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<p>Sustainable concrete is a step towards greener and more eco-friendly concrete construction practices, helping to solve global environmental problems. The present study focuses on the bond behavior between steel reinforcement and greener self-compacting concrete, specifically sustainable self-compacting concrete (SUS-SCC). Three SUS-SCC mixtures with different fly ash (FA) to cement replacement levels of [50, 60, and 70% (by mass)] were developed. Twelve full-scale SUS-SCC beams with a cross-section of (305 × 57) mm and a total length of 3048&#xa0;mm were cast and tested using a four-point load test setup. The effect of longitudinal and lateral steel reinforcement ratios in the splice zone was investigated. During testing, ultimate load, deflection, ductility, crack pattern, and mode of failure were recorded. The findings of this study reveal that increasing the lateral steel reinforcement ratio within the splice zone improves the ultimate load and ductility of SUS-SCC beams with a 50% FA to cement replacement ratio, by 17 and 35%, respectively. Decreasing the longitudinal reinforcement ratio from 0.006 to 0.002 for the SUS-SCC beams with a 70% FA to cement replacement ratio resulted in an enhancement of bond strength by approximately 73%.</p>

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Bond behavior of full-scale beams using sustainable self-compacting concrete

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Hayder H. Alghazali,
  • Atheer H. M. Algburi,
  • John J. Myers

摘要

Sustainable concrete is a step towards greener and more eco-friendly concrete construction practices, helping to solve global environmental problems. The present study focuses on the bond behavior between steel reinforcement and greener self-compacting concrete, specifically sustainable self-compacting concrete (SUS-SCC). Three SUS-SCC mixtures with different fly ash (FA) to cement replacement levels of [50, 60, and 70% (by mass)] were developed. Twelve full-scale SUS-SCC beams with a cross-section of (305 × 57) mm and a total length of 3048 mm were cast and tested using a four-point load test setup. The effect of longitudinal and lateral steel reinforcement ratios in the splice zone was investigated. During testing, ultimate load, deflection, ductility, crack pattern, and mode of failure were recorded. The findings of this study reveal that increasing the lateral steel reinforcement ratio within the splice zone improves the ultimate load and ductility of SUS-SCC beams with a 50% FA to cement replacement ratio, by 17 and 35%, respectively. Decreasing the longitudinal reinforcement ratio from 0.006 to 0.002 for the SUS-SCC beams with a 70% FA to cement replacement ratio resulted in an enhancement of bond strength by approximately 73%.