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Concrete mixing truck as a rheometer

Concrete mixing truck as a rheometer


Title: Concrete mixing truck as a rheometer
Author: Wallevik, Jon Elvar
Wallevik, Olafur Haralds
Date: 2020-01
Language: English
Scope: 105930
University/Institute: Háskólinn í Reykjavík
Reykjavik University
School: Tæknisvið (HR)
School of Technology (RU)
Department: Verkfræðideild (HR)
Department of Engineering (RU)
ISSN: 0008-8846
1873-3948 (eISSN)
DOI: 10.1016/j.cemconres.2019.105930
Subject: General Materials Science; Building and Construction; Truck mixer; Rheology; Bingham model; Fresh concrete; CFD; Computational Fluid Dynamics; Byggingarverkfræði; Efnisfræði; Steinsteypa; Hermilíkön; Straumfræði
URI: https://hdl.handle.net/20.500.11815/2172

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Citation:

Wallevik, J. E., & Wallevik, O. H. (2020). Concrete mixing truck as a rheometer. Cement and Concrete Research, 127, 105930. https://doi.org/10.1016/j.cemconres.2019.105930

Abstract:

An increasing interest has emerged in correlating the output of the concrete mixing truck to values obtained by rotational rheometers. The output of the former has usually been the hydraulic pressure needed to turn the drum. In such research, experimental errors can be higher than usual, which makes it harder to obtain confident relationships. To better understand the physical characteristics of the truck's Theological values, the above analysis is made by a series of computer simulations (i.e. with CFD). From this, it is evident that the slope H of the truck's pressure values depends both on the plastic viscosity mu as well as on the yield stress tau(0). However, for the intercept G of the truck's values, it is mostly dependent on the yield stress tau(0). In addition to this, both values H and G depend on volume of concrete in the truck as well as on density.

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/)

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