A reaction-diffusion model for the hydration/setting of cement
F. Tzschichholz, H.J. Herrmann, H. Zanni
TL;DR
This paper introduces a reaction-diffusion model that simulates the spatial and temporal evolution of cement hydration and setting, capturing microstructure development based on ion transport and chemical reactions.
Contribution
It presents a novel heterogeneous reaction-diffusion model for cement hydration that accounts for spatial heterogeneity and chemical processes, applicable to water/mineral systems.
Findings
Qualitative reproduction of cement hydration features
Simulation of microstructure evolution from random initial conditions
Model applicability to general water/mineral systems
Abstract
We propose a heterogeneous reaction-diffusion model for the hydration and setting of cement. The model is based on diffusional ion transport and on cement specific chemical dissolution/precipitation reactions under spatial heterogeneous solid/liquid conditions. We simulate the spatial and temporal evolution of precipitated micro structures starting from initial random configurations of anhydrous cement particles. Though the simulations have been performed for two dimensional systems, we are able to reproduce qualitatively basic features of the cement hydration problem. The proposed model is also applicable to general water/mineral systems.
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