Engineering Mechanics Institute Conference 2013

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Ductile Concrete using Structural Fibers

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Shane Palmquist
Western Kentucky University
United States

Trevor King
Western Kentucky University Student
United States

Leonardo Calheiros Rodrigues
Western Kentucky University Student
United States

Luiz Guilherme Tozzi Pego
Western Kentucky University Student
United States

Abstract:
Concrete is a brittle material, while steel is a ductile material. For design purposes, the tensile strength of concrete is assumed to be negligible since concrete is weak in tension. Reinforcing steel is added to concrete for this purpose. In recent years, materials like fiber-reinforced cementitious composites (HPFRCC) have been in development. HPFRCC are materials that are designed to behave much more ductile than traditional concrete. The components of HPFRCC are very similar to normal concrete, except no coarse aggregates are used and air entrainment is not necessary. Like concrete, HPFRCC is designed to be a cost effective building material having numerous potential applications, such as in buildings, bridges, and projects involving repair or rehabilitation work.

The focus of this paper is to present the results of HPFRCC mixes that have been developed based on work found in the literature with modifications based on experimentation of such mix designs using high performance PVA and steel fibers. Test specimens, including cylinders, cubes and beams, were cast and tested. Results show that HPFRCC test specimens behave in a much more ductile manner than specimens not containing any specialty fibers such as more traditional type concrete specimens.

 

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