Water demand of amorphous nano silica and its impact on the workability of cement paste
- This paper addresses the characterization of six different amorphous silica samples with respect to their application in cement paste. Different mixes are compared and analyzed using the mini spread-flow test. Also the granular properties, different void fraction states of packing and distribution moduli q are analyzed and compared using a mix design tool. A deformation coefficient is derived from the spread-flow test, which correlates with the value of specific surface area computed from the particle size distribution, and intrinsic density of the samples. Finally, the thickness of a constant water layer of 25 nm around the particles is computed at the onset of flowing. The granular analysis demonstrated that it is possible to decrease the water demand of the cement paste when nanoparticles are added and the resulting grading follows the modified Andreasen and Andersen curve (q = 0.5), and the concentration of nano silica is less than 5% bwoc.
MetadatenAutor*innen: | G. Quercia, Götz HüskenORCiD, H.J.H. Brouwers |
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Dokumenttyp: | Zeitschriftenartikel |
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Veröffentlichungsform: | Verlagsliteratur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Cement and concrete research |
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Jahr der Erstveröffentlichung: | 2012 |
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Verlag: | Pergamon Press |
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Verlagsort: | New York, NY |
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Jahrgang/Band: | 42 |
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Ausgabe/Heft: | 2 |
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Erste Seite: | 344 |
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Letzte Seite: | 357 |
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Freie Schlagwörter: | Nano silica (D); Particle size distribution (B); Surface area (B); Water demand (A); Workability (A) |
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DOI: | 10.1016/j.cemconres.2011.10.008 |
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ISSN: | 0008-8846 |
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ISSN: | 1873-3948 |
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Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
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Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
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Datum der Freischaltung: | 19.02.2016 |
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Referierte Publikation: | Ja |
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Datum der Eintragung als referierte Publikation: | 25.06.2012 |
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