Designing model system for low-pH cement carbonation

E. Kangni-Foli (1, 2) , E. L'Hôpital (3) , A. Dauzères (1) , P. Le Bescop (2) , Stéphane Poyet (2) , T. Charpentier (4) , Jb. d'Espinose de Lacaillerie (5)

1 IRSN - Institut de Radioprotection et de Sûreté Nucléaire
2 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)
3 IRSN/PSE-ENV/SEDRE/LETIS - Laboratoire d'étude et de recherche sur les transferts et les interactions dans les sous-sols
4 NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
5 ESPCI Paris - Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris

We formulated model cementitious materials of controlled mineralogy and increasing chemical composition complexity. Those model materials are hardened cement pastes with Ca/Si ratio between 0.80 and 3.0 with a microstructure generated by their hydration. They are part of a study focusing on atmospheric carbonation and its consequences (modifications in mineralogy and microstructure) but this aspect will not be discussed here. We will focus instead on the hardened cement pastes properties such as mineralogical assemblage, chemistry and microstructure.

Keywords: microstructure; mineralogy; model paste

Domains: Nuclear Experiment [nucl-ex]; Nuclear Theory [nucl-th]

E. Kangni-Foli, E. L'Hôpital, A. Dauzères, P. Le Bescop, Stéphane Poyet, et al.. Designing model system for low-pH cement carbonation. NUWCEM 2018 - 3rd International Symposium on Cement-based Materials for Nuclear Wastes, Oct 2018, Avignon, France. ⟨cea-02338743⟩