International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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A Study on Residual Compression Behavior of Structural Fiber Reinforced Concrete Exposed to Moderate Temperature Using Digital Image Correlation

  • Srikar, G. (Department of Civil Engineering, Indian Institute of Technology) ;
  • Anand, G. (Department of Civil Engineering, Indian Institute of Technology) ;
  • Prakash, S. Suriya (Department of Civil Engineering, Indian Institute of Technology)
  • Received : 2015.03.05
  • Accepted : 2016.01.26
  • Published : 2016.03.30
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Abstract

Fire ranks high among the potential risks faced by most buildings and structures. A full understanding of temperature effects on fiber reinforced concrete is still lacking. This investigation focuses on the study of the residual compressive strength, stress strain behavior and surface cracking of structural polypropylene fiber-reinforced concrete subjected to temperatures up to $300^{\circ}C$. A total of 48 cubes was cast with different fiber dosages and tested under compression after exposing to different temperatures. Concrete cubes with varying macro (structural) fiber dosages were exposed to different temperatures and tested to observe the stress-strain behavior. Digital image correlation, an advanced non-contacting method was used for measuring the strain. Trends in the relative residual strengths with respect to different fiber dosages indicate an improvement up to 15 % in the ultimate compressive strengths at all exposure temperatures. The stress-strain curves show an improvement in post peak behavior with increasing fiber dosage at all exposure temperatures considered in this study.

Keywords

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