An evaluation of reclaimed asphalt shingles in hot mix asphalt by varying sources and quantity of reclaimed asphalt shingles

Abstract

The practice of incorporating reclaimed asphalt pavement (RAP) into hot mix asphalt (HMA) is common within the paving industry as a cost-effective source of quality paving binder and aggregate. Recently, research efforts have focussed on investigating the potential of using reclaimed asphalt shingles (RAS) in HMA. This study provides a comparison of the laboratory performance of several HMA mixtures with varied RAS sources and contents. Performance testing for the mixtures included dynamic modulus and phase angle. Fatigue testing was also performed for several of the mixtures. Mixtures with higher amounts of binder replacement from RAS showed stiffer performance at high temperatures and less stiff performance at low temperatures. The mixture with greater amounts of RAS showed better fatigue performance. The mixtures with various sources of RAS, whether pre-or post-consumer, showed similar low-temperature performance, while the mixture with a blend of both sources was stiffest at high temperatures. A set of mixtures comparing different RAS sources was also compared with a mixture containing RAP as the only recycled binder source. The results of testing of these mixtures showed that the RAP mix was stiffer at intermediate and high temperatures but had similar results to the RAS mixtures in low-temperature performance.

Reclaimed Waste Materials in Sustainable Pavement Construction

“…There are varied recommendations on the quantity of RAP (Al-Qadi et al 2007) or RAS (Barry et al 2013;Mauoin 2010;Foxlow et al 2011) that may be utilized (Aravind and Das 2007b) in the recycled mix. Efforts are being made to maximize the quantity of RAP in the recycled mix, without compromising with the engineering property of the mix (Oliveira et al 2013).…”

How Does the European Recovery Target for Construction & Demolition Waste Affect Resource Management?

“…Recovered asphalt based roofing materials can be recycled into paving asphalt by existing techniques [7]. Even though the amount of asphalt roofing material is small compared to paving asphalt, the bitumen content is not negligible.…”