Sustainable reuse of magnesite mine tailings in cement-treated expansive soil for enhanced subgrade performance: geotechnical and environmental analysis
Shanmugasundaram, Vinodhkumar; Shanmugam, Balaji; Kulanthaivel, Ponnusamy; Perumal, Priyadharshini (2024-09-04)
Taylor & Francis
04.09.2024
Shanmugasundaram, V., Shanmugam, B., Kulanthaivel, P., & Perumal, P. (2024). Sustainable reuse of magnesite mine tailings in cement-treated expansive soil for enhanced subgrade performance: geotechnical and environmental analysis. Journal of Taibah University for Science, 18(1). https://doi.org/10.1080/16583655.2024.2397861.
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© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.
https://creativecommons.org/licenses/by-nc/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202409135841
https://urn.fi/URN:NBN:fi:oulu-202409135841
Tiivistelmä
Abstract
This study explores the use of Magnesite Mine Tailings (MMT) as an admixture in cement stabilization of Expansive Soil (ES) to improve subgrade performance and reduce environmental impact. Various combinations of Ordinary Portland Cement (OPC) and MMT were investigated using standard proctor compaction, Unconfined Compressive Strength (UCS), California Bearing Ratio (CBR), durability and Toxicity Characteristic Leaching Procedure (TCLP) tests. Results showed enhanced ES strength with MMT and OPC, with a maximum UCS of 1179 kPa and a soaked CBR of 25.1% after 28 days. However, higher cement content (>12%) is necessary for durability and meeting environmental regulations. X-Ray Diffraction and Field Emission Scanning Electron Microscopy confirmed hydration products, supporting MMT as a sustainable solution for stabilization and tailings disposal.
This study explores the use of Magnesite Mine Tailings (MMT) as an admixture in cement stabilization of Expansive Soil (ES) to improve subgrade performance and reduce environmental impact. Various combinations of Ordinary Portland Cement (OPC) and MMT were investigated using standard proctor compaction, Unconfined Compressive Strength (UCS), California Bearing Ratio (CBR), durability and Toxicity Characteristic Leaching Procedure (TCLP) tests. Results showed enhanced ES strength with MMT and OPC, with a maximum UCS of 1179 kPa and a soaked CBR of 25.1% after 28 days. However, higher cement content (>12%) is necessary for durability and meeting environmental regulations. X-Ray Diffraction and Field Emission Scanning Electron Microscopy confirmed hydration products, supporting MMT as a sustainable solution for stabilization and tailings disposal.
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