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Effect of Silica Fume Types on the Mechanical Properties of Ultra-High Performance Concrete
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 Title & Authors
Effect of Silica Fume Types on the Mechanical Properties of Ultra-High Performance Concrete
Park, Chun-Jin; Koh, Kyung-Teak; Ahn, Gi-Hong; Han, Min-Cheol;
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Ultra high performance concrete (UHPC) uses large quantities of steel fiber, silica fume, filler and superplasticizer for a low water-to-binder ratio (W/B). Despite of exceptional mechanical performances, UHPC exhibits increased viscosity due to the adoption of silica fume and its fabrication cost is costlier than ordinary concrete because of the use of large quantities of expensive materials. Following, this study evaluates the mechanical properties of 180MPa-UHPC using zirconium silica fume (Zr) instead of silica fume with respect to the quantity and type of superplasticizer (SP) and the size of filler. The results reveal that the Zr-UHPC using W/B of 20%, 100% of Zr, amount of SP-L of 2 to 3% and -filler with steel fiber in 1.5 vol.% can develop better fluidity than the traditional mix composition using silica fume and secure a compressive strength higher than 180 MPa. In addition, the proposed mix composition is shown to enable a reduction of the fabrication cost by 33% compared to traditional UHPC.
Silica fume;Zirconium silica fume;Ultra-high performance concrete;
 Cited by
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