Journal article
Stabilization of liquefiable soils using colloidal silica grout
Journal of materials in civil engineering, v 19(1), pp 33-40
Jan 2007
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Passive site stabilization is a new technology proposed for nondisruptive mitigation of liquefaction risk at developed sites susceptible to liquefaction. It is based on the concept of slowly injecting colloidal silica at the edge of a site with subsequent delivery to the target location using natural or augmented groundwater flow. Colloidal silica is an aqueous dispersion of silica nanoparticles that can be made to gel by adjusting the pH or salt concentration of the dispersion. It stabilizes liquefiable soils by cementing individual grains together in addition to reducing the hydraulic conductivity of the formation. Centrifuge modeling was used to investigate the effect of colloidal silica treatment on the liquefaction and deformation resistance of loose, liquefiable sands during centrifuge in-flight shaking. Loose sand was successfully saturated with colloidal silica grout and subsequently subjected to two shaking events to evaluate the response of the treated sand layer. The treated soil did not liquefy during either shaking event. In addition, a box model was used to investigate the ability to uniformly deliver colloidal silica to loose sands using low-head injection wells. Five injection and two extraction wells were used to deliver stabilizer in a fairly uniform pattern to the loose sand formation. The results of the box model testing will be used to design future centrifuge model tests modeling other delivery methods of the grout.
Metrics
Details
- Title
- Stabilization of liquefiable soils using colloidal silica grout
- Creators
- Patricia M. Gallagher - Drexel University, Civil, Architectural, and Environmental EngineeringAhmet Pamuk - Dept. of Civil Engineering and Engineering Mechanics, Columbia Univ., United StatesTarek Abdoun - Rensselaer Polytechnic Institute
- Publication Details
- Journal of materials in civil engineering, v 19(1), pp 33-40
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering; School of Engineering
- Web of Science ID
- WOS:000243046000007
- Scopus ID
- 2-s2.0-33845645589
- Other Identifier
- 991014632193504721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
Source: SDGs in the Output
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Construction & Building Technology
- Engineering, Civil
- Materials Science, Multidisciplinary