Study of risk of developing a delayed ettringite formation and its consequences in concrete of nuclear structures
type: Dataset
description: Delayed ettringite formation (DEF) in concrete structures is a pathology that can develop when special conditions on the concrete composition, the thermal conditions at the young age and the environment are met. This phenomenon provokes swelling of the material and cracking in the structure. It affects two types of concrete : the concrete heat-treated and the concrete cast in place in massive parts. Although many studies were done before in order to better understand this pathology, the DEF is still not well known. This is due to its complex mechanism, the influential parameters and its consequences on microscopic and structural scales. For that purpose, the thesis work was designed in order to better understand this pathology. Experimental studies were done to evaluate the impact of certain factors during the reaction, by focusing on nuclear application. An important part of this study was dedicated to assess the risk of DEF development in a nuclear power plant, and to understand how this pathology affects the mechanical characteristics and transfer properties of the concrete. Then, we have studied the impact of the hygrometry on the development of DEF. This has lead to identify a relation between environmental humidity and swelling. We have also examined the role of alkali leaching. A follow up study of the transfer properties was also done and was confronted to the observed swelling. Finally, we were interested in the characterization of the aggregates effect on the kinetics and the amplitude of DEF swelling. So, we have examined the parameters related to the size and the volume fraction of granular inclusions. Furthermore, an application of a mesoscopic numerical modeling of swelling is proposed
landing page: https://theses.hal.science/tel-00787974
identifier: NNT: 2012PEST1110
keyword: beton
keyword: concrete
keyword: containment-vessel
keyword: def
keyword: enceinte-de-confinement
keyword: ettringite
keyword: ettrinigte
keyword: gonflement
keyword: infoeu-reposemanticsdoctoralthesis
keyword: rsi
keyword: spiotherengineering-sciences-physicsother
keyword: swelling
keyword: theses
keyword: transfer
keyword: transfert
issued: 2026-05-14T12:30:36.290899
modified: 2026-05-14T12:30:36.290904
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Study of risk of developing a delayed ettringite formation and its consequences in concrete of nuclear structures
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00787974
issued: 2026-05-14T12:30:36.330841
modified: 2026-05-14T12:30:36.259523