Study on the Temperature-Sensitive Properties of Carbon Fiber-Reinforced Mortar

Abstract:

Carbon fiber (~5mm long)-reinforced mortar is found to be an effective thermal sensor. In this paper, relations between temperature change and resistivity of carbon fiber- reinforced mortar (CFRM for short) with different carbon fiber contents (0.4%~1.2% by mass of cement) are studied. The results show that during the initial period, the resistivity decreases when the temperature increases (Negative Temperature Coefficient effect). After the temperature reaches a certain value, the resistivity increases when the temperature increases (Positive Temperature Coefficient effect). Besides, with the change of carbon fiber content, the transit temperature of NTC/ PTC effect also changes. Based on the experimental results, the CFRM shows a potential use as a thermal sensor. The mechanisms of temperature- sensitive properties and NTC/ PTC transition are also discussed.

• Periodical: Materials Science Forum (Volumes 675-677)
• Pages: 1167-1170
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.675-677.1167
• Online since: February 2011
• Authors: Xiao Yan Liu, Ai Hua Liu, Feng Wei, Wu Yao
• Keywords: NTC Effect, PTC Effect, Resistivity, Sensor, Temperature-Sensitive Properties

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