Abstract
After a building fire, damages suffered by the structure are evaluated to determine whether the building remains suitable for use. It is vital for fire damage evaluation to be performed quickly and precisely. In addition, it is necessary to thoroughly analyze concrete degradation, which is influenced by heating time and heating temperature. In this study, high-strength concrete was heated at 400, 500 and 600 â for 30, 60, 90, and 120 minutes respectively, to analyze the high-temperature characteristics of high-strength concrete in relation to heating temperature and heating time. Results indicate that the residual cleavability tensile strength of the concrete decreased by 6% at 400 ~ 500 â, and 46% at 500 ~ 600 â. Moreover, microstructure analysis showed that the decomposition of calcium hydroxide at 600 oC increased rapidly from the 60-minute point. Keywords: Concrete, High Temperature, Repair, Reinforcement, Fire Damage Assessment
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