Abstract Gauging the mechanical effect of partial saturation in granular materials is experimentally challenging due to the very low suctions resulting from large pores. To this end, a uniaxial (zero radial stress) compression test may be preferable to a triaxial one where confining pressure and membrane effects may erase the contribution of this small suction; however, volume changes are challenging to measure. This work resolves this limitation by using X-ray imaging during in situ uniaxial compression tests on Hamburg Sand and glass beads at three different initial water contents, allowing a suction-dependent dilation to be brought to the light. The acquired tomography volumes also allow the development of air–water and solid–water interfacial areas, water clusters and local strain fields to be measured at the grain scale. These measurements are used to characterise pertinent micro-scale quantities during shearing and to relate them to the measured macroscopic response. The new and well-controlled data acquired during this experimental campaign are hopefully a useful contribution to the modelling efforts—to this end they are shared with the community.

Marius Milatz

Nicole Hüsener

Edward Andò

Gioacchino Viggiani

Jürgen Grabe

Acta Geotechnica

ACTA GEOTECHNICA 是一本国际期刊，致力于出版和传播地球工程的基础和应用研究——一个涉及土壤和岩石等地质材料的跨学科领域。覆盖强调地质力学模型及其工程应用之间的相互作用。该杂志基于实验、分析和/或数值方法，发表关于地质力学基本概念及其在地球工程中的新应用的原创研究论文。该杂志的主要目的是促进对地球材料现象和过程背后的基本机制的理解，从地球科学中发生的千米级问题，到纳米级问题，以及它们对地球工程的潜在影响。该杂志力求及时报告和存档该领域的进展，向编辑展示研究论文、评论文章、简短说明和信件。

Acta Geotechnica is an international journal dedicated to the publication and dissemination of fundamental and applied research in geotechnical engineering, an interdisciplinary field involving geological materials such as soils and rocks. The journal emphasizes the interaction between geomechanical models and their engineering applications. We welcome original research papers based on experimental, analytical, and/or numerical methods that explore fundamental concepts in geomechanics and their new applications in geotechnical engineering. The primary aim of the journal is to enhance the understanding of the fundamental mechanisms behind phenomena and processes related to earth materials, addressing issues ranging from the kilometer scale to the nanoscale, and their potential implications for geotechnical engineering. We strive to report and archive advancements in the field in a timely manner and encourage submissions of research papers, review articles, short notes, and letters.

《Acta Geotechnica》是一本国际期刊，专注于地球工程的基础和应用研究，涵盖土壤、岩石等地质材料的跨学科领域。该期刊强调地质力学模型与其工程应用之间的相互作用。我们欢迎基于实验、分析和/或数值方法的原创研究论文，探讨地质力学基本概念及其在地球工程中的新应用。期刊的主要目的是促进对地球材料现象和过程背后基本机制的理解，涵盖从千米级到纳米级的问题，以及它们对地球工程的潜在影响。我们致力于及时报告和存档该领域的进展，欢迎提交研究论文、评论文章、简短说明和信件。

Category	Quartile
工程技术	1
工程技术, 工程地质	2

Quantitative 3D imaging of partially saturated granular materials under uniaxial compression

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Journal Info

Category	Quartile
ENGINEERING, GEOLOGICAL	1