SBS modified asphalt is developed and the effect of different SBS usages and different morphologies of SBS in different kinds of asphalts on the -properties of SBS modified asphalts is investigated.

采用国产SBS掺入五种牌号的沥青中，研究了SBS用量、SBS在不同沥青中的分散形态及其对改性沥青性能的影响。

It has been found that the age hardening of asphalts is mainly due to the increase of asphaltene…

沥青质含量的增加是沥青老化后性质变坏的重要原因。

It has been found that the age hardening of asphalts is mainly due to the increase of asphaltene content.

沥青质含量的增加是沥青老化后性质变坏的重要原因。

Other products, for example, gasolines, aromatic solvents, and even some asphalts , are totally or partly synthetic.

其它石油产品，如汽油、芳烃溶剂甚至包括有些沥青，则是通过完全或部分合成而制造的。

This report will attempt to provide those seeking to beneficiate asphalts with a summary of the pertinent results of the SHRP Asphalt Research Program.

本报告试图为那些正在寻求为改善沥青性能的人提供高速公路战略研究项目中的沥青研究项目有关结果之概要。