THE MECHANICAL BEHAVIOR OF FIBER REINFORCED HIGH PERFORMANCE SELF COMPACTED CONCRETE AT HIGH TEMPERATURES

Badawy, A. A. M.; Seleem, M. H.; Gabal, A. E. K.; El Shihy, A. M.

doi:10.21608/erjm.2011.67283

THE MECHANICAL BEHAVIOR OF FIBER REINFORCED HIGH PERFORMANCE SELF COMPACTED CONCRETE AT HIGH TEMPERATURES

Document Type : Original Article

Authors

¹ Materials Engineering Dept., Faculty of Engineering, Zagazig, Egypt

² Structural Engineering Dept., Faculty of Engineering, Zagazig, Egypt

10.21608/erjm.2011.67283

Abstract

In this paper, an experimental work was carried out to study the effect of high temperatures on the strength of high-performance self compacting concrete (HPSCC). Four concrete mixes were investigated. The first mix represented HPSCC without fibers. The second mix represented HPSCC including steel fibers. The third mix represented HPSCC including steel and micro-polypropylene fibers. The fourth mix represented HPSCC including steel, polypropylene and polyolefin fibers. Compressive, tensile and flexural strengths were measured at room temperature (RT) and after exposure to high temperatures of 200^oC, 400^oC, 600^oC and 750^oC for 2 hours. The residual unstressed test method was followed. Microscopic examination was performed on concrete samples from the four mixes at RT and after exposure to high temperatures. The results showed that incorporating hybrid fibers seems to be a promising way to enhance the resistance of HPSCC to thermally induced explosive spalling and increase the residual strengths.

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