水性乳液对聚合物改性沥青封层性能的影响

Effect of Waterborne Emulsion on Performance of Polymer-modified Fog Seal Materials

摘要:

通过三大指标试验、重复蠕变恢复（MSCR）试验、振幅扫描和频率扫描试验，研究了雾封层材料对老化沥青的再生效果。随后，进行了雾封层材料浸泡马歇尔试件的冻融劈裂试验和肯塔堡飞散试验，分析了雾封层材料对沥青混合料耐久性能的影响。结果表明：水性丙烯酸酯和水性聚氨酯起到了协同增强效果，提高了沥青的弹性性能；水性乳液中的氨基甲酸酯和羧基极性基团显著提高了沥青混合料的水稳定性和抗松散性能。显著性检验和灰色关联分析结果表明，雾封层材料再生性能指标之间存在较强的一致性。

Abstract:

The traditional indexes test， multiple stress creep and recovery （MSCR） test， amplitude sweep and frequency sweep test were conducted to study the rejuvenation effect of fog seal material on aging asphalt. Then， the freeze-thaw splitting test and Cantanbro stripping test of Marshall specimens soaked in fog seal materials were also conducted to explore the effect of fog seal materials on the durability of asphalt mixture， respectively. It is shown that the waterborne acrylate and waterborne polyurethane play a synergistic enhanced effect and improve the elastic properties of asphalt. The fog seal materials with carbamate and carboxyl polar groups enhance water stability and anti-loosening performance of asphalt mixture significantly. According to the significance testing and grey relational analysis， the regeneration indexes of the fog seal materials present a strong consistency.