Long-term performance of cementitious materials used in nuclear waste disposal-a case study at SCK•CEN

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Institutes & Expert groups

  • PSI - Paul Scherrer Institute

Abstract

This paper presents an overview of a research program at the Belgian Nuclear Research Centre (SCK•CEN) concerning long-termdurability of cementitious materials.The need for this research originates from the Belgian nuclear waste disposal concept, which proposes ordinary portland cement as the candidate binder for engineered barriers. Three main degradation mechanisms are considered: calcium leaching, carbonation and combined leaching/carbonation. Specifically, the effect of these mechanisms on microstructural changes and hence on physical and transport properties are discussed.The discussion concerns recent advances in experimental techniques and numerical tools in support of experimental programme. Novel experimental techniques cover accelerated degradation experiments for sound/fractured material, and transport experiments to determine water permeability and diffusion coefficient. Numerical tool covers recent implementation of lattice-Boltzmann based reactive transport code to handle micro-meso-continuum scale modelling.

Details

Original languageEnglish
Title of host publicationLife-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision
Subtitle of host publicationProceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium
PublisherTaylor & Francis (CRC)
Pages619-627
Number of pages9
Edition2019
ISBN (Print)978-1-138-62633-1
Publication statusPublished - 2019
Event2018 - IALCCE - The Sixth International Symposium on Life-Cycle Civil - Gent - ICC International Convention Centre , Gent , Belgium
Duration: 28 Oct 201831 Oct 2018
http://www.ialcce2018.org/#/home

Conference

Conference2018 - IALCCE - The Sixth International Symposium on Life-Cycle Civil - Gent
Abbreviated titleIALCCE 2018
CountryBelgium
CityGent
Period2018-10-282018-10-31
OtherIn our contemporary high-level society, civil engineering structures are expected to be designed to meet long-term requirements related to structural safety, robustness, serviceability, durability and sustainability. Life-cycle civil engineering provides the knowledge and tools to accommodate for these requirements and relates to the design, inspection, monitoring, assessment, maintenance and rehabilitation of structures and infrastructures taking into account their lifetime perspective. The last decades there is a growing awareness of the importance of a life-cycle perspective in civil engineering and challenges exist to tackle the contemporary needs, for example related to the long-term prediction of material behaviour and structural response, the assessment of existing structures, inspection and maintenance strategies, life-cycle optimization, etc. Considering these needs, the objective of the International Association for Life-Cycle Civil Engineering (IALCCE) is to promote international cooperation in this field of expertise.
Internet address

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