Experimental Verification of Behavior of Glass and Carbon Fibers in Alkali Environment

Abstract:

The paper discusses durability of glass and carbon fibers which are exposed to alkali environment of concrete. Mainly glass fibers are affected by the high alkali environment with pH of concrete exceeding 12.0. The degradation of fibers is reflected by decreasing of its tension strength, while the rate of decreasing is depended on exposition time and temperature. The paper briefly presents results of a large experimental investigation which should specify an influence of alkali ions concentration in a solution on reduction of the mechanical properties of fibers. Reference samples were immersed in a bath with distilled water and the others were stored at ambient air only.

• Periodical: Key Engineering Materials (Volume 677)
• Pages: 43-48
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.677.43
• Online since: January 2016
• Authors: František Girgle*, Lenka Bodnárová, Anna Kučerová, Petr Janák, Jan Prokeš
• Keywords: Alkali Environment, Carbon Fibers, Degradation, FRP, Glass Fiber, Residual Strength, Tension Strength

References

[1] I. Laníková, P. Štěpánek, P. Šimůnek, Optimized design of concrete structures considering environmental aspects, Advances in Structural Engineering. 17, 4, (2014), 495-511. ISSN 1369-4332, DOI: 10. 1260/1369-4332. 17. 4. 495.

DOI: 10.1260/1369-4332.17.4.495

[2] P. Štěpánek, I. Laníková, J. Plšek, P. Šimůnek, Life time assessment and deterministic based optimization of concrete structure design, Mendel, 2011, pp.301-306. ISSN: 18033814 ISBN: 978-802144302-0.

[3] A. ElSafty, B. Benmokrane, S. Rizkalla, Degradation Assessment of Internal Continuous Fiber Reinforced in Concrete Environment, Material Research Report, Draft Final Report, No. BDK82-977-05, (2014).

[4] Y Chen, Accelerated aging tests and long-term prediction models for durability of FRP bars in concrete, Ph.D. thesis, West Virginia Univ., West Virginia, (2007).

DOI: 10.33915/etd.4293

[5] ACI 440. 3R-04: Guide Test Methods for Fiber-Reinforced Polymers (FRPs) for Reinforcing or Strengthening Concrete Structures, ACI Committee 440, (2004).

[6] ČSN EN 14649 (72 3412) Precast concrete products - Test method for strength retention of glass fibres in cement and concrete (SIC TEST).

DOI: 10.3403/03263890

[7] ČSN EN 15422 (72 3413) Precast concrete products - Specification of glassfibres for reinforcement of mortars and concretes.

DOI: 10.3403/30142452u

[8] ACI 440. 1R-06: Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars, ACI Committee 440, 2006, ISBN 9780870312106.

DOI: 10.14359/51700867