Manufacturing Technology 2021, 21(2):247-254 | DOI: 10.21062/mft.2021.030

Influence of basic environment of geopolymer composites on degradation rates of E and AR type glass fibers

Martina Ryvolová, Lucie Svobodová, Totka Bakalova, Lukáš Voleský
Faculty of Mechanical Engineering, Technical University of Liberec, Studentská 1402/2, 461017 Liberec, Czech Republic

The topic of the article is to compare the mechanical properties and define the differences in the degra-dation process for anticorrosive glass fibres type AR and for glass fibres type E after influence of the alkaline environment in the geopolymer composite. The ongoing reactions between glass fibres and al-kaline environment lead to the dissolution and slowly decomposition of the fibres and consequently to the loss of the mechanical properties of the composite. Corrosion of glass fibres is characterized by weight loss, change of fibre diameter, reduction of mechanical properties and formation of mineral in-crustations on the surface of the fibre, which gradually leads to the formation of a continuous corrosion coating so called corrosion shell. Scanning electron microscopy was used to monitor the morphology of the fiber surface, and image analysis methods were used to evaluate morphological changes. Tests of mechanical properties (fibers - tensile test, composite materials - three-point bending and Charpy test) were used to confirm ongoing degradation processes due to the long-term influence of the alkaline envi-ronment on both types of glass fibers.

Keywords: Anticorrosion glass fibres, geopolymer composite, corrosion process, strength, image analysis
Grants and funding:

Supported by the Student Grant Competition of the Technical University of Liberec under the project No. SGS-2020-5019 and by the Ministry of Industry and Trade in the framework of the targeted support of the Application, Call VII, the Operational Program Enterprise and Innovations for Competitiveness – “Research and development of textile products focusing on knitting technology and using aqueous chemicals”, reg. number CZ.01.1.02/0.0/0.0/19_262/0020121.

Received: September 30, 2020; Revised: December 11, 2020; Accepted: February 16, 2021; Prepublished online: March 22, 2021; Published: April 6, 2021  Show citation

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Ryvolová M, Svobodová L, Bakalova T, Voleský L. Influence of basic environment of geopolymer composites on degradation rates of E and AR type glass fibers. Manufacturing Technology. 2021;21(2):247-254. doi: 10.21062/mft.2021.030.
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