Fiber reinforced concrete: Residual flexure strength enhancement using surface modified fibers

0561149 - FZÚ 2023 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Tichá, P. - Domonkos, M. - Demo, Pavel
Fiber reinforced concrete: Residual flexure strength enhancement using surface modified fibers.
AIP Conference Proceedings. Vol. 2322. Melville: AIP Publishing, 2021 - (Reiterman, P.), č. článku 020030. ISBN 978-0-7354-4066-1.
[Special Concrete and Composites 2020 /17./. Skalský Dvůr (CZ), 14.10.2020-14.10.2020]
Institucionální podpora: RVO:68378271
Klíčová slova: polymer fibers
Obor OECD: Civil engineering
https://doi.org/10.1063/5.0042044

Fiber reinforced concrete often fails due to poor adhesion between polymer fibers and the cement matrix which is caused by fiber flat and chemically inert surfaces. Such a phenomenon can be overcome by modifying the fibers with plasma treatment which activate and roughen their surfaces. Polypropylene-polyethylene and polypropylene macro-fibers were exposed to low-pressure cold dioxygen plasma treatment for 30 seconds. In order to quantify how plasma treated fibers can affect mechanical response of fiber reinforced concrete, notched specimens containing 0.75 vol. % of reinforcement were made and subjected to three-point bending test. It was shown that specimens with modified fibers exhibited up to 40 % improvement in residual flexural tensile strength than those containing reference reinforcement.
Trvalý link: https://hdl.handle.net/11104/0333835