A Study on Residual Compression Behavior of Structural Fiber Reinforced Concrete Exposed to Moderate Temperature Using Digital Image Correlation

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Title: A Study on Residual Compression Behavior of Structural Fiber Reinforced Concrete Exposed to Moderate Temperature Using Digital Image Correlation

Author(s): G. Srikar, G. Anand, and S. Suriya Prakash

Publication: IJCSM

Volume: 10

Issue: 1

Appears on pages(s): 75–85

Keywords: structural polypropylene fibers, fiber dosage, digital image correlation (DIC), residual compressive strength, post-peak behavior

Date: 3/31/2016

Abstract:
Fire ranks high among the potential risks faced by most buildings and structures. A full understanding of temperatureeffects 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 to300 C. A total of 48 cubes was cast with different fiber dosages and tested under compression after exposing to differenttemperatures. Concrete cubes with varying macro (structural) fiber dosages were exposed to different temperatures and tested toobserve the stress–strain behavior. Digital image correlation, an advanced non-contacting method was used for measuring thestrain. Trends in the relative residual strengths with respect to different fiber dosages indicate an improvement up to 15 % in theultimate compressive strengths at all exposure temperatures. The stress–strain curves show an improvement in post peak behaviorwith increasing fiber dosage at all exposure temperatures considered in this study.


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