阻燃温拌沥青混合料低温性能研究

Study on low temperature performance of flame retardant and warm-mix asphalt mixture

基于低温弯曲蠕变试验,就温拌剂和阻燃剂对沥青混合料低温性能的影响进行了研究。对Burgers模型参数的分析表明,阻燃剂和温拌剂对沥青混合料的低温性能具有明显的降低作用。应力松弛时间、蠕变速率、蠕变速率与劲度模量比三个参数对低温性能的描述效果是不同的,分析认为用蠕变速率与劲度模量比反映低温性能是最为准确的。

Based on low temperature flexural and creep test, the effects of warm - mix agent and flame retardant on low temperature performance of asphalt mixture are studied in this paper. The analysis on parameters of Burgers model shows that, flame retardant and warm - mix agent have a significant effect on reducing low temperature performance of asphalt mixture. Stress relaxation time, creep rate, the ratio of creep rate and stiffness modulus, these three parameters have different description on low temperature performance. The analysis believes that the ratio of creep rate and stiffness modulus is the most accurate on reflecting low temperature performance.