基于MMLS3的连续式弹塑性伸缩缝填缝料流变性能研究

Research on Rheological Properties of Modified Asphalt Mixtures for Continuous Elastic-plastic Expansion joints Based on MMLS3

利用加速加载设备MMLS3研究了连续式弹塑性伸缩缝的填缝料在60℃下的流变性能,试验表明：填缝细料（单一粒径6~10mm的改性沥青混合料）的高温稳定性优于填缝粗料（单一粒径14~19mm改性沥青混合料）;车辙变形、车辙深度与加载次数均有良好的线性关系;车辙变形曲线存在两个阶段,即迅速增加的压密阶段和稳定增加的蠕变阶段,压密阶段的车辙深度增大趋势明显大于蠕变阶段。

The rheological properties of continuous elastic-plastic expansion joints＂ modified asphalt mixture at 60℃ is studied by the load simulator system MMLS3. The results show that the high temperature stability of the modified asphalt mixtures with finely grain of 6-10mm is better than that of coarse grained of 14-19mm; both of rutting deformation and rutting depth have a good linear relationship with the loading times; and the rutting deformation curve have two stages-the rapidly increasing compaction stage and the stably increasing creep stage, and the former＇s rutting depth increased tendency is obviously bigger than the latter＇s.