基于分步设计的温拌沥青混合料温度设计方法

Design Method of Warm Mix Asphalt Mixture Temperature Based on Step by Step Design

采用沥青混合料轮碾成型机,运用等体积参数原则,研究了Evotherm温拌沥青混合料的集料加热温度、混合料成型温度下限值.结果表明:运用马歇尔-轮碾分步设计法设计的温拌沥青混合料水稳定性及疲劳性能试验结果均优于热拌沥青混合料,其他指标与热拌沥青混合料相当;在材料组成、成型方式相同的情况下,借助热拌沥青混合料成熟的油石比设计方法以及马歇尔-轮碾分步设计法可以较为准确地确定温拌沥青混合料集料加热温度和混合料成型温度,使设计的温拌沥青混合料降温环保效果显著.

By using asphalt wheel rolling machine, the aggregate heating temperature and the mixture formation lower limit temperature of the Evotherm warm mix asphalt mixture were studied on the equal volume parameter principle. It was found that the water stability and fatigue performance of it are better than that of the hot mix as- phalt mixture designed by Marshall wheel rolling method. Other indexes are equivalent to that of hot mix asphalt mixture. The results show that for the same material composition and method of formation, by the design methods of hot mix asphalt mixture asphalt-aggregate ratio and the Marshall wheel rolling machine, the temperature of warm mix asphalt mixture heating and mixing material forming can be determined more accurately and the temper- ature environmental protection of it will he more effective.