Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance of Some Self Compacting Concretes When Exposed to Fire
The objective with the study was to examine the behavior of self compacting concrete when exposed to fire and compare the results with those of normal concrete. Twelve different types of self compacting concretes as well as four different conventional vibrated concretes have been fire tested. The results from the study showed that the examined self compacting concretes got explosive spalling if no precaution such as polyprophylene fibers was used. By adding polypropylene fibers in the admixture the amount of spalling could be reduced and the same level of spalling as that for normal concrete was achieved. When comparing concrete with glass filler and limestone filler the latter spalled more. If this is due to different water-powder ratio or the filler material is not clear. The results indicate a linear relation between the amount of spalling and the water-powder ratio. Since the study was very limited in the amount of test material and the very extensive spalling obtained, it is important to continue the research on the behavior of self compacting concrete when exposed to fire. It is difficult to draw any conclusions from this study on how to manufacture self compacting concrete to obtain a certain fire resistance. Nevertheless, the investigation shows that it is possible by for example using polypropylene fibers to produce self compacting concrete with behavior similar to that of conventional vibrated concrete.
Performance of Some Self Compacting Concretes When Exposed to Fire
The objective with the study was to examine the behavior of self compacting concrete when exposed to fire and compare the results with those of normal concrete. Twelve different types of self compacting concretes as well as four different conventional vibrated concretes have been fire tested. The results from the study showed that the examined self compacting concretes got explosive spalling if no precaution such as polyprophylene fibers was used. By adding polypropylene fibers in the admixture the amount of spalling could be reduced and the same level of spalling as that for normal concrete was achieved. When comparing concrete with glass filler and limestone filler the latter spalled more. If this is due to different water-powder ratio or the filler material is not clear. The results indicate a linear relation between the amount of spalling and the water-powder ratio. Since the study was very limited in the amount of test material and the very extensive spalling obtained, it is important to continue the research on the behavior of self compacting concrete when exposed to fire. It is difficult to draw any conclusions from this study on how to manufacture self compacting concrete to obtain a certain fire resistance. Nevertheless, the investigation shows that it is possible by for example using polypropylene fibers to produce self compacting concrete with behavior similar to that of conventional vibrated concrete.
Performance of Some Self Compacting Concretes When Exposed to Fire
L. Bostroem (Autor:in)
2002
44 pages
Report
Keine Angabe
Englisch
Construction Materials, Components, & Equipment , Construction Equipment, Materials, & Supplies , Structural Analyses , Spalling , Structured dynamics , Concretes , Research , Thermal conductivity , Fiber reinforced concrete , Polypropylene , Explosions , High temperature , Fire , Fire resistance , Testing , Measurements , Tables(Data) , Graphs , Foreign technology , Self compacting concrete , Water-powder ratio
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