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<p>This study provides a comprehensive overview of the material and mechanical properties of lightweight fiber-reinforced cementitious composites (L-FRCCs), focusing on their classification as ultra-high-strength lightweight fiber-reinforced cementitious composites (UL-FRCCs). The L-FRCCs exhibit a density of 1440–2150&#xa0;kg/m<sup>3</sup>, thermal coefficient of 0.22–0.33 W/mK, compressive strength of 45–145&#xa0;MPa, and flexural strength of 4.3–37.5&#xa0;MPa. The strength of the L-FRCCs increases linearly with matrix strength. Specifically, L-FRCCs with compressive strength &gt; 100&#xa0;MPa, flexural strength &lt; 15&#xa0;MPa, density &lt; 1950&#xa0;kg/m<sup>3</sup>, and thermal conductivity &lt; 0.5 W/mK can be classified as UL-FRCCs. Pearson correlation analysis reveals that the structural efficiency (SE) of L-FRCCs increases with increasing matrix strength, fiber volume content, and reinforcing index; however, it decreases with an increase in the lightweight aggregate (LWA) ratio. For UL-FRCCs to achieve optimal SE, the LWAs should possess a crushing strength &gt; 70&#xa0;MPa and specific gravity &lt; 0.5. Additionally, incorporating straight steel fibers at volumes &lt; 2.5% is recommended to achieve strengths &gt; 100&#xa0;MPa. Compared to nonmetallic fibers such as polymeric fibers, steel fibers offer superior SE for flexural strength, despite their tendency to reduce workability owing to their high stiffness.</p>

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Ultra-High-Strength Lightweight Fiber-Reinforced Concrete: A Review

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月3日

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  • Su Sung Jo,
  • Tan Duy Phan,
  • Do Hyung Lee,
  • Sang Yeop Chung,
  • Dong Joo Kim

摘要

This study provides a comprehensive overview of the material and mechanical properties of lightweight fiber-reinforced cementitious composites (L-FRCCs), focusing on their classification as ultra-high-strength lightweight fiber-reinforced cementitious composites (UL-FRCCs). The L-FRCCs exhibit a density of 1440–2150 kg/m3, thermal coefficient of 0.22–0.33 W/mK, compressive strength of 45–145 MPa, and flexural strength of 4.3–37.5 MPa. The strength of the L-FRCCs increases linearly with matrix strength. Specifically, L-FRCCs with compressive strength > 100 MPa, flexural strength < 15 MPa, density < 1950 kg/m3, and thermal conductivity < 0.5 W/mK can be classified as UL-FRCCs. Pearson correlation analysis reveals that the structural efficiency (SE) of L-FRCCs increases with increasing matrix strength, fiber volume content, and reinforcing index; however, it decreases with an increase in the lightweight aggregate (LWA) ratio. For UL-FRCCs to achieve optimal SE, the LWAs should possess a crushing strength > 70 MPa and specific gravity < 0.5. Additionally, incorporating straight steel fibers at volumes < 2.5% is recommended to achieve strengths > 100 MPa. Compared to nonmetallic fibers such as polymeric fibers, steel fibers offer superior SE for flexural strength, despite their tendency to reduce workability owing to their high stiffness.