NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
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.
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 October 11, 2025)