Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Influence of Water-to-Cement Ratio on Hydration Kinetics: Simple Models Based on Spatial Considerations

Published

Author(s)

Dale P. Bentz

Abstract

sed on simple spatial considerations, models to describe the hydration kinetics of portland cement are developed and compared to existing experimental data, particularly in terms of the influence of the starting water-to-cement ratio (w/c) on hydration rates. The conceptual basis for the models is to relate the instantaneous hydration rate to local probabilities for the dissolution and precipitation of the cement phases. In the simplest model, hydration kinetics are strictly a function of local (global) water-filled porosity, as computed based on Power s model for cement hydration. While this simplest model is inadequate to quantitatively describe the observed hydration behavior in real cement pastes with various w/c, a more complicated version of the model that considers both the water-filled porosity and the unhydrated cement volume fractions appears to provide an adequate description. Finally, the models are extended to consider the influence of the replacement of a portion of the cement by an inert filler on the resulting hydration kinetics.
Citation
Cement and Concrete Research
Volume
36
Issue
No. 2

Keywords

filler, hydration, kinetics, modeling

Citation

Bentz, D. (2006), Influence of Water-to-Cement Ratio on Hydration Kinetics: Simple Models Based on Spatial Considerations, Cement and Concrete Research, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860579 (Accessed June 24, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created February 1, 2006, Updated February 19, 2017