Hybrid polypropylene-steel fiber reinforced concrete at high temperatures

Title: Hybrid polypropylene-steel fiber reinforced concrete at high temperatures
Author(s): Sara Cattaneo, Gianpaolo Rosati, Gianluca Guerrini
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 15
Language: English

Abstract: Extreme environmental conditions, such as exposure to high temperatures, are serious potential risks for buildings and structures. The behavior of concrete, after exposure to a high temperature, depends upon the specific concrete mix proportions, the constituents used and the physicochemical transformations that the heating generates. Within this context, the damage, after thermal treatments, in cement-based matrices was studied using compression and three-point bending tests. Four types of cement based composites were constructed using fiber combinations of polypropylene and steel fibers. The maximum temperature reached using an electric furnace was 750°C. Intermediate temperatures were set at 250 and 500 °C. Compressive and bending strengths, were determined and fracture behavior was studied using interferometric measurements. For the considered combinations, it was demonstrated that a hybrid combination of steel and polypropylene fibers appears to be not particularly effective in enhancing the performance of concrete at high temperatures. Explosive spalling was not observed in concrete specimens during the thermal treatment.

Online publication: 2004-03-25
Classification: Applications
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.096

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