Comparison between natural and accelerated carbonation (3% CO 2 ): Impact on mineralogy, microstructure, water retention and cracking - Archive ouverte HAL Access content directly
Journal Articles Cement and Concrete Research Year : 2018

Comparison between natural and accelerated carbonation (3% CO 2 ): Impact on mineralogy, microstructure, water retention and cracking

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Abstract

The consequences of accelerated carbonation at 3% CO2 were compared with those of natural carbonation (0.04%). Cement pastes (CEM I and CEM V/A) as well as the three major constitutive phases (C-S-H of different C/S ratios, portlandite and ettringite) were used and changes in the mineralogy, microstructure, water retention and cracking were investigated. The main conclusion was that accelerated carbonation at 3% CO2 was representative of natural carbonation although it promoted the precipitation of metastable calcium carbonate (aragonite and vaterite) in place of calcite. The results also showed that the presence of aragonite and vaterite were characteristic of the carbonation of ettringite and C-S-H respectively.
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cea-01771687 , version 1 (19-04-2018)

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Martin Auroy, Stéphane Poyet, Patrick Le Bescop, Jean-Michel Torrenti, Thibault Charpentier, et al.. Comparison between natural and accelerated carbonation (3% CO 2 ): Impact on mineralogy, microstructure, water retention and cracking. Cement and Concrete Research, 2018, 109, pp.64 - 80. ⟨10.1016/j.cemconres.2018.04.012⟩. ⟨cea-01771687⟩
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