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Feasibility of Using a Concrete Mixing Truck as a Rheometer(Orlando, Florida)

Published

Author(s)

Chiara F. Ferraris, Roy Cooley, Joe Grein, Max A. Peltz, Michael Topputo, Steve Verdino

Abstract

The goal of the tests reported here was to further determine the feasibility of using a concrete mixing truck as a rotational rheometer. This work is the continuation of preliminary tests [ , ] that seemed to indicated that the yield stress and the plastic viscosity could be deducted from the measurements of speed and hydraulic pressure performed on a concrete mixing truck. The methodology used is based on using the concrete mixing truck drum rotation rate combined with the measurement of the torque induced by the concrete load. This report summarizes the material and experiments conducted during 3 days in Orlando, Florida in December 2007. The results are presented and discussed. The results of these experiments are discussed and compared with data provided by an IBB rheometer [14].These results confirm the conclusion obtained by Amziane et al. [4] that stated that the concrete mixing truck could be used to determine yield stress and correlates well with the slump cone test. Although the relationship between torque and speed was found to be linear, the slope is not correlated to the plastic viscosity as measured by the rheometer. Suggestions are given on how to improve the concrete mixing truck for use as a rheometer but it is not certain that these would solve the problem. Discussion of these conclusions is offered as well how to improve the system.
Citation
NIST Interagency/Internal Report (NISTIR) - 7447
Report Number
7447

Keywords

concrete mixing truck, rheometer

Citation

Ferraris, C. , Cooley, R. , Grein, J. , Peltz, M. , Topputo, M. and Verdino, S. (2007), Feasibility of Using a Concrete Mixing Truck as a Rheometer(Orlando, Florida), NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860721 (Accessed April 18, 2024)
Created September 19, 2007, Updated July 16, 2018