This paper introduces three major recommendations for the assessment of the maximum packing fraction of mineral powders through compressive rheology. First, our results show that a minimum compressive stress is required for the measured solid volume fraction to tend towards a constant jamming fraction. Second, we show that the modification of the particles surface properties, especially their friction coefficient, by polymer adsorption, allows for this jamming fraction to get closer to the particle maximum packing fraction. Finally, we show that a minimal value of the initial solid volume fraction of a sample is necessary to prevent particle size separation during testing. We moreover show that the measured jamming fraction depends on the initial solid volume fraction of cement-based samples. We suggest that such a peculiar behavior finds its origin in the dependency of early hydrates volume or morphology on the initial supersaturation.

中文翻译：

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水泥和替代粉末的堆积性能评估：人工制品和协议


本文介绍了通过压缩流变学评估矿物粉末最大堆积分数的三个主要建议。首先，我们的结果表明，测量的固体体积分数需要最小的压应力才能趋向于恒定的干扰分数。其次，我们表明，聚合物吸附对颗粒表面特性的改变，尤其是它们的摩擦系数，使该堵塞分数更接近颗粒的最大堆积分数。最后，我们表明样品的初始固体体积分数的最小值对于防止测试过程中的粒度分离是必要的。我们还表明，测得的堵塞分数取决于水泥基样品的初始固体体积分数。我们认为，这种奇特的行为起源于早期水合物体积或形态对初始过饱和度的依赖性。