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<p>This paper investigates the behaviour of ternary blended self-compacting concrete (SCC) in terms of its strength via non-destructive tests and micro-structural analysis. As admixtures, metakaolin (MK) and high calcium fly ash (HCFA) were employed, with waste marble powder (WMP) serving as filler material. A total of 9 SCC mixes, including a control mix, were tested. Different proportions of MK (5% to 20%) were used as partial replacements for cement. A fixed proportion of 15% of HCFA and 20% of WMP were used as partial replacements of cement and sand, respectively, in all SCC mixes except the control mix. The efficacy of HCFA was determined using a control mix containing only 15% of HCFA as cement replacement. The combination aims to offset the limitations of individual materials through synergistic effects. To evaluate the mechanical and structural performance of the mixes, Modulus of Elasticity (MOE) tests were conducted, followed by non-destructive Rebound Hammer and Ultrasonic Pulse Velocity (UPV) tests at 28 and 90 days. Additionally, the internal matrix development was examined using Scanning Electron Microscopy (SEM). Statistical analysis, including post hoc comparisons with Bonferroni correction, was employed to control Type I errors and ensure reliable pairwise comparisons among mixes. These findings are vital for identifying optimal SCC formulations that offer a balance of strength, durability, and sustainability, while also reducing OPC consumption for enhanced environmental benefits.</p>

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Non-destructive testing and micro-structural analysis of self-compacting concrete using different mineral powder additions in ternary blends

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  • 发表日期：

    2026年5月4日

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  • Peerzada Danish,
  • G. Mohan Ganesh,
  • A. S. Santhi

摘要

This paper investigates the behaviour of ternary blended self-compacting concrete (SCC) in terms of its strength via non-destructive tests and micro-structural analysis. As admixtures, metakaolin (MK) and high calcium fly ash (HCFA) were employed, with waste marble powder (WMP) serving as filler material. A total of 9 SCC mixes, including a control mix, were tested. Different proportions of MK (5% to 20%) were used as partial replacements for cement. A fixed proportion of 15% of HCFA and 20% of WMP were used as partial replacements of cement and sand, respectively, in all SCC mixes except the control mix. The efficacy of HCFA was determined using a control mix containing only 15% of HCFA as cement replacement. The combination aims to offset the limitations of individual materials through synergistic effects. To evaluate the mechanical and structural performance of the mixes, Modulus of Elasticity (MOE) tests were conducted, followed by non-destructive Rebound Hammer and Ultrasonic Pulse Velocity (UPV) tests at 28 and 90 days. Additionally, the internal matrix development was examined using Scanning Electron Microscopy (SEM). Statistical analysis, including post hoc comparisons with Bonferroni correction, was employed to control Type I errors and ensure reliable pairwise comparisons among mixes. These findings are vital for identifying optimal SCC formulations that offer a balance of strength, durability, and sustainability, while also reducing OPC consumption for enhanced environmental benefits.