ABSTRACT
Use of Warm Mix Asphalt (WMA) technologies is known as an effective method to reducing the energy consumption and emissions associated with conventional Hot Mix Asphalt (HMA) production. WMA technologies show significant benefits, such as extended window of paving season, attaining better compaction and providing longer haul distances. As a result, nowadays, WMA technologies are gaining more acceptance and popularity among asphalt industry compared to HMA. In a broad sense, WMA technologies are categorized as organic additives, chemical additives and those utilize foaming (i.e., water-bearing additives and water-based processes). The objective of this paper is to present an overview on different WMA technologies, and highlight the benefits and challenges associated with their application. The present literature review aims to indicate the areas where more research is needed to be used as a useful tool by pavement engineers who are interested in the implementation of WMA technologies.
