Analysis of bonding strength characteristics between reinforcedbase and surface layer of asphalt pavement(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2022年2期
- Page:
- 22-31
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Analysis of bonding strength characteristics between reinforcedbase and surface layer of asphalt pavement
- Author(s):
- HE Hongzhi1; 2; MENG Huilin3; LIU Yiming1; 2; REN Dongya1; 2; AI Changfa1; 2
- 1. School of Civil Engineering， Southwest Jiaotong University， Chengdu 610031， Sichuan， China;2. Key Laboratory of Highway Engineering of Sichuan Province， Southwest Jiaotong University，Chengdu 610031， Sichuan， China； 3. Hebei Provincial Communications Planning,Design and Research Institute CO. LTD., Shijiazhuang 050090， Hebei， China
- Keywords:
- road engineering; semirigid asphalt pavement; interlayer bonding; strength characteristics; attenuation effect; interface morphology
- PACS:
- -
- DOI:
- -
- Abstract:
- To explore the change characteristics of reinforced interlayer bonding strength and the response characteristics that trigger the change, the semirigid asphalt pavement basesurface layer bonding of PC2 emulsified asphalt permeable layer and fiberreinforced rubber modified asphalt macadam sealing layer was taken as the object of study. The selfmade shearing and pullout devices were used to test the interlayer bonding strength under 10 combinations of prime coat and tack coat materials, the overall reinforced effect of the interlayer strength and its growth law at each stage were investigated. At the same time, based on temperature interval division and reverse modeling technology, the influence characteristics of temperature interval and mesoscopic interface morphology on the change of interlayer strength were analyzed. The results show that reinforced interlayer bonding significantly improves the interlayer shear and tensile strength, and the improvement effect on the tensile strength at room temperature and high temperature is more significant. Compared with the interlayer permeable oil, when the amount of rubber modified asphalt in the sealing layer changes, the contribution to the interlayer strength growth is greater, and both prime coat and tack coat materials have boundary points based on different amounts, thus forming a twostage feature of strength growth. In different temperature ranges, the changing trends of interlayer shear strength and tensile strength are different, and in the relatively high temperature range, the two kinds of strengths have a faster attenuation trend with increasing temperature. The area ratio is used as a characterization parameter of the interface morphology, there exists a limit value of 95% during the development of the interlayer shear strength. Once this limit value is exceeded, the interlayer shear strength no longer increases simultaneously with the K value. 6 tabs, 5 figs, 29 refs.
Last Update: 2022-04-13