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 original | English |
|---|---|
| Título de la publicación alojada | Scientific Basis for Nuclear Waste Management XXX |
| Páginas | 593-598 |
| Número de páginas | 6 |
| Volumen | 985 |
| Estado | Published - 2007 |
| Evento | 2006 MRS Fall Meeting - Boston, MA, United States Duración: 27 nov 2006 → 1 dic 2006 |
Other
| Other | 2006 MRS Fall Meeting |
|---|---|
| País | United States |
| Ciudad | Boston, MA |
| Período | 27/11/06 → 1/12/06 |
Huella dactilar
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
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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 -