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Self-compacting, high strength steel fibre reinforced mortar for pre-cast sheet piles
Self-compacting, fibre reinforced high strength mortars have been developed Delft University of Technology for the construction of sheet piles. Previously, a mix composition was developed which provided the demanded one-day compressive strength of least 60 MPa, a slump flow of more than 600 mm and a funnel time of approximately 10 seconds. The mixture was supplied with 125 kg/m3 straight 13 mm long steel fibres with an aspect ratio of 81, and showed a compressive strength of 120 MPa at the age of 28 days. In this study it was investigated whether aggregate, available at the local Dutch market as sand in large quantities with a maximum diameter of 2 mm, could be used instead of the previously developed laboratory aggregates composed out of separate fractions. The mixtures were tested on their workability and self-compacting ability in the fresh state. The compressive strength, splitting tensile strength, Young's Modulus, flexural strength and fracture energy were determined in the hardened state. The modified mixtures performed equally well compared to the reference one, showing that as long as the maximum diameter is reduced to 2 mm and the total volume of sand plus steel fibres does not exceed 43 % by volume, a mixture fulfilling structural needs can be produced even with different aggregate size distributions.
Self-compacting, high strength steel fibre reinforced mortar for pre-cast sheet piles
Self-compacting, fibre reinforced high strength mortars have been developed Delft University of Technology for the construction of sheet piles. Previously, a mix composition was developed which provided the demanded one-day compressive strength of least 60 MPa, a slump flow of more than 600 mm and a funnel time of approximately 10 seconds. The mixture was supplied with 125 kg/m3 straight 13 mm long steel fibres with an aspect ratio of 81, and showed a compressive strength of 120 MPa at the age of 28 days. In this study it was investigated whether aggregate, available at the local Dutch market as sand in large quantities with a maximum diameter of 2 mm, could be used instead of the previously developed laboratory aggregates composed out of separate fractions. The mixtures were tested on their workability and self-compacting ability in the fresh state. The compressive strength, splitting tensile strength, Young's Modulus, flexural strength and fracture energy were determined in the hardened state. The modified mixtures performed equally well compared to the reference one, showing that as long as the maximum diameter is reduced to 2 mm and the total volume of sand plus steel fibres does not exceed 43 % by volume, a mixture fulfilling structural needs can be produced even with different aggregate size distributions.
Self-compacting, high strength steel fibre reinforced mortar for pre-cast sheet piles
Selbstverdichtender hochfester stahlfaserverstärkter Betonmörtel für die Herstellung von vorgespannten Spundwänden
Lappa, E.S. (author) / Veen, C. van der (author) / Walraven, J.C. (author)
2003
9 Seiten, 7 Bilder, 5 Tabellen, 6 Quellen
Conference paper
English
Baustoff , Betonmörtel , Biegefestigkeit , Biegeprüfung , Bruchenergie , Druckfestigkeit , experimentelle Untersuchung , Korngrößenverteilung , Materialauswahl , Reißfestigkeit , Sand , selbstverdichtender Beton , Spundwand , Stahlfaser , stahlfaserverstärkter Beton , Verarbeitbarkeit , Vergleichsuntersuchung , vorgespanntes Baumaterial , Young-Modul , Zugfestigkeit
SELF-COMPACTING, HIGH STRENGTH STEEL FIBRE REINFORCED MORTAR FOR PRE-CAST SHEET PILES
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