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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access November 17, 2014

Nonthermal plasma modification of polypropylene fibres for cementitious composites

Tomáš Morávek EMAIL logo , Monika Fialová , Daniel Kopkáně , Jozef Ráheľ , Pavel Sťahel and Mirko Černák
From the journal Open Chemistry

Abstract

The plasma treatment of polypropylene fibres used as concrete admixtures for improving its mechanical properties is the focus of this research paper. A plasma treatment was conducted in a low-temperature plasma environment at atmospheric pressure in a DCSBD (Diffuse Coplanar Surface Barrier Discharge). The degree of hydrophilicity caused by the plasma treatment was determined by measuring the rate of penetration of water into the porous media, commonly referred to as the Washburn method. The influence of the addition of PP (polypropylene) fibres to the concrete matrix was investigated using a three point bending test which determined the flexural strength of concrete samples. Our experiments demostrate that plasma improves both the wettability of PP fibres and its adhesion to the concrete matrix. The tests of flexural strength show, that even a short plasma treatment (5 s) can have a significant impact on the mechanical properties of fibre-reinforced concrete composite.

Graphical Abstract

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Received: 2014-1-16
Accepted: 2014-5-29
Published Online: 2014-11-17

© 2015 Tomáš Morávek et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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