压实温度对沥青混合料的性能影响及试验分析

Influence of Compaction Temperature on Performance of Asphalt Mixture and Experimental Analysis

压实温度对沥青路面的铺筑影响极大,通过混合料指标进行直接评价,可更好地把控沥青混合料的合理施工温度及质量,本文采用不同压实方式下的沥青混合料,对不同温度下的性能指标进行分析,得出:采用击实成型的试件,随着压实温度的降低,空隙率逐渐增大、稳定度相对减小;压实温度对采用基质沥青的混合料较改性沥青的影响显著;采用旋转压实成型方式,得到不同级配的沥青混合料具有不同温度压实敏感性,需进行不同温度下的试压实,根据目标设计空隙率进行施工温度选择。

Compaction temperature has a great influence on the paving of asphalt pavement. The reasonable construction temperature and quality of asphalt mixture can be better controlled by the direct evaluation of mixture index. Based on the analysis of the performance indexes under different temperatures, it is concluded that the void ratio increases and the stability decreases with the de-crease of compaction temperature;the influence of compaction temperature on the mixture with matrix asphalt is more significant than that of modified asphalt;the asphalt mixture with different gradation has different temperature compaction sensitivity by rotary compaction. The trial com-paction at different temperatures is required, and the construction temperature is selected ac-cording to the target design porosity.