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Title: Enhancing the carbonation of MgO cement porous blocks through improved curing conditions
Authors: Unluer, C.
Al-Tabbaa, A.
Keywords: DRNTU::Engineering::Civil engineering::Structures and design
Issue Date: 2014
Source: Unluer, C., & Al-Tabbaa, A. (2014). Enhancing the carbonation of MgO cement porous blocks through improved curing conditions. Cement and concrete research, 59, 55-65.
Series/Report no.: Cement and concrete research
Abstract: The use of reactive magnesia (MgO) as the binder in porous blocks demonstrated significant advantages due to its low production temperatures and ability to carbonate, leading to significant strengths. This paper investigates the enhancement of the carbonation process through different curing conditions: water to cement ratio (0.6–0.9), CO2 concentration (5–20%), curing duration (1–7 days), relative humidity (55–98%), and wet/dry cycling frequency (every 0–3 days), improving the carbonation potential through increased amounts of CO2 absorbed and enhanced mechanical performance. UCS results were supported with SEM, XRD, and HCl acid digestion analyses. The results show that CO2 concentrations as low as 5% can produce the required strengths after only 1 day. Drier mixes perform better in shorter curing durations, whereas larger w/c ratios are needed for continuous carbonation. Mixes subjected to 78% RH outperformed all the others, also highlighting the benefits of incorporating wet/dry cycling to induce carbonation.
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2014.02.005
Rights: © 2014 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Cement and Concrete Research, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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