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Effects of superplasticizer and viscosity-modifying agent on fresh concrete performance of SCC at varied ambient temperatures

  • Varying ambient temperatures in plants or on construction sites during casting of SCC can cause serious problems affecting the fresh concrete performances, such as rheological properties and setting time, with consequences for the hardened properties in the structure. By sensible choices of the components, the robustness of SCC mixtures against temperature variations can be improved. However, this aspect has not been the focus of intensive research yet. In this study the effects of varied ambient temperatures on the early performance of differently composed SCC mixtures are investigated, with emphasis on changes in rheology, early deformations, heat evolution and setting. Focus is placed on the study of the influence of the polycarboxylate ether molecule type as well as different viscositymodifying agents on the temperature robustness. Effects on the relevance for practical concrete applications are evaluated, which will provide a reliable framework of possible actions on theVarying ambient temperatures in plants or on construction sites during casting of SCC can cause serious problems affecting the fresh concrete performances, such as rheological properties and setting time, with consequences for the hardened properties in the structure. By sensible choices of the components, the robustness of SCC mixtures against temperature variations can be improved. However, this aspect has not been the focus of intensive research yet. In this study the effects of varied ambient temperatures on the early performance of differently composed SCC mixtures are investigated, with emphasis on changes in rheology, early deformations, heat evolution and setting. Focus is placed on the study of the influence of the polycarboxylate ether molecule type as well as different viscositymodifying agents on the temperature robustness. Effects on the relevance for practical concrete applications are evaluated, which will provide a reliable framework of possible actions on the appropriate use of admixtures for SCC.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Wolfram Schmidt, J. Brouwers, Hans-Carsten Kühne, Birgit Meng
Persönliche Herausgeber/innen:K. H. Khayat, D. Feys
Dokumenttyp:Beitrag zu einem Sammelband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):SCC 2010 - 6th International RILEM Symposium on self-compacting concrete / 4th North American conference on the design and use of SCC - Desgin, Production and Placement of self-consolidating concrete (Proceedings)
Jahr der Erstveröffentlichung:2010
Herausgeber (Institution):RILEM
Verlag:Springer
Jahrgang/Band:1
Ausgabe/Heft:2
Erste Seite:65
Letzte Seite:77
Freie Schlagwörter:Modified starch; Polycarboxylate; Rheology; Self-compacting concrete; Temperature; Viscosity; Yield stress
Veranstaltung:SCC 2010 - 6th International RILEM Symposium on self-compacting concrete / 4th North American conference on the design and use of SCC - Desgin, Production and Placement of self-consolidating concrete
Veranstaltungsort:Montreal, Canada
Beginndatum der Veranstaltung:2010-09-26
Enddatum der Veranstaltung:2010-09-29
DOI:https://doi.org/10.1007/978-90-481-9664-7_6
ISBN:978-90-481-9663-0
Bemerkung:
Serientitel: RILEM bookseries – Series title: RILEM bookseries
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein