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Properties of flowing concrete and self-compacting concrete with high-performance superplasticizer
Flowing concrete (FC) and Self-Compacting concrete (SCC) are currently produced with sufficient amount of superplasticiser. However, it must be emphasized that flowing concrete need not to have the self-compacting capability. FC can also produced by having excess amount of water in the mix without any superplasticiser. Such a mix is prone to high bleeding and segregation. This paper discusses the results of an experimental investigation into the properties of flowing concrete and self-compacting concrete mixes having varying dosage of high-performance superplasticer. The properties investigated are workability, bleeding capacity, segregation potential, compressive and tensile strengths, and drying shrinkage. Flowing concrete had 465 kg/m3 of cement whereas the self-compacting concrete consisted of 350 and 135 kg/m3 of cement and fly ash, respectively. The workability was assessed using slump flow and box-differential height tests. The bleeding capacity for the flowing concrete was higher than that for the self-compacting concrete. The strength of both concrete types was found to increase when vibration was employed at the time of moulding of test specimens and the effect of vibration in strength was significant at later ages. Drying shrinkage was influenced by the mix compositions and superplasticiser dosage.
Properties of flowing concrete and self-compacting concrete with high-performance superplasticizer
Flowing concrete (FC) and Self-Compacting concrete (SCC) are currently produced with sufficient amount of superplasticiser. However, it must be emphasized that flowing concrete need not to have the self-compacting capability. FC can also produced by having excess amount of water in the mix without any superplasticiser. Such a mix is prone to high bleeding and segregation. This paper discusses the results of an experimental investigation into the properties of flowing concrete and self-compacting concrete mixes having varying dosage of high-performance superplasticer. The properties investigated are workability, bleeding capacity, segregation potential, compressive and tensile strengths, and drying shrinkage. Flowing concrete had 465 kg/m3 of cement whereas the self-compacting concrete consisted of 350 and 135 kg/m3 of cement and fly ash, respectively. The workability was assessed using slump flow and box-differential height tests. The bleeding capacity for the flowing concrete was higher than that for the self-compacting concrete. The strength of both concrete types was found to increase when vibration was employed at the time of moulding of test specimens and the effect of vibration in strength was significant at later ages. Drying shrinkage was influenced by the mix compositions and superplasticiser dosage.
Properties of flowing concrete and self-compacting concrete with high-performance superplasticizer
Eigenschaften von Fließbeton und selbstverdichtendem Beton mit Hochleistungs-Superplastifizierer
Ravindrarajah, R.S. (author) / Farrokhzadi, F. (author) / Lahoud, A. (author)
2003
10 Seiten, 11 Bilder, 4 Tabellen, 2 Quellen
Conference paper
English
Bearbeitbarkeit , Dosierung , Druckfestigkeit , Entmischung , experimentelle Untersuchung , Flugasche , Gehalt (Zusammensetzung) , Kies , Konzentrationseinfluss , Korngrößenverteilung , Materialzusammensetzung , Portlandzement , selbstverdichtender Beton , Superplastifizierer , Trockenschwindung , Verfahrensoptimierung , Vibration , Wasserabbinden von Zement , Zugfestigkeit
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