高模量剂粒度对沥青混合料性能的影响

Influence of Particle Size of High Modulus Agent on Performance of Asphalt Mixture

摘要:

将某高模量剂原样及其磨细样本分别分散到基质沥青中获得2种高模量沥青胶结料，利用扫描电子显微镜和动态剪切流变试验分析了高模量剂在沥青胶结料中的微观分散状态和沥青胶结料的宏观力学特性；然后以2种粒度的高模量剂制备了高模量沥青混合料，分别利用抽提试验和沥青混合料路用性能试验对比了高模量剂在沥青混合料中的熔融状态及其对沥青混合料路用性能的影响.结果表明：降低高模量剂粒度可实现其与沥青更好的分散与混融效果，提高沥青胶结料的存储模量，且可改善高模量沥青混合料的路用性能.

Abstract:

Some common high modulus agent was selected together with its ground up powder to prepare high modulus asphalt binders, then the microscopic dispersion state of high modulus agents and macroscopic mechanics of asphalt binders were analyzed by scanning electron microscope(SEM) and dynamic shear rheological test. The melting effect and road performance of asphalt mixture with high modulus agent in different particle sizes were evaluated by extraction test and road performance test. Results show that reducing particle size of high modulus agent will result in satisfied dispersion effect and melting state in asphalt binder, increase the storage modulus of asphalt binder, and improve the road performance of high modulus asphalt mixture.