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Laboratory Investigation Effect of Warm Mix Additives on the Viscosity of SBS Modified Asphalt

Warm Mix Asphalt (WMA) technology has become increasingly popular in pavement construction because of its environmental benefits and its fine engineering properties. In order to optimize mixing performance of WMA, four kinds of warm mix additives used in China were evulated by viscosity testing. Thus, this paper is mainly to reduce bitumen viscosity, which in turn improves mix workability, produces fewer emissions, and generally creates better working conditions. Results identified that the Sasobit additive has a large viscosity reduction and has a fine workability, and is appropriate for pavement construction.