Details
| Original language | English |
|---|---|
| Article number | 2476 |
| Number of pages | 10 |
| Journal | Applied Sciences (Switzerland) |
| Volume | 9 |
| Issue number | 12 |
| Publication status | Published - 2 Jun 2019 |
Abstract
The paper presents an investigation into the durability of functionalized carbon structures (FCS) in a highly alkaline concrete environment. First, the suitability of optical fibers with different coatings-i.e., acrylate, polyimide, or carbon-for the FCS was investigated by subjecting fibers with different coatings to micro/macro bending and a 5% sodium hydroxide (NaOH) (pH 14) solution. Then, the complete FCS was also subjected to a 5% NaOH solution. Finally, the effects of spatial variation of the fiber embedded in the FCS and the bonding strength between the fiber and FCS was evaluated using different configurations -i.e., fiber integrated into FCS in a straight line and/or with offsets. All three coatings passed the micro/macro bending tests and show degradation after alkaline exposure, with the carbon coating showing least degradation. The FCS showed relative stability after exposure to 5% NaOH. The optimum bonding length between the optical fiber and the carbon filament was found to be ≥ 150 mm for adequate sensitivity.
Keywords
- Carbon reinforced concrete (CRC), Fiber optic sensor (FOS), Functionalized carbon structure (FCS), Optical glass fiber, Structural health monitoring (SHM)
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- General Engineering
- Chemical Engineering(all)
- Process Chemistry and Technology
- Computer Science(all)
- Computer Science Applications
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
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In: Applied Sciences (Switzerland), Vol. 9, No. 12, 2476, 02.06.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Durability of Functionalized Carbon Structures with Optical Fiber Sensors in a Highly Alkaline Concrete Environment
AU - Bremer, Kort
AU - Alwis, Lourdes S.M.
AU - Zheng, Yulong
AU - Weigand, Frank
AU - Kuhne, Michael
AU - Helbig, Reinhard
AU - Roth, Bernhard
N1 - Funding Information: Funding: This research was funded by the Bundesministerium fuer Bildung und Forschung (BMBF) within Grant Number 03ZZ0345 (Carbon Concrete Composite (C3)). B.R. acknowledges support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122). The publication of this article was funded by the Open Access fund of Leibniz Universität Hannover.
PY - 2019/6/2
Y1 - 2019/6/2
N2 - The paper presents an investigation into the durability of functionalized carbon structures (FCS) in a highly alkaline concrete environment. First, the suitability of optical fibers with different coatings-i.e., acrylate, polyimide, or carbon-for the FCS was investigated by subjecting fibers with different coatings to micro/macro bending and a 5% sodium hydroxide (NaOH) (pH 14) solution. Then, the complete FCS was also subjected to a 5% NaOH solution. Finally, the effects of spatial variation of the fiber embedded in the FCS and the bonding strength between the fiber and FCS was evaluated using different configurations -i.e., fiber integrated into FCS in a straight line and/or with offsets. All three coatings passed the micro/macro bending tests and show degradation after alkaline exposure, with the carbon coating showing least degradation. The FCS showed relative stability after exposure to 5% NaOH. The optimum bonding length between the optical fiber and the carbon filament was found to be ≥ 150 mm for adequate sensitivity.
AB - The paper presents an investigation into the durability of functionalized carbon structures (FCS) in a highly alkaline concrete environment. First, the suitability of optical fibers with different coatings-i.e., acrylate, polyimide, or carbon-for the FCS was investigated by subjecting fibers with different coatings to micro/macro bending and a 5% sodium hydroxide (NaOH) (pH 14) solution. Then, the complete FCS was also subjected to a 5% NaOH solution. Finally, the effects of spatial variation of the fiber embedded in the FCS and the bonding strength between the fiber and FCS was evaluated using different configurations -i.e., fiber integrated into FCS in a straight line and/or with offsets. All three coatings passed the micro/macro bending tests and show degradation after alkaline exposure, with the carbon coating showing least degradation. The FCS showed relative stability after exposure to 5% NaOH. The optimum bonding length between the optical fiber and the carbon filament was found to be ≥ 150 mm for adequate sensitivity.
KW - Carbon reinforced concrete (CRC)
KW - Fiber optic sensor (FOS)
KW - Functionalized carbon structure (FCS)
KW - Optical glass fiber
KW - Structural health monitoring (SHM)
UR - http://www.scopus.com/inward/record.url?scp=85068121049&partnerID=8YFLogxK
U2 - 10.3390/app9122476
DO - 10.3390/app9122476
M3 - Article
AN - SCOPUS:85068121049
VL - 9
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
SN - 2076-3417
IS - 12
M1 - 2476
ER -