Comparison between natural and accelerated carbonation (3% CO2): Impact on mineralogy, microstructure, water retention and cracking

By M. Auroy, S. Poyet, P. Le Bescop, J. Torrenti, Thibault Charpentier, M. Moskura, X. Bourbon. Cement and Concrete Research, 2018

255 citations recorded by the source corpus.

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.

Subfields: Civil and Structural Engineering, Environmental Engineering

View Paper: https://www.semanticscholar.org/paper/dd7adbd44bf9590f454711cb399d4ce090834f1b

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In Civil and Structural Engineering

1. J. Provis
2. S. A. Bernal
3. B. Lothenbach
4. M. Zając
5. A. Vollpracht
6. Karen L. Scrivener
7. Zhenguo Shi
8. Ö. Cizer

In Environmental Engineering

1. M. Zając
2. J. Provis
3. S. A. Bernal
4. Karen L. Scrivener
5. B. Lothenbach
6. A. Vollpracht
7. N. De Belie
8. F. Winnefeld

Citations in the corpus

• Understanding the carbonation of concrete with supplementary cementitious materials: a critical review by RILEM TC 281-CCC (2020, background): “For BFS-containing binders a decrease in gel porosity but an increase in capillary pores (coarsening of the pore structure) has been reported in [26, 83, 182].”