Effect of Elevated Temperature on Some Properties of Air-Entrained Steel Fibers Reinforced Concrete

Burhan Abdurrahman, Rana; Hakeem Hamed Ahmad, Abdul

doi:10.33899/rengj.2009.43276

	Effect of Elevated Temperature on Some Properties of Air-Entrained Steel Fibers Reinforced Concrete
Al-Rafidain Engineering Journal (AREJ)
Article 6, Volume 17, Issue 4, 2009, Pages 28-41 PDF (0 K)
DOI: 10.33899/rengj.2009.43276
Authors
Rana Burhan Abdurrahman; Abdul Hakeem Hamed Ahmad
Abstract
Abstract In this paper, an experimental investigation was conducted to explore the mechanical properties of air entrained steel fibers reinforced concrete (AESFC). The residual mechanical properties measured include compressive and splitting tensile strengths, modulus of elasticity and (stress – strain) curves. Air-entrained concretes (AECs) were prepared with different steel fibers content (0, 0.4, 0.8, and 1.2) % added to enhance the strength of concrete. After exposure to high temperature included (200, 400, 600) ◦C, the residual mechanical properties of AESFC were investigated and compared with normal concrete. Test results showed reduction in properties by different ratio for all types of concrete after exposure to elevated temperature, the tensile strength and elastic modulus deteriorated with temperature more than the compressive strength. Using steel fibers seems effective in minimizing the degradation of strength for the concrete. Results showed also that the decrease in compressive strength after exposure to high temperature could be reduced by increasing volume of samples. Heating accompanied with weight losses and color changes became clearer at (400 – 600) ◦C exposure. Key words: Air entrained concrete; steel fibers ; elevated temperature
Keywords
Key Words; Steel Fibers; elevated temperature

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