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Global warming compels construction sectors to think about eco-friendly building materials like geopolymer concrete (GPC) because of its ability to incorporate waste by-products against cement which is responsible for the reduction in the ozone layer due to the carbon dioxide emission in its production. Added advantages can be achieved if GPC is made self-compacting, called self-compacting geopolymer concrete (SCGC). In SCGC production, fine aggregate takes around 55–60% of the total aggregate volume. To overcome landfill and disposal issues of industrial solid wastes, their usage in the construction field has been encouraged. Ferrochrome slag (FCS) as a waste material is produced about 12–16 million tons annually. Thus for sustainable production, the current project involves natural fine aggregate (NFA) replacement with FCS by 0% (control mix), 25, 50, 75, and 100% to prepare ground granulated blast furnace slag (GGBFS)-fly ash (FA)-based SCGC cured under ambient temperature curing. Another control SCGC mix was prepared with only GGBFS and NFA, free from FA and FCS to check the effect of FA addition in GGBFS-based SCGC. All six SCGC mix designs are prepared with four consistent mix factors: sodium hydroxide (SH) of 12 M concentration, sodium silicate (SS) to SH ratio of 2.5, superplasticizer (SP) dosage of 7%, and extra water (EW) of 24%. The workability of the developed fresh concrete is assessed through the filling ability (FLA) checks such as slump flow, T50cm slump flow, and V-funnel tests; passing ability (PA) checks like L-box and J-ring tests; along with segregation resistance (SR) check like V-funnel at T5minutes test. The GGBFS-FA-based SCGC is perceived to be less workable than the GGBFS-based SCGC. Further, the FCS replacement up to 25% yields a better workable mix compared to all other replacements, and a complete replacement of NFA with FCS is not recommended for the GGBFS-FA-based SCGC. It is also realized that a limited workable SCGC mix can be prepared with waste material around 45% of the total concrete volume.

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Behavior of Ferrochrome Sand in the Fresh Characteristics of GGBFS-Fly Ash-Based Self-compacting Geopolymer Concrete

  • 会议论文

  • 发表日期：

    2025年

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  • Deepak Ranjan Mohapatra,
  • Soumyaranjan Panda,
  • Raghvendra Sahu,
  • Saubhagya Kumar Panigrahi

摘要

Global warming compels construction sectors to think about eco-friendly building materials like geopolymer concrete (GPC) because of its ability to incorporate waste by-products against cement which is responsible for the reduction in the ozone layer due to the carbon dioxide emission in its production. Added advantages can be achieved if GPC is made self-compacting, called self-compacting geopolymer concrete (SCGC). In SCGC production, fine aggregate takes around 55–60% of the total aggregate volume. To overcome landfill and disposal issues of industrial solid wastes, their usage in the construction field has been encouraged. Ferrochrome slag (FCS) as a waste material is produced about 12–16 million tons annually. Thus for sustainable production, the current project involves natural fine aggregate (NFA) replacement with FCS by 0% (control mix), 25, 50, 75, and 100% to prepare ground granulated blast furnace slag (GGBFS)-fly ash (FA)-based SCGC cured under ambient temperature curing. Another control SCGC mix was prepared with only GGBFS and NFA, free from FA and FCS to check the effect of FA addition in GGBFS-based SCGC. All six SCGC mix designs are prepared with four consistent mix factors: sodium hydroxide (SH) of 12 M concentration, sodium silicate (SS) to SH ratio of 2.5, superplasticizer (SP) dosage of 7%, and extra water (EW) of 24%. The workability of the developed fresh concrete is assessed through the filling ability (FLA) checks such as slump flow, T50cm slump flow, and V-funnel tests; passing ability (PA) checks like L-box and J-ring tests; along with segregation resistance (SR) check like V-funnel at T5minutes test. The GGBFS-FA-based SCGC is perceived to be less workable than the GGBFS-based SCGC. Further, the FCS replacement up to 25% yields a better workable mix compared to all other replacements, and a complete replacement of NFA with FCS is not recommended for the GGBFS-FA-based SCGC. It is also realized that a limited workable SCGC mix can be prepared with waste material around 45% of the total concrete volume.