ABSTRACT

The chemical compositions of asphalt and mineral type are always related to interface adhesion performance, and further affect the field performance of asphalt mixture. This study aims to evaluate the effects of mineral type as well as bitumen types experiencing different ageing process on the adhesion property of interface. Adhesion energy and adhesion work of different bitumen and mineral combinations were calculated in dry or wet condition. Results show that different asphalt ageing mechanisms have significantly different effects on bitumen–mineral interface adhesion performance. Interfacial adhesion work increases with the increase of asphaltene and resin fractions in bitumen. Both sulfoxide and ketone can effectively improve the interface adhesion between bitumen and mineral. Water adversely affects the adhesion of asphalt–mineral interface. Calcite-bitumen has excellent resistance to water stripping for lower adhesion work loss rate than quartz-bitumen combination no matter what SARA or chemical structure of bitumen.

摘要

沥青的化学成分和矿物类型总是与界面粘附性能有关，进而影响沥青混合料的现场性能。本研究旨在评估矿物类型以及经历不同老化过程的沥青类型对界面粘附性能的影响。在干或湿条件下计算不同沥青和矿物组合的粘附能和粘附功。结果表明，不同的沥青老化机制对沥青-矿物界面粘附性能有显着不同的影响。界面粘附功随着沥青中沥青质和树脂含量的增加而增加。亚砜和酮均能有效提高沥青与矿物的界面附着力。水对沥青-矿物界面的附着力有不利影响。