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Effect of Silica Fume Types on the Mechanical Properties of Ultra-High Performance Concrete

실리카퓸 종류가 초고성능 콘크리트의 공학적 특성에 미치는 영향

  • Received : 2015.09.17
  • Accepted : 2015.09.25
  • Published : 2015.09.30

Abstract

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 $4{\mu}m$-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.

Keywords

Silica fume;Zirconium silica fume;Ultra-high performance concrete

References

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Cited by

  1. Workability and Strength Characteristics of Lathe Scrap Reinforced Cementitious Composites vol.20, pp.6, 2016, https://doi.org/10.11112/jksmi.2016.20.6.040

Acknowledgement

Supported by : 국토교통과학기술진흥원