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Advances in Materials Science and Engineering
Volume 2018, Article ID 8784232, 14 pages
https://doi.org/10.1155/2018/8784232
Research Article

Analysis on Physical and Mechanical Properties of Red Mud Materials and Stockpile Stability after Dilatation

1School of Civil & Architecture Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
2Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education (China Three Gorges University), Yichang, Hubei 443002, China

Correspondence should be addressed to Chao Yang; moc.nuyila@0101innav

Received 10 January 2018; Revised 6 March 2018; Accepted 22 April 2018; Published 21 May 2018

Academic Editor: Federica Bondioli

Copyright © 2018 Yanbo Feng and Chao Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Red mud is the tailings generated from the production process of aluminum industry and is mainly stacked in open-air at present, so how to ensure the stability of red mud stockpile is very important. Regarding mud stockpile of Guizhou Aluminum Factory as the research object, this paper studies the physical and mechanical properties of Bayer red mud from wetting process, Bayer red mud from drying process, and sintering red mud through laboratory test and finally analyzes its stability under extreme rainfall condition in this region by the Geo-Studio software. The research results show that the red muds in different processes have big difference in physical and mechanical properties. The strength of sintering red mud is about 4.2 times of that of Bayer red mud from wetting process on average, and the strength of Bayer red mud from drying process is about 1.5 times of that of Bayer red mud from wetting process on average. So, the sintering red mud can be used as the subdam of red mud stockpile, to reduce the risk of collapse and dam break. The stability coefficients of the mixed stocking method under three rainfall conditions are 2.611, 2.597, and 2.631, respectively, all of which are above 1.0. It reveals that the dilatation scheme of using the sintering red mud with good engineering properties to stockpile the Bayer red mud is feasible. It can not only guarantee the safety and stability of red mud stockpiles, but also reduce the risk of red mud dam break and the capital investment of red mud yard.