玻璃纤维增强含硫尾砂胶结充填体的力学及流动性能研究

doi:10.11896/cldb.21110083

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Abstract In view of the particularity of the physical properties of cemented sulfur tailings backfill, the physical properties and flow properties of cemented sulfur tailings backfill (CSTB) were studied in detail through a series of laboratory tests and it was proposed to improve the physical pro-perties of CSTB by adding glass fiber. The results show that slurry fluidity basically follows the quadratic function increasing law with the increase of sulfur content. The fluidity of slurry decreases exponentially with the increase of fiber content, but the change of fiber length has no significant effect on the fluidity of slurry. The compressive strength and tensile strength of the cemented sulfur tailings backfill increased first and then decreased with the increase of fiber content, and both reached the maximum value when the fiber content was 0.6%. In addition, the increase of fiber length is also beneficial to improve the compressive strength and tensile strength of cemented sulfur tailings backfill and the improvement effect of fiber on tensile strength is obviously better than that of compressive strength. Moreover, the addition of fiber can not only significantly improve the compressive strength of the cemented sulfur tailings backfill, but also inhibit the strength deterioration of the cemented sulfur tailings backfill. The microstructure test shows that the fiber can effectively prevent the formation and expansion of pores and cracks, so as to improve the mechanical properties of CSTB and inhibit the strength deterioration of CSTB in the later stage.

Key words： fiber length fiber content glass fiber mechanical property flow performance microstructure

Published: Online: 2023-07-10

CLC number:

TD853

Fund:Key Program of National Natural Science Foundation of China(51734001) and the Fundamental Research Funds for the Central Universities (FRF-TP-18-003C1).

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	Articles by authors
	YIN Shenghua
	CAO Yong
	WU Aixiang
	HOU Yongqiang
	BAI Longjian

Cite this article:

YIN Shenghua,CAO Yong,WU Aixiang, et al. Study on Mechanics and Flow Behavior of Glass Fiber Reinforced Cemented Sulfur Tailings Backfill[J]. Materials Reports, 2023, 37(13): 21110083-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21110083 OR http://www.mater-rep.com/EN/Y2023/V37/I13/21110083

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