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Use of Red Mud in Soil Stabilization for Pavement Through Alkali Activation

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Characterization of Minerals, Metals, and Materials 2024 (TMS 2024)

Abstract

The concern about the amount of solid waste generated in aluminum production has led to studies on the reuse of this waste in various types of construction materials. This research investigated the use of red mud in soil stabilization for pavement through alkali activation. Experiments with tropical soil and red mud activated with NaOH (6, 8, and 10 mol) aimed to optimize the soil properties. The mixture was evaluated for mechanical performance, and ideal proportions of mud (10, 20, 30, and 40%) were determined. Compaction curves were performed for different proportions of the residue, obtaining values for optimum moisture content and maximum density. There was an improvement in the strength of the samples with the replacement of up to 20% of red mud, and it showed a significant improvement, with results exceeding 300%, when compared to compaction without additives.

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Acknowledgements

The authors would like to thank the FAPEMIG agency for the financial support provided and the Sustainable and Innovative Construction Research Group (SICon) for the technical assistance.

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Correspondence to Sarah Souza Silva .

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Silva, S.S., Mendes, B.C., da Silva, T.O., Lopes, E.C., Ferreira, F.A., Pedroti, L.G. (2024). Use of Red Mud in Soil Stabilization for Pavement Through Alkali Activation. In: Peng, Z., et al. Characterization of Minerals, Metals, and Materials 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50304-7_67

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