Journal of Japan Society of Civil Engineers, Ser. E2 (Materials and Concrete Structures)
Online ISSN : 2185-6567
ISSN-L : 2185-6567
Paper (In Japanese)
EVALUATION OF BENDING PERFORMANCE OF ARAMID SHORT FIBER REINFORCED CONCRETE EXPOSED IN ENVIRONMENTS OF DIFFERENT TEMPERATURE WATER AND AIR
Atsushi HOKURAShinichi MIYAZATOShuhei OKAMURADaishi YOSHIMOTOHiroshi KURAKATA
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2020 Volume 76 Issue 4 Pages 374-385

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Abstract

 Although the mechanical performance just after the production of short fiber reinforced concrete has been clarified, the evaluation of the mechanical performance after being exposed for a long time in view of the influence of water has not been made. Therefore, in this study, the bending strength and bending toughness of aramid short fiber reinforced concrete after exposure in water and air at different temperatures were evaluated. As a result, 1) The mechanical performance after exposure in water decreases with time as the exposure temperature is higher, while the mechanical performance after exposure in air is kept. 2) The mechanical performance after exposure for 100 years in water at 20°C was estimated by exposure for 1 month to 3 years in a high temperature water environment. 3) When bundled-type short fibers were mixed, it is expected to retain mechanical performance of 90% or more of the initial value even if exposed to water at 20°C for 100 years.

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© 2020 by Japan Society of Civil Engineers
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