| Prof. Børge Johannes Wigum, wigum@mannvit.is |
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Engineering Geologist, Ph.D. Mannvit Engineering, Iceland
Adjunct Professor, Norwegian University of Science and Technology
Founder, International Centre of Research and Applied Technology for Alkali Aggregate Reactions.
Børge Johannes Wigum, originally from Norway, holds a Ph.D. in Engineering Geology from the Norwegian University of Science and Technology. He is the founder of the International Centre of Research and Applied Technology for Alkali Aggregate Reactions. He is a regular member of RILEM Technical Committee TC 219-ACS and has since 1999 chaired FARIN (Forum on Alkali-Reactions in Norway). In 2008 he was chairman of the 13th International Conference on Alkali-Aggregate Reactions in Concrete (ICAAR). Previously he operated his consulting company ERGO Engineering Geology Ltd, Iceland. In addition to his position in Iceland, he is engaged as an adjunct professor at the Norwegian University of Science and Technology in Trondheim, Norway, where he in addition to teaching aggregate technology, supervise PhD. students in the field of AAR.
His main research experiences are aggregate properties related to AAR, including petrographic examination and the structural state and deformation of quartz minerals, which also was the topic of his PhD. thesis in 1995. During the last 20 years, he has been involved in the development of test methods, criteria and recommendations regarding AAR in Norway. He is now leading analogous work in Iceland, with the emphasis of research and development of the RILEM performance tests. |
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Dr. Gísli Guðmundsson, gislig@mannvit.is
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Geochemist, Ph.D. Mannvit Engineering, Iceland
A native of Iceland, Dr. Guðmundsson holds a Ph.D. in
Geochemistry from Arizona State University. Dr. Guðmundsson has been
involved in researching concrete durability for over 16 years. Prior
to Mannvit, he worked as a cement and concrete expert for the Icelandic
Building Research Institute.
He has been involved with the durability of concrete such as freeze/thaw resistance, Alkali Aggregate Reactions, chloride penetration, chloride induced reinforcement corrosion, non destructive testing of concrete, evaluation of cement quality, water tightening of concrete, fire resistant shotcrete and microscopic evaluation of concrete samples. This work has been conducted in Icelandic as well as abroad. He is a member of the International Alkali Aggregate Reactions Committee. During the progress of his work, he has published numerous reports and scientific papers. |
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| Þorbjörg Hólmgeirsdóttir, thh@mannvit.is |
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Geological Engineer, M.Sc. Mannvit Engineering, Iceland
Laboratory Manager, Mannvits Testing & Research Laboratory
A native of Iceland, Ms. Hólmgeirsdóttir holds a M.S.
in Geotechnical Engineering from the University of Strathclyde in
Glasgow. She has over 20 years of experience in the
research and testing of aggregate properties, having worked as
geologist at the Icelandic Building Research Institute, as a researcher
and lecturer at the University of Strathclyde and the University of
Iceland, among others. She is also part-time teacher at the
University of Reykjavík.
Ms. Hólmgeirsdóttir’s main expertise is aggregate testing, especially with reference to the effects of alteration and weathering on durability. She has further been involved in various research projects related to sustainable use of aggregates and aggregate resources and production. She has experience in implementation and upkeep of factory production control in aggregate production.
Ms. Hólmgeirsdóttir is Mannvits Testing & Research Laboratory Manager; under her leadership, Mannvit's testing capacity has increased, making it today one of two major concrete laboratories in Iceland.
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Sveinbjörn Sveinbjörnsson, svsv@mannvit.is
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Civil Engineer, M.Sc. Mannvit Engineering, Iceland
A native of Iceland, Mr. Sveinbjörnsson holds a M.Sc. in Civil Engineering from Lund University, in Sweden. Mr. Sveinbjörnsson has 30 years of experience in research and testing of concrete, mix design, manufacturing, production and conformity control, prospecting for aggregates, technical specification for concrete production and concrete works, supervision and management of concrete construction work, condition survey and damage analysis of concrete structures. He has been involved in concrete issues of some type for all major hydro electric projects and power intensive projects in Iceland since 1979 and has participated in many research projects on concrete. In 1993 he was project manager of preconstruction testing of concrete materials for the Caruachi HE Project in Venezuela (2.5 MW).
He was responsible for the implementation of Mannvit's concrete and materials laboratory in 1994 (at that time Hönnun hf) and was in the coming years responsible for most testing and research work in the concrete field undertaken by the laboratory. |
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| Karsten Iversen, karsten@mannvit.is |
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Civil Engineer, B.Sc. Mannvit Engineering, Iceland
Originally from Denmark, Mr. Iversen holds a B.Sc. in Civil Engineering from the Horsens Teknikum in Denmark. Mr. Iversen has more than 30 years extensive experience in concrete technology, research and production control, having worked for the Icelandic Building Research Institute as concrete production and quality manager for the Sultartangi Hydroelectric Project, administrator of the Línuhönnun material testing laboratory, senior concrete technologist at the Kárahnjúkar Hydroelectric Project and part-time lecturer in concrete technology at the University of Reykjavík.
In recent years, Mr. Iversen he has been involved in implementing production controls for concrete, aggregates and admixtures, as well as mix design and testing of shotcrete and concrete for the powerhouse at the Kárahnjúkar Hydroelectric project, tunneling in the Faroe Islands and hydroelectric powerstation in Greenland.
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Sóley Unnur Einarsdóttir, unnur@mannvit.is
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Geologist, B.Sc. Mannvit Engineering, Iceland
A native of Iceland, Sóley Unnur Einarsdóttir holds a B.Sc. in geology from the University of Iceland. Since joining Mannvit’s Testing & Research Laboratory she has worked on assorted measurement and tests done at the lab as well as attending a seminar on the properties and production of concrete and participating in the Icelandic Concrete Associations conference.
She is responsible for performing majority of the tests for AAR in Mannvits laboratory as well as the field testing site and petrographic analysis of Icelandic aggregates according to Icelandic method. In 2008 she participated in the 13th International Conference on Alkali-Aggregate Reactions in Concrete (ICAAR) in Trondheim where she presented the results of a two year research project at Mannvit. The project objectives were to examine the new test methods presented by RILEM (AAR-3 & AAR-4/1) regarding AAR with Icelandic aggregates, and compare the results with test methods stated in the Icelandic building regulations. She has also participated in RILEM Technical Committee TC 219-ACS, developing test methods for reliable accelerated performance testing for susceptibility to alkali reactions of particular concrete mixes. |
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Guðrún Eva Jóhannsdóttir, gudruneva@mannvit.is
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Geologist, M.Sc. Mannvit Engineering, Iceland
A native of Iceland, Guðrún Jóhannsdóttir holds a M.Sc. in geology from the University of Iceland where, alongside her studies, she was employed as a researcher working on various projects, including grain analysis and sediment carbon content. Since joining Mannvit’s Testing & Research Laboratory, she has worked on the assorted measurements and tests done at the lab as well as attending a seminar on the properties and production of concrete and participating in the Icelandic Concrete Associations conference.
Her involvement includes research into the properties of aggregates, such as grain shape and grain size analyses, particle density measurements, water-soluble chlorine content and petrographic classification as well as assisting with RILEM performance tests.
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Eyþór Bjarnason, eythorb@mannvit.is
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Mason/Laboratory Technician, Mannvit Engineering, Iceland
A native of Iceland, Mr. Bjarnason is an experienced mason and a concrete laboratory technician. He has about ten years experience as a testing and research technician at Mannvit’s Testing & Research Laboratory. His experience is diverse, ranging from sampling in the field, e.g. concrete core drilling, to carrying out most laboratory tests for concrete and concrete aggregates. He is also experienced in mortar and concrete structural assessment and diagnoses. For a period he was engaged in the concrete admixtures business, providing consultation and products to clients in Iceland.
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Sigurjón Árnason, sigurjon@mannvit.is
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Master Carpenter/Laboratory Technician, Mannvit Engineering, Iceland
A native of Iceland, Mr. Árnason is a carpenter and concrete laboratory technician. He has over ten years experience as a testing and research technician at Mannvit Testing & Research Laboratory. His experience is diverse, ranging from sampling in the field to carrying out most laboratory tests for concrete and concrete aggregates. He has also experience in concrete structural assessment and diagnoses. |