Electrical characteristics of cement composites incorporating CNT and carbon fibers

G.M. Kim, S.M. Park, G.U. Ryu, H.K. Lee
Korea Advanced Institute of Science and Technology,
Korea

Keywords: carbon nanotube, carbon fiber, cement composite, electrical resistivity

Summary:

Abstract: This paper summarizes a portion of an experimental work conducted by the authors [1] to investigate the electrical characteristics of cement composites incorporating CNT and carbon fibers. The dispersion agents used in the present study were silica fume and polycarboxylate-type superplasticizer. The CNT content added to cement composites was fixed at 0.5 % by the weight of cement, while the carbon fiber content added to the composites were varied from 0.0 to 0.5 wt%. The electrical resistance of cement composites incorporating CNT and carbon fibers were measured by the two probe method and the effects of carbon fiber content and water to cement ratio on the electrical resistivity of the composites were systemically investigated. The test results showed that the addition of carbon fibers to the cement composites incorporating CNT improved the stability of the electrical characteristics of the composites. Details of the test results will be presented. Acknowledgement: This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science, ICT & Future Planning) (NRF-2015R1A2A1A10055694). Reference [1] Kim, G.M., Park, S.M., Ryu, G.U., and Lee, H.K. (2016). Electrical characteristics of hierarchical conductive pathways in cementitious composites incorporating CNT and carbon fiber. Cement and Concrete Composites, under review