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Volume 20 Issue 2
Feb.  2013
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Fareed Ahmed Memon, Muhd Fadhil Nuruddin, and Nasir Shafiq, Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete, Int. J. Miner. Metall. Mater., 20(2013), No. 2, pp. 205-213. https://doi.org/10.1007/s12613-013-0714-7
Cite this article as:
Fareed Ahmed Memon, Muhd Fadhil Nuruddin, and Nasir Shafiq, Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete, Int. J. Miner. Metall. Mater., 20(2013), No. 2, pp. 205-213. https://doi.org/10.1007/s12613-013-0714-7
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Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete

  • 通讯作者:

    Fareed Ahmed Memon    E-mail: engrfam@gmail.com

  • The effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete (SCGC) was investigated in this paper. The work focused on the concrete mixes with a fixed water-to-geopolymer solid (W/Gs) ratio of 0.33 by mass and a constant total binder content of 400 kg/m3. The mass fractions of silica fume that replaced fly ash in this research were 0wt%, 5wt%, 10wt%, and 15wt%. The workability-related fresh properties of SCGC were assessed through slump flow, V-funnel, and L-box test methods. Hardened concrete tests were limited to compressive, splitting tensile and flexural strengths, all of which were measured at the age of 1, 7, and 28 d after 48-h oven curing. The results indicate that the addition of silica fume as a partial replacement of fly ash results in the loss of workability; nevertheless, the mechanical properties of hardened SCGC are significantly improved by incorporating silica fume, especially up to 10wt%. Applying this percentage of silica fume results in 4.3% reduction in the slump flow; however, it increases the compressive strength by 6.9%, tensile strength by 12.8% and flexural strength by 11.5%.
  • Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete

    + Author Affiliations
    • The effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete (SCGC) was investigated in this paper. The work focused on the concrete mixes with a fixed water-to-geopolymer solid (W/Gs) ratio of 0.33 by mass and a constant total binder content of 400 kg/m3. The mass fractions of silica fume that replaced fly ash in this research were 0wt%, 5wt%, 10wt%, and 15wt%. The workability-related fresh properties of SCGC were assessed through slump flow, V-funnel, and L-box test methods. Hardened concrete tests were limited to compressive, splitting tensile and flexural strengths, all of which were measured at the age of 1, 7, and 28 d after 48-h oven curing. The results indicate that the addition of silica fume as a partial replacement of fly ash results in the loss of workability; nevertheless, the mechanical properties of hardened SCGC are significantly improved by incorporating silica fume, especially up to 10wt%. Applying this percentage of silica fume results in 4.3% reduction in the slump flow; however, it increases the compressive strength by 6.9%, tensile strength by 12.8% and flexural strength by 11.5%.
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