A Method for Instant Estimation of the Temperature Experienced by Fire-Damaged Reinforced Concrete Structures Using Titanium
Department of Architecture Engineering, Daejin University, Gyeonggi-do 11159, Korea
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Materials 2020, 13(8), 1993; https://doi.org/10.3390/ma13081993
Received: 20 March 2020
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Revised: 22 April 2020
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Accepted: 22 April 2020
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Published: 24 April 2020
(This article belongs to the Special Issue Structural Health Monitoring for Civil Engineering Materials)
When a concrete structure is exposed to fire, its structural safety is significantly compromised due to the spalling of members and scaling of concrete. In addition, its durability is substantially reduced due to certain chemical changes such as the dehydration of Ca(OH)2, the main hydration product of concrete, and the rehydration of CaO. Therefore, when fire damage occurs to a reinforced concrete (RC) building, rapid diagnosis and evaluation techniques are required for immediate repair and reinforcement, requiring a crucial step of quantitatively determining the heating temperature. This study aims to demonstrate a method of estimating the heating temperature experienced by fire damaged RC buildings. The experiments utilized two short RC column specimens with embedded titanium strips. The discoloration characteristics of titanium at high temperatures provided a quick, accurate, and simple mechanism for the estimation of the heating temperature by depth. Empirical equations were derived to estimate the heating temperature as a function of the discoloration characteristics of titanium. Thereafter, a comparison of this estimated temperature with the actual heating temperature measured using thermocouples revealed an average error of less than 20 °C, thereby demonstrating a significantly good correlation and an extremely high reliability of the proposed method.
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MDPI and ACS Style
Sim, S.-R.; Ryu, D.-W. A Method for Instant Estimation of the Temperature Experienced by Fire-Damaged Reinforced Concrete Structures Using Titanium. Materials 2020, 13, 1993. https://doi.org/10.3390/ma13081993
AMA Style
Sim S-R, Ryu D-W. A Method for Instant Estimation of the Temperature Experienced by Fire-Damaged Reinforced Concrete Structures Using Titanium. Materials. 2020; 13(8):1993. https://doi.org/10.3390/ma13081993
Chicago/Turabian StyleSim, Sang-Rak, and Dong-Woo Ryu. 2020. "A Method for Instant Estimation of the Temperature Experienced by Fire-Damaged Reinforced Concrete Structures Using Titanium" Materials 13, no. 8: 1993. https://doi.org/10.3390/ma13081993
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