Abstract
Polypropylene (PP)-fibers are one of the most widely used polymer fibers for several different applications in fiber reinforced concrete due to their availability, low price, chemical inertness and stability in high alkaline environment. In order to improve the fracture energy and toughness of fiber-reinforced mineral-based composites under impact loads, the energy absorption provided by the fiber material itself but also the failure mechanisms in the fiber-matrix interphase play a crucial role. A desirable pull-out behavior for high energy absorption is achieved for polymer fibers with high tensile strength in combination with high surface roughness. Based on this knowledge, new PP-bicomponent fibers have been developed containing different particles (e.g. Al2O3, CaCO3) in the outer shell in order to generate a rough fiber surface. In this work the results of first spinning trials of PP-bicomponent fibers produced by a lab-scale spinning equipment are presented. The fibers` tensile strength and particle distribution along the surface was determined depending on the drawing ratio. In single-fiber pull-out tests the fibers enabled high energy absorption compared to state-of-the-art PP-fibers. Furthermore, the structure of the fibers surface before and after pull-out was analyzed by scanning electron microscopy and revealed enhanced mechanical interlocking.
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References
Curosu, I., Liebscher, M., Mechtcherine, V., Bellmann, C., Michel, S.: Tensile behavior of high-strength strain-hardening cement-based composites (HS-SHCC) made with high-performance polyethylene, aramid and PBO fibers. Cem. Concr. Res. 98, 71–81 (2017)
Mechtcherine, V.: Novel cement-based composites for the strengthening and repair of concrete structures. Constr. Build. Mater. 41, 365–373 (2013)
Wölfel, E.: Interphases in polypropylene and glass fiber reinforced cementitious model composites under dynamic loading. In: Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures (2019). (IA-FraMCoS, 2019)
Curosu, I., Mechtcherine, V., Millon, O.: Effect of fiber properties and matrix composition on the tensile behavior of strain-hardening cement-based composites (SHCCs) subject to impact loading. Cem. Concr. Res. 82, 23–35 (2016)
Wölfel, E., Brünig, H., Curosu, I., Mechtcherine, V., Scheffler, C.: Dynamic single-fiber pull-out of polypropylene fibers produced with different mechanical and surface properties for concrete reinforcement. Materials 14, 722 (2021)
Naeimirad, M., et al.: Recent advances in core/shell bicomponent fibers and nanofibers: a review. J. Appl. Polym. Sci. 135, 46265 (2018)
Lhoneux, B., et al.: Development of high tenacity polypropylene fibers for cementitious composites. In: JCI International Workshop on Ductile Fiber Reinforced Cementitious Composites (2002). (DFRCC 2002)
Kaufmann, J., Schwitter, E.: Bi-component synthetic fibres for application in cement-bonded building materials. U.S. Patent Application 12/067,860 (54) (2009)
Kaufmann, J., Lübben, J., Schwitter, E.: Mechanical reinforcement of concrete with bi-component fibers. Compos. A Appl. Sci. Manuf. 38, 1975–1984 (2007)
Coppola, B., Di Maio, L., Scarfato, P., Incarnato, L.: Use of polypropylene fibers coated with nano-silica particles into a cementitious mortar. In: AIP Conference Proceedings, vol. 1695, p. 020056 (2015)
Ratu, R.N.: Development of polypropylene fiber as concrete reinforcing fiber (University of British Columbia (2016)
Szabová, R., Černáková, Ľ, Wolfová, M., Černák, M.: Coating of TiO2 nanoparticles on the plasma activated polypropylene fibers. Acta Chimica Slovaca 2, 70–76 (2009)
Scheffler, C., Zhandarov, S., Mäder, E.: Alkali resistant glass fiber reinforced concrete: pull-out investigation of interphase behavior under quasi-static and high rate loading. Cement Concr. Compos. 84, 19–27 (2017)
Acknowledgements
The authors greatly acknowledge the funding by the Deutsche Forschungsgemeinschaft (DFG - German Research Foundation) in the framework of the Research Training Group GRK 2250/1 “Mineral-bonded composites for enhanced structural impact safety”, project number 287321140.
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Popa, MM., Brünig, H., Curosu, I., Mechtcherine, V., Scheffler, C. (2022). Spinability and Characteristics of Particle-Shell PP-bicomponent Fibers for Crack Bridging in Mineral-Bonded Composites. In: Serna, P., Llano-Torre, A., Martí-Vargas, J.R., Navarro-Gregori, J. (eds) Fibre Reinforced Concrete: Improvements and Innovations II. BEFIB 2021. RILEM Bookseries, vol 36. Springer, Cham. https://doi.org/10.1007/978-3-030-83719-8_23
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DOI: https://doi.org/10.1007/978-3-030-83719-8_23
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