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Seven Steps to Assure the Quality and Reliability of Rheological Measurements on Cement-Based ...

Choice of Rheometer, Equations and Models


… Materials – Part 1 During the last decades, rheology is more and more applied in the investigation and evaluation of cement-based materials. While the impor- tance of rheology has risen considerably, the quality of the rheological measurements must be guaranteed at all times. Due to the complexity of rheological measurements on cement-based materials, several errors can occur that will negatively influence the outcome of the measure- ments. In this paper series, seven steps to assure the quality and reliability of rheological measurements are discussed. This paper focuses on the geometry of the rheometer, the transformation to shear stress and shear rate values with different rheological models and the influ- ence of the choice of the rheological model on the yield stress value. The next article discusses the influence of thixotropy, plug flow and particle migration on the measurements, the choice of shear rate range and the presence of aggregates and fibers. The measurement of thixotropy is also briefly introduced in the next paper.

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Missouri University of Science and Technology
1870 Miner Cir, Rolla, MO 65409, USA

CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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