Blar i NTNU Open på forfatter "Wigum, Børge Johannes"
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Alkali Aggregate Reactions (AAR) in concrete. The Norwegian endeavour during more than 3 decades of research
Wigum, Børge Johannes; Lindgård, Jan; De Weerdt, Klaartje; Pedersen, Bård Magne; Rønning, Terje F. (Chapter, 2022)It is now more than 80 years since Alkali Aggregate Reactions (AAR) first were reported as a deleterious deterioration mechanism in concrete. In Norway, AAR was recognised in the late nineteeneighties. Norwegian experience ... -
Changes in cement paste during accelerated mortar bar testing for pyrrhotite containing aggregate
Weerdt, Klaartje de; Bagheri, Mahsa; Lindgård, Jan; Lindstad, Hallvard; Rodrigues, A.; Duchesne, J.; Fecteau, P.-L.; Haugen, Marit Kristin; Danner, Tobias; Wigum, Børge Johannes; Oberhardt, Nikolas; Aasly, Kari Aslaksen; Lothenbach, Barbara (Journal article; Peer reviewed, 2024)The accelerated mortar bar test (AMBT) for pyrrhotite (Fe1-xS) containing aggregates accelerates expansion using two regimes: Phase I, during which Fe1-xS oxidation to iron hydroxide is accelerated by bleach and storage ... -
Classification of Icelandic Aggregates and Effect on Concrete Properties
Guðmundsdóttir, Alexandra Björk (Master thesis, 2020)Tilslag er volummessig den største bestanddelen i betong og har stor påvirkning på betongens egenskaper. Naturlige sand- og grusforekomster er en begrenset ressurs i verden, og det er av avgjørende betydning å kjenne til ... -
Comparison of practice for aggregate use in road construction — results from an international survey
Fladvad, Marit; Aurstad, Joralf; Wigum, Børge Johannes (Chapter, 2017)Conventional flexible pavement structures are constructed using aggregates, in a combination of unbound and bitumen bound materials. Crushed rock aggregates are fundamental for road construction in many countries. This ... -
Determining alkali content in ASR performance-tested concrete
Kermit, Peter Holiman (Master thesis, 2017)Alkali silica reation (ASR) is a common deterioration mechanism of concrete. During ASR, reactive aggregate containing silicon oxide (SiO2) can react with the alkaline fluid in the concrete pores. To test whether a concrete ... -
Effects of Particle Shape on Mechanical Properties of Aggregates
Benediktsson, Stefán (Master thesis, 2015)Aggregates are one of the primary building material used in the world. The durability of construction aggregates will therefore depend upon the quality of aggregate mechanical properties. It is therefore important to ... -
Optimal utilisation of unbound crushed aggregates for road construction
Fladvad, Marit (Doctoral thesis, 2020)Aggregates are construction materials produced from non-renewable rock resources. Because high-quality aggregate resources have limited availability, utilisation of aggregates should be considered carefully to prevent ... -
Outdoor exposure site testing for preventing Alkali-Aggregate Reactivity in concrete – a review
Fournier, Benoit; Lindgård, Jan; Wigum, Børge Johannes; Borchers, Ingmar (Journal article; Peer reviewed, 2018)Alkali-silica reaction (ASR) is a deleterious chemical reaction affecting the durability and service life of concrete structures worldwide. Specifications and recommendations were produced in many countries to ensure that ... -
Produksjon og bruk av overskuddsmasser - Beste praksis og vegen videre
Alnæs, Lisbeth-Ingrid; Danielsen, Svein Willy; Onnela, Tero; Wigum, Børge Johannes; Hoff, Inge; Barbieri, Diego Maria; Mathisen, Lillian Uthus; Fladvad, Marit; Nålsund, Roar (Research report, 2019)Kortreist Stein har hatt en arbeidspakke konsentrert mot Produksjon og anvendelse. Som et utgangspunkt for forskningsaktivitetene, er det det laget detaljerte oversikter over de mest relevante anvendelsesområdene for ... -
Prosessbeskrivelse av et pukkverk - en kostnads- og optimaliseringsstudie
Nesheim, Helene Fromreide (Master thesis, 2018)Hva koster det egentlig å produsere et tonn pukk? Dette er viktig informasjon for en pukkprodusent. Ved hjelp av NTNUs kostnadsmodell er selve knusekostnaden for Franzefoss pukkverk i Vassfjell beregnet. For en tretrinnsknust ... -
Prosessbeskrivelse av et pukkverk - en kostnads- og optimaliseringsstudie
Nesheim, Helene Fromreide (Master thesis, 2018)Hva koster det egentlig å produsere et tonn pukk? Dette er viktig informasjon for en pukkprodusent. Ved hjelp av NTNUs kostnadsmodell er selve knusekostnaden for Franzefoss pukkverk i Vassfjell beregnet. For en tretrinnsknust ... -
Pyrrhotite in concrete aggregate. Introduction to mechanism, damage potential and ongoing research
Lindstad, Hallvard; Lindgård, Jan; Pedersen, Bård Magne; Wigum, Børge Johannes; Aasly, Kurt; Ullnæss, Inger Lise; Oberhardt, Nikolas; De Weerdt, Klaartje (Chapter, 2022)Pyrrhotite is an iron sulfide which when present in concrete aggregate may lead to expansive reactions, cracks and finally disintegration of the concrete. This potential risk when using aggregates containing sulfides in ... -
Rilem activities on alkali-silica reactions: from 1988-2019
Wigum, Børge Johannes; Lindgård, Jan; Sims, Ian; Nixon, Philip J (Journal article; Peer reviewed, 2016)Since 1988, the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (Rilem) technical committees (TCs) have been seeking to establish universally applicable test methods for ... -
The EU "PARTNER" Project - European standard tests to prevent alkali reactions in aggregates: Final results and recommendations
Lindgård, Jan; Nixon, Philip J; Borchers, Ingmar; Schouenborg, Björn; Wigum, Børge Johannes; Haugen, Marit; Akesson, Urban (Journal article; Peer reviewed, 2010)This paper presents the main findings in the EU PARTNER Project (2002–2006) providing the basis for a unified European test approach for evaluating the potential alkali-reactivity of aggregates. The project evaluated the ... -
The Norwegian regulations to mitigate alkali aggregate reactions in concrete
Wigum, Børge Johannes; Lindgård, Jan; Rønning, Terje (Journal article, 2015)Th is paper outlines the historical developments in research on Alkali Aggregate Reactions (AAR) in Norway during the past 25 years. Norwegian regulations have proven to be valuable tools for mitigating AAR. A three step ... -
The RILEM approach to mitigate alkali aggregate reactions (AAR) in concrete
Wigum, Børge Johannes; Lindgård, Jan (Chapter, 2017)Development and assessments of test methods, to avoid deleterious AAR in concrete, have been the focus of three previous RILEM Technical Committees (TC) in the period 1989 to 2014. The 4th RILEM TC on AAR, TC 258-AAA, was ... -
Three decades of international RILEM activities to combat deleterious Alkali-Silica Reactions (ASR) in concrete
Wigum, Børge Johannes; Lindgård, Jan (Journal article; Peer reviewed, 2018)Since 1988, the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM) Technical Committees (TCs) have been seeking to establish universally applicable test methods for ...