Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dispersion of Fibers in Ultra-High-Performance Concrete
Chen et al cite that ultra-high-performance concrete (UHPC) is an advanced cementitious material with compressive and tensile strengths exceeding 150 and 15 MPa (21,760 and 2180 psi), respectively. UHPC mixtures are generally designed with relatively high dosages of silica fume, high-range water-reducing admixtures (HRWRA or superplasticizer), steel fibers, relatively small concentrations of small-size aggregates, and portland cement typically blended with fly ash or slag cement. Blending of fine and medium-sized fibers provided the greatest promise in terms of producing a desired balance of fresh mixture workability, resistance to fiber balling, and UHPC compressive strength. Scaled-up production of the UHPC mixture reinforced with 1.5% of fine and medium-sized steel fibers by volume at equal proportions confirmed that fiber balling could be controlled when mixing of UHPC was accomplished in a concrete truck.
Dispersion of Fibers in Ultra-High-Performance Concrete
Chen et al cite that ultra-high-performance concrete (UHPC) is an advanced cementitious material with compressive and tensile strengths exceeding 150 and 15 MPa (21,760 and 2180 psi), respectively. UHPC mixtures are generally designed with relatively high dosages of silica fume, high-range water-reducing admixtures (HRWRA or superplasticizer), steel fibers, relatively small concentrations of small-size aggregates, and portland cement typically blended with fly ash or slag cement. Blending of fine and medium-sized fibers provided the greatest promise in terms of producing a desired balance of fresh mixture workability, resistance to fiber balling, and UHPC compressive strength. Scaled-up production of the UHPC mixture reinforced with 1.5% of fine and medium-sized steel fibers by volume at equal proportions confirmed that fiber balling could be controlled when mixing of UHPC was accomplished in a concrete truck.
Dispersion of Fibers in Ultra-High-Performance Concrete
Yang Chen (Autor:in) / Faris Matalkah / Rankothge Ranjith Weerasiri / Anagi M Balachandra / Parviz Soroushian
2017
Aufsatz (Zeitschrift)
Englisch
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