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
In our research, the corrosion mechanism on the surface of anti-corrosion glass fibers of type AR and glass fibers of type E was studied. The monitoring was performed under the influence of an alkaline environment. The glass fibers were placed in a solution of calcium hydroxide Ca(OH)2 for a specified period of 2, 4, 6, 12, 24, 48 weeks. The change in mechanical properties was monitored; basen on test ČSN ISO 695 was evaluate the durability and resistance of E-GF and AR-GF to corrosion. The
more » ... corrosion. The degradation resistance of the fibers was evaluated using a tensile strength test (ASTM D2343-17). The use of the investigated fibers (as reinforcement in a geopolymer composite) led to a 250 % increase in flexural strength for AR-GF; for the E-GF sample, the flexural strength increased by 150 %. The deflection of the reinforcing geopolymer composite increased by 180 % compared to the pure geopolymer mixture (for both types AR and E). The surface morphology of the fibers was characterized by scanning electron microscopy (SEM). Quantitative evaluation of the corrosion mechanism was performed through modern procedure based on image analysis (Matlab software).
doi:10.21062/mft.2021.030 fatcat:rjnxmmfmfzaepefop7m2xsogeq