多聚磷酸与 TPS 复合改性沥青及排水性沥青混合料耐久性试验研究

摘要

The drainage asphalt mixture porosity,prone to heat aging and ultraviolet aging,in order to improve durability of drainage asphalt mixture,poly﹣phosphate and TPS composite modified methods were proposed.The effects of TPS and PPA content on viscosity modified asphalt and road performance of porous asphalt mixture were studied,and with 14% TPS modified asphalt were compared.The results showed that,adding PPA can significantly improve the high temperature stability and fatigue durability of TPS modified asphalt mixture,the use of PPA and TPS composite modified can significantly improve the heat aging and ultraviolet aging properties of drainage asphalt mixture,while reducing the TPS con﹣tent.TPS and PPA using complex high﹣dose regimen with TPS modified asphalt is technically feasible,and recommend the best TPS and PPA composite modified solutions is 12% TPS +1 % PPA.%排水性沥青混合料空隙率大，易于产生热老化和紫外线老化现象，为了提高排水性沥青混合料的耐久性，提出采用多聚磷酸与 TPS 复配方案，研究了 TPS 和 PPA 掺量对高粘改性沥青和排水性沥青混合料性能的影响，并与14％TPS 改性沥青混合料进行了对比。试验结果表明，掺加 PPA 可显著改善 TPS 改性沥青混合料的高温稳定性和抗疲劳耐久性，采用 PPA 对 TPS 改性剂复配方案可显著改善排水性沥青混合料的抗热老化和紫外线老化性能，同时降低 TPS 掺量。采用 TPS 与 PPA 复配方案替代高剂量 TPS 改性沥青在技术上可行，推荐了最佳的TPS 与 PPA 复配方案为12％TPS ＋1％PPA。