Chemo-mechanical coupling model of off-shore concrete structures

Marinelle EL KHOURY; Frederic GRONDIN; Emmanuel ROZIERE; Fadi HAGE CHEHADE; Rachid CORTAS

doi:10.26168/ajce.39.1.8

Marinelle EL KHOURY Institut de Recherche en Génie Civil et Mécanique (GeM), UMR 6183, Centrale Nantes – Université de Nantes - CNRS, 1 rue de la Noë 44321 Nantes, France. AND Centre de Modélisation, Ecole Doctorale des Sciences et Technologie, Université Libanaise, Beyrouth, Liban
Frederic GRONDIN Institut de Recherche en Génie Civil et Mécanique (GeM), UMR 6183, Centrale Nantes – Université de Nantes - CNRS, 1 rue de la Noë 44321 Nantes, France.
Emmanuel ROZIERE Institut de Recherche en Génie Civil et Mécanique (GeM), UMR 6183, Centrale Nantes – Université de Nantes - CNRS, 1 rue de la Noë 44321 Nantes, France.
Fadi HAGE CHEHADE Centre de Modélisation, Ecole Doctorale des Sciences et Technologie, Université Libanaise, Beyrouth, Liban.
Rachid CORTAS Centre de Recherches Scientifiques en Ingénierie (CRSI), Université Libanaise, Beyrouth, Liban.

DOI: https://doi.org/10.26168/ajce.39.1.8

Keywords: Micromechanical modeling, degradation, seawater, cement paste

Abstract

Seawater represents a complex phenomenon due to the presence of multiple ions. Previous researches aimed to estimate the resistance losses due to sulphate and chloride attacks based on probabilistic approaches. Few studies have focused on the complex chemo-mechanical modeling by coupling all the ions present in seawater and in concrete. In this study, the model proposed is based on the coupling between two codes CemPP- for the microstructure generation of the cementitious material, the evolution of the hydration and chemical reactions - and Cast3M - for the mechanical calculations and damage modeling. Results highlight the importance of considering each effect of cement paste’s ion reacting with seawater and their role on the overall mechanical behaviour of the structure affected by the chemical phases present at equilibrium.