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<p>This study examines the pull-out behavior of expanded polystyrene (EPS) concrete, a material widely used in civil engineering for its lightweight properties and thermal insulation. Although EPS concrete offers potential advantages, its bond strength with reinforcing elements remains a critical area for evaluation. To assess this, pull-out tests were conducted on concrete specimens with varying EPS content (0% to 40% by volume), bar diameters (10&#xa0;mm, 12&#xa0;mm, and 16&#xa0;mm), and embedment depths (length = n × d, where <i>n</i> = 5, 10, or 15). Results showed that higher EPS content reduced bond strength due to decreased density and an altered microstructure, while bar diameter and embedment depth also significantly affected performance. The study’s findings indicate that EPS concrete can be effective in structural applications that require weight reduction. EPS content, bar diameter, and embedment depth should be carefully optimized to ensure adequate bond strength.</p>

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Bond strength evaluation of EPS concrete: failure mechanisms, structural performance, and sustainable construction potential

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Faris Rashied Ahmed,
  • Payam Ismael Abdulrahman,
  • Zahraa Noori Rashied,
  • Ahmed Salih Mohammed

摘要

This study examines the pull-out behavior of expanded polystyrene (EPS) concrete, a material widely used in civil engineering for its lightweight properties and thermal insulation. Although EPS concrete offers potential advantages, its bond strength with reinforcing elements remains a critical area for evaluation. To assess this, pull-out tests were conducted on concrete specimens with varying EPS content (0% to 40% by volume), bar diameters (10 mm, 12 mm, and 16 mm), and embedment depths (length = n × d, where n = 5, 10, or 15). Results showed that higher EPS content reduced bond strength due to decreased density and an altered microstructure, while bar diameter and embedment depth also significantly affected performance. The study’s findings indicate that EPS concrete can be effective in structural applications that require weight reduction. EPS content, bar diameter, and embedment depth should be carefully optimized to ensure adequate bond strength.