OcrV1, Main, Exploration, bibRecord, 000197

Experimental investigation on the thermal volumetric behavior of highly compacted GMZ01 Bent

Identifieur interne : 000197 ( Main/Exploration ); précédent : 000196; suivant : 000198

Experimental investigation on the thermal volumetric behavior of highly compacted GMZ01 Bent

Auteurs : W. M. Ye [République populaire de Chine] ; Y. W. Zhang [République populaire de Chine] ; Y. G. Chen [République populaire de Chine] ; B. Chen [République populaire de Chine] ; Y. J. Cui [République populaire de Chine, France]

Source :

Applied clay science [ 0169-1317 ] ; 2013.

RBID : Pascal:13-0346157

Descripteurs français

Pascal (Inist)
- Tampon, Matériau remblai, Déchet haute activité, Pression, Succion, Température, Refroidissement, Gonflement, Contraction, Haute pression, Basse pression, Expansion, Déformation sous contrainte, Epaisseur, Microstructure, Réduction.

English descriptors

KwdEn :
- backfill, buffers, contraction, cooling, expansion, high pressure, high-level waste, low pressure, microstructures, pressure, reduction, strain, suction, swelling, temperature, thickness.

Abstract

Gaomiaozi (GMZ) Bent has been recognized as the potential buffer/backfill material for construction of Chinese deep geological repository for disposal of high-level radioactive waste (HLW). For investigation of pressure and suction effects on the thermal volumetric behavior of the highly compacted GMZ01 Bent, a new suction-temperature controlled oedometer was developed. Several suction and pressure controlled cyclic heating and cooling tests have been performed on highly compacted GMZ01 Bent. Suctions ranging from 4 to 110 MPa, temperatures from 25 to 80 °C and vertical loads from 0.1 to 5 MPa were applied. Results show that heating at constant suction and pressure induces either swelling or contraction. At high pressure and low suction, heating tends to induce contraction, while at low pressure and high suction, heating induces expansion. Thermal volumetric strain of GMZ01 Bent tested strongly depends on the overconsolidation ratio (OCR). Two opposite mechanisms are considered to explain the observed phenomena, that is, the volume increase induced by the thermal expansion of the mineralogical components and the adsorbed water and the double-layer thickness at the microstructure level, as well as the volume reduction caused by the macrostructural rearrangements.

Url:

https://hal-enpc.archives-ouvertes.fr/hal-00946098

Affiliations:

Le document en format XML

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<term>high-level waste</term>
<term>low pressure</term>
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<term>Température</term>
<term>Refroidissement</term>
<term>Gonflement</term>
<term>Contraction</term>
<term>Haute pression</term>
<term>Basse pression</term>
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<front><div type="abstract" xml:lang="en">Gaomiaozi (GMZ) Bent has been recognized as the potential buffer/backfill material for construction of Chinese deep geological repository for disposal of high-level radioactive waste (HLW). For investigation of pressure and suction effects on the thermal volumetric behavior of the highly compacted GMZ01 Bent, a new suction-temperature controlled oedometer was developed. Several suction and pressure controlled cyclic heating and cooling tests have been performed on highly compacted GMZ01 Bent. Suctions ranging from 4 to 110 MPa, temperatures from 25 to 80 °C and vertical loads from 0.1 to 5 MPa were applied. Results show that heating at constant suction and pressure induces either swelling or contraction. At high pressure and low suction, heating tends to induce contraction, while at low pressure and high suction, heating induces expansion. Thermal volumetric strain of GMZ01 Bent tested strongly depends on the overconsolidation ratio (OCR). Two opposite mechanisms are considered to explain the observed phenomena, that is, the volume increase induced by the thermal expansion of the mineralogical components and the adsorbed water and the double-layer thickness at the microstructure level, as well as the volume reduction caused by the macrostructural rearrangements.</div>
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Experimental investigation on the thermal volumetric behavior of highly compacted GMZ01 Bent

Experimental investigation on the thermal volumetric behavior of highly compacted GMZ01 Bent

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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