Article Dans Une Revue European Journal of Environmental and Civil Engineering Année : 2026

Contribution to C-(A)-S-H porosity characterization of slag based cement pastes through a reconstitution of porous structure based on a combination of experimental and modeling approaches: influence of slag substitution rate on their porosity, morphology and pores interconnection

Résumé

This study examines the effects of blast furnace slag (BFS) incorporation on the pore structure of blended cement pastes. Four formulations containing 0%, 30%, 50%, and 80% BFS were investigated at a constant water-to-binder ratio of 0.5. Capillary porosity for each formulation was obtained from a recent hydration model, while intra-hydrate porosity (C-S-H and C-A-S-H) was determined from the difference between total porosity (obtained experimentally) and modeled capillary porosity. The results highlight a clear evolution of intra-hydrate porosity with increasing slag content: porosity within the C-S-H/C-A-S-H gel decreases up to 50% BFS substitution and increases again at 80%. To further interpret these trends and gain insight into hydrate morphology, the partitioning between capillary and intra-hydrate porosity was used as input for an existing pore network model designed to predict water vapor sorption and desorption isotherms, originally validated for OPC-based systems. Simulated isotherms showed good agreement with experimental measurements, and cumulative mercury intrusion curves obtained from MIP tests were also well reproduced by the model. Although additional qualitative investigation is needed to fully clarify the evolution of intra-hydrate porosity, the findings align with broader trends reported in the literature, even if existing studies do not explicitly address this specific aspect.

Fichier sous embargo
Fichier sous embargo
0 5 27
Année Mois Jours
Avant la publication
samedi 21 novembre 2026
Fichier sous embargo
samedi 21 novembre 2026
Connectez-vous pour demander l'accès au fichier

Dates et versions

hal-05605514 , version 1 (21-05-2026)

Licence

Identifiants

Citer

Mohamad Ali Ahmad, Harifidy Ranaivomanana, Stéphanie Bonnet, Paul Buttin, Valerie L’hostis. Contribution to C-(A)-S-H porosity characterization of slag based cement pastes through a reconstitution of porous structure based on a combination of experimental and modeling approaches: influence of slag substitution rate on their porosity, morphology and pores interconnection. European Journal of Environmental and Civil Engineering, 2026, 30 (1), pp.2661732. ⟨10.1080/19648189.2026.2661732⟩. ⟨hal-05605514⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

  • More