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Article Dans Une Revue Cement and Concrete Research Année : 2020

Portable quantitative confocal Raman spectroscopy: Non-destructive approach of the carbonation chemistry and kinetics

Résumé

Carbonation is one major alteration process of cementitious materials. It can be monitored through several methods, all destructive. In this study, some preliminary investigations were conducted to monitor the carbonation process of pure portlandite with an in situ and non-destructive spectroscopic method. This complementary approach was motivated by a literature review indicating the benefits of Raman spectroscopy, but requiring innovative approaches for data acquisition and analysis. The material was selected to validate this spectroscopic monitoring, coupled with chemometrics tools to allowing an early detection of the carbonation reaction through a structure identified in the spectra data population. The carbonation occurred abruptly, and spectra analysis indicated the occurrence of phases synonymous of microstructural evolutions. Varying the atmospheric percentage of CO2 (0.04% - 4%) conducted to an appreciation of the kinetics of the carbonation front through the same thickness of portlandite.
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Dates et versions

hal-03004664 , version 1 (13-11-2020)

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Mario Marchetti, Jean-Michel Mechling, Cécile Diliberto, Mohamed-Nadjib Brahim, Romain Trauchessec, et al.. Portable quantitative confocal Raman spectroscopy: Non-destructive approach of the carbonation chemistry and kinetics. Cement and Concrete Research, 2020, 139, 8 p. ⟨10.1016/j.cemconres.2020.106280⟩. ⟨hal-03004664⟩
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