Experimental Studies on the Fire Behaviour of High Performance Concrete Thin Plates

Hulin, Thomas, Maluk, Cristian, Bisby, Luke, Hodicky, Kamil, Schmidt, Jacob W and Stang, Henrik (2015) Experimental Studies on the Fire Behaviour of High Performance Concrete Thin Plates. Fire Technology, . doi:10.1007/s10694-015-0486-x

Author Hulin, Thomas
Maluk, Cristian
Bisby, Luke
Hodicky, Kamil
Schmidt, Jacob W
Stang, Henrik
Title Experimental Studies on the Fire Behaviour of High Performance Concrete Thin Plates
Journal name Fire Technology   Check publisher's open access policy
ISSN 0015-2684
Publication date 2015-05-14
Year available 2015
Sub-type Article (original research)
DOI 10.1007/s10694-015-0486-x
Open Access Status Not Open Access
Total pages 23
Place of publication New York, United States
Publisher Springer
Language eng
Abstract In recent decades, the use of structural high performance concrete (HPC) sandwich panels made with thin plates has increased as a response to modern environmental challenges. Fire endurance is a requirement in structural HPC elements, as for most structural elements. This paper presents experimental investigations on the fire behaviour of HPC thin plates (20 or 30 mm thick) being used in lightweight structural sandwich elements. Tests were undertaken using a standard testing furnace and a novel heat-transfer rate inducing system (H-TRIS), recently developed at the University of Edinburgh. The parametric assessment of the specimen performance included: thickness of the specimen, testing apparatus, and concrete mix (both with and without polypropylene fibres). The results verified the ability of H-TRIS to impose an equivalent thermal boundary condition to that imposed during a standard furnace test, with good repeatability, and at comparatively low economic and temporal costs. The results demonstrated that heat induced concrete spalling occurred 1 to 5 min earlier, and in a more destructive manner, for thinner specimens. An analysis is presented combining the thermal material degradation, vapour pore pressure, stress concentrations, and thermo-mechanical energy accumulation in the tested specimens. Unexpectedly, spalling at the unexposed surface was observed during two of the tests, suggesting a potentially unusual, unwanted failure mode of very thin-plates during fire. On this basis it is recommended to favour 30 mm thick plates in these applications, since they appear to resist spalling better than those with 20 mm thickness.
Keyword High-performance concrete
Heat-induced concrete spalling
Thin plates
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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