Materiales de Construcción, Vol 68, No 329 (2018)

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


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

W. H. Kwan
Department of Construction Management, Universiti Tunku, Malaysia
orcid http://orcid.org/0000-0003-1079-613X

C. B. Cheah
School of Housing, Building and Planning, Universiti Sains Malaysia, Malaysia
orcid http://orcid.org/0000-0003-2261-2991

M. Ramli
School of Housing, Building and Planning, Universiti Sains Malaysia, Malaysia
orcid http://orcid.org/0000-0003-3359-9411

K. Y. Chang
School of Housing, Building and Planning, Universiti Sains Malaysia, Malaysia
orcid http://orcid.org/0000-0003-3895-5278

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.

Keywords


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

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