Pyropermittivity as an emerging method of thermal analysis, with application to carbon fibers

Xi, Xiang; Chung, D.D.L.

doi:10.1007/s10973-022-11240-8

Cited by 6 publications

(2 citation statements)

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“…Piezopermittivity, [2,3], refers to the change in permittivity when stress is applied [2,3]. Whereas, the variation of permittivity with temperature is referred to as pyropermittivity and is important for temperature sensing [4].…”

Section: Introductionmentioning

confidence: 99%

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A novel method for temperature self-sensing of reinforced concrete

Ozturk

2024

Phys. Scr.

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In this work, a temperature-sensing reinforced concrete has been developed using capacitance and resistance-based measurements. No additives are required for self-temperature sensing. Steel bars in the reinforced concrete are used as electrodes. To determine the self-sensing properties of the reinforced concrete specimen, it is cooled from room temperature to -9°C and heated from room temperature until it reaches 50.9°C. The varying capacitance and resistance values of the sample concerning temperature changes are evaluated. Fractional changes in capacitance and resistance upon cooling are 80.6% and 276%, respectively. Fractional changes in capacitance and resistance upon warming are 60% and 35%, respectively. Temperature coefficients of capacitance and resistance (fractional change in capacitance and resistance per unit change in temperature) upon cooling are 2.5 × 10-2/°C and 8.6 × 10-2/°C, while upon warming they are 2.2 × 10-2/°C and 1.3 × 10-2/°C. This study aims to use capacitance and resistance-based sensing techniques to detect temperature variations in steel-reinforced concrete structures. Further studies are planned to investigate various factors such as moisture, porosity, aggregate proportion, and water content that affect the self-temperature-sensing performance of reinforced concrete.

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Section: Introductionmentioning

confidence: 99%

“…In previous studies, capacitance-based self-temperature sensing has been reported for materials like carbon fiber [4], graphite [20], and cement paste [21]. However, there is a lack of such research for reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%