Journal article
Colloidal Silica Transport through Liquefiable Porous Media
Journal of geotechnical and geoenvironmental engineering, v 135(11), pp 1702-1712
01 Nov 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Mitigation of liquefaction potential in loose granular soil can theoretically be achieved through permeation and subsequent gelation of dilute colloidal silica stabilizer. However, practical application of this technique requires efficient and adequate delivery of the stabilizer to the liquefiable soil prior to gelation. The purpose of this research was to evaluate colloidal silica transport mechanisms and to determine if an adequate concentration can be delivered to a soil column prior to gelation. The laboratory work consisted of grouting 15 short (0.9 m) columns tests packed with Nevada No. 120, Ottawa 20/30, or graded silty sand to identify the variables that influence stabilizer transport through porous media. It was found that colloidal silica can be successfully delivered through 0.9-m columns packed with loose sand efficiently and in an adequate concentration to mitigate the liquefaction potential. Transport occurs primarily by advection with limited hydrodynamic dispersion, so Darcy's law can be used to predict flow. The Kozeny-Carmen equation can be used to include the effect of increasing viscosity on transport by incorporating the power law mixing rule of Todd. The primary variables influencing stabilizer transport were found to be the viscosity of the colloidal silica stabilizer, the hydraulic gradient, and the hydraulic conductivity of the liquefiable soil.
Metrics
Details
- Title
- Colloidal Silica Transport through Liquefiable Porous Media
- Creators
- Patricia M. Gallagher - Drexel UniversityYuanzhi Lin - Drexel University
- Publication Details
- Journal of geotechnical and geoenvironmental engineering, v 135(11), pp 1702-1712
- Publisher
- Asce-Amer Soc Civil Engineers
- Number of pages
- 11
- Grant note
- CMS-0219987 / United States National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Web of Science ID
- WOS:000270913200015
- Scopus ID
- 2-s2.0-70350397351
- Other Identifier
- 991019167956804721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Geological
- Geosciences, Multidisciplinary