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Alkali-Silica Reaction in concrete pavements considering traffic and de-icing agents

  • In concrete pavements, damages occurred which are related to an Alkali-Silica-Reaction (ASR). Although the background for such an ASR has been studied extensively, special conditions in pavements increase this reaction significantly. These are especially the superposition of microstructural degradation caused by cyclic loading with an external alkali supply. Previous investigations of ASR focused mainly on the material itself (aggregates, cements, assessment of the concrete) while these special circumstances have not been considered. Concrete pavements are subjected to cyclic loadings by traffic and climate changes. Within cooperative research projects the different interdependent influencing factors for a damaging ASR in concrete pavements are studied by experiments as well as by numeric modelling. On the micro-level the ASR-related processes within the aggregate, such as gel-formation or ion-transport, are investigated. On the meso-level, the project focuses on the characterizationIn concrete pavements, damages occurred which are related to an Alkali-Silica-Reaction (ASR). Although the background for such an ASR has been studied extensively, special conditions in pavements increase this reaction significantly. These are especially the superposition of microstructural degradation caused by cyclic loading with an external alkali supply. Previous investigations of ASR focused mainly on the material itself (aggregates, cements, assessment of the concrete) while these special circumstances have not been considered. Concrete pavements are subjected to cyclic loadings by traffic and climate changes. Within cooperative research projects the different interdependent influencing factors for a damaging ASR in concrete pavements are studied by experiments as well as by numeric modelling. On the micro-level the ASR-related processes within the aggregate, such as gel-formation or ion-transport, are investigated. On the meso-level, the project focuses on the characterization of degradation effects in the concrete microstructure due to cyclic loading. Further, special attention is paid to the transport behavior of fluids in such pre-damaged concrete structures with and without the effect of overrunning tires as well as the impact on the ASR itself. Finally, on the macro-level the risk of an ASR-damage is assessed.zeige mehrzeige weniger

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  • Breitenbuecher et al. Alkali-Silica Reaction in concrete pavements considering traffic and de-icing agents.pdf
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Metadaten
Autor*innen:R. Breitenbücher, R. Przondziono, Birgit MengORCiD, Enno Krütt, Frank WeiseORCiD
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):13th International Symposium on Concrete Roads
Jahr der Erstveröffentlichung:2018
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.1 Baustoffe
Erste Seite:1
Letzte Seite:15
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau
Freie Schlagwörter:Alkali-Silica Reaction; Cyclic loading; Degradation; Fluid transport; Traffic
Themenfelder/Aktivitätsfelder der BAM:Infrastruktur
Material
Material / Degradation von Werkstoffen
Veranstaltung:13th International Symposium on Concrete Roads
Veranstaltungsort:Berlin, Germany
Beginndatum der Veranstaltung:19.06.2018
Enddatum der Veranstaltung:22.06.2018
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:25.10.2018
Referierte Publikation:Nein
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