Abstract: Recycled aggregate asphalt concrete was a kind of ordinary asphalt concrete which replaced part or all of aggregate in concrete with recycled aggregate of construction waste. In this paper, the water stability of recycled aggregate asphalt concrete were studied by immersion Marshall test and freeze-thaw splitting test. The results showed that the highest stability of AC-16 and AC-20 immersion Marshall was 19.60 and 19.38 MPa respectively, and the highest strength ratio of freeze-thaw splitting was 0.87. Both of them can meet the requirements of the code. The influence of recycled aggregate of construction waste instead of original aggregate on water stability of asphalt concrete was found out through the analysis of experimental data.

Key words: recycled aggregate, asphalt concrete, water resistant properties