A master thesis from Aalborg University
Spalling Mechanism in Concrete Exposed to Elevated Temperatures
Author(s)
Term
4. term
Education
Publication year
2013
Submitted on
2013-08-15
Pages
83 pages
Abstract
This report presents the description of the spalling mechanism of a concrete member exposed to fire. The theory behind the phenomenon is explained along with failure due to different types of loading and also the fire behavior of high performance concrete (HPC), self-compacting concrete (SCC) and high strength concrete (HSC) based on experimental results. Concrete properties and comportment in fire are presented in order to further on use them for modeling a simplified physical model. The physical model is divided into a thermo-hygral (taking into account the mass and heat transport process) and a mechanical model (accounting for developing of thermal and shrinkage strains). Following these ideas, a mathematical model and later on a 1-D numerical model are provided. The results validate some of the theoretical assumptions made in the beginning. In the end, conclusions and recommendations for further development are made based on the whole report.
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