Magnesium Oxychloride Cement: Development, Opportunities and Challenges

Magnesium oxychloride cement (MOC), an alternative to ordinary Portland cement (OPC), has attracted increasing research interest for its excellent mechanical properties and its green and sustainable attributes. The poor water resistance of MOC limited its usage mainly to indoor applications; neverth...

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Bibliographic Details
Published in:Applied sciences 2024-04, Vol.14 (7), p.3074
Main Authors: Ahmad, Farhan, Rawat, Sanket, Zhang, Yixia
Format: Article
Language:English
Subjects:
Cement
Civil engineering
CO2 curing
Crystals
Curing
Emissions
fiber-reinforced MOC (FRMOC)
green cement
Greenhouse gases
Hydration
magnesium oxychloride cement (MOC)
Materials
Mechanical properties
R&D
Refuse and refuse disposal
Research & development
Silica
Temperature
water resistance
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Summary:Magnesium oxychloride cement (MOC), an alternative to ordinary Portland cement (OPC), has attracted increasing research interest for its excellent mechanical properties and its green and sustainable attributes. The poor water resistance of MOC limited its usage mainly to indoor applications; nevertheless, recent advances in water-resistant MOC have expanded the material’s potential applications from indoor to outdoor. This review aims to showcase recent advances in MOC, including water-resistant MOC and ductile fiber-reinforced MOC (FRMOC), exploring their potential applications including in sustainable construction for future generations. The mechanism under different curing procedures such as normal and CO2 curing and the effect of different inorganic and organic additives on the water resistance of MOC composites are discussed. In particular, the review highlights the recent developments in achieving over 100% strength retention under water at 28 days as well as advancements in FRMOC, where tensile strength has surpassed 10 MPa with a remarkable strain capacity ranging from 4–8%. This paper also sheds light on the potential applications of MOC as a fire-resistant coating material, green-wood-MOC composite building material, and in reducing solid waste industrial byproduct accumulations. Finally, this study suggests future research directions to enhance the practical application of MOC.
ISSN:2076-3417
2076-3417
DOI:10.3390/app14073074