Journal article
Percolation backbone structure analysis in electrically conductive carbon fiber reinforced cement composites
Composites. Part B, Engineering, Vol.43(8), pp.3270-3275
12/2012
Handle:
https://hdl.handle.net/2376/120701
Abstract
A simple model was presented to quantitatively calculate the backbone density of carbon fillers in carbon/cement composites. In this model, a “structure factor”, κ, defined as a function of the aspect ratio of the carbon filler, was first introduced to calculate the backbone density. To obtain the actual backbone density, carbon fiber (CF) reinforced cement composites with different CF concentrations were prepared and their DC electrical conductivities were measured. It was found that, when the CF concentration slightly exceeded the percolation threshold, the electrically conductive critical exponent was neither a universal value nor a constant that increases with the CF concentration. The results also indicated that the backbone density of the CF decreased with increasing CF concentration. The mechanisms of backbone structure evolution with increasing CF concentration were presented. The experimental results showed that near the percolation threshold the backbone density is approximately 0.15, which agrees well with the simulation results.
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Details
- Title
- Percolation backbone structure analysis in electrically conductive carbon fiber reinforced cement composites
- Creators
- Ning Xie - School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaXianming Shi - Corrosion and Sustainable Infrastructure Laboratory, Western Transportation Institute, PO Box 174250, College of Engineering, Montana State University, Bozeman, MT 59717-4250, USADecheng Feng - School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaBoqiang Kuang - School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaHui Li - School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China
- Publication Details
- Composites. Part B, Engineering, Vol.43(8), pp.3270-3275
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900612855801842
- Language
- English
- Resource Type
- Journal article