ROAD ASPHALT MODIFIED BY COMPOSITE MODIFIER AND PREPARATION METHOD THEREOF

摘要

A road asphalt modified by a composite modifier and the preparation method thereof are provided. The modified road asphalt is obtained by allowing a base asphalt to modify by a composite modifier of a vulcanized rubber powder mixing with a thermoplastic styrene-butadiene rubber (SBS). The preparation method comprises the steps of adding a certain amount ofvulcanized rubber powders into a base asphalt, adding a thermoplastic styrene-butadiene rubber (a modifier) and a stabilizing agent, and obtaining said road asphalt after shearing and grinding via a colloid mill. The modified road asphalt has excellent rutting resistance and low-temperature anti-cracking property.