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Monitoring of fire damage processes in concrete by pore pressure and acoustic emission measurements



Title: Monitoring of fire damage processes in concrete by pore pressure and acoustic emission measurements
Author(s): F. Pereira, K. Pistol, M. Korzen, F. Weise, P. Pimienta, H. Carré, S. Huismann
Paper category : conference
Book title: 2nd International RILEM Workshop on Concrete Spalling due to Fire Exposure
Editor(s): E.A.B. Koenders and F. Dehn
ISBN: 978-2-35158-118-6
e-ISBN: 978-2-35158-119-3
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 69 - 77
Total Pages: 9
Nb references: 8
Language: English


Abstract: This paper presents the combined use of acoustic emission (AE), gas pore pressure and temperature measurements (PT). The simultaneous application of both techniques represents a new methodology in the context of fire spalling and contributes to a better understanding of the mechanisms of fire spalling, particular with regard to the interaction of micro cracking and pore pressure evolution. The study presents fire tests on normal strength concrete specimens with and without reinforcement at ISO standard fire and at hydrocarbon (HC) fire.
Supported by AE-analysis, it can be shown that due to the higher heating rate of the HC-fire in comparison to the ISO standard fire the damage processes inside the concrete during the exposure are increased combined with augmenting the concrete permeability. As a consequence lower pore pressures were measured. However, despite the lower pore pressures, explosive spalling was observed.


Online publication: 2012-01-17
Publication type : full_text
Public price (Euros): 0.00