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International Journal of Polymer Science
Volume 2015, Article ID 616949, 11 pages
http://dx.doi.org/10.1155/2015/616949
Research Article

Interface Bond Characterization between Fiber and Cementitious Matrix

1Department of Architectural Engineering, Gachon University, Gyeonggi 13120, Republic of Korea
2Department of Architectural Engineering, Chungnam National University, Daejeon 34134, Republic of Korea

Received 5 June 2015; Revised 11 August 2015; Accepted 11 August 2015

Academic Editor: Osman Gencel

Copyright © 2015 Won-Chang Choi et al. 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.

Abstract

The use of high performance composite fibers allows for the improvement of the mechanical properties of cement composites. Previous research results indicate that the mechanical properties of such composites are determined predominantly by the interface properties between the fiber and cementitious matrix. Many researchers have conducted single-fiber pull-out tests using cementitious composites to quantify the interfacial properties between the fiber and cement matrix. This paper aims to establish a design methodology that employs coefficients to represent the design parameters for the interfacial properties for three types of fibers: carbon fiber, polypropylene fiber, and twisted wire strand steel cord. The parameters for each type of fiber include the water-to-binder ratio and fiber embedment length. The adopted equation used for the numerical analysis was calibrated using experimental data, and design coefficients are proposed accordingly. The developed models could be validated successfully, and the pull-out characteristics of each fiber type are presented.