基于浸水车辙试验的沥青混合料高温性能研究

Study on High-temperature Performance of Asphalt Mixture Based on Immersion Rutting Test

针对高速公路沥青路面长大纵坡、弯道处等特殊路段高温稳定性不足,优选SBS改性沥青混合料、高模量沥青混合料,成型不同沥青面层结构的复合车辙板,进行浸水车辙试验,分析两者在不同的温度和荷载下对沥青面层抗高温形变的影响,为特殊路段沥青面层材料的选择和结构设计提供重要参考。结果表明:高模量剂对沥青混合料的高温稳定性提升效果更显著,为提高沥青面层耐久性提供了重要参考。

To deal with the high - temperature instability of asphalt pavement of special sections such as large longitudinal slopes and bends, composite - structured rutting plates with different asphalt surface courses paved with SBS modified asphalt mixture and high modulus asphalt mixture are formed to be applied in the immersion rutting test. Such two mixtures are analyzed to see their influences on the anti - deformation ability of the asphalt surface course in high temperature under different temperatures and loads, providing references for materials selection and structural design for asphalt pavement of special sections. The result shows that high modulus asphalt mixture helps improve the high -temperature ability greatly and can be regarded as important references for improving the performance of asphalt surface course.