Anti-rutting performance of the damping asphalt mixtures (DAMs) made with a high content of asphalt rubber (AR)

Damping asphalt mixtures (DAMs) have been developed to resist vibration and noise caused by traffic loads, and the ultimate design goal in this process is to increase damping. However, while optimizing its damping characteristics, its ability to resist rutting may face challenges. In the present study, two DAMs are designed based on the open-graded (OG) aggregate structure, and the mechanical properties and resistance to rutting are evaluated. Considering that DAMs are often laid as an intermediate part of the asphalt concrete (AC) layer, a new sample-preparing method based on Superpave Gyration Compactor (SGC) is proposed, and Hamburg wheel tracking (HWT) experimental tests are performed on the prepared samples. Digital image processing (DIP) is used before and after the HWT tests to analyze the mechanism of DAMs in rutting resistance. Results show that DAMs meet the requirements of conventional mechanical properties and have high damping characteristics. Working as an interlayer in the HWT sample, DAMs have better rutting resistance than traditional mixtures due to its denser characteristics, sufficient mechanical strength, and lower water sensitivity.

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  • English

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  • Accession Number: 01762617
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 17 2020 3:19PM