Fall 2014/Spring 2015 HERE Projects

Enhancing Green Paving in Oklahoma Using Recycled Asphalt Shingles Prof. Musharraf Zaman School of Civil Engineering and Environmental Science Each year, an estimated 11 million tons of old asphalt shingles from roofs are disposed of in the United States. In Oklahoma, it costs between $50 and $150 per ton, depending on size and kind of debris, to dispose of these materials in landfills. Recent studies have shown that recycled asphalt shingles (RAS) contain hard crushed aggregates, viscous binders, and fibers that are desirable for the production of hot mix asphalt (HMA) for paving applications. Using only 5% RAS in HMA can save $1 $2.80 per ton and improve the quality of the mix. The proposed study will investigate the volumetric properties and performance (moisture damage potential, rutting and fatigue) characteristics of HMA mixes containing RAS. One commonly used asphalt shingle in Oklahoma and one commonly used aggregate and virgin binder will be used. The proposed study will enhance “green paving” in Oklahoma.