Skip to Main content Skip to Navigation
Journal articles

Predicting the atmospheric carbonation of cementitious materials using fully coupled two-phase reactive transport modelling

Abstract : The durability assessment of cementitious materials and concrete subjected to atmospheric carbonation of concrete has been an extensive study of research. Experimental studies on the subject show, among other results, that the response depends strongly on the cement composition. This paper focuses on two model materials: an hydrated C3S paste and a low-pH paste, which exhibits a higher tendency to cracking. We show that a fully coupled reactive transport model can reproduce the measured experimental depths of carbonation without a need of fitting parameters. A sensitivity provides insights about the most relevant parameters to accurately model the atmospheric carbonation. Furthermore, results suggest that low-pH cement materials might be inherently less mechanically robust when subjected to atmospheric carbonation, due to a higher C-S-H decalcification rate. This implies that these materials are more likely to develop fractures, which could have implications in the framework of gas or radioactive waste disposal.
Complete list of metadata

https://hal-cea.archives-ouvertes.fr/cea-03293412
Contributor : Stéphane Poyet Connect in order to contact the contributor
Submitted on : Wednesday, July 21, 2021 - 8:48:03 AM
Last modification on : Friday, August 20, 2021 - 3:28:52 AM
Long-term archiving on: : Friday, October 22, 2021 - 6:10:09 PM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2022-07-21

Please log in to resquest access to the document

Identifiers

`

Citation

Nicolas Seigneur, E Kangni-Foli, Vincent Lagneau, A Dauzères, Stéphane Poyet, et al.. Predicting the atmospheric carbonation of cementitious materials using fully coupled two-phase reactive transport modelling. Cement and Concrete Research, Elsevier, 2020, 130, pp.105966. ⟨10.1016/j.cemconres.2019.105966⟩. ⟨cea-03293412⟩

Share

Metrics

Record views

72