Browsing NTNU Open by Author "Lindgård, Jan"
Now showing items 21-28 of 28
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Relative humidity measurements in concrete
Hepsøe, Per Martin (Master thesis, 2017)A commonly used way to monitor the concrete s moisture condition is to measure Relative humidity (RH). Measuring relative RH in concrete, and understanding the underlying mechanisms are complex tasks. Field measurements ... -
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 ... -
Sample preparation and the pilot testing of an oxygen consumption test that assesses the extent of pyrrhotite oxidation in sulfide-bearing concrete aggregates
Muhyiddin, Yahya (Master thesis, 2023)Når betongtilslag inneholder magnetkis, et mineral som består av jern og svovel, kan dette føre til betydelige skader på betongkonstruksjoner. I 2016 ble en kanadisk testprosedyre introdusert. Målet med denne testprosedyren ... -
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 ... -
Tilstandsvurdering av betongbruer med Alkalireaksjoner: Gjennomgang og evaluering av Tromsøbrua.
Hansen, Ole Listad (Master thesis, 2023)Tromsøbrua binder Tromsøya og fastlandet sammen og er en del av fylkesveg 862. Den er 1016m lang, ble ferdigstilt i 1960 og er den første frittfrembyggbrua som ble bygget i Norge. Brua består av 3 forskjellige konstruksjonstyper. ...