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Global warming is escalating due to the extensive use of cement and natural fine aggregates (NFA) in conventional concrete production. Concurrently, steel industries generate significant waste, contributing to environmental imbalance. Addressing these issues requires the utilization of such wastes in a suitable form of concrete, i.e. geopolymer concrete (GPC) production. Non-destructive tests, such as rebound hammer (RH) and ultrasonic pulse velocity (UPV) tests, are crucial in assessing the quality and strength of in-situ concrete without causing damage. This study investigates the relationship between the destructive and non-destructive properties of newly developed GPC with a high volume of steel slag. The proposed GPC incorporates ground granulated blast furnace slag (GGBS) and granulated blast furnace slag (GBFS) from steel industries. Five GPC concrete mixes are prepared, containing a fixed molarity of 10 M and a 50:50 ratio of FA: GGBS as a binder, with varying percentages (0%, 25%, 50%, 75%, and 100%) of GBFS as the replacement of NFA. The experimental results revealed that GBFS content increases, RH and UPV values increase up to 50%, replacing NFA, and after that, the strength decreases. The mix of G50S50 demonstrates comparable better performance to conventional concrete, achieving significant reductions in cement and NFA usage. The present study underscores the potential for producing sustainable geopolymer concrete by integrating industrial waste, addressing environmental concerns and promoting eco-friendly construction practices.

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Performance Evaluation of Alkali-Activated High-Volume Steel Slag Based Geopolymer Concrete with Non-destructive Approaches

  • 会议论文

  • 发表日期：

    2025年

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  • Siba Sankar Chanda,
  • Shyamal Guchhait

摘要

Global warming is escalating due to the extensive use of cement and natural fine aggregates (NFA) in conventional concrete production. Concurrently, steel industries generate significant waste, contributing to environmental imbalance. Addressing these issues requires the utilization of such wastes in a suitable form of concrete, i.e. geopolymer concrete (GPC) production. Non-destructive tests, such as rebound hammer (RH) and ultrasonic pulse velocity (UPV) tests, are crucial in assessing the quality and strength of in-situ concrete without causing damage. This study investigates the relationship between the destructive and non-destructive properties of newly developed GPC with a high volume of steel slag. The proposed GPC incorporates ground granulated blast furnace slag (GGBS) and granulated blast furnace slag (GBFS) from steel industries. Five GPC concrete mixes are prepared, containing a fixed molarity of 10 M and a 50:50 ratio of FA: GGBS as a binder, with varying percentages (0%, 25%, 50%, 75%, and 100%) of GBFS as the replacement of NFA. The experimental results revealed that GBFS content increases, RH and UPV values increase up to 50%, replacing NFA, and after that, the strength decreases. The mix of G50S50 demonstrates comparable better performance to conventional concrete, achieving significant reductions in cement and NFA usage. The present study underscores the potential for producing sustainable geopolymer concrete by integrating industrial waste, addressing environmental concerns and promoting eco-friendly construction practices.