Study on recycled asphalt concrete for use in surface course in airport pavement |
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Authors: | Kai Su Yoshitaka Hachiya Ryota Maekawa |
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Institution: | aAirport Researcher Center, Port and Airport Researcher Institute, 3-1-1, Nagase, Yokosuka 239-0826, Japan;bService Center of Port Engineering, 3-3-1, Kasumigaseki, Chiyoda-ku, Tokyo 100-0013, Japan |
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Abstract: | This research investigated the possibility of using recycled asphalt concrete as surface course in airport pavement. The basic properties of recycled asphalt binder after short- and long-term aging were firstly tested and compared with those of the virgin asphalt. Then, a series of laboratory tests were performed to evaluate the performance of recycled asphalt concrete (containing 40% and 70% RAP), in which the HMA mixture without RAP was used as a control. Furthermore, an experimental pavement consisting of three sections (corresponding to 0%, 40% and 70% RAP content) was constructed to verify the laboratory test results. These results indicated that the recycled asphalt could achieve the similar properties against long-term aging as virgin asphalt. Recycled asphalt concrete containing 40% RAP could be used as surface course in airport pavement as it exhibited similar performance as control mixture both from the laboratory and experimental pavement test results. On the contrary, recycled asphalt concrete containing 70% RAP was not recommended as its fatigue property was much poorer compared with that of virgin asphalt mixture. |
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Keywords: | Airport pavements Surface course Recycled asphalt concrete Laboratory tests Experimental pavement |
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