On the basis of research summarization of the pour point depressant for crude oil, the paper summarizes the influence of repeated heating and shear on the modified effect of crude oil treated with PPD,and points out that in the research of pour point depressant the property of anti-repeated heating and anti-shear of PPD to the modified effect should be enhanced.

Research both the mutual adaptability of SBS and asphalt from different sources and the changing regularity of modified effect and industrial,meanwhile, modification mechanism is analyzed by some chemical analysis means with the theory of polymer physic

Therefore,two kinds of chemicals that specially has obvious effects for high wax and asphaltene contents of Donglin pipelining crude oil have been developed and e-valuated,and meantime,a chemical having a good modifying effect for Donglin pipelining crude oil has been duplicated and their optimal proportion has been determined.

Evaluation of modification effect of epoxy resin based on performance of asphalt mixtures;

Effect of surface treatment on volume resistance and sensing effect of carbon nanotube-reinforced cement composites;

By XRD,BET,FT-IR and SEM,SiC nanoparticles before and after surface treatment were characterized.

This paper introduced the application of the coal resource filler after crushing and surface treatment in rubber,which included high sulfur coal,coal gangue stone,fly ash and coal cinder and so on,and the research progress about carbon and silica which were produced by the coal resource wastes.