3D Multi-scale Modelling of Mechanical Behaviour of Sound and Leached Mortar

A 3-D multi-scale modeling of mechanical properties of cement-based materials approach is presented. The proposed approach provides a quantitative means to estimate and predict the mechanical properties of cement-based materials taking into account the eventual changes in the microstructure. Two numerical tools are combined. First, the NIST's 3-D model (CEMHYD3D) is used to generate a realistic 3-D Representative Volume Element of cement-based materials at different scales. Next, multi-scale simulations are performed by using the FE software Abaqus for calculation of the mechanical behavior. The approach is successfully applied to a specific mortar to determine its mechanical behavior under tensile and compression loadings and the evolution of its Young's modulus under the leaching phenomenon. This evolution is a key parameter as the leaching may be critical for the mechanical integrity of concrete structures such as radioactive waste storage systems in which cement-based materials may be largely used. Numerical results of the modeling are consistent with experimental ones.

Language

  • English

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  • Accession Number: 01099417
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 5 2008 12:13PM