Influence of Cracked Size of Old Concrete Pavement on Asphalt Overlay Stress

Abstract:

For the old concrete pavement with large proportion damage, it can be reconstructed by paving asphalt surface after cracked and stabilized with punching technique. But there is great difference in adopting the cracked size of pavement slab in every place and there is no relational theory basis. So the authors use 3-D finite element method to analyze the relationships of cracked size of concrete slab and load stress, thermal stress, coupling stress in asphalt overlay and pressure stress on the base surface. The results show that the influence of cracked size on thermal stress and coupling stress is much greater than load stress. With the decrease of cracked size, the thermal stress and coupling stress in asphalt overlay decrease rapidly, the stress centralization at joints and cracks lessens evidently, while the pressure stress on base surface increases. Considering the factors synthetically, it is reasonable for the cracked size from 80cm to 100cm.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 2405-2411
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.2405
• Online since: January 2012
• Authors: Yong Hong Wang, Xiong Jun He, Hong Sheng Qiu, Xi Ming Tan
• Keywords: Asphalt Overlay, Coupling Stress, Cracked Size, Load Stress, Old Cement Concrete Pavement, Thermal Stress

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