engleski

Morphological nature of diffusion in cement paste

The diffusive transport in cement based materials plays a crucial role in the degradation process of concrete. Rapid development of numerical models has provided novel methods to investigate the influence of microstructure on the evolution of the properties of cement based materials. A virtual 3D porous microstructure created with available hydration models provides a fundamental basis for the analysis of the morphological influence onto the effective diffusion coefficient. Such an approach contributes to a better understanding of the phenomenology and thus improves the predicting reliability of the coupled transport models. This paper investigates the influence of the morphological effect onto the diffusion properties of hydrating cement pastes using the cement hydration and microstructure development model HYMOSTRUC3D. The diffusive properties of the simulated microstructures are analyzed employing a numerical 3D transport model. The modeling results are compared with available literature results.

cementitious materials; porous media; microstructure; transport properties; effective diffusion coefficient; 3D modeling

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