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Mechanical characteristics of fiber reinforced self-compacting concretes exposed to elevated temperatures



Title: Mechanical characteristics of fiber reinforced self-compacting concretes exposed to elevated temperatures
Author(s): K. K. Sideris, P. Manita and E. Tsanaktsidis
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: 165 - 172
Total Pages: 8
Nb references: 35
Language: English


Abstract: In this paper, the studies concern the influence that polypropylene fibres have on the properties of SCC of different strength classes when exposed to elevated temperatures. A total of four different SCC and two normal concrete mixtures were produced. The strength classes of the mixtures were C25/30 and C30/37.
The specimens produced were placed at the age of 180 days in an electrical furnace which is capable to reach 300 0C at 30 minutes and 600 0C at 70 minutes. When the maximum temperature was reached, it was maintained for one hour. Then the specimens were let to cool in the furnace. The properties measured after fire exposures were the compressive strength, splitting tensile strength and water capillary absorption.
It was noticed that, the spalling tendency was increased for specimens of higher strength class C30/37 irrespective of the mixture type (SCC or NC). Such an explosive behavior was not observed when polypropylene fibers were added in the mixtures; however, in this case the residual mechanical characteristics of concretes were significantly reduced.


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