基于CO<sub>2</sub>驱动固结的镁渣基3D打印材料的制备与性能研究

doi:10.11896/cldb.22050050

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Abstract Magnesium slag is an industrial solid waste containing a large amount of dicalcium silicate with poor hydration activity and good carbonation activity. A preparation method of magnesium slag-based 3D printing material is proposed. The method uses magnesium slag with high carbonation activity as the main cementitious component, and silica fume, water and superplasticizer are added to prepare printable paste with adjustable rheology. After printing, 3D printing samples with excellent mechanical strength can be obtained in a short time through pre-drying and CO₂ curing. The influence of carbonation curing conditions on the mechanical properties and microstructure of printed samples was investigated. Results show that, a proper pre-drying is beneficial to the carbonation strength. After pre-drying to 0.05 water to solid ratio before carbonation curing, then CO₂ curing for 3h at 0.3 MPa, the compressive strength of the printed sample reaches 48.8 MPa; the densification of microstructure and the formation of calcite are the main reasons for the rapid strength gain of printed sample after CO₂ curing.

Key words： magnesium slag 3D printing carbonation compressive strength rheological property

Published: 10 October 2023 Online: 2023-09-28

CLC number:

TU528

Fund:National Natural Science Foundation of China (U2001227).

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	Articles by authors
	HUANG Shuai
	ZHANG Wenqin
	LIU Zhichao
	WANG Fazhou

Cite this article:

HUANG Shuai,ZHANG Wenqin,LIU Zhichao, et al. Preparation and Properties of CO₂ Driven Magnesium Slag-based 3D Printing Materials[J]. Materials Reports, 2023, 37(19): 22050050-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22050050 OR http://www.mater-rep.com/EN/Y2023/V37/I19/22050050

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