CUED Publications database

Carbonating magnesia for soil stabilization

Yi, Y and Liska, M and Unluer, C and Al-Tabbaa, A (2013) Carbonating magnesia for soil stabilization. Canadian Geotechnical Journal, 50. pp. 899-905. ISSN 0008-3674

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Abstract

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: Article
Uncontrolled Keywords: Carbonation Microstructure Reactive MgO Soil stabilization Unconfined compressive strength
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:28
Last Modified: 08 Dec 2014 02:18
DOI: 10.1139/cgj-2012-0364