Swedish recommendations for preventing fire spalling in concrete structures for civil engineering purposes

Title: Swedish recommendations for preventing fire spalling in concrete structures for civil engineering purposes
Author(s): J. Silfwerbrand
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: 427 - 433
Total Pages: 7
Nb references: 11
Language: English

Abstract: Explosive spalling may occur in moist, impermeable concrete structures exposed to fire.
Present knowledge implies that conventional concrete usually does not spall whereas high performance concrete (HPC) and self-compacting concrete (SCC) usually do since they normally are impermeable. An increased use of HPC and SCC demands more research in this area and recommendations to prevent explosive spalling. In 2003, the Swedish Concrete Association established a committee to develop guidelines for preventing explosive spalling in concrete structures exposed to fire. In May 2004, the committee published the first preliminary guidelines. From 2004, the committee has carefully followed the progress of two large experimental research programs on concrete exposed to fire. The test results were available in 2008, and the committee has used them to develop the guidelines. The guidelines contain both a chart indicating when polypropylene fibres or other measures are needed in order to prevent spalling and a table expressing the amount of fibres needed for different cases. Furthermore, the recommendations cover a description of the phenomenon, a summary of factors influencing spalling based on Swedish and international test results, mechanical and durability properties of concrete containing polypropylene fibres, a description of test methods, practical considerations based on Swedish experience gathered, e.g., in the City Tunnel project in Malmö, and a list of research needs.

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