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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摘要为促进岩土工程绿色发展，提高固废资源化利用效率，基于协同互补理念，利用赤泥、高炉矿渣、钢渣、脱硫石膏4种工业固废制备新型绿色高性能赤泥基注浆材料。通过力学强度测试、X射线衍射分析、红外光谱分析等方式探究赤泥掺量和水灰比对新型赤泥基注浆材料流变性能、凝结时间、力学强度等主要工程性能的作用规律；基于浆体流变动力学揭示赤泥基浆液的水化动力学特征；确定赤泥基浆材结石体中重金属组分的浸出特性及固化方式；通过注浆加固模拟试验，揭示新型浆液对软土地层的注浆加固机制，明晰赤泥基注浆材料浆–土微观胶结特征。研究结果表明：赤泥基注浆材料性能可媲美硅酸盐水泥浆液，赤泥具有形态效应和水化特性，对浆体泵送性能具有提升作用，但其胶凝活性较低，随其掺量的增加，结石体力学强度呈下降的趋势。综合考虑各工作性能，赤泥掺量为40%～60%，水灰比为0.8～0.9时，赤泥基浆液工作性能最优；重金属分析结果表明赤泥基结石体中各类重金属浸出量均小于0.2 ppm，对地质环境具有绿色环保特性。注浆模拟试验表明，赤泥基注浆材料在软土地层中以挤密–劈裂扩散为主，并可有效提升软土地层的抗压强度，提升幅度可达47.6%，具有显著的性能优势与较好的工程适用性。研究成果可为地下工程建设提供绿色高性能低成本的注浆材料，同时还将为赤泥等固废的资源化利用提供思路。

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	张健1
	王川1
	李召峰1
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	高益凡1
	张树文3

关键词 ：建筑材料, 注浆材料, 赤泥基浆液, 工作性能, 流变特性, 绿色环保, 加固模式

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

引用本文:

张健1，王川1，李召峰1，2，高益凡1，张树文3. 赤泥基绿色高性能注浆材料工程特性试验研究[J]. 岩石力学与工程学报, 2022, 41(S2): 3339-3352.
ZHANG Jian1，WANG Chuan1，LI Zhaofeng1，2，GAO Yifan1，ZHANG Shuwen3. Experimental study on the engineering charateristics of red mud-based green high-performance grouting material. , 2022, 41(S2): 3339-3352.

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

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