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Application and Evaluation of Asphalt Mixture by Central Plant Hot Recycling in Pavement Structure with LSPM
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    Abstract:

    Firstly, the reclaimed asphalt pavement was detected, and further mixing proportion of asphalt mixture AC-20/AC-25 by central plant hot recycling was designed. Secondly, the compressive strength and the compressive resilience modulus of the mixture with different RAP percentages were tested with pressure machine and MTS-810 respectively at 15 and 20℃. Next, the change laws were analyzed and the value ranges were recommended. Finally, structural analysis and evaluation were carried out for overlaid asphalt pavement and perpetual pavement by central plant hot recycling with LSPM so as to demonstrate the technical feasibility of the mixture used as structural layer of surface course in pavement structure with LSPM. The studies have suggested that, for overlaid asphalt pavement by central plant hot recycling with LSPM, the compressive resilience modulus of the recycled mixture needs testing in design and the tensile stress at the bottom of recycled structural layer needs checking according to specifications. Moreover, the application of recycled mixture in perpetual pavement with LSPM can satisfy the design control indexes.

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