Comparative Impact Behavior of Four Long Carbon Fiber Reinforced Concretes
Abstract
The addition of long carbon fibers (fibers more than 10. mm in length) to traditional reinforced concrete is proposed as a method to improve the impact spalling resistance of concrete. A series of experimental tests were conducted to compare the impact resistance of plain concrete (PC), steel reinforced concrete, and four different types of long carbon fiber reinforced concrete (LCFRC) panels. The plain and conventional steel reinforced concrete panels served as control specimens. Of the four types of long carbon fibers tested in this study, the first fiber type consisted of an epoxy-impregnated, bidirectional weave (Type A), while the remaining types consisted of fiber tow with three different variations of a polypropylene support system (Type B). To determine the properties and performance of the LCFRC, experimental testing included a drop weight impact test of the panels as well as a standard ASTM test method for flexural performance of fiber-reinforced concrete. The results from each test in terms of impact energy, time histories of impact load and deflection, strain energy, failure crack pattern, and flexural properties were then compared to one another. This comparison indicated that adding long carbon fibers to concrete increases the post-cracking behavior of the concrete and decreases fragmentation during an impact test. Of the four fibers tested, Fiber Type B3 exhibited the highest performance, absorbing more energy during impact. This result is most likely related to the unique shape of this type of fiber in comparison to the others, which allowed more extensive wetting of the fiber with cement paste and thus improved bond to the cementitious matrix. © 2013 Elsevier Ltd.
Recommended Citation
Z. S. Tabatabaei et al., "Comparative Impact Behavior of Four Long Carbon Fiber Reinforced Concretes," Materials and Design, vol. 55, pp. 212 - 223, Elsevier, Jan 2014.
The definitive version is available at https://doi.org/10.1016/j.matdes.2013.09.048
Department(s)
Civil, Architectural and Environmental Engineering
International Standard Serial Number (ISSN)
1873-4197; 0264-1275
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jan 2014
Comments
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