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Measurements of yield stress and plastic viscosity of cement-based materials via concrete rheometer
Measurements of yield stress and plastic viscosity of cement-based materials via concrete rheometer
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机译:用混凝土流变仪测量水泥基材料的屈服应力和塑性粘度
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摘要
A rheometer can be used to measure yield stress and viscosity of a cement-based material with excellent results. It mainly includes a drum and at least one adaptive vane assembly. The adaptive vane assembly is replaceably connected to a shaft. The shaft rotates relative to the drum. The ratio of radius (r1) of the adaptive vane assembly to radius (r0) of the drum is between 0.1˜0.6. The shaft is rotated with a minimum rotational speed more than 0.001 rad/s, and then can measure its torque at constant speed. Accordingly, the rheometer can greatly reduce the disturbance of vanes of the adaptive vane assembly upon the cement-based materials and reduce the slippage among particles and the vanes. Moreover, the minimum shear stress is defined as a yield stress.
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机译:流变仪可用于测量水泥基材料的屈服应力和粘度,效果极佳。它主要包括一个鼓和至少一个自适应叶片组件。自适应叶片组件可更换地连接至轴。轴相对于滚筒旋转。自适应叶片组件的半径(r 1 Sub>)与滚筒的半径(r 0 Sub>)之比在0.1〜0.6之间。轴以大于0.001 rad / s的最小旋转速度旋转,然后可以以恒定速度测量其扭矩。因此,流变仪可以极大地减少自适应叶片组件的叶片对水泥基材料的干扰,并减少颗粒和叶片之间的滑动。此外,最小剪切应力定义为屈服应力。
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