Concrete in engineered barriers for radioactive waste disposal facilities – Phenomenological study and assessment of long term performance

TY - GEN

T1 - Concrete in engineered barriers for radioactive waste disposal facilities – Phenomenological study and assessment of long term performance

AU - Jacques, Diederik

AU - Maes, Norbert

AU - Perko, Janez

AU - Seetharam, Suresh

AU - Phung, Quoc Tri

AU - Patel, Ravi

AU - Soto Masip, Albert

AU - Liu, Sanheng

AU - Wang, Lian

AU - De Schutter, G.

AU - Ye, G.

AU - van Breughel, K.

A2 - Druyts, Frank

N1 - Score = 3

PY - 2013/9

Y1 - 2013/9

N2 - The paper aims to highlight recent developments at the Belgian Nuclear Research Centre SCK•CEN in experimental and numerical study of the coupled physical-chemical behaviour of concrete subject to chemical degradation. The discussion mainly focusses on three interlinked research projects covering novel experimental methods to study the alteration of hydraulic and transport properties during carbonation and calcium leaching, a pore scale numerical model to capture microstructural changes due to the above degradation processes and a generic multiscale model aimed at determining evolution of the properties of a macrostructure over the long term. The paper also describes supplementary continuum scale numerical studies concerning concrete-clay interactions and geochemical impact on the physical structure of concrete. Preliminary findings from these studies show encouraging results such as the development of novel leaching, water permeability and diffusion apparatus, a robust pore scale model based on Lattice-Boltzmann method and a mesoscale study focused on the importance of interfacial transition zones on the effective diffusivity for linear and nonlinear diffusion problems.

AB - The paper aims to highlight recent developments at the Belgian Nuclear Research Centre SCK•CEN in experimental and numerical study of the coupled physical-chemical behaviour of concrete subject to chemical degradation. The discussion mainly focusses on three interlinked research projects covering novel experimental methods to study the alteration of hydraulic and transport properties during carbonation and calcium leaching, a pore scale numerical model to capture microstructural changes due to the above degradation processes and a generic multiscale model aimed at determining evolution of the properties of a macrostructure over the long term. The paper also describes supplementary continuum scale numerical studies concerning concrete-clay interactions and geochemical impact on the physical structure of concrete. Preliminary findings from these studies show encouraging results such as the development of novel leaching, water permeability and diffusion apparatus, a robust pore scale model based on Lattice-Boltzmann method and a mesoscale study focused on the importance of interfacial transition zones on the effective diffusivity for linear and nonlinear diffusion problems.

KW - chemical degradation

KW - concrete

KW - engineered barriers

KW - radioactive waste disposal facilities

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_130951

UR - http://knowledgecentre.sckcen.be/so2/bibref/10515

M3 - In-proceedings paper

SP - 1

EP - 10

BT - Proceedings of the ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. ICEM2013 (on CD)

CY - United States

T2 - ICEM 2013 - 15th International Conference On Environmental Remediation And Radioactive Waste Management

Y2 - 8 September 2013 through 12 September 2013

ER -