Rapid estimate of solid volume in large tuff cores using a gas pycnometer

Persistent Link:
http://hdl.handle.net/10150/192088
Title:
Rapid estimate of solid volume in large tuff cores using a gas pycnometer
Author:
Geddis, A. M.
Issue Date:
1996
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:
A thermally-insulated, rigid-volume gas pycnometer system has been developed. The pycnometer chambers have been machined from solid PVC cylinders. Two chambers confine dry high-purity helium at different pressure. A thick-walled design ensures minimal heat exchange with the surrounding environment and a constant volume system, while expansion takes place between the chambers. The internal energy of the gas is assumed constant over the expansion. The ideal gas law is used to estimate the volume of solid material sealed in one of the chambers. Temperature is monitored continuously, and incorporated into the calculation of solid volume. Temperature variation between measurements is less than 0.1 °C. The data are used to compute grain density for oven dried Apache Leap tuff core samples. The measured volume of solid and the sample bulk volume are used to estimate porosity and bulk density. Intrinsic permeability was estimated from the porosity and measured pore surface area, and is compared to in-situ measurements by the air-permeability method. The gas pycnometer accommodates large core samples (0.25 m length x 0.11 m diameter), and can measure solid volume greater than 220 cm³ with less than 1% error.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Pycnometer.; Volcanic ash, tuff, etc. -- Sampling -- Arizona.; Soils -- Sampling -- Arizona.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bassett, Randy L.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleRapid estimate of solid volume in large tuff cores using a gas pycnometeren_US
dc.creatorGeddis, A. M.en_US
dc.contributor.authorGeddis, A. M.en_US
dc.date.issued1996en_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.abstractA thermally-insulated, rigid-volume gas pycnometer system has been developed. The pycnometer chambers have been machined from solid PVC cylinders. Two chambers confine dry high-purity helium at different pressure. A thick-walled design ensures minimal heat exchange with the surrounding environment and a constant volume system, while expansion takes place between the chambers. The internal energy of the gas is assumed constant over the expansion. The ideal gas law is used to estimate the volume of solid material sealed in one of the chambers. Temperature is monitored continuously, and incorporated into the calculation of solid volume. Temperature variation between measurements is less than 0.1 °C. The data are used to compute grain density for oven dried Apache Leap tuff core samples. The measured volume of solid and the sample bulk volume are used to estimate porosity and bulk density. Intrinsic permeability was estimated from the porosity and measured pore surface area, and is compared to in-situ measurements by the air-permeability method. The gas pycnometer accommodates large core samples (0.25 m length x 0.11 m diameter), and can measure solid volume greater than 220 cm³ with less than 1% error.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshPycnometer.en_US
dc.subject.lcshVolcanic ash, tuff, etc. -- Sampling -- Arizona.en_US
dc.subject.lcshSoils -- Sampling -- Arizona.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairBassett, Randy L.en_US
dc.identifier.oclc213468024en_US
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