Effects of curing type, silica fume fineness, and fiber length on the mechanical properties and impact resistance of UHPFRC

The effects of silica fume fineness and fiber aspect ratio on the compressive strength and impact resistance of ultra high-performance fiber-reinforced concrete (UHPFRC) are investigated experimentally. To this end, UHPFRC mixtures are manufactured by combining silica fumes with different fineness (...

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Published in:Results in physics 2016, Vol.6, p.664-674
Main Author: Arel, Hasan Şahan
Format: Article
Language:English
Subjects:
Curing
Fiber
Fineness
Mechanical properties
UHPFRC
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description The effects of silica fume fineness and fiber aspect ratio on the compressive strength and impact resistance of ultra high-performance fiber-reinforced concrete (UHPFRC) are investigated experimentally. To this end, UHPFRC mixtures are manufactured by combining silica fumes with different fineness (specific surface areas: 17,200, 20,000, and 27,600m2/kg) and hooked-end steel fibers with various aspect ratios (lengths: 8, 13, and 16mm). The samples are subjected to standard curing, steam curing, and hot-water curing. Compressive strength tests are conducted after 7-, 28-, 56-, and 90-day curing periods, and an impact resistance experiment is performed after the 90th day. A steam-cured mixture of silica fumes with a specific surface area of 27,600m2/kg and 16-mm-long fibers produce better results than the other mixtures in terms of mechanical properties. Moreover, impact resistance increases with the fiber aspect ratio.
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subjects Curing
Fiber
Fineness
Mechanical properties
UHPFRC
title Effects of curing type, silica fume fineness, and fiber length on the mechanical properties and impact resistance of UHPFRC
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