3D Computational Simulation of Calcium Leaching in Cement Matrices

  1. Gaitero Redondo, Juan José
  2. Dolado, J.S.
  3. Neuen, C.
  4. Heber, F.
  5. Koenders, E. A.B.
Revista:
Materiales de construcción

ISSN: 0465-2746

Año de publicación: 2014

Volumen: 64

Número: 316

Tipo: Artículo

DOI: 10.3989/MC.2014.08813 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Materiales de construcción

Resumen

Calcium leaching is a degradation process consisting in progressive dissolution of the cement paste by migration of calcium atoms to the aggressive solution. It is therefore, a complex phenomenon involving several phases and dissolution and diffusion processes simultaneously. Along this work, a new computational scheme for the simulation of the degradation process in three dimensions was developed and tested. The toolkit was used to simulate accelerated calcium leaching by a 6M ammonium nitrate solution in cement matrices. The obtained outputs were the three dimensional representation of the matrix and the physicochemical properties of individual phases as a consequence of the degradation process. This not only makes it possible to study the evolution of such properties as a function of time but also as a function of the position within the matrix. The obtained results are in good agreement with experimental values of the elastic modulus in degraded and undegraded samples.

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