Sealing performance of bentonite/clay borehole plugs when tested in-situ in granite

Persistent Link:
http://hdl.handle.net/10150/278538
Title:
Sealing performance of bentonite/clay borehole plugs when tested in-situ in granite
Author:
Kimbrell, Allen F., 1947-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
This thesis describes in-situ flow tests on bentonite borehole plugs installed in granite, as well as laboratory experiments on similar plugs. Prior to sealing, the hydraulic conductivity of the boreholes is tested. These measurements, together with core logs and borehole videologs, permit the selection of suitable seal test intervals. Standard waterwell sealing bentonite products and emplacement procedures are used for borehole sealing. Transient (short-term) and steady-state (long-term) testing determines the sealing performance of the plugs (although the premature termination of the "steady state" testing precluded full data collection). Laboratory and field experiments confirm the great difficulty of obtaining accurate performance values for bentonite plugs as installed, due to the simultaneous saturation, swelling, and consolidation effects. Conventional installation of readily available seals can provide adequate borehole seals. Bentonite plugs of this type are heterogeneous and weak. Improved testing procedures and analyses are needed if actual conductivity values are to be obtained in a reasonable testing time.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Hydrology.; Geotechnology.; Engineering, Civil.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Daemen, Jaak J. K.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSealing performance of bentonite/clay borehole plugs when tested in-situ in graniteen_US
dc.creatorKimbrell, Allen F., 1947-en_US
dc.contributor.authorKimbrell, Allen F., 1947-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThis thesis describes in-situ flow tests on bentonite borehole plugs installed in granite, as well as laboratory experiments on similar plugs. Prior to sealing, the hydraulic conductivity of the boreholes is tested. These measurements, together with core logs and borehole videologs, permit the selection of suitable seal test intervals. Standard waterwell sealing bentonite products and emplacement procedures are used for borehole sealing. Transient (short-term) and steady-state (long-term) testing determines the sealing performance of the plugs (although the premature termination of the "steady state" testing precluded full data collection). Laboratory and field experiments confirm the great difficulty of obtaining accurate performance values for bentonite plugs as installed, due to the simultaneous saturation, swelling, and consolidation effects. Conventional installation of readily available seals can provide adequate borehole seals. Bentonite plugs of this type are heterogeneous and weak. Improved testing procedures and analyses are needed if actual conductivity values are to be obtained in a reasonable testing time.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectHydrology.en_US
dc.subjectGeotechnology.en_US
dc.subjectEngineering, Civil.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorDaemen, Jaak J. K.en_US
dc.identifier.proquest1342661en_US
dc.identifier.bibrecord.b26592617en_US
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