SPALLING BEHAVIOR OF HIGH PERFORMANCE CONCRETE IN TEMPERATURE

Author(s): F. Delhomme, G. Debicki
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 616-625
Total Pages: 961
Language : English

Abstract: In a concrete exposed to high temperatures, two indissociable processes arise: a “thermo- mechanical” process in which the gradient of thermal deformation generates stresses within the material and a “thermo-hydral” process which generates driving force to put in movement vapour and liquid water. The last one induces a drying process at the surface and an increase of moisture inside the material which can also generate stresses within the material. Some spalling can appear for some kinds of concrete with low permeability and/or with a saturated material structure. To detect the explosive spalling sensibility of a concrete mixture, a simple test on spherical specimen is proposed and justified. To validate the method, an experimental investigation has been led. The studied mixtures are high performance concrete with or without polypropylene fibres.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00