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Simplified Mathematical Model for Concrete Carbonation

Torres, H. / Correa, E. / Castaño, J. G. / Echeverría, F.

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 $S_{1}$ and $S_{2}$ , were exposed. For $S_{1}$ concrete, the proposed mathematical model is a mass balance among ${CO}_{2}$ , $Ca (OH)_{2}$ , 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, $S_{2}$ concrete did not suffer carbonation. A comparative analysis of behavior of both specimens was made.

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Simplified Mathematical Model for Concrete Carbonation

Torres, H. / Correa, E. / Castaño, J. G. / Echeverría, F.

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 $S_{1}$ and $S_{2}$ , were exposed. For $S_{1}$ concrete, the proposed mathematical model is a mass balance among ${CO}_{2}$ , $Ca (OH)_{2}$ , 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, $S_{2}$ concrete did not suffer carbonation. A comparative analysis of behavior of both specimens was made.

Simplified Mathematical Model for Concrete Carbonation

Torres, H. / Correa, E. / Castaño, J. G. / Echeverría, F.

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 $S_{1}$ and $S_{2}$ , were exposed. For $S_{1}$ concrete, the proposed mathematical model is a mass balance among ${CO}_{2}$ , $Ca (OH)_{2}$ , 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, $S_{2}$ concrete did not suffer carbonation. A comparative analysis of behavior of both specimens was made.

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Title:

Simplified Mathematical Model for Concrete Carbonation

Contributors:

Torres, H. (author) / Correa, E. (author) / Castaño, J. G. (author) / Echeverría, F. (author)

Published in:

Journal of Materials in Civil Engineering ; 29

Publication date:

2017-06-08

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0002001

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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