导水率
岩土工程
体积热力学
碎石
粒子(生态学)
收缩(语法)
材料科学
地质学
土壤科学
土壤水分
物理
医学
海洋学
量子力学
内科学
作者
Carlos D. Rodriguez-Hernandez,Junghee Park,Heriberto Echezuría,J. Carlos Santamarina
出处
期刊:Journal of Geotechnical and Geoenvironmental Engineering
[American Society of Civil Engineers]
日期:2024-06-01
卷期号:150 (6)
标识
DOI:10.1061/jggefk.gteng-12234
摘要
Particle crushing takes place in a wide range of engineering applications and affects fluid flow through granular materials. This study examines volumetric changes and the evolution of hydraulic conductivity during particle crushing using a combination of high-stress experiments, data compilation from published studies and particle-scale numerical simulations. An asymptotically correct hyperbolic model fits void ratio versus stress data and provides reliable estimates of the yield stress. Alternatively, hydraulic conductivity follows a power law with void ratio and the trend extends into the grain crushing regime. Hydraulic conductivity diminishes rapidly as sand grains start crushing; the reduction in hydraulic conductivity can reach 1-to-4 orders of magnitude depending on mineral composition, particle shape and initial packing density. Crushing involves the progressive detachment of small fragments; these small particles move into the larger pores, increase the drag resistance, clog pore constrictions, and effectively hinder fluid flow after the yield stress.
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