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.
Relating Fresh Concrete Viscosity Measurements From Different Rheometers
Published
Author(s)
Chiara F. Ferraris, Nicos Martys
Abstract
The rheological properties of concrete need to be measured and predicted to enable the characterization of special concrete such as self-consolidating concrete (SCC). It was also shown by a round-robin held in 2000 [ , ] that different rheometers give a different values of viscosities for the same concrete. Therefore, the rheological properties of a concrete cannot be easily compared using different instruments. To remedy this situation, a new interpretation of the data was developed. It will be shown that all instruments tested could be compared by using a relative viscosity instead of the plastic viscosity. This will allow the indirect calibration of all rheometers.
Ferraris, C.
and Martys, N.
(2003),
Relating Fresh Concrete Viscosity Measurements From Different Rheometers, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/jres.108.021
(Accessed October 14, 2025)