Chapter
Jun 5, 2015
Low Temperature Performance of Superpave Recycled Hot Mixtures in Ontario
Authors: Xiomara Sanchez, Ph.D. [email protected], Doubra C. Ambaiowei, Ph.D. [email protected], and Susan L. Tighe, Ph.D. [email protected]Author Affiliations
Publication: Airfield and Highway Pavements 2015
Abstract
One of the effects of climate change is the drop in the extreme temperature during winter season. The impact that this phenomenon has on pavement performance is a concern, especially for the Hot Mix Asphalt (HMA) surface layers. The increasing use of sustainable techniques, like the addition of Reclaimed Asphalt Pavement (RAP), poses a challenge to enduring extremely low temperatures. This study examines the performance of typical Ontario Superpave surface course HMA to thermal cracking. Thermal Stress Restrained Specimen Tests (TSRST) and Disk-Shaped Compact Tension Tests (DC(T)) were conducted on six laboratory prepared hot mixtures with varying RAP contents and Asphalt Binder Performance Grade (PG). The results suggest that the Recycled Hot Mixtures (RHM) do not always withstand the expected critical temperatures, but they could exhibit a lower impact in fracture strength when the extreme low temperature drops by 6°C.
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© 2015 American Society of Civil Engineers.
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Published online: Jun 5, 2015
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D.C. Campbell Chair in Highway Construction and Pavement Research / Assistant Professor, Department of Civil Engineering, University of New Brunswick, 17 Dineen Drive, Fredericton, NB, Canada E3B 5A3. E-mail: [email protected]
Research Associate / Course Instructor, Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, Canada N2L 3G1. E-mail: [email protected]
P.Eng
Professor and Canada Research Chair in Pavement and Infrastructure Management / Norman W. McLeod Professor in Sustainable Pavement Engineering / Director, Centre of Pavement and Transportation for Technology, Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, Canada N2L 3G1. E-mail: [email protected]
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