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<p>Construction and global infrastructure depend on cement production. Due to their high carbon emissions, efforts are being made to develop environmentally friendly concrete (EFCs) to mitigate climate change and promote environmental sustainability. This study investigates the use of alccofine (AF) as supplementary cementitious material and M-Sand as fine aggregate in concrete to reduce the environmental impact. In this study, cement is partially substituted with alccofine (AF%) at 0, 5%, 10%, 20%, and 25% and M-Sand is used as fine aggregate throughout the mixes of M25 and M40 grades. Tests on AF% mixes included compressive strength at 3, 7, 14, 28, 56 and 90&#xa0;days of curing and durability tests such as water absorption, acid attack, sulphate attack, ultrasonic pulse velocity, sorptivity, and rapid chloride permeability tests after 28&#xa0;days of curing. Statistical analysis was carried out, as the correlation between CMS and various other performance indicators is substantial when considering longevity. Microstructure using SEM and EDS was analysed to understand the influence on performance. The study concluded that incorporating AF20% and using M-Sand as fine aggregate in concrete mixtures is a promising approach to producing EFCs.</p>

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Microstructural and durability properties of concrete using alccofine as partial replacement of cement and M-Sand as fine aggregate

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Yellinedi Madhavi,
  • R. S. Ravichandran,
  • J. Saravanan,
  • N. Venkata Sairam Kumar

摘要

Construction and global infrastructure depend on cement production. Due to their high carbon emissions, efforts are being made to develop environmentally friendly concrete (EFCs) to mitigate climate change and promote environmental sustainability. This study investigates the use of alccofine (AF) as supplementary cementitious material and M-Sand as fine aggregate in concrete to reduce the environmental impact. In this study, cement is partially substituted with alccofine (AF%) at 0, 5%, 10%, 20%, and 25% and M-Sand is used as fine aggregate throughout the mixes of M25 and M40 grades. Tests on AF% mixes included compressive strength at 3, 7, 14, 28, 56 and 90 days of curing and durability tests such as water absorption, acid attack, sulphate attack, ultrasonic pulse velocity, sorptivity, and rapid chloride permeability tests after 28 days of curing. Statistical analysis was carried out, as the correlation between CMS and various other performance indicators is substantial when considering longevity. Microstructure using SEM and EDS was analysed to understand the influence on performance. The study concluded that incorporating AF20% and using M-Sand as fine aggregate in concrete mixtures is a promising approach to producing EFCs.