Steel Aggregate Swelling Potential in Layers of Road Pavements
Publication: Journal of Environmental Engineering
Volume 144, Issue 9
Abstract
Steel slag, one of the by-products from the production of steel, is crushed, sized properly, and treated in relation to its volume swelling potential to be used as a highly resistant aggregate called steel aggregate or steel gravel. This study analyzes the swelling mechanisms of steel aggregate. By laboratory testing, the volumetric swelling potential in samples of steel aggregate and samples of lateritic soil and steel aggregate mixtures was determined in two different proportions: 90% soil steel aggregate (M9010); and 80% soil steel aggregate, by weight (M8020). This analysis is part of a project that assesses the feasibility of the utilization of this coproduct in the construction industry in Brazil. Average swelling values of 0.92, 0.73, and 0.61% were obtained from the steel aggregate samples and from the M9010 and M8020 mixture samples, respectively. According to Brazilian and Japanese standard volumetric swelling limits, all tested materials are suitable for the use of paving as an alternative to the use of natural aggregates.
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Acknowledgments
The authors acknowledge the support of the following agencies: the Brazilian Council for Scientific and Technological Development (CNPq) (Grant No. 304721/2017-4), the Coordination for the Improvement of Higher Level Personnel (CAPES), the Support Research of the Federal District Foundation (FAP-DF), the Brazilian Transport Infrastructure Department (DNIT), the Brazil Steel Institute (BSI), and the University of Brasilia (UnB) for funding this research.
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Dec 9, 2016
Accepted: Mar 30, 2018
Published online: Jun 25, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 25, 2018
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