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Amziane S, Ferraris CF, Koehler EP. Measurement of Workability of Fresh Concrete Using a Mixing Truck. J Res Natl Inst Stand Technol. 2005;110(1):55-66doi: 10.6028/jres.110.006.
Amziane, S., Ferraris, C. F., & Koehler, E. P. (2005). Measurement of Workability of Fresh Concrete Using a Mixing Truck. Journal of research of the National Institute of Standards and Technology, 110(1), 55-66. https://doi.org/10.6028/jres.110.006
Amziane, Sofiane, et al. "Measurement of Workability of Fresh Concrete Using a Mixing Truck." Journal of research of the National Institute of Standards and Technology vol. 110,1 (2005): 55-66. doi: https://doi.org/10.6028/jres.110.006
Amziane S, Ferraris CF, Koehler EP. Measurement of Workability of Fresh Concrete Using a Mixing Truck. J Res Natl Inst Stand Technol. 2005 Feb 01;110(1):55-66. doi: 10.6028/jres.110.006. Print 2005. PMID: 27308103; PMCID: PMC4849560.
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J Res Natl Inst Stand Technol. 2005 Feb 01;110(1):55-66. doi: 10.6028/jres.110.006. Print 2005.

Measurement of Workability of Fresh Concrete Using a Mixing Truck.

Journal of research of the National Institute of Standards and Technology

Sofiane Amziane, Chiara F Ferraris, Eric P Koehler

Affiliations

  1. Laboratoire de Génie Mécanique, et Matériaux, Université de, Bretagne Sud, rue St Maudé, BP, 92116-56321 Lorient Cedex-France.
  2. National Institute of Standards and Technology, Gaithersburg, MD 20899-0001, USA.
  3. University of Texas at Austin, Austin, TX, USA.

PMID: 27308103 PMCID: PMC4849560 DOI: 10.6028/jres.110.006

Abstract

The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with different values of yield stress and plastic viscosity were tested in a concrete truck. The measurements made with the truck were based on the typical method of determining the flow behavior in a traditional fluid rheometer; that is, the shear rate in the mixing truck was swept from high to low by varying the rotation speed of the drum. The results of these experiments are discussed and compared with data provided by the ICAR rheometer, a portable rheometer designed for measuring concrete rheology. The test results indicate that the mixing truck equipment is sufficiently sensitive to detect differences in yield stress, slump, and plastic viscosity. However, the plastic viscosity determined by the truck measurement did not correlate with plastic viscosity as measured by the ICAR rheometer, while the yield stress determined by the truck measurement did correlate well with the measured slump and the ICAR rheometer results Suggestions are given on how to improve the mixing truck for better use as a rheometer.

Keywords: concrete; concrete rheometer; mixer truck; rheology

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