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Title: Effect of Exposure to Elevated Temperature on Polypropylene Fiber-Reinforced Concrete

Author(s): Ziad Bayasi and Mubarak Al Dhaheri

Publication: Materials Journal

Volume: 99

Issue: 1

Appears on pages(s): 22-26

Keywords: flexural strength; temperature; volume.

DOI: 10.14359/11312

Date: 1/1/2002

Abstract:
This paper discusses the effect of exposure to elevated temperature upon fibrillated polypropylene fiber reinforced concrete. Literature review indicates that polypropylene fibers, when uniformly distributed within concrete, play an active role in improving spalling resistance of concrete induced to elevated temperature. The experimental program described herein includes specimens 100 x 100 x 350 mm with fiber volume of 0.1 to 0.3% that were subjected to temperatures ranging from 100 to 200 C for durations of 1, 7, and 30 days. Postpeak flexural strength is used to determine the effectiveness of fibrillated polypropylene fibers in concrete reinforcement. This paper shows that ultimate bending strength as well as postpeak flexural strength decrease with increasing exposure temperature, duration, or both. Furthermore, exposure to temperatures below 100 C does not seem to significantly affect the flexural behavior of polypropylene fiber reinforced concrete.