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Sustainability 2016, 8(4), 384; doi:10.3390/su8040384

Investigation on the Effect of Recycled Asphalt Shingle (RAS) in Portland Cement Mortar

1
Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 12800 Pegasus Drive, Orlando, FL 32816, USA
2
Department of Civil Engineering, School of Urban and Civil Engineering, Hongik University, 94, Wausan-ro, Mapo-gu, Seoul 04066, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Muge Mukaddes Darwish
Received: 4 March 2016 / Revised: 6 April 2016 / Accepted: 14 April 2016 / Published: 19 April 2016
(This article belongs to the Section Sustainable Engineering and Science)
View Full-Text   |   Download PDF [4067 KB, uploaded 19 April 2016]   |  

Abstract

Tear-off roofing shingle, referred to as Reclaimed asphalt shingle (RAS), is the byproduct of construction demolition and it is a major solid waste stream in the U.S. Reuse of this byproduct in road construction sector can contribute to the success of materials sustainability as well as landfill conservation. Ground RAS has similar particle distribution as sand and its major component includes aggregate granules, fibers, and asphalt. To promote the beneficial utilization of RAS, this study evaluates the effect of RAS in cement mortar when used as replacement of sand. In addition, the study investigates how cellulose fibers from RAS behave under high alkaline environment during cement hydration process, which may significantly affect mortar’s strength performance. The laboratory study includes measurements of physical, mechanical, and durability behaviors of cement mortar containing RAS replacing sand up to 30%. It was found that the optimum mixture proportions are 5% and 10% for compressive strength and toughness, respectively. View Full-Text
Keywords: cement mortar; reclaimed asphalt shingle (RAS); cellulose fiber; toughness; crack propagation cement mortar; reclaimed asphalt shingle (RAS); cellulose fiber; toughness; crack propagation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

An, J.; Nam, B.H.; Youn, H. Investigation on the Effect of Recycled Asphalt Shingle (RAS) in Portland Cement Mortar. Sustainability 2016, 8, 384.

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