Magnesium-based cements for CO2 capture and utilisation

Jennie Morrison*, Guillaume Jauffret, Jose Luis Galvez-Martos, Fredrik P. Glasser

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Magnesium from reject desalination brine is reacted at atmospheric pressure and 25-65 degrees C with CO2 from industrial effluent combustion gas, precipitating preferably nesquehonite, MgCO3 center dot 3H(2)O. Nesquehonite can be thermally activated so that, when remixed with water, it is self-cementing. At ambient temperature, cure durations are typically similar to 1-3 days. The nesquehonite-based product contains similar to 32 wt sequestered carbon dioxide and, at end of use, can be recycled without loss of CO2. As an application example, cast nesquehonite products are suitable to form lightweight, incombustible building materials with densities in the range 700-900 kg/m(3). Compressive strengths of the cast products are low, ca 2-4 MPa, thus application is envisaged to be broadly similar to that of gypsum-based products. (C) 2016 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)183-191
Number of pages9
JournalCement and Concrete Research
Volume85
Early online date9 May 2016
DOIs
Publication statusPublished - Jul 2016

Keywords

  • Thermal treatment
  • Microstructure
  • Physical properties
  • Cement manufacture
  • Carbon utilisation in nesquehonite
  • Carbon-dioxide sequestration
  • Thermal-decomposition
  • system
  • nesquehonite
  • temperatures

Cite this

Morrison, J., Jauffret, G., Galvez-Martos, J. L., & Glasser, F. P. (2016). Magnesium-based cements for CO2 capture and utilisation. Cement and Concrete Research, 85, 183-191. https://doi.org/10.1016/j.cemconres.2015.12.016