Use of scrap tire as an asphalt modifier

The disposal of waste tires in the world primarily has three ways to deal with such as landfill, burning and recycling. Recycled tire rubber applied to pavement may be the best way to reduce waste tires in large quantities and, at the same time, improve some engineering properties of asphalt mixtures like higher smooth tire friction values. Crumb rubber can be incorporate by a wet process or dry process. et process refers to modification of asphalt cement binder with 5–25wt% of fine tire rubber crumb modifier (CRM) at an elevated temperature. The dry process includes mixing the rubber particles with aggregates prior to addition to asphalt. The main differences between the two processes consist in rubber particle size, rubber amount, rubber function, and incorporation facility . Chemical analysis of the asphalt and rubber blends by gel permeation chromatography indicates that some chemical modification occurs to the asphalt as a function of blending temperature and time.

کلیدواژه ها:

Scrap tire ، Rubberized asphalt ، Modifier