Jacques Jabbour, a research engineer in structural mechanics at IRSN, has won the award for the best oral presentation at the Scientific Days event held on July 12 and 13, 2018 by the RF2B(1) (Regroupement Francophone pour la recherche et la Formation sur le Béton – Francophone group for research and education on concrete).
Jacques Jabbour during his presentation © IRSN/RF2B
This award recognizes the scientific quality and originality of his thesis entitled "Test methods for accelerated aging of concrete on the scale of the structures". The aim of the research was to develop an accelerated aging test protocol applied to structures representative of parts of nuclear reactor containments, a first at this scale in France. The acceleration of aging not only provides a pertinent physical representation, but is also essential for studying phenomena that develop typically over a period of around 40 years. Jacques Jabbour has designed an experimental device and instrumentation methods that can accelerate and monitor the evolution of pathologies(2) in concrete blocks on a large scale (2.40 x 1.40 x 1.00 m³). The acceleration technique he has developed has improved estimation of the mechanical effects of the pathologies affecting concrete. A patent application has been filed for the technique. This research forms part of work to extend the service life of nuclear power plants.
developed out of an understanding between French-speaking university laboratories in Canada (Quebec), France, Switzerland, Belgium and Luxembourg. The aim of the group is primarily to promote formal scientific exchanges between the member universities and secondly to foster collaborative research.
(2) Pathologies are phenomena that involve chemical reactions (e.g. DEF, or delayed ettringite formation), which occur within concrete over a very long period of time and cause changes in its composition and degradation of its mechanical properties.