Improving the performance of reactive MgO cement-based concrete mixes

Dung, N.T. and Unluer, C. (2016) Improving the performance of reactive MgO cement-based concrete mixes. Construction and Building Materials, 126, pp. 747-758. (doi: 10.1016/j.conbuildmat.2016.09.090)

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Low hydration and high water demand of MgO limits strength gain in MgO cement-based formulations. This study enhanced the microstructure and performance of MgO concrete mixes by increasing hydration and lowering water demand via the introduction of hydration (HA) and dispersion (DA) agents. Hydration and carbonation mechanisms were evaluated by isothermal calorimetry, TGA, XRD, FTIR and SEM. HA increased MgO dissolution and brucite precipitation. DA reduced water content and resulted in denser microstructures by increasing CO2 diffusion. Formation of dense carbonate networks with improved morphologies resulted in 28-day strengths of 45 MPa, which were >50% higher than the control sample.

Item Type:Articles
Additional Information:The authors would like to acknowledge the financial support from the Singapore MOE Academic Research Fund Tier 1 (RG 113/14) for the completion of this research project.
Glasgow Author(s) Enlighten ID:Unluer, Dr Cise
Authors: Dung, N.T., and Unluer, C.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Construction and Building Materials
ISSN (Online):1879-1786
Published Online:13 October 2016

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