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This study investigates the properties of mortar and concrete using sea sand as fine aggregate, focusing on the effects of fly ash (FA) and granulated blast furnace slag (GBFS) as supplementary cementitious materials (SCM), along with corrosion inhibitors. Sodium nitrite had minimal impact on the flowability of cement mortar, while chromate-based inhibitors significantly reduced it. Compressive strength tests showed that mortar samples without corrosion inhibitors had the highest strength, whereas those with chromate-based inhibitors had significantly lower strength. Surface resistivity measurements indicated that samples with 25% FA and 25% GBFS had significantly higher resistivity, suggesting improved resistance to chloride ion penetration and enhanced durability. These findings demonstrate the effectiveness of FA and slag in improving concrete performance and durability in marine environments. The study highlights the importance of careful admixture and corrosion inhibitor selection in optimizing sea sand concrete properties, promoting sustainable construction practices using locally available resources.

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Mechanical Properties of Sea Sand Concrete Incorporating Corrosion Inhibitors and Supplementary Cementitious Materials

  • 会议论文

  • 发表日期：

    2025年

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  • Vu Thi Hong Nhung,
  • Nguyen Ngoc Tri Huynh,
  • Nguyen Khanh Son

摘要

This study investigates the properties of mortar and concrete using sea sand as fine aggregate, focusing on the effects of fly ash (FA) and granulated blast furnace slag (GBFS) as supplementary cementitious materials (SCM), along with corrosion inhibitors. Sodium nitrite had minimal impact on the flowability of cement mortar, while chromate-based inhibitors significantly reduced it. Compressive strength tests showed that mortar samples without corrosion inhibitors had the highest strength, whereas those with chromate-based inhibitors had significantly lower strength. Surface resistivity measurements indicated that samples with 25% FA and 25% GBFS had significantly higher resistivity, suggesting improved resistance to chloride ion penetration and enhanced durability. These findings demonstrate the effectiveness of FA and slag in improving concrete performance and durability in marine environments. The study highlights the importance of careful admixture and corrosion inhibitor selection in optimizing sea sand concrete properties, promoting sustainable construction practices using locally available resources.