Effects of the characteristics of high range water reducing agents and the water to powder ratio on rheological and setting behavior of self-consolidating concrete
- To design robust self-consolidating concrete (SCC) for various environmental conditions, it is essential to understand the relevant mechanisms that control the flow performance. This paper depicts how high range water reducing agents (HRWRAs) interact with clinker and hydration phases, and it discusses the important role of the charge density of polycarboxylic HRWRAs in the way the rheology is affected. Based on the rheometric investigations on SCC mixture compositions with different water to powder ratios (w/p) and observations of their pastes' Vicat setting times, the study shows that increasing charge densities of the HRWRA and decreasing w/p reduce the flow retention and have lesser retarding effect on the setting. Based on the test results and discussions optimization procedures for the mixture composition and the HRWRA modification are suggested to achieve optimized performance for varying environmental situations and highest robustness for specific conditions.
Autor*innen: | Wolfram SchmidtORCiD, H.J.H. Brouwers, Hans-Carsten KühneORCiD, Birgit MengORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Advances in civil engineering materials |
Jahr der Erstveröffentlichung: | 2014 |
Verlag: | ASTM International |
Verlagsort: | West Conshohocken, Pa., USA |
Jahrgang/Band: | 3 |
Ausgabe/Heft: | 2 |
Erste Seite: | 1 |
Letzte Seite: | 15 |
Freie Schlagwörter: | HRWRA; Polycarboxylate; Rheology; Robustness; Self-consolidating concrete |
DOI: | 10.1520/ACEM20130094 |
ISSN: | 2165-3984 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 20.03.2014 |