PT  - JOURNAL ARTICLE
AU  - Ryvolová, Martina
AU  - Svobodová, Lucie
AU  - Bakalova, Totka
AU  - Voleský, Lukáš
TI  - Influence of basic environment of geopolymer composites on degradation rates of E and AR type glass fibers
DP  - 2021 Apr 6
TA  - Manufacturing Technology Journal
PG  - 247--254
VI  - 21
IP  - 2
AID - 10.21062/mft.2021.030
IS  - 12132489
AB  - 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.