Simplified Mathematical Model for Concrete Carbonation
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 10
Abstract
A simplified mathematical model for concrete carbonation has been developed and compared with data from accelerated and real exposures. A chamber for an accelerated carbonation test has been built, and the results derived from the test have been used to propose the simplified mathematical model. Two different concrete specimens, denoted and , were exposed. For concrete, the proposed mathematical model is a mass balance among , , and C-S-H and takes into account the change of the porosity with time. Two different simulation software programs were employed to solve the set of differential equations. The model fits well experimental results reported in other works allowing prediction of service life in concrete structures. On the other hand, concrete did not suffer carbonation. A comparative analysis of behavior of both specimens was made.
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Acknowledgments
The authors are grateful to Departamento Administrativo de Ciencia, Tecnología e Innovación COLCIENCIAS and Universidad de Antioquia for financial assistance (projects 110242520643 and 463-2008). This work has been partially funded by “Patrimonio Autónomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación, Francisco José de Caldas y el Servicio Nacional de Aprendizaje SENA.”
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 11, 2016
Accepted: Mar 8, 2017
Published online: Jun 8, 2017
Published in print: Oct 1, 2017
Discussion open until: Nov 8, 2017
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