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Influence of Bayer Red Mud on the Operational and Mechanical Characteristics of Composite Cement Mortar

Cheng Hu1,2, Weiheng Xiang1,3,*, Ping Chen2,3, Yi Yang4,5, Libo Zhou3, Jiufang Jiang5, Shunkai Li2,4, Yang Ming1, Qing Li3

1 Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin University of Technology, Guilin, 541004, China
2 College of Civil and Architectural Engineering, Guilin University of Technology, Guilin, 541004, China
3 Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials, Guilin University of Technology, Guilin, 541004, China
4 Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin, 541004, China
5 Guangxi Postdoctoral Innovation Practice Base, Guangxi Yufeng Cement Group Company Limited, Liuzhou, 545008, China

* Corresponding Author: Weiheng Xiang. Email: email

Journal of Renewable Materials 2023, 11(11), 3945-3956. https://doi.org/10.32604/jrm.2023.027544

Abstract

The aim of this study is to enhance the value and utilization of red mud generated in the Bayer process by preparing composite cement mortars. The effects of two different types of Bayer red mud with varying physical and chemical characteristics on the fluidity, mechanical strength, mineral composition, and microstructure of the composite cement mortar were systematically evaluated. The results showed that the optimal addition of red mud A was 10 wt%, while it was 20 wt% for red mud B. The mechanical properties of the composite cement mortar met the standards for P·O42.5 cement. Furthermore, the composite mortar with the addition of red mud B showed higher flexural and compressive strengths compared to the composite mortar with red mud A. This improvement is attributed to the smaller particle size of red mud B, which filled the micro-pores and increased the compactness of the cement stone, as well as its higher content of Na2O, K2O, and other free alkalis, which resulted in more obvious alkali activation, accelerating the hydration of the active minerals in the slurry.

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APA Style
Hu, C., Xiang, W., Chen, P., Yang, Y., Zhou, L. et al. (2023). Influence of bayer red mud on the operational and mechanical characteristics of composite cement mortar. Journal of Renewable Materials, 11(11), 3945-3956. https://doi.org/10.32604/jrm.2023.027544
Vancouver Style
Hu C, Xiang W, Chen P, Yang Y, Zhou L, Jiang J, et al. Influence of bayer red mud on the operational and mechanical characteristics of composite cement mortar. J Renew Mater. 2023;11(11):3945-3956 https://doi.org/10.32604/jrm.2023.027544
IEEE Style
C. Hu et al., "Influence of Bayer Red Mud on the Operational and Mechanical Characteristics of Composite Cement Mortar," J. Renew. Mater., vol. 11, no. 11, pp. 3945-3956. 2023. https://doi.org/10.32604/jrm.2023.027544



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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