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<p>This study develops polypropylene (PP) fiber–reinforced self-compacting concrete (FRSCC) incorporating fly ash and ground granulated blast-furnace slag (GGBS) to reduce the dependency on cement while enhancing performance. Four FRSCC mixtures and one conventional self-compacting concrete (SCC) control were produced. For all FRSCC mixtures, a constant water-to-binder ratio of 0.34 was adopted, with 25% replacement of CEM I by fly ash, PP fibers at 0.1% (by volume), high-range water-reducing admixture (HRWRA) at 1.5%, and viscosity-modifying admixture (VMA) at 0.65%. The principal variable was the GGBS replacement level in CEM I (0, 10, 15, and 20%), with the fly ash content held constant. Fresh properties were evaluated using the slump flow, T<sub>500</sub>, V-funnel, and J-ring tests, and all mixtures met the EFNARC (2005) and ACI 237R criteria, confirming adequate filling ability, passing ability, and stability. Hardened performance was assessed through compressive strength, splitting tensile strength, and water absorption tests. Among the FRSCC mixtures, the 15% GGBS mix (G15) achieved the highest 28-day compressive strength (39.4&#xa0;MPa) and splitting tensile strength (4.8&#xa0;MPa). All mixtures gave acceptable durability indicators, with water absorption and volume of permeable voids (VPV) remaining below 5% and 11%, respectively. Overall, a 15% GGBS replacement level, combined with 25% fly ash and 0.1% PP fibers, delivered the most balanced fresh and hardened properties for sustainable FRSCC.</p>

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Synergy of ternary binders and polypropylene fibers in self-compacting concrete

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Tahsin Mahmud,
  • Labiba Mostafa,
  • G. M. Sadiqul Islam

摘要

This study develops polypropylene (PP) fiber–reinforced self-compacting concrete (FRSCC) incorporating fly ash and ground granulated blast-furnace slag (GGBS) to reduce the dependency on cement while enhancing performance. Four FRSCC mixtures and one conventional self-compacting concrete (SCC) control were produced. For all FRSCC mixtures, a constant water-to-binder ratio of 0.34 was adopted, with 25% replacement of CEM I by fly ash, PP fibers at 0.1% (by volume), high-range water-reducing admixture (HRWRA) at 1.5%, and viscosity-modifying admixture (VMA) at 0.65%. The principal variable was the GGBS replacement level in CEM I (0, 10, 15, and 20%), with the fly ash content held constant. Fresh properties were evaluated using the slump flow, T500, V-funnel, and J-ring tests, and all mixtures met the EFNARC (2005) and ACI 237R criteria, confirming adequate filling ability, passing ability, and stability. Hardened performance was assessed through compressive strength, splitting tensile strength, and water absorption tests. Among the FRSCC mixtures, the 15% GGBS mix (G15) achieved the highest 28-day compressive strength (39.4 MPa) and splitting tensile strength (4.8 MPa). All mixtures gave acceptable durability indicators, with water absorption and volume of permeable voids (VPV) remaining below 5% and 11%, respectively. Overall, a 15% GGBS replacement level, combined with 25% fly ash and 0.1% PP fibers, delivered the most balanced fresh and hardened properties for sustainable FRSCC.