This paper presents the results of an interlaboratory study of the rheological properties of cement paste and ultrasound gel as reference substance. The goal was to quantify the comparability and reproducibility of measurements of the Bingham parameters yield stress and plastic viscosity when measured on one specific paste composition and one particular ultrasound gel in different laboratories using different rheometers and measurement geometries. The procedures for both in preparing the cement paste and carrying out the rheological measurements on cement paste and ultrasound gel were carefully defined for all of the study’s participants. Different conversion schemes for comparing the results obtained with the different measurement setups are presented here and critically discussed. The procedure proposed in this paper ensured a reasonable comparability of the results with a coefficient of variation for the yield stress of 27% and for the plastic viscosity of 24%, despite the individual measurement series’ having been performed in different labs with different rheometers and measurement geometries.

中文翻译：

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水泥浆和参考物质流变特性的实验室间研究：使用不同流变仪和测量几何形状进行测量的可比性

本文介绍了水泥浆和超声凝胶作为参考物质的流变特性的实验室间研究结果。目标是在使用不同流变仪和测量几何结构的不同实验室中对一种特定的糊状组合物和一种特定的超声凝胶进行测量时，量化 Bingham 参数屈服应力和塑性粘度的测量结果的可比性和再现性。为所有研究参与者仔细定义了制备水泥浆以及对水泥浆和超声凝胶进行流变测量的程序。此处介绍并批判性地讨论了用于比较使用不同测量设置获得的结果的不同转换方案。