Based on laboratory tests, the objective of this study is to assess long-term road performance and to predict deicing longevity of self-ice-melting asphalt pavements containing salt-storage materials. Dry–wet cycles and freeze–thaw cycles were used to treat the specimens at different durations. The long-term road performance of self-ice-melting asphalt mixtures was evaluated by freeze–thaw splitting tests, high-temperature rutting tests, and low-temperature beam bending tests. In addition, the influences of coefficients of void ratio, temperature, vehicle load, crack, and Mafilon (MFL) content on salt precipitation were quantified by conductivity tests, and single consumption of snow and ice melt was quantified by total dissolved solids (TDS) tests. The results show that the long-term water stability, long-term high-temperature stability, and long-term low-temperature crack resistance of self-ice-melting asphalt pavements tended to decrease as the number of dry–wet cycles and freeze–thaw cycles increased. Freeze–thaw cycles exerted deeper influences on the deterioration of road performance than dry–wet cycles, especially on water stability. With increased void ratio and temperature, salt precipitation was accelerated by 1.1 times and 1.5~1.8 times, respectively. Under vehicle loads and cracks, salt precipitation was accelerated by 1.5 times and 1.65 times, respectively. With decreased MFL content, salt precipitation slowed down by 0.54 times. Finally, based on the proportion of each factor relative to the whole life cycle of the pavement, a dicing longevity prediction model was established considering the above factors.

The purpose of this work is to determine the implications of internal salt freeze–thaw cycles (F–TCs) on performance deterioration to asphalt and asphalt mixtures containing Mafilon (MFL). The deterioration to different numbers of F–TCs and different MFL contents on asphalt properties and mechanism were investigated by physical properties tests and microcosmic tests. Then the damages of road performance indexes of asphalt mixtures containing different MFL contents were studied by road performance tests. The experimental results show that asphalt containing MFL after F–TCs has a remarkable decline in ductility and penetration, while growth in softening point. Internal salt F–TCs are most damaging to the cryogenic properties of asphalt. Chemical reactions and salt aging effects occur in salt F–TCs, raising the glass transition temperature of asphalt. Road performance tests indicate the deterioration of internal salt F–TCs to high temperature stability and water stability is the most pronounced, with 29.18% and 21.78% reduction, respectively.

To improve the resource utilization rate of municipal solid waste incineration bottom ash (MSWI-BA), this study prepared a controlled low-strength material using MSWI-BA as the sole fine aggregate. Combining microstructural characterization, the effect of MSWI-BA on cement hydration and the effect mechanism of mix design parameters on strength development were revealed. Furthermore, the leaching behavior of heavy metals under different pH conditions and liquid–solid ratios (L/S) was comprehensively evaluated. Results demonstrated that MSWI-BA participated in the hydration process, exhibiting non-inert characteristics. The pozzolanic activity of MSWI-BA was activated with ≥8% cement content, increasing hydration heat by 21.4%–43.4% and late strength by 16.8%–19.2%. Fly ash content and water–solid ratio affected microstructural densification by altering ettringite morphology and distribution, respectively. Heavy metal leaching was pH-dependent, with higher mobility under acidic conditions. Except for Ni and Cd affected by the dilution effect, leaching concentrations initially increased and then decreased with L/S.