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http://dx.doi.org/10.14190/JRCR.2020.8.2.212

Fire Resistance of Ultra-High Performance Concrete According to the Amount of Polypropylene Fiber  

Choi, Jeong-Il (Biohousing Research Center, Chonnam National University)
Cho, Ki Hyeon (School of Architecture, Chonnam National University)
Yu, Hyun Sang (School of Architecture, Chonnam National University)
Kim, Hee Joon (School of Architecture, Chonnam National University)
Lee, Bang Yeon (School of Architecture, Chonnam National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.2, 2020 , pp. 212-218 More about this Journal
Abstract
The purpose of this study is to investigate the fire resistance of ultra-high-performance concrete according to the amount of polypropylene fiber. Different mixtures according to the amount of polypropylene fiber were exposed to a maximum temperature of 900℃; and explosive spalling, residual compressive strength, and ultrasonic velocity of each specimen were evaluated. Test results showed that the fire resistance can be improved by including a small amount of polypropylene fiber in ultra-high performance concrete. It was not observed that explosive spalling occur at a temperature of 900℃ when the polypropylene fibers over 0.4% were included. Residual compressive strength and ultrasonic velocity decreased by 48% and 44%, respectively, compared to those at room temperature.
Keywords
Fire resistance; Ultra-high performance concrete; Polypropylene fiber;
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