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Coupled Effect Of High Temperature And Heating Time On The Residual Strength Of Normal And High-strength Concretes

Submitted2009-08-30
Last Update2009-08-30
TitleCoupled Effect Of High Temperature And Heating Time On The Residual Strength Of Normal And High-strength Concretes
Author(s)Author #1
Author title:
Name: B. Toumi
Org: Larbi Ben M'hidi University, Oum El Bouaghui, Algeria
Country:
Email:

Author #2
Author title:
Name: M. Resheidat
Org: Jordan University of Science & Technology, Irbid, Jordan
Country:
Email: musaresheidat@yahoo.com

Author #3
Author title:
Name: Z. Guemmadi
Org: Dept. of Civil Engineering, University Mentouri, Constantine, Algeria
Country:
Email:

Author #4
Author title:
Name: H. Chabil
Org: Dept. of Civil Engineering, University Mentouri, Constantine, Algeria
Country:
Email:

Other Author(s)
Contact AuthorAuthor #2
Alt Email: musaresheidat@yahoo.com
Telephone:
KeywordsHPC, Effect of heat, Concrete strength, Temperature, Fibers, Fire.
AbstractThis paper is part of a present research that leads to estimate the level of concrete degradation properties altered by high temperatures, especially by using the maturity concept. In order to evaluate the coupled effect of high temperature and heating time on the residual strength of concrete, a series of compressive and indirect tensile tests was performed on normal and high strength concretes. The effect of incorporating polypropylene fibers in high strength concretes was also investigated. Cubical concrete specimens were exposed to different target high temperatures (100, 300, 500 and 700 �C) for 3, 6 and 9 hours and then cooled in air. Compressive and flexural strengths of these concrete samples were compared with each other and with the unheated samples. Experimental results indicate that concrete strength decreases with increasing temperature and heating time. The grade of concrete affects the residual compressive and flexural strength; the decrease in the strength of ordinary concrete is more than that in High Performance Concrete (HPC), the effect being more pronounced as the heating time increases. Polypropylene fibers were found to have a beneficial effect on residual strength of HPC at least at high temperatures over their melting and vaporization.
Paperview paper 86.pdf (163KB)

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