Effect of bentonite migration in geosynthetic clay liners on contaminant transport

T. D. Stark, Hangseok Choi, R. Akhtarshad

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

Abstract

Since the introduction of geosynthetic clay liners (GCLs) to waste containment facilities, one of the major concerns about their use has been the hydraulic equivalency to a compacted clay liner as required by regulations. Laboratory test results and more recently field observations show that the thickness, or mass per unit area, of hydrated bentonite in a GCL can decrease under normal stress, especially around zones of stress concentration or nonuniform stresses, such as a rock or roughness in the subgrade, a leachate sump, or wrinkles in an overlying geomembrane. This paper describes the effect of bentonite migration on the hydraulic equivalence between a GCL and GCL and the contaminant transport through a thinned GCL. Finally, the paper presents suggestions for protecting hydrated bentonite from stress concentrations and reducing contaminant transport through a GCL.

Original languageEnglish
Title of host publicationGeotechnical Special Publication
Pages3233-3247
Number of pages15
Edition130-142
Publication statusPublished - 2005
Externally publishedYes
EventGeo-Frontiers 2005 - Austin, TX, United States
Duration: 2005 Jan 242005 Jan 26

Other

OtherGeo-Frontiers 2005
CountryUnited States
CityAustin, TX
Period05/1/2405/1/26

Fingerprint

clay liner
bentonite
Bentonite
geosynthetics
pollutant transport
Clay
clay
Impurities
Stress concentration
fluid mechanics
Hydraulics
Geomembranes
hydraulics
geomembrane
subgrade
roughness
leachates
containment
effect
leachate

ASJC Scopus subject areas

  • Soil Science
  • Building and Construction
  • Architecture

Cite this

Stark, T. D., Choi, H., & Akhtarshad, R. (2005). Effect of bentonite migration in geosynthetic clay liners on contaminant transport. In Geotechnical Special Publication (130-142 ed., pp. 3233-3247)

Effect of bentonite migration in geosynthetic clay liners on contaminant transport. / Stark, T. D.; Choi, Hangseok; Akhtarshad, R.

Geotechnical Special Publication. 130-142. ed. 2005. p. 3233-3247.

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

Stark, TD, Choi, H & Akhtarshad, R 2005, Effect of bentonite migration in geosynthetic clay liners on contaminant transport. in Geotechnical Special Publication. 130-142 edn, pp. 3233-3247, Geo-Frontiers 2005, Austin, TX, United States, 05/1/24.
Stark TD, Choi H, Akhtarshad R. Effect of bentonite migration in geosynthetic clay liners on contaminant transport. In Geotechnical Special Publication. 130-142 ed. 2005. p. 3233-3247
Stark, T. D. ; Choi, Hangseok ; Akhtarshad, R. / Effect of bentonite migration in geosynthetic clay liners on contaminant transport. Geotechnical Special Publication. 130-142. ed. 2005. pp. 3233-3247
@inproceedings{8ae1e37c44bc46a5b4a87a5c9e97c023,
title = "Effect of bentonite migration in geosynthetic clay liners on contaminant transport",
abstract = "Since the introduction of geosynthetic clay liners (GCLs) to waste containment facilities, one of the major concerns about their use has been the hydraulic equivalency to a compacted clay liner as required by regulations. Laboratory test results and more recently field observations show that the thickness, or mass per unit area, of hydrated bentonite in a GCL can decrease under normal stress, especially around zones of stress concentration or nonuniform stresses, such as a rock or roughness in the subgrade, a leachate sump, or wrinkles in an overlying geomembrane. This paper describes the effect of bentonite migration on the hydraulic equivalence between a GCL and GCL and the contaminant transport through a thinned GCL. Finally, the paper presents suggestions for protecting hydrated bentonite from stress concentrations and reducing contaminant transport through a GCL.",
author = "Stark, {T. D.} and Hangseok Choi and R. Akhtarshad",
year = "2005",
language = "English",
pages = "3233--3247",
booktitle = "Geotechnical Special Publication",
edition = "130-142",

}

TY - GEN

T1 - Effect of bentonite migration in geosynthetic clay liners on contaminant transport

AU - Stark, T. D.

AU - Choi, Hangseok

AU - Akhtarshad, R.

PY - 2005

Y1 - 2005

N2 - Since the introduction of geosynthetic clay liners (GCLs) to waste containment facilities, one of the major concerns about their use has been the hydraulic equivalency to a compacted clay liner as required by regulations. Laboratory test results and more recently field observations show that the thickness, or mass per unit area, of hydrated bentonite in a GCL can decrease under normal stress, especially around zones of stress concentration or nonuniform stresses, such as a rock or roughness in the subgrade, a leachate sump, or wrinkles in an overlying geomembrane. This paper describes the effect of bentonite migration on the hydraulic equivalence between a GCL and GCL and the contaminant transport through a thinned GCL. Finally, the paper presents suggestions for protecting hydrated bentonite from stress concentrations and reducing contaminant transport through a GCL.

AB - Since the introduction of geosynthetic clay liners (GCLs) to waste containment facilities, one of the major concerns about their use has been the hydraulic equivalency to a compacted clay liner as required by regulations. Laboratory test results and more recently field observations show that the thickness, or mass per unit area, of hydrated bentonite in a GCL can decrease under normal stress, especially around zones of stress concentration or nonuniform stresses, such as a rock or roughness in the subgrade, a leachate sump, or wrinkles in an overlying geomembrane. This paper describes the effect of bentonite migration on the hydraulic equivalence between a GCL and GCL and the contaminant transport through a thinned GCL. Finally, the paper presents suggestions for protecting hydrated bentonite from stress concentrations and reducing contaminant transport through a GCL.

UR - http://www.scopus.com/inward/record.url?scp=17044399279&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17044399279&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:17044399279

SP - 3233

EP - 3247

BT - Geotechnical Special Publication

ER -