Alain Sellier

Modelling mechanical effects of AAR and DEF

After a first period at the LMT of ENS Cachan (1992-1996) where he obtained his PhD working on AAR problems in the team of Prof. M. Morenville-Regourd, and on mechanical and probabilistic coupling applied to civil engineering works, he joined the University of Paris-Est in 1996 as an associate professor where he began a long-term collaboration with E. Bourdarot (expert engineer at EDF-CIH-Chambéry) to develop a finite element model applicable to large dams affected by the AAR. This model was implemented in Code-Aster in 2007 during the PhD of E. Grimal, now at EDF-CIH. Professor Alain Sellier joined the LMDC of the Paul Sabatier University of Toulouse in 2002. He led this civil engineering laboratory of about 110 researchers from 2014 to 2020. He is also responsible for the Master's degree in Civil Engineering at the Paul Sabatier University of Toulouse since 2005. Between 2010 and 2019 he was also Scientific Advisor to the OECD-NEA on AAR issues in North America. Since 2006, he has collaborated with Prof. V. Saouma (University of Boulder) to propose a set of numerical tests to validate structural models of AAR. These tests are available in the TC Rilem 259-ISR final report. Professor Alain Sellier is currently the head of the LMDC's "Multi-physics, multi-scale and probabilism" working group where he develops, in the framework of the finite element methods, multiscale models applicable at structural scale. The application domains of these models are, the dams with EDF (Dr E.Grimal and Dr P.Kolmayer) and TRACTEBEL-ENGIE (Dr C.Noret and Dr P. Antiniac), the nuclear installations (CEA with Dr A.Millard, EDF with Ing B.Masson, ANDRA with Dr X.Bourbon, EURAD project…), the bridges with the scientific direction of Vinci-Large-Projects (with Ing L.Boutillon and L.Linger). Since march 2019, he is also President-Elect of the University Association of Civil Engineering (AUGC).

Andreas Leemann

Alkali silica reaction – sequence, products and possible mechanisms of expansion

Andreas Leemann graduated in geology at the ETH Zurich in 1989 and finished his PhD on lake research in 1993. Since 1995 he works at Empa in Switzerland in the concrete / construction chemistry laboratory and currently heads the concrete technology group. He works mainly on the durability of concrete including sulfate attack, leaching and carbonation. A particular focus of his work is on ASR where he employs a variety of microscopy methods to characterize the microstructure. Additionally, he studies the visco-elastic properties of concrete and is active in the field of recycling concrete. He is a member of national and international standardization groups and is active in RILEM committees.
LEEMANN, Andreas
Born: 23.07.1965, Maur/Switzerland
Nationality: Swiss
Current position
Group Leader Concrete Technolgy, Empa, Überlandstr. 129, CH-8600 Dübendorf
Education
1990-1993        PhD in Limnogeology "Holocene glacial activity and climatic variations in the Swiss Alps: reconstructing a continuous record from proglacial lake sediments" at ETH Zurich with Prof. K. Hsü
1984-1989        Master Degree in Geology at ETH Zürich
Professional and academic experience
since 2003         Empa, Dübendorf, Group leader Concrete technology
1995-2003        Empa, Dübendorf, Scientist in Laboratory Concrete / Construction Chemistry
since January 2003 Head of Concrete Technology Group
1990                     Büchi and Müller, Frauenfeld, Project Manager in Geological Consulting
Focus
Durability of concrete including alkali-silica reaction, sulfate attack and carbonation
Visco-elastic behaviour of concrete
Recycling concrete

António Batista

Deterioration processes of dams affected by concrete swelling reactions. The Portuguese experience in monitoring and rehabilitation

Born in 1960, PhD in Civil Engineering in 1998, by Instituto Superior Técnico (IST), Lisbon, he has developed his main professional activity in the Concrete Dams Department (DBB) of National Laboratory for Civil Engineering (LNEC) since 1986, in the following areas: i) analysis and interpretation of the observed behavior of concrete and masonry dams, using mathematical modelling; ii) instrumentation, monitoring and inspection of concrete and masonry dams; and iii) deterioration and rehabilitation of masonry and concrete dams, particularly those ones affected by concrete swelling reactions. He was involved in numerous studies, related with different aspects of dams’ safety, in the stages of design, construction, first filling of the reservoir, operation and rehabilitation, in Portugal and abroad.
He is a Senior Researcher of LNEC and, since May 2013, head of DBB. He is a member of the Commission on Dam Regulations. Since 1998, he has been teaching at the Civil Engineering Department of the Faculty of Sciences and Technology of the New University of Lisbon, as an Invited Associate Professor.

Benoit Fournier

Alkali-silica reaction – physical and chemical effects

Benoit Fournier is professor at the Department of Geology and Engineering Geology of Laval University in Québec City (Québec, Canada) (2007-), from where he got his PhD in 1993. From 1990 to 2007, he worked for the Advanced Concrete Technology Program of CANMET, Department of Natural Resources (Ottawa, Canada). Dr. Fournier is currently the Chair of CSA technical subcommittee on Aggregate’s Reaction in concrete. He is the Director of the Quebec’s Research Centre on Concrete Infrastructures (CRIB).
Dr. Fournier’s main research interests are in the various aspects of aggregates technology technology, recycling and sustainable development in concrete construction, durability of concrete, especially issues related to deleterious aggregates reactions in concrete (e.g. alkali-aggregate reaction, oxidation in sulphide-bearing aggregates, frost-susceptible aggregates). He is currently co-chairing the NRCC — RBQ partnership research chair on the Impact of pyrrhotite on the durability of concrete structures in Canada. .

Kazuo Yamada

Importance of petrographic diagnosis and a proposal of comprehensive management flow of concrete structures for alkali-aggregate reaction

Dr. Kazuo Yamada is a senior researcher in National Institute for Environmental Studies in Japan. His present major task is the rad-waste management in off-site after Fukushima-Daiichi nuclear power plant accident. And he has interests in the long-term safety of disposal facility made of concrete for long term from the viewpoint of ASR. He graduated from the geochemical course in the University of Tokyo in 1988 and joined Taiheiyo Cement as a research scientist. He earned his degree on the working mechanism of polycarboxylate superplasticizer in 2000. He has chaired several research committees in Japan Concrete Institute. He has worked with Kyushu University for long term. His research results and knowledge are based on the collaboration with Dr. Kawabata and Prof. Sagawa, and kind suggestions from Dr. Tetsuya Katayama.