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This study investigates the mechanical properties, microstructural characteristics, and environmental impact of Ultra-High-Performance Concrete (UHPC) mixes incorporating supplementary cementitious materials (SCMs) such as ground granulated blast furnace slag (GGBFS) and fly ash. Six trial mixes (TM01-TM06) were analyzed, with a focus on TM04 and TM05, which utilized higher SCM content, resulting in a 40% reduction in cement usage. Scanning Electron Microscopy (SEM) revealed that TM04 exhibited denser N-A-S-H and C-A-S-L gel formations, leading to approximately 25% higher compressive strength compared to TM01. Life cycle assessment (LCA) showed a reduction in carbon emissions (E-CO2) by up to 35% in TM04 and TM05, making them more sustainable alternatives. The enhanced mechanical properties, including a 20–30% improvement in compressive strength and durability, highlight the potential of these mixes for eco-friendly, high-strength applications. This research demonstrates the viability of SCM-based UHPC mixes for reducing environmental impact while maintaining superior structural performance.

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Development of Low-Environmental-Impact Ultra-High-Performance Concrete Incorporating Industrial Wastes

  • 会议论文

  • 发表日期：

    2025年

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  • Keyur Shah,
  • C. D. Modhera,
  • Dhaval Patel

摘要

This study investigates the mechanical properties, microstructural characteristics, and environmental impact of Ultra-High-Performance Concrete (UHPC) mixes incorporating supplementary cementitious materials (SCMs) such as ground granulated blast furnace slag (GGBFS) and fly ash. Six trial mixes (TM01-TM06) were analyzed, with a focus on TM04 and TM05, which utilized higher SCM content, resulting in a 40% reduction in cement usage. Scanning Electron Microscopy (SEM) revealed that TM04 exhibited denser N-A-S-H and C-A-S-L gel formations, leading to approximately 25% higher compressive strength compared to TM01. Life cycle assessment (LCA) showed a reduction in carbon emissions (E-CO2) by up to 35% in TM04 and TM05, making them more sustainable alternatives. The enhanced mechanical properties, including a 20–30% improvement in compressive strength and durability, highlight the potential of these mixes for eco-friendly, high-strength applications. This research demonstrates the viability of SCM-based UHPC mixes for reducing environmental impact while maintaining superior structural performance.