Experimental Investigation and Modelling of Carbonation Process in Cement Materials
Son Tung Pham*
Identifiers and Pagination:Year: 2013
First Page: 116
Last Page: 126
Publisher Id: TOCIEJ-7-116
Article History:Received Date: 31/3/2018
Revision Received Date: 19/8/2008
Acceptance Date: 12/9/2008
Electronic publication date: 30/9/2013
Collection year: 2013
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Cement mortar and cement paste samples were prepared and subjected to accelerated carbonation test at 20°C, 65% humidity relative, 20% or 50% concentration of CO2. The carbonation depth was determined using classical phenolphthalein test. The mass fractions of Ca(OH)2 and CaCO3 were calculated from thermogravimetric analysis. We studied different factors that influence the carbonation process such as: concentration of CO2, type of material, surface exposure to CO2, porosity accessible to water, duration of carbonation. Based on the experimental results, a numerical simulation was developed to predict the carbonation depth. This physicochemical and deterministic model relies upon a detailed description of the carbonation mechanism as it takes into account the chemical kinetics, the microstructural and hydrous evolutions induced.