Influence of Oxygen Plasma Surface Treatment of PET Micro Fibers on Flexural Strength of Reinforced Cement Pastes

Abstract:

Presented work deals with PET (polyethylene terephthalate) fiber-reinforced cement pastes and cool oxygen plasma fiber surface treatment used to attain the better adhesion between fibers surface and the cement matrix. Three sets of cement paste samples were made with the same matrix (CEM I 42.5R with water to cement ratio equal to 0.4). The two sample sets contained micro fiber reinforcement varying in surface properties. One set was reinforced with unmodified fibers, while in to the other set plasma treated fibers were used. As a comparative indicator to bending response of the composite materials, four-point destructive tests were carried out. The samples reinforced with unmodified fibers exhibited deflection-softening behavior during the post-cracking phase, while samples with plasma treated fibers exhibited deflection-hardening behavior.

• Periodical: Applied Mechanics and Materials (Volume 825)
• Pages: 73-76
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.825.73
• Online since: February 2016
• Authors: Jan Trejbal*, Jan Bartoš, Lubomír Kopecký, Pavla Ryparová, Štěpán Potocký
• Keywords: Cement Paste, Four-Point Bending Test, PET Micro Fiber Reinforcement

References

[1] K. Seps, J. Vodicka, Fibre Reinforced Concrete with Recycled Concrete and Insulation Material STERED, Special Concrete and Composites 1054 (2014) 162-266.

DOI: 10.4028/www.scientific.net/amr.1054.262

[2] J. Topič et al., Development of mechanical properties of the cement composite reinforced with synthetic fibers, in. Proceedings of the 53rd Conference on Experimental Stress Analysis, EAN 2015, Český Krumlov, 442-445.

[3] P. K. Mallick, Fiber-reinforced composites: Materials, manufacturing, and design, third ed., CRC Press, Florida, (2007).

[4] J. Trejbal et al., The effect of glass fiber reinforcement on flexural strength of lime-based mortars, in. Proceedings of the 53rd Conference on Experimental stress analysis, EAN 2015, Český Krumlov, 450-453.

[5] S. E. Elsaka, Influence of chemical surface treatments on adhesion of fiber posts to composite resin core materials, Dental materials 29 (2013) 550-558.

DOI: 10.1016/j.dental.2013.03.004

[6] D. Cokeliler et al., Modification of glass fibers to improve reinforcement: A plasma polymerization technique, Dental materials 23 (2007) 335-342.

DOI: 10.1016/j.dental.2006.01.023

[7] B. Felekoglu, K. Tosun, B. Baradan, A comparative study on the flexural performance of plasma treated polypropylene fiber reinforced cementitious composites, Journal of Materials Processing Technology 209 (2009) 5133-5144.

DOI: 10.1016/j.jmatprotec.2009.02.015

[8] H. Ch. Wu, V. C. Li, Fiber/cement interface tailoring with plasma treatment, Cement and Concrete Composites 21 (1999) 205-212.

DOI: 10.1016/s0958-9465(98)00053-5

[9] J. Trejbal et al., Modification of surface of reinforced glass fibres for the purpose of used in reinforcement of mortars, in.: Proceedings of the 3rd Conference on Nanomateriály a nanotechnologie ve stavebnictví, NANS 2014, Praha, 144-151.

[10] J. Bartoš et al., Posibilities of modification PET microfibers surface layer to improve their cohesion with cement matrix, in. Proceedings of the 3rd Conference on Nanomateriály a nanotechnologie ve stavebnictví, NANS 2014, Praha, 8-11.

[11] S. Singha, A. Shuklaa, R. Brown, Pullout behavior of polypropylene fibers from cementitious matrix, Cement and concrete research. 34 (2004) 1919-(1925).

DOI: 10.1016/j.cemconres.2004.02.014

[12] J. Trejbal, P. Tesárek, Š. Potocký, The infuence of plasma treatment on surface wettability of silicon wafers, in. Proceedings of the 4th Conference on Nanomateriály a nanotechnologie ve stavebnictví, NANS 2015, Praha, 96-101.