Alkali-resistant glass fiber reinforced high strength concrete in simulated aggressive environment

W. H. Kwan; C. B. Cheah; M. Ramli; K. Y. Chang

doi:10.3989/mc.2018.13216

Authors

W. H. Kwan Department of Construction Management, Universiti Tunku https://orcid.org/0000-0003-1079-613X
C. B. Cheah School of Housing, Building and Planning, Universiti Sains Malaysia https://orcid.org/0000-0003-2261-2991
M. Ramli School of Housing, Building and Planning, Universiti Sains Malaysia https://orcid.org/0000-0003-3359-9411
K. Y. Chang School of Housing, Building and Planning, Universiti Sains Malaysia https://orcid.org/0000-0003-3895-5278

DOI:

https://doi.org/10.3989/mc.2018.13216

Keywords:

Fibre reinforcement, Glass, Sulphate attack, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM)

Abstract

The durability of the alkali-resistant (AR) glass fiber reinforced concrete (GFRC) in three simulated aggresive environments, namely tropical climate, cyclic air and seawater and seawater immersion was investigated. Durability examinations include chloride diffusion, gas permeability, X-ray diffraction (XRD) and scanning electron microscopy examination (SEM). The fiber content is in the range of 0.6 % to 2.4 %. Results reveal that the specimen containing highest AR glass fiber content suffered severe strength loss in seawater environment and relatively milder strength loss under cyclic conditions. The permeability property was found to be more inferior with the increase in the fiber content of the concrete. This suggests that the AR glass fiber is not suitable for use as the fiber reinforcement in concrete is exposed to seawater. However, in both the tropical climate and cyclic wetting and drying, the incorporation of AR glass fiber prevents a drastic increase in permeability.

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