Simulating evolution in cement microstructure during chemical degradation

Ravi Patel, Janez Perko, Diederik Jacques, Geert De Schutter, Klaas Van Breugel, Guang Ye

    Research outputpeer-review


    Calcium leaching is one of the important degradation mechanisms causing dissolution of the crystalline phases such as, AFm, portlandite increasing capillary porosity. Further it leads to decalcification of an amorphous C-S-H phase causing increase in the gel porosity and in turn degrading the long term performance of concrete structures. In this paper a lattice Boltzmann based pore-scale reactive transport approach in the context of simulating the evolution of microstructure of a hardened cement paste during calcium leaching is presented. This approach is based on fundamental principles of chemical thermodynamics and mass transport. The example presented illustrates influence of location of mineral grains and surface area on overall dissolution rate and pore structure evolution.
    Original languageEnglish
    Title of host publicationProceedings of The 10th fib International PhD Symposium in Civil Engineering
    Place of PublicationCanada
    StatePublished - Jul 2014
    Event10th fib International PhD Symposium in Civil Engineering - Université Laval, Québec
    Duration: 21 Jul 201423 Jul 2014


    Conference10th fib International PhD Symposium in Civil Engineering

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