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Materials 2018, 11(7), 1115; https://doi.org/10.3390/ma11071115

Electromechanical Response of High-Performance Fiber-Reinforced Cementitious Composites Containing Milled Glass Fibers under Tension

Department of Civil and Environmental Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea
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Received: 23 May 2018 / Revised: 21 June 2018 / Accepted: 28 June 2018 / Published: 29 June 2018
(This article belongs to the Special Issue Electronic Skin and Its Strain Sensing Application)
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Abstract

The self-damage sensing capacity of high-performance fiber-reinforced cementitious composites (HPFRCCs) that blended long- (1 vol %) and medium-length (1 vol %) smooth steel fibers was considerably improved by adding milled glass fibers (MGFs) with a low electrical conductivity to a mortar matrix. The addition of MGFs (5 wt %) significantly increased the electrical resistivity of the mortar matrix from 45.9 to 110.3 kΩ·cm (140%) and consequently improved the self-damage sensing capacity (i.e., the reduction in the electrical resistivity during the tensile strain-hardening response) from 17.27 to 25.56 kΩ·cm (48%). Furthermore, the addition of MGFs improved the equivalent bond strength of the steel fibers on the basis of the higher pullout energy owing to the accumulated cementitious material particles attached to the surfaces of steel fibers. View Full-Text
Keywords: high-performance fiber-reinforced cementitious composites (HPFRCCs); self-damage sensing; milled glass fibers (MGFs); electrical resistivity; interfacial bond strength high-performance fiber-reinforced cementitious composites (HPFRCCs); self-damage sensing; milled glass fibers (MGFs); electrical resistivity; interfacial bond strength
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Kim, M.K.; Kim, D.J. Electromechanical Response of High-Performance Fiber-Reinforced Cementitious Composites Containing Milled Glass Fibers under Tension. Materials 2018, 11, 1115.

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