Effects of steel slag on the properties and microstructure of magnesium oxysulfate cement prepared by magnesium desulfurization byproducts

Huihui Du; Jiajie Li; Dong Xu; Gang Li; Wen Ni; Xinli Mu; Bateer Sayn; Junxiang Guo; Zhaokun Shi; Mingyuan Gu; Youhao Yin; Zhiqiang Yang; Michael Hitch

Journal of Materials Research and Technology (May 2024)

Effects of steel slag on the properties and microstructure of magnesium oxysulfate cement prepared by magnesium desulfurization byproducts

Huihui Du,
Jiajie Li,
Dong Xu,
Gang Li,
Wen Ni,
Xinli Mu,
Bateer Sayn,
Junxiang Guo,
Zhaokun Shi,
Mingyuan Gu,
Youhao Yin,
Zhiqiang Yang,
Michael Hitch

Affiliations

Huihui Du: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China; School of Civil and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Jiajie Li: School of Civil and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author. School of Civil and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Dong Xu: Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China; Corresponding author. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China.
Gang Li: Shougang Mining Corporation, Tangshan, 063000, China
Wen Ni: School of Civil and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China
Xinli Mu: School of Civil and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China
Bateer Sayn: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Junxiang Guo: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Zhaokun Shi: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Mingyuan Gu: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Youhao Yin: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Zhiqiang Yang: Shougang Group Research Institute of Technology, Beijing, 100043, China; Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing, 100043, China
Michael Hitch: Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, P.O. Box U1987, Perth, WA 6845, Australia; Faculty of Science, University of the Fraser Valley, Abbotsford, BC, V2S 7M8, Canada

Journal volume & issue: Vol. 30
pp. 3200 – 3212

Abstract

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The magnesium oxysulfate (MOS) cement has problems of short setting time, poor water resistance, and volume instability. This paper investigates the potential of steel slag (SS) to modify the properties and microstructure of the MOS cement prepared by magnesium desulfurization byproducts (MDBs). The results showed that SS delayed the setting time, restrained the volume shrinkage, and improved the water resistance of the MOS cement. The hydration products of the MOS cement were the fibrous 318 phase (3 Mg(OH)2•MgSO4•8H2O), lamellar Mg(OH)2, and MgCO3. The addition of SS increased the pH and decreased the overall hydration reaction rate and the amount of Mg(OH)2 in the MOS cement. SS reacted with Mg(OH)2 at the late stage to form an amorphous M–S–H gel, which increased the gel pore volume and the density of the cement. In conclusion, SS enhanced the application potential of MOS cement, through improving its macroscopic properties.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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