Elucidating the Effect of Water-To-Cement Ratio on the Hydration Mechanisms of Cement.

ABSTRACT: The hydration of cement is often modeled as a phase boundary nucleation and growth (pBNG) process. Classical pBNG models, based on the use of isotropic and constant growth rate of the main hydrate, that is, calcium-silicate-hydrate (C-S-H), are unable to explain the lack of any significant effect of the water-to-cement (w/c) ratio on the hydration kinetics of cement. This paper presents a modified form of the pBNG model, in which the anisotropic growth of C-S-H is allowed to vary in relation to the nonlinear evolution of its supersaturation in solution. Results show that once the supercritical C-S-H nuclei form, their growth remains confined within a region in proximity to the cement particles. This is hypothesized to be a manifestation of the sedimentation of cement particle

SUBMITTER: Ley-Hernandez AM 

PROVIDER: S-EPMC6641762 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature