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Article Published In Vol.1 (Nov-Dec-2013)

Survey on the impact of steel fiber and silica fume on the properties of self-compacting concrete

Pages : 161-165

Author : Ahmed Fathi Mohamed Salih , Nasir Shafiq , M. F. Nuruddin and Ali Elheber

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Utilizing the massive advantages provide by self-compacting concrete (SCC), there’s negative aspects of SCC such as ductility problem as well as the high cost of its constituted materials. Steel fiber with silica fume can solve this problem by increase their ductility besides that will decrease the cost of SCC by replacing cement contents. Many researches find that a few similar studies ended round the characteristics of steel fiber self-compacting concrete (SFRSCC) that consists of silica fume. This paper checks both fresh and mechanical characteristics of SFRSCC with silica fume ; a fresh characteristics where slump flow , slump T50 and V-funnel while the mechanical characteristics were compressive strength , ultrasonic pulse velocity (UPV) and elastic modulus of concrete samples. The experimental results prove that steel fiber can improve the mechanical characteristics since the silica fume in the entire hybrids may possibly adapt the fiber dispersion and strength losses attributable to fibers, and improve strength and the bond between fiber and matrix with dense calcium silicate-hydrate gel in SFRSCC. The result forecasts by linear mathematical models are found in great agreement with experimental results.

Keyword: self-compacting concrete, silica fume, steel fiber and fresh state.



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