Spalling under fire of ultra-high performance fibre concrete: Effect of polymer fibers
ABSTRACT: This article presents the first part of a study concerning the behaviour of ultra-high performance fibre concrete (UHPFC) under fire. Four kinds of synthetic fibres were added: polypropylene (PP), acrylic (PMMA), polyvinyl acetate (PVA) and polyethylene (PE). After a mechanical characterization of the material, blowtorch tests were performed on it. The expected efficiency of PP and PE fibres was observed. Microscopic observations enabled us to put forward a hypothesis regarding the efficiency of fibres in concrete.