2D CFD-DEM simulations for injection of cement-based grout - The effect of particle adsorption

S. Sakakibara, T. Koyama, H. Shimizu

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

Abstract

Grouting is a widely used method to seal and/or reduce permeability of fractured rock masses around underground structures. However, the filtration and penetration mechanism of cement-based grout have not been clarified sufficiently yet due to complicated physical and chemical processes of grouting. Therefore, the grout material and injection parameters such as injection pressure and water/cement ratio (W/C) are usually determined empirically by technical experts at the injection site. In this paper, for better understanding of the penetration and filtration mechanism of cement-based grout through rock fractures, the two-dimensional numerical model of coupled Computational Fluid Dynamics and the Distinct Element Method (CFD-DEM) was developed and the effect of particle adsorption on the filtration and penetration mechanism was numerically investigated. The simulation results clearly show that the effect of particle adsorption on the movement of cement particles and the amount of injected cement particles is significant.

Original languageEnglish
Title of host publicationISRM International Symposium - 8th Asian Rock Mechanics Symposium, ARMS 2014
Editors Kaneko, Kodama, Shimizu
PublisherInternational Society for Rock Mechanics
Pages1959-1966
Number of pages8
ISBN (Electronic)9784907430030
Publication statusPublished - 2014 Jan 1
Event8th Asian Rock Mechanics Symposium, ARMS 2014 - Sapporo, Japan
Duration: 2014 Oct 142014 Oct 16

Publication series

NameISRM International Symposium - 8th Asian Rock Mechanics Symposium, ARMS 2014

Other

Other8th Asian Rock Mechanics Symposium, ARMS 2014
CountryJapan
CitySapporo
Period14/10/1414/10/16

Keywords

  • CFD-DEM
  • Cement-based grout
  • Grouting
  • Particle adsorption

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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