary emulsified asphalt,SBS modified emulsified asphalt and self-made high-performance emulsified asphalt),three types of overlay mixtures(AC-10,SMA-10 and DTFC-10)and three kinds of underlying surface roughness(initial texturing,chiseling,and grooving)were selected to prepared compound pavement.The effects of various factors,such as the type and dosage of the tack coat oil,the type of the overlay mixtures and the surface roughness of the existing cement pavement,on the interlayer shear strength were evaluated by the direct shear test.In addition,the influence degrees of various factors were analyzed though gray theory.The results showed that the type of tack coat oil had a significant effect on the interlayer shear strength.Furthermore,the interlayer shear strength first increased and then decreased with the increase of the tack coat oil consumption.And the shear strength reached the maximum value when the amount of the tack coat oil was 0.8 L/m 2.The effects of the overlay asphalt mixtures type on the interlayer shear strength were significant ly different,and the values of ultra-thin wear course DTFC-10 were greater than other two mixtures.The surface textural behavior of concrete pavement also had positive contribution to the interlayer shear strength.The shear strength values of underlying surface treated by chiseling method were slightly higher than that treated by grooving method.While,the values of those two textured surface were obviously greater than the initial surface.Gray correlation analysis revealed that the interlayer shear strength were notable dependent on the thin HMA overlays and the tack coat oil.Moreover,the surface texture of cement concrete pavement and the consumption of tack coat oil also had a certain influence.

关 键 词：水泥路面 沥青罩面 抗剪强度 混合料类型 黏层油 表面构造 灰关联 

分 类 号：U416.2[交通运输工程—道路与铁道工程]