Effect of Fiber Reinforcement on Residual Properties of High-Strength Concrete Under EIevated Temerature

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Title: Effect of Fiber Reinforcement on Residual Properties of High-Strength Concrete Under EIevated Temerature

Author(s): T. Horiguchi, T. Takano, N. Saeki, and T. D. Lin

Publication: Special Publication

Volume: 209

Issue:

Appears on pages(s): 53-64

Keywords: density; fiber reinforced concrete; fire resistance; high-strength concrete; polypropylene fibers; explosive spalling; thermal diffusivity

Date: 9/26/2002

Abstract:
High-strength concrete shows particular characteristic behavior at ele- vated temperatures, such as explosive spalling, that is rarely observed in normal-strength concrete. This behavior has been attributed to the very dense concrete matrix usually associated with high-strength concrete. This paper presents the effect of fiber reinforcement on mitigation of explosive spalling and residual properties of high-strength concrete under elevated temperatures (600°C). The experimental work has been carried out on the influ- ence of three parameters associated with fire resistance. These three parameters are an addition of polypropylene fibers andor polymer beads, the moisture content of the concrete and the water to cement ratio. The experimental results showed that the internal temperature elevation was mitigated in the test specimens, that contained the fibers or beads, that were melted by heating, by low cement-water ratio and by high moisture content. The accompanying strains due to heating at these conditions were reduced in the test specimens.