Damage behavior and mechanism of asphalt layer of rigid base asphalt pavement

被引：0

作者：

Li S. ^{[1
]}

Chen S. ^{[1
]}

Liu Z. ^{[1
]}

Li Y. ^{[1
]}

机构：

[1] State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science and Technology, Changsha

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2016年 / 47卷 / 03期

关键词：

Cracking mechanism; Fatigue damage; Rigid base asphalt pavement; Road engineering; Rutting deformation; Shear fatigue;

D O I：

10.11817/j.issn.1672-7207.2016.03.046

中图分类号：

学科分类号：

摘要：

Based on the structure characteristics and the deficiencies of the existing studies of rigid base asphalt pavement, the theories of damage mechanics and simulation method were used to analyze the damage behavior and mechanism of the rigid base asphalt pavement, and the entity engineerings were observed and analyzed. The results show that the rutting deformation of rigid base asphalt pavement increases with the increase of load times, but the increase amplitude decreases continuously, and the rutting deformation is smaller than that of other structure. The asphalt layer of which is below the surface about 1/5 thickness and the bottom surface at the joint are prone to shear fatigue damage. It is recommended that the thickness of asphalt layer should not be too thin and should take certain anti-crack measures at the joints. Longitudinal cracks of asphalt layer are mainly nearby the wheel track of traffic lane, some transverse cracks also extend only from the surface down about 2 cm, and these cracks are Top-Down cracks. There are small amounts of reflection cracks and Top-Down cracks in the asphalt layer overlay on continuously reinforced concrete slab, and the crack width at the embedment depth of steel should be controlled strictly. © 2016, Central South University of Technology. All right reserved.

引用

页码：1065 / 1070

页数：5

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