- Chemical admixtures like superplasticisers or stabilising agents are of ever increasing importance for modern concrete technology. They liberate the workability of concrete from its dependency on water content, and thus, open the gate towards innovative and future oriented concrete technologies such as selfcompacting concrete. Meanwhile admixtures have become common practice in concrete technology, but the understanding of these highly complex polymers in the entire concrete system lags far behind their application. Due to its complex time-dependent, multi-phase and multi-scale behaviour, flowable concrete systems are highly complicated and cannot be described comprehensively by simple models. It is therefore extremely challenging to identify the relevant parameters that predominantly control flow phenomena on different size scales, since these may occur on any scale between the nano scale (e.g. superplasticizer adsorption) and macro scale (e.g. grading of the aggregates). The presentChemical admixtures like superplasticisers or stabilising agents are of ever increasing importance for modern concrete technology. They liberate the workability of concrete from its dependency on water content, and thus, open the gate towards innovative and future oriented concrete technologies such as selfcompacting concrete. Meanwhile admixtures have become common practice in concrete technology, but the understanding of these highly complex polymers in the entire concrete system lags far behind their application. Due to its complex time-dependent, multi-phase and multi-scale behaviour, flowable concrete systems are highly complicated and cannot be described comprehensively by simple models. It is therefore extremely challenging to identify the relevant parameters that predominantly control flow phenomena on different size scales, since these may occur on any scale between the nano scale (e.g. superplasticizer adsorption) and macro scale (e.g. grading of the aggregates). The present study discusses fundamental mechanisms at the interface between particle or hydrate surfaces and the fluid phase at a very early stage of concrete formation, and links these effects to macroscopic flow phenomena. Methods are discussed that appear promising interdisciplinary tools for enhancement of the understanding of the relevant interactions that are responsible for the macroscopic flow of flowable concrete.…
MetadatenAutor*innen: | Wolfram SchmidtORCiD, Luciana Weba, Dorothee SilbernaglORCiD, Berta Mota Gassó, Patrick Höhne, Heinz SturmORCiD, Jutta Pauli, Ute Resch-GengerORCiD, Gabriele Steinborn |
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Persönliche Herausgeber*innen: | Kamal Henry Khayat |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
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Veröffentlichungsform: | Graue Literatur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Flowing toward Sustainability |
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Jahr der Erstveröffentlichung: | 2016 |
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Erste Seite: | 245 |
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Letzte Seite: | 254 |
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DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
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| Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
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| Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau |
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Freie Schlagwörter: | Adsorption; Analytics; Hydration; Polycarboxylate ether; Rheology |
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Veranstaltung: | 8th International RILEM Symposium on Self-Compacting Concrete |
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Veranstaltungsort: | Washington, D.C., USA |
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Beginndatum der Veranstaltung: | 15.05.2016 |
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Enddatum der Veranstaltung: | 18.05.2016 |
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Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
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Datum der Freischaltung: | 18.07.2016 |
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Referierte Publikation: | Nein |
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