High- and low-temperature fracture behavior of pervious asphalt mixtures under different freeze–thaw cycles based on acoustic emission technique

Freeze–thaw (F-T) cycles are one of the prime reasons for the performance degradation of pervious asphalt roads in seasonally frozen regions. With the aim of studying the high- and low-temperature performance of permeable asphalt mixture under F-T cycles, in this study, low-temperature splitting test and high-temperature dynamic creep test were carried out on steel slag, basalt, and recycled aggregate pervious asphalt concrete (PAC) under a sufficiently wide range of F-T cycles. Acoustic emission technology was used to map the influence of the number of F-T cycles on the low-temperature cracking resistance and high-temperature rutting resistance of the three PACs. Furthermore, the performance of recycled material aggregate as an alternative to pervious asphalt mixture coarse aggregate is assessed. The results show that by the twentieth F-T cycle, the tensile modulus of the three types of PAC decrease by 80–90%, and the rate of transitioning of the materials from primary creep to steady-state creep is increased by about 90%. Moreover, by comparing the performance of the three mixtures under low-temperature as well as high-temperature regimes, it is concluded that steel slag can serve as a viable basalt replacement in PAC preparation.