Fire resistance of concretes exposed to high temperatures

Author(s): D. Pasla
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 94 – 95
Total Pages: 2
Language: English

Abstract: 
In this paper, the performance of concrete exposed to high temperatures was discussed. The fire resistance properties of concretes were improved by adding polypropylene fibres. An experimental program was designed, in which different types of concrete were investigated including Normal Strength Concrete (NSC), High Strength Concrete (HSC) and Fibre Reinforced Concrete (FRC). The normal concrete was designed without any mineral additions. The high strength concrete was designed with metakaolin (MK). In both the normal and high strength concretes polypropylene fibers at 0.9 kg/m3 were also added. The effects of incorporating Metakaolin (MK) and Polypropylene fibre (PP) were also investigated. Spalling was the most critical phenomenon that occurred in concrete specimens that occurred when exposed to high temperatures. The addition of polypropylene fibres slightly enhanced the residual strength of concrete manufactured using Portland cement but not that of MK concrete. PP mitigated the spalling and the explosive behavior of MK concrete. It was also found that by adding PP fibres with the ratio of 0.9 kg/m3 the fire resistance of the concrete samples improved and the brittle behavior of the concrete also transited towards ductile.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00