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Influence of Thixotropy, Plug Flow, Particle Migration, Shear Rate Range and Large Particles – Part 2

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


...Materials 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 complex- ity of rheological measurements on cement-based materials, several errors can occur that will negatively influence the outcome of the meas- urements. This is the second part of the discussion on seven steps to assure the quality and reliability of rheological measurements. The the geometry of the rheometer and the transformation to shear stress and shear rate values with different rheological models were focused on in the first paper, while 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 are discussed in this second paper. The measurement of thixotropy is also briefly introduced.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 12 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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