Green Stabilization of Bauxite Tailings: Mechanical Study on Alkali-Activated Materials
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 11
Abstract
This study evaluates the alkali activation of a binary system composed of sugar cane bagasse ash and carbide lime as a green stabilization technique for bauxite tailings (BTs). To analyze the feasibility of this alternative binder as a stabilizer, mechanical tests were performed to measure the strength, stiffness, and durability of BT binder mixtures. As a control group, tailings were stabilized with high-initial-strength portland cement (Type III). The results show that the alternative binder is a suitable option to improve the mechanical behavior of bauxite tailings. The porosity/binder index () was an appropriate parameter for evaluating BT stabilization. Reduced porosity and increased binder content (decreased ) led to an improvement in the mechanical behavior of the studied mixtures.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors wish to express their appreciation to FAPERGS/CNPq 12/2014—PRONEX (Project #16/2551-0000469-2), MCT-CNPq (Editais INCT-REAGEO, Universal & Produtividade em Pesquisa), and MEC-CAPES (PROEX) for their support of the research group.
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 11 • November 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Nov 18, 2020
Accepted: Mar 22, 2021
Published online: Sep 2, 2021
Published in print: Nov 1, 2021
Discussion open until: Feb 2, 2022
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