Evolution of Microstructural Characteristics of Different Cement Materials Caused by Carbonation

Abstract:

The objective of this work was to examine the influence of carbonation on the microstructure of cement materials. Different materials, which were CEM I mortar and paste, CEM II mortar and paste, were carbonated at 20°C, 65% relative humidity and 20% of CO₂ concentration. The specific surface area and pore size distribution were determined from the method of nitrogen adsorption. The results showed that the materials based on CEM II seemed to be more sensible to a creation of mesoporosity after carbonation than the CEM I based materials. The results of this study also helped to explain why observations in the literature diverge greatly on the influence of carbonation on specific surface area.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 628-632
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.628
• Online since: May 2014
• Authors: Son Tung Pham*, William Prince
• Keywords: Carbonation, Nitrogen Adsorption, Pore Size Distribution, Specific Surface Area

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