Initial steps toward characterizing particle mobilization using pore-scale particle mobilization imaging experiments

Benjamin T. Adams, Ming Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents the preliminary results of an experimental study focused on investigating the fundamental mechanisms of particle-fluid interactions during soil erosion. Historically, researchers have focused primarily on how various soil properties (grain-size distribution, composition, plasticity) affect water-induced erosion. However, recent investigations suggested it is also important to consider permeating fluids other than pure water and how certain physicochemical properties of these fluids (pH, ionic strength, viscosity, composition and concentration of suspended solids) influence soil erosion behavior. The precise mechanisms of particle-fluid interactions and the role of these mechanisms in governing particle mobilization are not currently understood. In this study, pore-scale particle mobilization imaging experiments were utilized in an attempt to preliminarily characterize the mobilization process in terms of the hydraulic shear stress acting on individual particles. Tests were performed on ASTM 20-30 silica sand specimens formed within a custom-fabricated, acrylic, horizontally oriented flow cell that allowed for visual observation of the specimen. The particle mobilization process was captured using a high-definition CMOS camera and imaging system capable of acquiring clear images of individual particles at several hundred frames per second. To specifically focus on the capabilities of the test setup and avoid the inevitable complications associated with testing multiple permeating fluids, only distilled water was used as a permeating fluid. Preliminary results confirm the system's potential to characterize particle behaviors during mobilization.

Original languageEnglish (US)
Title of host publicationIFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
EditorsJ. Brian Anderson, Magued Iskander, Muhannad T. Suleiman, Debra F. Laefer
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2544-2553
Number of pages10
ISBN (Electronic)9780784479087
DOIs
StatePublished - Jan 1 2015
EventInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015 - San Antonio, United States
Duration: Mar 17 2015Mar 21 2015

Publication series

NameGeotechnical Special Publication
VolumeGSP 256
ISSN (Print)0895-0563

Other

OtherInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015
CountryUnited States
CitySan Antonio
Period3/17/153/21/15

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Adams, B. T., & Xiao, M. (2015). Initial steps toward characterizing particle mobilization using pore-scale particle mobilization imaging experiments. In J. B. Anderson, M. Iskander, M. T. Suleiman, & D. F. Laefer (Eds.), IFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015 (pp. 2544-2553). (Geotechnical Special Publication; Vol. GSP 256). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784479087.236