Study of mechanisms of explosive spalling in high-strength concrete at high temperatures using acoustic emission
作者： Mitsuo Ozawa , Shinya Uchida , Toshiro Kamada , Hiroaki Morimoto
DOI: 10.1016/J.CONBUILDMAT.2012.06.070
关键词:
摘要: Mechanisms behind explosive spalling of high-strength concrete during a heating test were investigated on the basis of acoustic emission (AE) measurements of wet and air-dried specimens. The relation between the measured values of the internal temperature and vapour pressure and AE events produced by micro-cracking were investigated. It was found that AE events were indeed indicative of the state of the explosive failure process. Furthermore, b-value analysis was successfully applied to clarify the fracture process …
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