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Deterioration of bonding capacity of plasma-treated polymer fiber reinforcement
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SYSNO ASEP 0500480 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Deterioration of bonding capacity of plasma-treated polymer fiber reinforcement Author(s) Trejbal, J. (CZ)
Nežerka, V. (CZ)
Somr, M. (CZ)
Fládr, J. (CZ)
Potocký, Štěpán (FZU-D) RID, ORCID
Artemenko, Anna (FZU-D) RID, ORCID
Tesárek, P. (CZ)Number of authors 7 Source Title Cement and Concrete Composites. - : Elsevier - ISSN 0958-9465
Roč. 89, May (2018), s. 205-215Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords polymer fiber reinforcement ; chemical bonding ; cold plasma treatment ; pull-out strength ; contact angle Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Civil engineering R&D Projects LM2015088 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000433400800018 EID SCOPUS 85044140485 DOI 10.1016/j.cemconcomp.2018.03.010 Annotation Bonding between reinforcing fibers and a brittle cementitious matrix is the key ingredient for a ductile concrete production. Oxygen plasma treatment proved to be a promising technique for increasing the fiber surface adhesion to liquids, but a question about the stability of activated bonding when exposed to atmospheric conditions arises. We present a study on deterioration of such treatment in time for different fibers commonly used as dispersed reinforcement. A microscopy investigation allowed to observe changes in the fiber surface morphology, while the changes in chemical bonds were detected by XPS analysis. To quantify the impact of plasma treatment and its deterioration, WCA measurements and pull-out tests were carried out. The results indicate that the exposure to atmospheric conditions has a negligible impact on fiber bonding, because surface roughening plays a major role. Therefore, fibers need not be incorporated into a concrete mix immediately after their treatment. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
Number of the records: 1