Injectable barriers for waste isolation

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In this paper the authors report laboratory work and numerical simulation done in support of development and demonstration of injectable barriers formed from either of two fluids: colloidal silica or polysiloxane. Two principal problems addressed here are control of gel time and control of plume emplacement in the vadose zone. Gel time must be controlled so that the viscosity of the barrier fluid remains low long enough to inject the barrier, but increases soon enough to gel the barrier in place. During injection, the viscosity must be low enough to avoid high injection pressures which could uplift or fracture the ... continued below

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11 p.

Creation Information

Persoff, P.; Finsterle, S.; Moridis, G.J.; Apps, J.; Pruess, K. & Muller, S.J. March 1, 1995.

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Description

In this paper the authors report laboratory work and numerical simulation done in support of development and demonstration of injectable barriers formed from either of two fluids: colloidal silica or polysiloxane. Two principal problems addressed here are control of gel time and control of plume emplacement in the vadose zone. Gel time must be controlled so that the viscosity of the barrier fluid remains low long enough to inject the barrier, but increases soon enough to gel the barrier in place. During injection, the viscosity must be low enough to avoid high injection pressures which could uplift or fracture the formation. To test the grout gel time in the soil, the injection pressure was monitored as grouts were injected into sandpacks. When grout is injected into the vadose zone, it slumps under the influence of gravity, and redistributes due to capillary forces as it gels. The authors have developed a new module for the reservoir simulator TOUGH2 to model grout injection into the vadose zone, taking into account the increase of liquid viscosity as a function of gel concentration and time. They have also developed a model to calculate soil properties after complete solidification of the grout. The numerical model has been used to design and analyze laboratory experiments and field pilot tests. The authors present the results of computer simulations of grout injection, redistribution, and solidification.

Physical Description

11 p.

Notes

INIS; OSTI as DE96000134

Source

  • 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995

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  • Other: DE96000134
  • Report No.: LBL--36739
  • Report No.: CONF-950828--19
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/106544 | External Link
  • Office of Scientific & Technical Information Report Number: 106544
  • Archival Resource Key: ark:/67531/metadc625426

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 5, 2016, 11:42 a.m.

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Persoff, P.; Finsterle, S.; Moridis, G.J.; Apps, J.; Pruess, K. & Muller, S.J. Injectable barriers for waste isolation, report, March 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc625426/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.