Zhang Haihu, Guo Runhua
College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830047, China.
Department of Civil Engineering, Tsinghua University, Beijing 100084, China.
Materials (Basel). 2022 Sep 1;15(17):6026. doi: 10.3390/ma15176026.
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.
基于实验室测试，本研究的目的是评估含储盐材料的自融冰沥青路面的长期道路性能，并预测其除冰寿命。采用干湿循环和冻融循环在不同时长下对试件进行处理。通过冻融劈裂试验、高温车辙试验和低温小梁弯曲试验评估自融冰沥青混合料的长期道路性能。此外，通过电导率试验量化空隙率、温度、车辆荷载、裂缝和Mafilon（MFL）含量对盐分析出的影响，通过总溶解固体（TDS）试验量化冰雪融化的单次消耗量。结果表明，随着干湿循环和冻融循环次数的增加，自融冰沥青路面的长期水稳定性、长期高温稳定性和长期低温抗裂性均呈下降趋势。冻融循环对道路性能劣化的影响比干湿循环更深，尤其是对水稳定性的影响。随着空隙率和温度的增加，盐分析出分别加速1.1倍和1.5~1.8倍。在车辆荷载和裂缝作用下，盐分析出分别加速1.5倍和1.65倍。随着MFL含量的降低，盐分析出减缓0.54倍。最后，基于各因素在路面全寿命周期中的占比，建立了考虑上述因素的除冰寿命预测模型。
