Abstract Assessment of the so-called “saturated-surface-dried” state shows a strong dependency on the test operator in the case of fine porous aggregates. This leads to low reliability and reproducibility of water absorption measurement for this family of particles. Evaporative methods for water absorption measurements seem to be a promising alternative. In this paper, we aim at evaluating the robustness and the limit of such methods while understanding the general underlying physical processes. We therefore measure the drying kinetics of non-porous and porous, real and model particles with various sizes and morphologies. We study specifically the unexpected effects of angularity and roughness of particles on drying rate changes over time. Our results suggest that this method is not suitable for all porous particles but shall apply well to crushed fine porous particles such as crushed sand and recycled sand.

中文翻译：

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使用蒸发法测量细孔骨料的吸水率：实验结果和物理分析

摘要 在细孔集料的情况下，所谓的“饱和表面干燥”状态的评估表明对测试操作员的强烈依赖。这导致该系列颗粒的吸水率测量的可靠性和再现性较低。用于吸水率测量的蒸发方法似乎是一种很有前途的替代方法。在本文中，我们旨在评估此类方法的稳健性和局限性，同时了解一般的潜在物理过程。因此，我们测量具有各种尺寸和形态的无孔和多孔、真实和模型颗粒的干燥动力学。我们专门研究了颗粒的棱角和粗糙度对干燥速率随时间变化的意外影响。