In the present study, the effects of electrodes type (copper, steel or CFRP) and design (plate or mesh) on electrical stability of conductive cement as exposed to various weathering conditions were investigated. To fabricate these composites, multiwalled carbon nanotube and carbon fiber were added to the cement composites by 0.6 and 0.4% by cement mass. Seven different types of electrodes were embedded to the samples, and their electrical stability was examined during the curing period. In addition, the fabricated samples were exposed to water ingress and cyclic heating conditions. Then, the compressive strength of the samples was evaluated to observe the interfacial bonding between the cement paste and electrodes. Based on the experimental results, it was found that the samples showed different electrical stability even their mix proportion was same. Thus, it can be concluded that the type and design of the electrodes are important in measuring the electrical properties of the conductive cement composites. Specifically, an improved electrical stability of electrodes is required when they are exposed to various weathering conditions.

Effects of electrodes type and design on electrical stability of conductive cement as exposed to various weathering conditions
    Abstract
    1 Introduction
    2 Experimental program
    3 Result and discussion
        3.1 Electrical resistance changes during curing period
        3.2 Exposure to water ingress condition
        3.3 Exposure to high temperature
        3.4 Compressive strength
    4 Conclusion
    Acknowledgements 
    References

• Daeik Jang(Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA)
• Beomjoo Yang(School of Civil Engineering, Chungbuk National University, 1 Chungdae‑ro, Seowon‑gu, Cheongju, Chungbuk 28644, Republic of Korea) Corresponding author
• Giljae Cho(Khanstone P&D Team, Hyundai L&C, 37 Buganggeumho‑ro, Bugang‑myeon, Sejong 30074, Republic of Korea, Alpha Quartz, Phu Tho Lot D3‑1 Trung Ha Industrial Park, Tam Nong, Vietnam)