Environmental Impact Assessment and Total Cost Analysis of BOF and BSSF Slag in Asphalt Concrete
This article has been corrected.
VIEW CORRECTIONPublication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
Dense grade asphalt concrete (DGAC), a popular surface material in Taiwan, allows for the design of the new recycling materials to reduce the use of natural aggregate. Basic oxygen-furnace (BOF) and Baosteel slag short-flow (BSSF) slag as steel byproduct are rarely used and generally disposed of. This study explores the environmental impact of replacing some of the coarse aggregates with steel slag in DGAC. Four levels of aggregate replacement (10, 20, 30, and 100%) were analyzed. Simulation results indicate that the replacement of coarse aggregate with BOF and BSSF slag increases the global warming potential (GWP) up to 7.13% compared to traditional DGAC during the production phase due to its specific gravity. However, using BOF and BSSF slag saves up to 36.41% of total cost included and reduces the environmental impact by decreasing the use of natural aggregate and the disposal of slag. Based on this result, replacement of a coarse natural aggregate with BOF and BSSF slag in DGAC is feasible and worthy of further research.
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Acknowledgments
The authors appreciate the financial support of the National Central University and CHC Resources Corp.
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Feb 28, 2016
Accepted: Dec 2, 2016
Published online: Mar 3, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 3, 2017
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