Abstract

MEZA DE LUNA, Alejandro et al. Experimental mechanical characterization of steel and polypropylene fiber reinforced concrete. Rev. Téc. Ing. Univ. Zulia [online]. 2014, vol.37, n.2, pp.106-115. ISSN 0254-0770.

This paper presents the results about the mechanical characterization of steel and polypropylene fiber reinforced concrete to be used in industrial ground floor slabs, assessing parameters such as compressive strength, modulus of elasticity, compressive toughness, flexural strength, flexural toughness, flexural residual strength and fracture energy. The characterization plan consisted in manufacturing cylindrical and prismatic specimens of fiber reinforced concrete, including nine types of fibers: five of steel and four synthetic or polypropylene. Also, non-reinforced concrete samples were mixed as a reference, based on a design of 40 MPa flexural strength concrete used for industrial ground floor slabs. Based on the results, it was observed that the shape and length of fibers have influence over flexural strength development and over some other concrete mechanical properties as ductility, since concrete samples made with steel fibers with hooks in its extremes showed a better adherence to concrete, while straight copolymer fiber and wavy polymer fiber showed a better general performance. Finally, it was observed a good correlation between compression toughness values and flexural ones.

Keywords : fiber reinforced concrete; steel fibers; synthetic fibers; industrial ground floor slabs; mechanical properties.

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