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

Jinwoo An, Boo Hyun Nam and Heejung Youn
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Jinwoo An: Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 12800 Pegasus Drive, Orlando, FL 32816, USA
Boo Hyun Nam: Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 12800 Pegasus Drive, Orlando, FL 32816, USA
Heejung Youn: Department of Civil Engineering, School of Urban and Civil Engineering, Hongik University, 94, Wausan-ro, Mapo-gu, Seoul 04066, Korea

Sustainability, 2016, vol. 8, issue 4, 1-16

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.

Keywords: cement mortar; reclaimed asphalt shingle (RAS); cellulose fiber; toughness; crack propagation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2016
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