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Foam concrete (FC) is widely recognized for its lightweight nature and thermal insulation capabilities, but its use is limited in terms of durability and water penetration. The study investigates the performance enhancement of FC using coarse aggregate (CA) and silica fume (SF), to enhance its durability. The durability properties such as Water absorption, volume of permeable voids (VPV), sorptivity, thermal conductivity, and resistance to chemical assaults (sulfuric acid, sodium sulfate, and sodium chloride) were all tested at 28, 56, and 90-day curing intervals. The results showed that adding CA and SF greatly reduced water absorption, sorptivity, and VPV by 67%, 21.73%, and 36.5%, respectively, while dramatically increasing acid, sulfate, and chloride resistance by 18.66%, 28.88%, and 56%. The optimized mix (3F2C50A10S) had the lowest strength loss and the best thermal conductivity, indicating a denser microstructure, as confirmed by SEM examination. These enhancements illustrate the ability of CA and SF to produce foam concrete that meets both structural and environmental performance standards.

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Optimizing Foam Concrete Performance: Enhancing Sustainability Through Coarse Aggregate and Silica Fume Incorporation

  • 会议论文

  • 发表日期：

    2025年

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  • Y. Sivananda Reddy,
  • S. Anandh,
  • S. Sindhu Nachiar

摘要

Foam concrete (FC) is widely recognized for its lightweight nature and thermal insulation capabilities, but its use is limited in terms of durability and water penetration. The study investigates the performance enhancement of FC using coarse aggregate (CA) and silica fume (SF), to enhance its durability. The durability properties such as Water absorption, volume of permeable voids (VPV), sorptivity, thermal conductivity, and resistance to chemical assaults (sulfuric acid, sodium sulfate, and sodium chloride) were all tested at 28, 56, and 90-day curing intervals. The results showed that adding CA and SF greatly reduced water absorption, sorptivity, and VPV by 67%, 21.73%, and 36.5%, respectively, while dramatically increasing acid, sulfate, and chloride resistance by 18.66%, 28.88%, and 56%. The optimized mix (3F2C50A10S) had the lowest strength loss and the best thermal conductivity, indicating a denser microstructure, as confirmed by SEM examination. These enhancements illustrate the ability of CA and SF to produce foam concrete that meets both structural and environmental performance standards.