Effect of carbonation on the hydro-mechanical properties of Portland cements - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Cement and Concrete Research Year : 2009

Effect of carbonation on the hydro-mechanical properties of Portland cements

Abstract

We evaluate experimentally the effect of carbonation on the hydro-mechanical properties of Portland cement. Samples were carbonated at 90 °C and 28 MPa under wet supercritical CO2. Two types of carbonation features were achieved, either the samples were homogeneously carbonated or they displayed sharp carbonation fronts. Using a tri-axial apparatus, the static elastic moduli and the mechanical strength were measured at in-situ pressure conditions (28 MPa) and showed a degradation of the mechanical properties of the samples where a carbonation front prevailed. Water and gas permeabilities were measured and showed that the samples with a carbonation front exhibit a stress sensitive permeability. P and S elastic wave velocities were measured to evaluate dynamic (ultrasonic range, 1 MHz) elastic moduli. The use of an effective medium theory approach enabled us to characterize the density and distribution of cracks within the samples. This approach outlines that the samples which developed a carbonation front were damaged.

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Materials
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Dates and versions

hal-00586211 , version 1 (15-04-2011)

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Antonin Fabbri, Jérôme Corvisier, Alexandre Schubnel, Fabrice Brunet, Bruno Goffé, et al.. Effect of carbonation on the hydro-mechanical properties of Portland cements. Cement and Concrete Research, 2009, 39 (12), pp.1156-1163. ⟨10.1016/j.cemconres.2009.07.028⟩. ⟨hal-00586211⟩
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