Effect of Polymer and Warm mix Modification on Asphalt Mixture Properties

Abstract

Among various kinds of asphalt binder modification methods, polymer modification and warm mix modification are two of the most popular ones. While polymer modification improves the lower and higher temperature performances of the asphalt mixture, warm mix modification reduces the mixing and compaction temperatures. So, the present study examines the effect of warm mix and polymer modification on the Marshall properties and moisture susceptibility of the asphalt mixes. In order to take advantage of both these popular modification methods, warm mix polymer modified bitumen (WMPMB) was prepared by mixing polymer and warm mix modifier in the conventional binder. The effect of the combined modification (warm mix and polymer) was studied with the help of experiments on the asphalt binders and mixtures. Based on the results it is concluded that using both the modifiers together we can avail the benefits of both the modification methods.