Natural bitumen and simulated bitumen samples in different genesis have been analyzed and studied systematically using liquid chromatograph and several other analytical instruments.

The article introduced the category of natural bitumen and the characteristic of gilsonite.

Mechanism of natural asphalt s modification and its performance;

Based on the current research and development of natural asphalt in road engineering both in China and abroad, this paper systematically analyzes and examines the changes on the properties of base petroleum asphalt when adding four types of typical natural asphalts (including rock asphalt of Xinjiang , Sichuan and Utntahite as well as lake asphalt of TLA).

According to the characteristics of SBS modified asphalt and natural asphalt,the design method has been applied by the author.

Advances in application studies of natural astaxanthin in aquaculture;