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Rheological Properties of Building Gypsum Fresh Pastes

机译：建筑石膏鲜糊的流变特性

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The study presents results of laboratory tests of rheological properties of fresh pastes made of building gypsum at a wide range of water-gypsum ratios W/G = 0.4-1.5. The tests were carried out in a rotary-type viscosimeter RHEOTEST-2. The rheo-grams characterize dynamic changes in shearing stress τ of the gypsum pastes in the course of setting. By the addition of setting retarders rheostable gypsum pastes were obtained for the period of the experiments, which enabled the taking of rheo-grams of the shearing stress τ, described by analytical functions based on Bingham's and Herschel-Bulkley's plastic bodies. There were determined relations between the yield stress τ_0 as well as plastic viscosity η_(pl) and the W/G ratios. The results have considerable heuristic and practical values for rheology of fresh gypsum pastes.
机译：这项研究提出了在水石膏比W / G = 0.4-1.5的宽范围内，由建筑石膏制成的新鲜糊料流变性能的实验室测试结果。在旋转型粘度计RHEOTEST-2中进行测试。流变图表征了石膏糊在凝固过程中的剪切应力τ的动态变化。通过添加定型阻滞剂，在实验期间获得了流变稳定的石膏糊，这使得能够获取剪切应力τ的流变图，并通过基于宾厄姆和赫歇尔·布克利的塑性体的分析函数进行了描述。确定了屈服应力τ_0以及塑性粘度η_（pl）与W / G比之间的关系。结果对新鲜石膏糊的流变学具有相当大的启发性和实用价值。

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