DataVXEmerging Materials ResearchPaper
journal article·2026-06-10

Freezing-thawing resistance of magnesium oxysulfate (MOS) cement with granite powders

Kairong Jin, Dezhi Wang, Wanli Bi, Xiangming Zhou

Emerging Materials Research
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Source abstract

Abstract

One of low-carbon cementitious material is magnesium oxysulfate (MOS) cement with desirable engineering properties, including exceptional fire resistance, lightweight properties, and low thermal conductivity. To encourage the widespread adoption and utilization of MOS cement in various applications, along with the reuse of solid waste granite powders (GPs), GPs were added to MOS cement as a mineral admixture to improve its freezing-thawing (F-T) resistance. Scanning electron microscope, synchronous thermal analyzer, mercury porosimeter, and X-ray diffractometer were employed to detect the microstructure, hydration products, pore characteristics, and phase composition of MOS cement. The compressive strength loss rate and mass loss rate of MOS cement containing GPs were adopted to evaluate its F-T resistance. The results revealed that MOS cement containing 40 wt.% GPs survived 50% more F-T cycles than the MOS cement without GPs. During the F-T cycles, the 5·1·7 phase grew from needle-like crystals to clusters in MOS cement. The matrix deterioration of MOS cement was facilitated by various factors such as the presence of residual MgO in the matrix results in the creation of Mg(OH)2, the crystallization of pore water, and the decomposing of the 5·1·7 phase. The addition of GPs can improve the packing density and stability of MOS cement matrix, leading to a reduction in the content of air hole of the resulting cement. During the procedure of F-T cycles, a reformation of 5·1·7 phase occurred due to the variation in the pore solution’s pH value in MOS cement, leading to an improvement in the engineering properties.
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Research context

OpenAlex topics: Magnesium Oxide Properties and Applications · Magnesium Alloys: Properties and Applications · Concrete and Cement Materials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Inner Mongolia Agricultural University State Key Laboratory of Water Engineering Ecology and Environment in Arid Area, , Hohhot, PR ; College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, PR China; School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, PR China; Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, PR China; Engineering Technology Research Center of Earthquake Protection and Disaster Mitigation in Civil Engineering in Ningxia, Yinchuan, PR China; Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia, Yinchuan, PR China

Ningxia University School of Civil and Hydraulic Engineering, , Yinchuan, PR ; Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, PR China; Engineering Technology Research Center of Earthquake Protection and Disaster Mitigation in Civil Engineering in Ningxia, Yinchuan, PR China; Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia, Yinchuan, PR China

University of Science and Technology College of Materials and Metallurgy, , Anshan, PR

Brunel University of London Department of Civil & Environmental Engineering, , Uxbridge,

Funding

National Natural Science Foundation of China · Key Research and Development Program of Ningxia Province · Ningxia Youth Talent Support Program · Ningxia First Class Discipline Project

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