赤泥基绿色高性能注浆材料工程特性试验研究

doi:10.13722/j.cnki.jrme.2021.1281

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Abstract In order to promote the green development of geotechnical engineering and improve the resource utilization efficiency of solid waste，a green and high performance red mud-based grouting material was prepared by red mud，blast furnace slag，steel slag and desulfurized gypsum. The effects of red mud content and water to cement ratio on rheological property，setting time，mechanical strengthof red mud-based grouts were explored. The hydration characteristics of red mud-based grout are revealed based on the rheological kinetic characteristics of slurry. The leaching characteristics and stabilization mechanism of heavy metals in red mud-based grout were determined. The reinforcement mechanism of red mud-based grouts to the soft soil stratum，and the interface of the grout-soil were analyzed. The results show that the engineering performance of red mud-based grout is comparable to that of Portland cement slurry. Red mud has morphological effect and hydration characteristics，which can improve the rheological properties of slurry，but its gelling activity is low，with the increase of its content，the mechanical strength of stone tends to decline. When the content of red mud is 40%–60% and the water cement ratio is 0.8–0.9，the red mud-based slurry has the better working performance. The results of heavy metal analysis show that the leaching amount of heavy metals in red mud-based stone body is less than 0.2 ppm，which has the characteristics of green environmental protection for geological environment. The grouting simulation test shows that the red mud-based grouting material is mainly compaction-splitting diffusion in soft soil stratum，and can effectively improve the compressive strength of soft soil stratum by 47.6%. The test shows that the red mud-based grouting material has obvious performance advantages and better engineering applicability. The research results can provide green high-performance and low-cost grouting materials for underground engineering construction，and will also provide ideas for the resource utilization of solid wastes such as red mud.

Key words： construction materials grouting material red mud-based slurry workability rheological characteristics environment friendly reinforcement mode

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	Articles by authors
	ZHANG Jian1
	WANG Chuan1
	LI Zhaofeng1
	2
	GAO Yifan1
	ZHANG Shuwen3

Cite this article:

ZHANG Jian1,WANG Chuan1,LI Zhaofeng1, et al. Experimental study on the engineering charateristics of red mud-based green high-performance grouting material[J]. , 2022, 41(S2): 3339-3352.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1281 OR http://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS2/3339

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