Water Retention Behaviour Explored by X-Ray CT Analysis

摘要: This study aims to experimentally characterise the link between partial water saturation and suction in a sand sample at micro scale. The paper presents first results of an experimental which high resolution (7.5μm/px) X-ray tomography has been performed on small (10×10mm) cylindrical Hostun HN31 several different levels imposed suction. A specialised cell allowing scanning as well fine control (imposed both by negative pressure positive air pressure) developed for this is described herein. 3D images resulting from are treated order define each voxel image either air, or grain. From these “trinarised” images, local global values porosity degree then measured. method enables retention behaviour grain scale, all while characterisation whole.