State of a bentonite barrier after 8 years of heating and hydration in the laboratory

María Victoria Villar, Ana María Fernández, Roberto Gómez, José F. Barrenechea, F. Javier Luque, Pedro Luis Martín, José Miguel Barcala

Resultado de la investigación: Conference contribution

2 Citas (Scopus)

Resumen

The conditions of the bentonite in an engineered barrier for HLW disposal have been simulated in a laboratory test. Six cylindrical blocks of bentonite compacted at a dry density of 1.64 g/cm3 were piled up in a hermetic Teflon cell. The total length of the clay column inside the cell was 60 cm. The bottom surface of the bentonite was heated at 100°C while the top surface was injected with granitic water. The duration of the test was 7.6 years. The water intake was measured during the test and, at the end, the cell was dismounted and the dry density, water content, mineralogy, geochemistry, and swelling capacity of the clay were measured in different sections along the column. At the end of the test no full water saturation was reached and water content and dry density gradients were found along the column. No mineralogical changes have been detected, although the pore water chemistry and the exchangeable complex of the smectite have changed along the bentonite. None of these changes affect drastically its swelling capacity, which remains high. The material used in this test is the FEBEX bentonite.

Idioma originalEnglish
Título de la publicación alojadaScientific Basis for Nuclear Waste Management XXX
Páginas593-598
Número de páginas6
Volumen985
EstadoPublished - 2007
Evento2006 MRS Fall Meeting - Boston, MA, United States
Duración: 27 nov 20061 dic 2006

Other

Other2006 MRS Fall Meeting
PaísUnited States
CiudadBoston, MA
Período27/11/061/12/06

Huella dactilar

Bentonite
Hydration
Heating
Water
Water content
Swelling
Clay
Geochemistry
Mineralogy
Polytetrafluoroethylene
Polytetrafluoroethylenes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Citar esto

Villar, M. V., Fernández, A. M., Gómez, R., Barrenechea, J. F., Luque, F. J., Martín, P. L., & Barcala, J. M. (2007). State of a bentonite barrier after 8 years of heating and hydration in the laboratory. En Scientific Basis for Nuclear Waste Management XXX (Vol. 985, pp. 593-598)
Villar, María Victoria ; Fernández, Ana María ; Gómez, Roberto ; Barrenechea, José F. ; Luque, F. Javier ; Martín, Pedro Luis ; Barcala, José Miguel. / State of a bentonite barrier after 8 years of heating and hydration in the laboratory. Scientific Basis for Nuclear Waste Management XXX. Vol. 985 2007. pp. 593-598
@inproceedings{c24210c796684cc49fb8af975ea99e00,
title = "State of a bentonite barrier after 8 years of heating and hydration in the laboratory",
abstract = "The conditions of the bentonite in an engineered barrier for HLW disposal have been simulated in a laboratory test. Six cylindrical blocks of bentonite compacted at a dry density of 1.64 g/cm3 were piled up in a hermetic Teflon cell. The total length of the clay column inside the cell was 60 cm. The bottom surface of the bentonite was heated at 100°C while the top surface was injected with granitic water. The duration of the test was 7.6 years. The water intake was measured during the test and, at the end, the cell was dismounted and the dry density, water content, mineralogy, geochemistry, and swelling capacity of the clay were measured in different sections along the column. At the end of the test no full water saturation was reached and water content and dry density gradients were found along the column. No mineralogical changes have been detected, although the pore water chemistry and the exchangeable complex of the smectite have changed along the bentonite. None of these changes affect drastically its swelling capacity, which remains high. The material used in this test is the FEBEX bentonite.",
author = "Villar, {Mar{\'i}a Victoria} and Fern{\'a}ndez, {Ana Mar{\'i}a} and Roberto G{\'o}mez and Barrenechea, {Jos{\'e} F.} and Luque, {F. Javier} and Mart{\'i}n, {Pedro Luis} and Barcala, {Jos{\'e} Miguel}",
year = "2007",
language = "English",
isbn = "9781558999428",
volume = "985",
pages = "593--598",
booktitle = "Scientific Basis for Nuclear Waste Management XXX",

}

Villar, MV, Fernández, AM, Gómez, R, Barrenechea, JF, Luque, FJ, Martín, PL & Barcala, JM 2007, State of a bentonite barrier after 8 years of heating and hydration in the laboratory. En Scientific Basis for Nuclear Waste Management XXX. vol. 985, pp. 593-598, 2006 MRS Fall Meeting, Boston, MA, United States, 27/11/06.

State of a bentonite barrier after 8 years of heating and hydration in the laboratory. / Villar, María Victoria; Fernández, Ana María; Gómez, Roberto; Barrenechea, José F.; Luque, F. Javier; Martín, Pedro Luis; Barcala, José Miguel.

Scientific Basis for Nuclear Waste Management XXX. Vol. 985 2007. p. 593-598.

Resultado de la investigación: Conference contribution

TY - GEN

T1 - State of a bentonite barrier after 8 years of heating and hydration in the laboratory

AU - Villar, María Victoria

AU - Fernández, Ana María

AU - Gómez, Roberto

AU - Barrenechea, José F.

AU - Luque, F. Javier

AU - Martín, Pedro Luis

AU - Barcala, José Miguel

PY - 2007

Y1 - 2007

N2 - The conditions of the bentonite in an engineered barrier for HLW disposal have been simulated in a laboratory test. Six cylindrical blocks of bentonite compacted at a dry density of 1.64 g/cm3 were piled up in a hermetic Teflon cell. The total length of the clay column inside the cell was 60 cm. The bottom surface of the bentonite was heated at 100°C while the top surface was injected with granitic water. The duration of the test was 7.6 years. The water intake was measured during the test and, at the end, the cell was dismounted and the dry density, water content, mineralogy, geochemistry, and swelling capacity of the clay were measured in different sections along the column. At the end of the test no full water saturation was reached and water content and dry density gradients were found along the column. No mineralogical changes have been detected, although the pore water chemistry and the exchangeable complex of the smectite have changed along the bentonite. None of these changes affect drastically its swelling capacity, which remains high. The material used in this test is the FEBEX bentonite.

AB - The conditions of the bentonite in an engineered barrier for HLW disposal have been simulated in a laboratory test. Six cylindrical blocks of bentonite compacted at a dry density of 1.64 g/cm3 were piled up in a hermetic Teflon cell. The total length of the clay column inside the cell was 60 cm. The bottom surface of the bentonite was heated at 100°C while the top surface was injected with granitic water. The duration of the test was 7.6 years. The water intake was measured during the test and, at the end, the cell was dismounted and the dry density, water content, mineralogy, geochemistry, and swelling capacity of the clay were measured in different sections along the column. At the end of the test no full water saturation was reached and water content and dry density gradients were found along the column. No mineralogical changes have been detected, although the pore water chemistry and the exchangeable complex of the smectite have changed along the bentonite. None of these changes affect drastically its swelling capacity, which remains high. The material used in this test is the FEBEX bentonite.

UR - http://www.scopus.com/inward/record.url?scp=41549126060&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:41549126060

SN - 9781558999428

VL - 985

SP - 593

EP - 598

BT - Scientific Basis for Nuclear Waste Management XXX

ER -

Villar MV, Fernández AM, Gómez R, Barrenechea JF, Luque FJ, Martín PL y otros. State of a bentonite barrier after 8 years of heating and hydration in the laboratory. En Scientific Basis for Nuclear Waste Management XXX. Vol. 985. 2007. p. 593-598