Technical Papers
Nov 19, 2021

Effect of Molar Ratios and Curing Conditions on the Moisture Resistance of Magnesium Oxychloride Cement

Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 2

Abstract

Magnesium oxychloride cement (MOC) is a promising binder with many advantageous properties over traditional binders. Its main downfall, restricting large-scale use, is its inherent susceptibility to moisture. However, in recent years, niche applications have developed where MOC has been deployed successfully. These include lightweight wall panels, floor tiles, and decorative panels. This paper investigates the effect of molar ratios (MgO/MgCl2 and H2O/MgCl2) and curing conditions on MOC. Findings illustrate that the use of appropriate molar ratios and the implementation of a suitable curing regime can significantly improve the moisture resistance of MOC. After 28 days of immersion in water, the MOC samples lost between 40% and 90% of their strength depending on the molar ratio, demonstrating the importance of correct proportioning. It was also found that curing MOC at temperatures between 20°C and 50°C provides the most stable MOC in humid conditions. These findings add to the current knowledge available on MOC. They will help end users to improve the performance of MOC in its current applications and work toward broadening the range of applications where MOC can be used successfully.

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Data Availability Statement

All data, models, and code generated or used during the study appear in the published article.

Acknowledgments

The authors appreciate the financial support received from Knowledge Transfer Partnership project (KTP11169) with Resistant Building Products, which is partly funded by Innovate UK (No. 511330) and Invest NI.

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Go to Journal of Materials in Civil Engineering
Journal of Materials in Civil Engineering
Volume 34Issue 2February 2022

History

Received: Jan 26, 2021
Accepted: Jun 8, 2021
Published online: Nov 19, 2021
Published in print: Feb 1, 2022
Discussion open until: Apr 19, 2022

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Authors

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Timothy A. Aiken [email protected]
Postdoctoral Researcher, School of Natural and Built Environment, Queen’s Univ. Belfast, Stranmillis Rd., Belfast BT9 5AG, UK (corresponding author). Email: [email protected]
Mark Russell
Research Technician, School of Natural and Built Environment, Queen’s Univ. Belfast, Stranmillis Rd., Belfast BT9 5AG, UK.
Daniel McPolin
Senior Lecturer, School of Natural and Built Environment, Queen’s Univ. Belfast, Stranmillis Rd., Belfast BT9 5AG, UK.
Brian Gavin
Civil Engineer, School of Natural and Built Environment, Queen’s Univ. Belfast, Stranmillis Rd., Belfast, BT9 5AG, UK.
Liam Nugent
Civil Engineer, School of Natural and Built Environment, Queen’s Univ. Belfast, Stranmillis Rd., Belfast, BT9 5AG, UK.
Leo Bagnall
Managing Director, Resistant Building Products, 7 Duncrue Pl., Belfast BT3 9BU, Northern Ireland.

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