Application of Gilsonite-Modified Slag as a Subballast Layer with Recommendations for Optimum Content of Gilsonite
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VIEW THE REPLYPublication: Journal of Materials in Civil Engineering
Volume 33, Issue 4
Abstract
Steel slag accumulation is one of the major issues for steel manufacturing companies, because it occupies a large portion of a company’s yard. Investigators have suggested various applications for using slag in other industries. There is great potential for using slag as an aggregate in road and railway construction. Evidence demonstrates the compatibility of slag for road base and subbase construction. However, the use of slag as a subballast for railway construction has not been investigated thoroughly. This research studied the application of slag to subballast railway construction. A railway subballast layer requires a high shear strength, which is greater than slag’s shear strength. Therefore, the authors modified the slag with 1%, 2%, and 3% gilsonite, or natural binder, and performed Los Angeles abrasion, direct shear, and California bearing ratio tests on the modified slag. The results of all experiments indicated significant improvement in the modified slag’s shear strength properties, which makes gilsonite-modified slag a potential replacement for traditional subballast material.
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Data Availability Statement
All data and models generated or used in this study appear in the published article.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 12, 2020
Accepted: Sep 14, 2020
Published online: Feb 1, 2021
Published in print: Apr 1, 2021
Discussion open until: Jul 1, 2021
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