Browsing SINTEF Open by Author "Lindgård, Jan"
Now showing items 1-20 of 20
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Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests
Hemstad, Petter; Zuschlag, Pamela; Kjellemyr, Petter; Lindgård, Jan; Kjellsen, Knut O.; Rønning, Terje; Justnes, Harald; Maciej, Zajac; Haha, Mohsen Ben; Weerdt, Klaartje de (Peer reviewed; Journal article, 2023)Accelerated testing of alkali silica reaction (ASR) in concrete at elevated temperatures of 38 and 60 °C has an unknown impact on the alkali metal distribution in the cement paste. This paper investigates how the alkali ... -
Alkali-silica reaction (ASR)-performance testing: Influence of specimen pre-treatment, exposure conditions and prism size on alkali leaching and prism expansion
Lindgård, Jan; Thomas, Michael D.A.; Sellevold, Erik Johan; Pedersen, Bård; Andiç-Çakır, Özge; Justnes, Harald; Rønning, Terje F. (Journal article; Peer reviewed, 2013)Whether or not concrete prism tests developed for assessment of alkali-silica reactivity of aggregates might be suitable for general ASR performance testing of concrete has been evaluated. This paper discusses how variations ... -
Alkali–silica reaction (ASR)—performance testing: Influence of specimen pre-treatment, exposure conditions and prism size on concrete porosity, moisture state and transport properties
Lindgård, Jan; Sellevold, Erik Johan; Thomas, Michael D.A.; Pedersen, Bård; Justnes, Harald; Rønning, Terje F. (Journal article; Peer reviewed, 2013)Abstract Whether or not concrete prism tests (CPTs) developed for assessment of alkali-silica reactivity of aggregates might be suitable for general ASR performance testing of concrete has been evaluated. This paper ... -
Alkali–silica reactions (ASR): Literature review on parameters influencing laboratory performance testing
Lindgård, Jan; Andiç-Çakır, Özge; Fernandes, Isabel; Rønning, Terje F.; Thomas, Michael D.A. (Journal article; Peer reviewed, 2012)Utilisation of potentially alkali–silica reactive aggregates requires reliable performance tests to evaluate the alkali–silica reactivity of various aggregate combinations, including their alkali threshold dependence on ... -
ASR assessment - concrete prism testing within a regulatory framework
Rønning, Terje F.; Lindgård, Jan; Bremseth, Sigrun Kjær (Journal article; Peer reviewed, 2013)The experience of ASR and ASR testing varies substantially across Europe and outside. Several testing procedures exist but are not always linked to service life records. Also, the European concrete standard on this issue ... -
Betongkonstruksjoners livsløp. "Laboratoriedata for kloridinitiert armeringskorrosjon”
Hynne, Trine; Lindgård, Jan (SINTEF Rapport;STF22 A00732, Research report, 2001)Internasjonalt eksisterer det flere typer prøvingsmetoder for laboratorieprøving av ulike betongers motstand mot kloridinntrenging. I Norge har det på 90-tallet vært vanlig å bruke følgende tre metoder, Kloridmigrasjon (NT ... -
Characterization of amorphous and crystalline ASR products formed in concrete aggregates
Leemann, Andreas; Shi, Zhenguo; Lindgård, Jan (Peer reviewed; Journal article, 2020)Amorphous and crystalline alkali silica reaction (ASR) products formed in aggregates of two different concrete mixtures exposed to the concrete prim test both at 38 °C and 60 °C have been analysed by scanning electron ... -
Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and μXRF
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)Considerable leaching of alkali metals was documented, both in concrete samples exposed to accelerated laboratory testing and field samples. CWE allowed to quantitatively determine the free alkali metal profiles as a ... -
Determining the free alkali metal content in concrete – Case study of an ASR-affected dam
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)In concrete affected by alkali–silica reaction (ASR), aggregates react in the high pH environment and cause deleterious expansion and cracking of the concrete. Leaching of alkali metals from the concrete might therefore ... -
Evaluation of laboratory test methods for assessing the alkali-reactivity potential of aggregates by field site tests
Borchers, I.; Lindgård, Jan; Müller, C. (Peer reviewed; Journal article, 2022)Field site tests were carried out to assess the reliability of the tests developed by RILEM and some regional tests to evaluate the alkali-reactivity potential of aggregates (eight tests were included). One hundred concrete ... -
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 ... -
Prevention of ASR by use of low alkali OPC and silica fume. Field and lab studies from the Maridal culvert and the Storo bridge in Oslo, incl. assessment of residual expansion
Pedersen, Bård; Rodum, Eva; Haugen, Marit Kristin; Lindgård, Jan (Peer reviewed; Journal article, 2021)In 1999, the Maridal concrete culvert was built in Oslo, Norway. Natural aggregates known to be moderately alkali reactive according to laboratory and field experience were used. Field survey combined with microstructural ... -
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 ... -
RILEM TC 219-ACS-P. Literature survey on performance testing
Andiç-Çakır, Özge; Borchers, Ingmar; Broekmans, Maarten; Brouard, Eric; Fernandes, Isabel; Giebson, Colin; Lindgård, Jan; Pedersen, Bård; Pierre, Christian; Rønning, Terje F.; Thomas, Michael D.A.; Wigum, Børge Johannes (COIN Project report;27, Research report, 2011) -
RILEM TC 258-AAA Round Robin Test: Alkali release from aggregates and petrographic analysis. Critical review of the test method AAR-8
Menéndez, Esperanza; Silva, António Santos; Fernandes, Isabel; Duchesne, Josée; Berra, Mario; De Weerdt, Klaartje; Salem, Yasmin; García-Roves, Ricardo; Soares, Dora; Fournier, Benoit; Mangialardi, Teresa; Lindgård, Jan (Peer reviewed; Journal article, 2022)To create an international recommendation concerning the release of alkalis, test method AAR-8 was developed within the scope of RILEM TC 258-AAA activities. The first round robin test was performed using five aggregate ... -
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) -
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 ... -
Uttørkingshastighet for betonggolv
Kvalvik, Marius; Geving, Stig; Lindgård, Jan; Skjølsvold, Ola (Prosjektrapport (SINTEF Byggforsk);32, Research report, 2009)Denne rapporten presenterer resultater fra laboratorieforsøk hvor uttørkingsforløpet etter utstøping for betong med forskjellige sammensetninger er målt. Laboratorieforsøket var todelt, dels et forsøk hvor selvuttørkingseffekten ...