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Explosive spalling of concrete materials under extreme environments



Title: Explosive spalling of concrete materials under extreme environments
Author(s): Kaspar Willam, Keun K. Lee, Yunping Xi, G. Xotta, and V. Salomoni
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: 227 - 236
Total Pages: 10
Nb references: 5
Language: English


Abstract: This paper describes recent findings of an experimental and computational program to investigate the effect of mismatch when concrete materials are subjected to rapid heating and drying. The main focus are interaction effects in heterogeneous composites when the constituents with different thermal expansion and hygral shrinkage properties are subjected to severe environmental load scenarios. This paper addresses the question, whether spalling in concrete materials is caused (a) by the contrast of constituent material properties, or (b) by thermal-shock-induced stability aspects of subdomains subjected to compression. This discussion reaches beyond the traditional arguments of thermal stress spalling due to restrained thermal expansion, or due to pore pressure spalling caused by the phase change of the free pore water under high temperature.


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