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SUMMARY:Insight into the fire spalling behaviour of concrete and challenge
 s of its experimental assessment. - Marcus Maier (University of Cambridge)
DTSTART:20200515T140000Z
DTEND:20200515T150000Z
UID:TALK142318@talks.cam.ac.uk
CONTACT:Dr Maria Marques de Carvalho
DESCRIPTION:Fire accidents result in a rapid increase of temperature espec
 ially in underground structures such as tunnels where temperatures of 1400
  °C within 5 min can occur. This leads to severe damage of concrete due t
 o strength loss and explosive fire spalling. The prediction of the process
  and final extent of explosive spalling is crucial for the designing and r
 etrofitting of structures but accurate models and experimental procedures 
 are still lacking.\n\nIn this presentation we will talk about the challeng
 es of fire testing and address the following:\n\nThe application of the th
 ermal loading in fire tests is of crucial importance\, as the temperature 
 history strongly affects the risk and extent of explosive spalling.\nThe r
 ange of material and environmental properties present in real-life situati
 ons needs to be captured and considered for the experimental planning of f
 ire tests.\n\nFurthermore\, we will discuss results obtained from fires te
 st on different concrete mixtures and try to answer the following question
 s:\n\nIs it possible to identify key parameters triggering explosive spall
 ing?\nHow does the water content and the permeability influence spalling?\
 nHow can we proceed to assess the risk and extent of spalling?\n
LOCATION:Zoom (email structures-admin@eng.cam.ac.uk for link)
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