Scholarlink

<p>Mineral admixtures and nanomaterials are vital for high-strength/high-performance concrete. Studies show steel and concrete degrade at high temperatures, impacting RCC beam flexural behavior. This study examines RCC beams (1200&#xa0;mm × 100&#xa0;mm × 150&#xa0;mm) made with quaternary blended concrete (30% fly ash, 10% metakaolin, 3% nano silica) after 4-h exposure to 400&#xa0;°C and 800&#xa0;°C. Beams were cast, cured for 28&#xa0;days, and flexurally tested under two-point loads in a universal testing machine, recording first crack load and ultimate load. Experimental moment resistance was compared to theoretical values (IS 456-2000). Ductility index and stiffness were also calculated. Investigations revealed that quaternary blended concrete exhibited improved performance compared to control concrete.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Flexural Behaviour of Quaternary Blended Reinforced Concrete Beams Under Elevated Temperatures

  • 期刊论文

  • 发表日期：

    2025年6月3日

查看全文
  • Seshadri Sekhar Tirumala,
  • V. Kiran Kumar

摘要

Mineral admixtures and nanomaterials are vital for high-strength/high-performance concrete. Studies show steel and concrete degrade at high temperatures, impacting RCC beam flexural behavior. This study examines RCC beams (1200 mm × 100 mm × 150 mm) made with quaternary blended concrete (30% fly ash, 10% metakaolin, 3% nano silica) after 4-h exposure to 400 °C and 800 °C. Beams were cast, cured for 28 days, and flexurally tested under two-point loads in a universal testing machine, recording first crack load and ultimate load. Experimental moment resistance was compared to theoretical values (IS 456-2000). Ductility index and stiffness were also calculated. Investigations revealed that quaternary blended concrete exhibited improved performance compared to control concrete.