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Investigation of freeze–thaw deterioration effects on electrical properties and electric‑heating capability of CNT‑CF incorporated cement mortar KCI 등재

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Carbon Letters (Carbon letters)
한국탄소학회 (Korean Carbon Society)
초록

The present study investigates the impact of freeze–thaw deterioration on the electrical properties and electric-heating capabilities of cement mortar incorporating with carbon nanotubes (CNT) and carbon fibers (CF). Mortar samples, containing 0.5 wt.% CNT and 0.1 wt.% CF relative to the mass of cement, were prepared and subjected to freeze–thaw tests for up to 300 cycles. The electrical properties and electric-heating capability were evaluated every 30 freeze–thaw cycles, and the physicochemical characteristics of the samples were analyzed using X-ray diffraction and mercury intrusion porosimetry. The results indicate a decline in both electrical conductivity and heat-generation capability as the freeze–thaw cycles progress. Furthermore, changes in the pore structure of the mortar samples during the freeze–thaw cycles contributed to damage in the conductive network formed by CNT and CF, resulting in decreased electrical conductivity and heat-generation capabilities of the mortar samples.

목차
Investigation of freeze–thaw deterioration effects on electrical properties and electric-heating capability of CNT-CF incorporated cement mortar
    Abstract
    1 Introduction
    2 Sample preparation and test methods
        2.1 Materials and sample preparation
        2.2 Test methods
    3 Compressive strength and electrical properties of cement mortar samples deteriorated by freeze–thaw
    4 Heating performance of cement mortar samples deteriorated by freeze–thaw
    5 Hydration products and pore structure of cement mortar samples deteriorated by freeze–thaw
    6 Concluding remarks
    Acknowledgement 
    References
저자
  • H. N. Yoon(Construction Material Center, Construction Safety Research Institute, Korea Testing and Research Institute, 68, Gajaeul‑ro, Seo‑gu, Incheon 22829, Republic of Korea)
  • Won‑Taek Hong(Department of Civil and Environmental Engineering, Gachon University, 1342 Seongnam‑daero, Sujeong‑gu, Seongnam, Gyeonggi 13120, Republic of Korea)
  • Jongwon Jung(School of Civil Engineering, Chungbuk National University, 1 Chungdae‑ro, Seowon‑gu, Cheongju, Chungbuk 28644, Republic of Korea)
  • Chiyoung Park(Energy Science and Engineering, Daegu Gyeongbuk Institute of Science & Technology, 333, Techno jungang‑daero, Hyeonpung‑eup, Dalseong‑gun, Daegu, Republic of Korea)
  • 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