What are the main types of modified asphalt?

Modified asphalt is an asphalt binder made by adding rubber, resin, high molecular polymer, ground rubber powder or other fillers (modifier), or taking measures such as mild oxidation processing of asphalt to improve the performance of asphalt or asphalt mixture.

There are two mechanisms for modifying asphalt: one is to change the chemical composition of asphalt, and the other is to make the modifier evenly distributed in asphalt to form a certain spatial network structure.

1. Rubber and thermoplastic elastomer modified asphalt

Including: natural rubber modified asphalt, SBS modified asphalt (most widely used), styrene butadiene rubber modified asphalt, chloroprene rubber modified asphalt, CIS polybutadiene rubber modified asphalt, butyl rubber modified asphalt, waste rubber and recycled rubber modified asphalt, and other rubber modified asphalt (such as ethylene propylene rubber, nitrile rubber, etc.).

2. Plastics and synthetic resin modified asphalt

Including: polyethylene modified asphalt, ethylene vinyl acetate polymer modified asphalt, polystyrene modified asphalt, xiangdoutong resin modified asphalt, epoxy resin modified asphalt α- Olefin random polymer modified asphalt.

3. Blended polymer modified asphalt

The asphalt is modified by adding two or more polymers to the asphalt at the same time. More than two kinds of polymers can be two separate polymers or polymer alloys that are blended in advance to form polymer interpenetrating networks.