INFLUENCE OF SELECTED ADDITIVES ON WARM ASPHALT MIXTURES PERFORMANCE

Abstract

Warm Mix Asphalt (WMA) is a technology that allows significant lowering of the mixing and compaction temperature of conventional Hot Mix Asphalt (HMA). This research presents the results of laboratory tests conducted to evaluate the properties and performance of warm mix asphalt. TheWMA has been prepared from two asphalt grades and one aggregate source with twoadditives (Aspha-min® and Sasobit®). The crumb rubber is also added to WMA which is prepared withAspha-min® and Sasobit® to evaluate effect of crumb rubber on WMA properties. The results of the study indicated that the two additives to the warm asphalt affected the mixture properties differently. When the mixture properties were compared, it was observed that Aspha-min® reduced the indirect tensile strength and resilient modulus values of the mixes, the two WMA additives increased the rut depths of the mixes, and both the additives reduced the tensile strength ratio of the mixes.WMA contains crumb rubber appears