煤气化渣基流态固化土的制备、性能及水化机理

doi:10.11896/cldb.25020118

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Abstract To address the significant issue of solid waste stockpiles between coal chemical and metallurgical industries in China, a curing agent was prepared by using coal gasification slag (CGS), flue gas desulfurization residue, slag, and cement as raw materials. This curing agent, instead of pure cement mixed with clay, was used to produce fluid solidifying soil. The grinding characteristics of CGS, the properties of fluid solidifying soil and the hydration mechanism of the curing agent were investigated by using particle size analysis, mechanical property tests, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results showed that the specific surface area of CGS milled for 50 minutes reached 560 m²/kg and its 28-day activity index reached 65.9%. When the mass ratio of curing agent in CGS,slag,flue gas desulfurization residue,cement was 30∶30∶12∶28, the mass ratio of curing agent, clay was 12∶88, the slurry concentration was 80%, and the dosage of PC polycarboxylate superplasticizer was 1.1%, the 3 day and 28 day compressive strength of the fluid solidifying soil reached 1.64 MPa and 2.31 MPa, respectively; the main hydration products of the curing agent are C-S-H gel, Ca(OH)₂, and ettringite (AFt).

Key words： coal gasification slag (CGS) grinding characteristics curing agent fluid solidifying soil hydration mechanism

Published: Online: 2026-02-13

CLC number:

TU528

Corresponding Authors: Zhaiyuxin.ztjs@crcc.cn;baistuwong@139.com

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	LI Dongping
	JIAO Yuanshuo
	ZHANG Kaifan
	ZHAI Yuxin
	QIAN Zengzhi
	WANG Changlong
	HUANG Tianyong
	ZHENG Yongchao
	BAI Yunyi
	FU Xingshuai
	TIAN Jinglei
	SUN Yujia

Cite this article:

LI Dongping,JIAO Yuanshuo,ZHANG Kaifan, et al. Fabrication,Properties and Hydration Mechanism of Fluid Solidifying Soil Containing Coal Gasification Slag[J]. Materials Reports, 2026, 40(3): 25020118-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25020118 OR https://www.mater-rep.com/EN/Y2026/V40/I3/25020118

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