掺铝土尾矿泡沫轻质土的物理力学及水力特性研究

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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.

Key words： bauxite tailings (BTs) foamed mixture lightweight soil (FMLS) compressive strength water absorption

Published: 01 July 2020

CLC number:

U414

Fund:This work was financially supported by the National Natural Science Foundation of China (51768006, 51978179), the Key R & D Program of Guangxi Pro-vince (Guike AB17195035).

About author:: Xiaoduo Ou received his Ph.D. degree in June 2004 from Guangxi University. He is currently a professor and doctoral supervisor in Guangxi University and mainly engaged in teaching and research work in fields of environmental geotechnical engineering, tailings reservoir safety management ; Jie Jiang received his Ph.D. degree in geotechnical engineering from Tongji University in 2008. He is currently a professor and master tutor in Guangxi University and mainly engages in teaching and research work in fields of geotechnical engineering.

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	OU Xiaoduo
	PENG Yuansheng
	MO Peng
	JIANG Jie

Cite this article:

OU Xiaoduo,PENG Yuansheng,MO Peng, et al. Study on the Physical Mechanical and Hydraulic Properties of Foamed MixtureLightweight Soil Mixed with Bauxite Tailings[J]. Materials Reports, 2020, 34(Z1): 241-245.

URL:

http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/241

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