Carbonating magnesia for soil stabilization

Yi, Y., Liska, M., Unluer, C. and Al-Tabbaa, A. (2013) Carbonating magnesia for soil stabilization. Canadian Geotechnical Journal, 50(8), pp. 899-905. (doi: 10.1139/cgj-2012-0364)

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This paper investigates the potential for carbonating reactive magnesia (MgO) to serve as a more sustainable soil stabilization method by providing rapid and significant strength development of the stabilized soil through absorbing substantial quantities of CO2. Gaseous CO2 was forced through laboratory-prepared reactive MgO-treated soil samples in a triaxial cell set-up, and their resulting mechanical and microstructural properties were investigated using unconfined compressive strength, X-ray diffraction, and scanning electron microscopy. The results showed that adequately carbonated MgO-treated soils could, in a few hours, reach a similar strength range to corresponding 28 day Portland cement (PC)-stabilized soils. Hydrated magnesium carbonates, namely nesquehonite and hydromagnesite–dypingite, were the main products of the carbonated MgO in the soil, and were responsible for the significant strength development.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Unluer, Dr Cise
Authors: Yi, Y., Liska, M., Unluer, C., and Al-Tabbaa, A.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Canadian Geotechnical Journal
Publisher:NRC Research Press
ISSN (Online):1208-6010
Published Online:20 June 2013

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