Adaptability of Asphalt Pavement to Eastern Xinjiang under Heavy Duties

Xueying Zhao, Aiqin Shen, Baofu Ma

Abstract


It is a consensus that extreme significant temperature difference and heavy traffic loads were detrimental to asphalt pavement structures. In this paper, to further investigate the mechanic response of asphalt pavement under such adverse conditions in Hami Prefecture and analyze the adaptability of different structures, 4 representative pavement structures were selected and simulated through the finite element method (FEM). It is shown that the disadvantage of heavy duty was possibly inevitable and flexible base structure was inappropriate in this condition. It was also found that semi-rigid course had obvious advantages under heavy duties but increasing the thickness of semirigid course blindly could not help with deformation resistance consistently, in spite of its major role in load-bearing. Compound base course structure was the most recommendatory in this case. Besides, it also suggested that effects of asphalt surface on the resistance to cracks were more effective than that of flexible upper base course, and hence it illustrated that increasing the thickness of asphalt course properly could help with the respite of deformation and crack distresses.

Keywords


asphalt pavement, significant temperature difference, heavy duty, FEM, mechanic response


DOI
10.12783/dtmse/ictim2017/9877

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