橡胶沥青水老化试验研究

沥青路面的长期使用过程中，水是影响沥青老化的主要因素之一。为研究水老化作用方式及水量对橡胶沥青老化性能的影响，本文以橡胶沥青和TOR橡胶沥青两种材料为例，通过改变水作用阶段和用水量试验研究不同水老化方式对橡胶沥青老化后软化点、粘度、疲劳因子、蠕变劲度、蠕变速率的影响。试验结果表明：选择在压力老化前三分之一时间（400min）进行加水压力老化试验，后三分之二时间进行无水压力老化试验的水老化作用方式最具可行性；对比无水压力老化试验和加水压力老化试验可知，水的存在促进了橡胶沥青的热氧老化；随水量的增加，TOR橡胶沥青的高温稳定性能降低，抗疲劳开裂能力和低温性能降低，沥青老化加剧。

Experimental Study on Water Aging of Rubber Asphalt

Water is one of the main factors that influence asphalt aging on long-term use of the process of asphalt pavement.In order to study the impacts of the water work phase and the amount of water on performances of the rubber asphalt aging,taking rubber asphalt and TOR rubber asphalt for example,the influence of different water aging methods on softening point,viscosity,fatigue factor,creep stiffness and creep rate was studied through changing the water work phase and the amount of water.The test results showed that the way of the pressure aging with water for the beginning one third of standard time (400 min) and the pressure aging without water for the remaining two thirds of the time was selected for the most feasible.Comparison of pressure aging test and water pressure aging test,the existence of water can promote the thermal oxygen aging of rubber asphalt.With the increase of water,high temperature stability of TOR rubber asphalt is declined,anti-fatigue cracking performance and low temperature performance of TOR rubber asphalt is declined and asphalt aging intensifies.