ON THE DEVELOPMENT OF A MICROMECHANICS-BASED RELATIONSHIP BETWEEN SALT CRYSTALLIZATION PRESSURE, PORE FILLING, AND DAMAGE IN POROUS BUILDING MATERIALS - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

ON THE DEVELOPMENT OF A MICROMECHANICS-BASED RELATIONSHIP BETWEEN SALT CRYSTALLIZATION PRESSURE, PORE FILLING, AND DAMAGE IN POROUS BUILDING MATERIALS

N. Lo Presti
  • Fonction : Auteur
A.M. D’altri
  • Fonction : Auteur
L. Patruno
  • Fonction : Auteur
G. Castellazzi
  • Fonction : Auteur
T. Chekai
  • Fonction : Auteur
S. de Miranda
  • Fonction : Auteur

Résumé

This contribution investigates the relationship between salt crystallization pressure, pore filling, and damage in porous building materials through a micromechanics-based approach. A 3D finite element (FE) model of a microscale representative volume element (RVE) of the porous material is developed, and several load scenarios are applied to the RVE to correlate salt crystallization pressure, pore filling, and damage in the RVE. The resulting relationships are then condensed into a computationally efficient off-line phenomenological model, calibrated on a large FE-based database, capable of predicting the macroscopic damage in the RVE due to any pseudo-time history of salt crystallization pressure and pore filling. The effectiveness of the phenomenological model is verified by comparing its results with the ones computed through the FE model, for load scenarios not included into the calibration dataset, achieving good agreement of results. Finally, the possibility of using this phenomenological model together with available multiphase models to predict moisture transport, salt crystallization pressure, and damage into porous building materials is discussed.
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Dates et versions

hal-04309030 , version 1 (27-11-2023)

Identifiants

  • HAL Id : hal-04309030 , version 1

Citer

N. Lo Presti, A.M. D’altri, L. Patruno, G. Castellazzi, T. Chekai, et al.. ON THE DEVELOPMENT OF A MICROMECHANICS-BASED RELATIONSHIP BETWEEN SALT CRYSTALLIZATION PRESSURE, PORE FILLING, AND DAMAGE IN POROUS BUILDING MATERIALS. SWBSS ASIA (Salt Weathering of Buildings and Stone Sculptures) 2023, Sep 2023, Nara, Japan. ⟨hal-04309030⟩

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