Study on the Physical Mechanical and Hydraulic Properties of Foamed MixtureLightweight Soil Mixed with Bauxite Tailings
OU Xiaoduo1,2,3, PENG Yuansheng1,2,3, MO Peng1,2,3, JIANG Jie1,2,3
1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; 2 Security Key Laboratory of Disaster Prevention and Structural Engineering, Nanning 530004, China; 3 Guangxi Engineering Research Center for Metallic Tailings Security Prevention and Control, Nanning 530004, China
Abstract: In order to make better use of a large amount of discarded bauxite tailings (BTs), the foamed mixture lightweight soil mixed with BTs (FMLSB) was proposed. The changes rules of fluidity, unconfined compressive strength, volume water absorption and microstructure of FMLSB under four designed wet densities were studied. Furthermore, the relationship between unconfined compressive strength and wet density was established, and the variation of volume water absorption with soaking time was revealed. The results show that unconfined compressive strength increases with the designed wet density increases. BTs can not only be used as aggregate of FMLSB, but also as cementing material to replace part of cement. The unconfined compressive strength increases exponentially as the wet density increases. The wet density and volume water absorption of FMLSB firstly increase rapidly with soaking time increases, then becomes slowly and finally tends to be stable, and the volume water absorption decreases with the designed wet density increases. With the increase of the content of cement and BTs and the decrease of foam content, the number of pores becomes rare, as well as the pores are not connected with each other, which makes the strength increase significantly. The application of this material will bring great economic and environmental benefits to engineering construction.
欧孝夺, 彭远胜, 莫鹏, 江杰. 掺铝土尾矿泡沫轻质土的物理力学及水力特性研究[J]. 材料导报, 2020, 34(Z1): 241-245.
OU Xiaoduo, PENG Yuansheng, MO Peng, JIANG Jie. Study on the Physical Mechanical and Hydraulic Properties of Foamed MixtureLightweight Soil Mixed with Bauxite Tailings. Materials Reports, 2020, 34(Z1): 241-245.
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2020, Vol. 34 
