Abstract
The limit in the use of reclaimed asphalt pavement material (RAP) proportion is restricted due to stiffness and workability issues related to RAP. This problem is addressed with the help of warm mix asphalt (WMA) which increases the proportion of RAP used by producing mixes having same/better properties viz., better workability, reduced viscosity than hot mix asphalt (HMA) at lower temperatures. This paper reviews research conducted on the use of RAP material in WMA pavements. It presents and discusses work done with regard to different recycling methods and on conversion of RAP into HMA. It analyzes the benefits/need of using RAP in WMA in light of previous research findings and the influence on engineering properties of WMA due to RAP introduction. This paper also discusses field performance, environmental/economic impact and some limitations of these mixes.
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