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Materials 2014, 7(12), 7634-7652; doi:10.3390/ma7127634

Processing and Mechanical Properties of Macro Polyamide Fiber Reinforced Concrete

1,†
,
2,†,* , 3,†
and
4,†
1
Research and Business Development Center, Kolon Global Corp, Pogok-eup, Cheoin-gu, Yongin-si, Gyeonggi-do 449-815, Korea
2
Department of Civil Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea
3
Department of Urban Construction Engineering, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon 406-772, Korea
4
Expressway and Transportation Research Institute, Korea Expressway Corp. 208-96, Dongbu-daero 922 beon-gil, Dongtan-myeon, Hwaseong-si, Gyeonggi-do 445-810, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 28 August 2014 / Revised: 20 October 2014 / Accepted: 17 November 2014 / Published: 26 November 2014
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Abstract

This study developed a macro-sized polyamide (PA) fiber for concrete reinforcement and investigated the influence of the PA fiber on flexural responses in accordance with ASTM standards. PA fibers are advantageous compared to steel fibers that are corrosive and gravitated. The macro-sized PA fiber significantly improved concrete ductility and toughness. Unlike steel fibers, the PA fibers produced two peak bending strengths. The first-peaks occurred near 0.005 mm of deflection and decreased up to 0.5 mm of deflection. Then the bending strength increased up to second-peaks until the deflections reached between 1.0 and 1.5 mm. The averaged flexural responses revealed that PA fiber content did not significantly influence flexural responses before L/600, but had significant influence thereafter. Toughness performance levels were also determined, and the results indicated more than Level II at L/600 and Level IV at others. View Full-Text
Keywords: fiber; polyamide; mechanical properties; mechanical testing; extrusion fiber; polyamide; mechanical properties; mechanical testing; extrusion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jeon, J.K.; Kim, W.; Jeon, C.K.; Kim, J.C. Processing and Mechanical Properties of Macro Polyamide Fiber Reinforced Concrete. Materials 2014, 7, 7634-7652.

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