Description
Historically open graded friction course hot mix materials have had poor performance when utilizing conventional asphalt cement or polymer modified asphalt cement as the binder. High air void contents (14 – 18 %) can lead to moisture damage and premature aging which will accelerate the stripping of the mix from the roadway and inevitably unsafe driving conditions. This lack of long-term performance along with required increased maintenance activity and costs caused many jurisdictions to curtail use of this type of rehabilitation strategy.
This paper will discuss the use of asphalt rubber materials as the binder for open graded friction course applications. Proper binder design, mix design and construction procedures will be discussed and applied to the benefits concerning the use of asphalt rubber open graded friction course (AR-OGFC).
