A Study on the Bond Performance Improvement of Polypropylene Macro Fibers According to the Change of Surface Area

Abstract:

Fiber Reinforced Concrete (FRC) is a representative strengthening method adopted to improve the sudden brittle failure of concrete under tension and dynamic loadings and to control the generation and propagation of cracks occurring during the curing process. The strengthening performance provided by the fiber is sensitively influenced by the physical properties of the fiber itself as well as by its volume ratio but is also varying according to the difference in the bond performance at the interface between the fiber and concrete. Even if the fiber exhibits outstanding physical performance, if the bond performance does not reach similar level, the fiber will not be able to develop fully its performance. Currently, the methods improving the fiber bond performance are essentially focusing on the improvement of the mechanical bond performance by changing the longitudinal shape of the fiber such as the application of crimped and hooked fibers. A very few methods intend to improve the bond performance by increasing the bond area of the fiber itself. Therefore, this study increases the surface area of the fiber by changing its section while preserving its volume during the fabrication process, conducts tests on the bond performance between the cement paste and the fiber with changed surface area, and examines the changes in the bond performance according to the increase of the surface area.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 1440-1446
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.1440
• Online since: July 2012
• Authors: Sung Yong Choi, Young Hwan Park, Woo Tai Jung
• Keywords: Bond Strength, Crimped, Interface, Surface Area, Volume Contents Ratio

References

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DOI: 10.1016/s0958-9465(01)00043-9