储盐类融雪抑冰材料对沥青混合料性能影响研究进展

为提高冰雪气候条件下沥青路面的运营安全水平，系统介绍了国内外储盐类融雪抑冰材料对沥青混合料性能研究的现状，总结分析了融雪抑冰的主要材料类型、作用机理、评价方法及应用效果等，并探讨了材料对沥青混合料融雪抑冰功能和路用性能的影响。分析表明：储盐类沥青混合料中融雪关键成分氯化物的析出降低了路表水溶液的冰点、路面与冰雪之间的黏附力，显著提高了自身融雪除冰功能；但导致混合料路用性能发生了一定的变化。MFL（Mafilon）材料的掺加，使混合料的各项路用性能均降低，尤其是水稳性能。V-260（Verglimit-260）材料以外掺的方式添加到混合料中，其水稳性能和低温性能均降低。而ICB（icebane）材料的粒径、置换方式、掺量及所用矿料级配等因素均对混合料路用性能有影响。采用高黏改性沥青或掺加添加剂，可有效改善融雪抑冰沥青混合料的路用性能。

Review of research on the effect of salt storage deicing material on the preformance of asphalt mixture

The research about the influence of deicing materials on the performance of asphalt mixture was introduced. The main deicing materials, mechanism of deicing or snow melting, evaluation method and application effect were also summarized and analyzed. The influences of the material on the anti-freezing function and the performance of asphalt mixture were discussed. The results showed that when compared with original asphalt mixture, the snow melting performance of salt storage asphalt mixture had been significantly improved, because the freezing points of water solution and interfacial adhesion between ice layer and pavement is reduced. This is quantitatively assessed by pull out test or interlaminar shear strength test. The pavement performance especially water stability of asphalt mixture decreased obviously after Mafilon was added. When Verglimit-260 was added into the asphalt mixture, the water stability and low temperature performance were both reduced. The particle size, displacement method, dosage of Icebane material and mineral aggregate gradation all have significant influence on the performance of asphalt mixture. Compared with salt storage asphalt mixture, the pavement performance of above mixture could be improved by using high viscosity modified asphalt or additives.