Granular media with a small amount of liquid possess a significant stiffness caused by interactions or capillary bridges compared to the same system when dry. Recently, another type of interacting sand where each grain is coated by silicone-oil is produced. However, macroscopic physical properties of such systems are not yet understood. In this work, we mixed the silicone-coated sand to uncoated one, and examined the static properties of the interacting composite granular system with three independent experiments. We then observed a characteristic transition of macroscopic behaviors by changing the fraction of coated sand. This work can advance our fundamental understandings of interacting granular systems.

中文翻译：

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有机硅砂混合物的过渡行为

与干燥时的同一系统相比，含有少量液体的颗粒介质具有很大的硬度，这是由相互作用或毛细管桥引起的。最近，产生了另一种类型的相互作用砂，其中每个颗粒都被硅油覆盖。但是，这种系统的宏观物理性质尚未被理解。在这项工作中，我们将有机硅涂层的沙子混合成未涂层的沙子，并通过三个独立的实验检查了相互作用的复合颗粒体系的静态性能。然后，我们通过改变涂层砂的比例来观察宏观行为的特征转变。这项工作可以增进我们对交互粒度系统的基本理解。