CHLORIDE PENETRATION RESISTANCE, ELECTRICAL RESISTIVITY AND MECHANICAL PROPERTIES OF CONCRETE WITH ARAMID FIBER
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Abstract
This paper aims to study the effect of aramid fiber on chloride penetration resistance, electrical resistivity and mechanical properties of concrete. The study used aramid fibers with two different shapes of straight and twisted, and three aspect ratios of 60, 80 and 100. Bulk chloride diffusion, rapid chloride penetration, electrical resistivity, compressive strength and tensile strength of concrete were investigated. Water to binder was kept at 0.55, and the fiber content of 1% by volume of concrete was applied. From the experimental results, it was found that aramid fiber reinforced concrete (AFRC) had higher bulk chloride diffusion resistance and rapid chloride penetration resistance than controlled concrete without fiber. AFRC had higher both surface and bulk electrical resistivities than no-fiber concrete. The use of aramid fiber in concrete did not significantly affect the compressive strength for mechanical properties, but it greatly increased the tensile strength of concrete. Besides, the presence of fibers improves damage patterns of concrete specimens to be more ductile.
Article Details
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
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