Resumo

CARRILLO, Julián; APERADOR, William  e  GONZALEZ, Giovanni. Correlations Between Mechanical Properties of Steel Fiber Reinforced Concrete. Ing. invest. y tecnol. [online]. 2013, vol.14, n.3, pp.435-450. ISSN 2594-0732.

Tension strength and post-cracking deformation capacities that exhibits steel fiber reinforced concrete (SFRC) stimulate its use in elements governed by shear deformations. Aimed at developing design aids that promote the use of SFRC as web shear reinforcement of concrete walls for low-rise economic housing (LEH), an experimental study for describing the mechanical properties of SFRC was carried out. The experimental program included testing of 128 cylinder- and beam-type specimens. According to requirements specified by ACI-318, to thickness of walls used in LEH, and to results of previous studies, three Dramix fibers with length-diameter ratios of 55, 64 and 80 were selected. Fiber dosage was expressed in terms of the minimum fiber dosage specified by ACI-318 for replacing the minimum area of conventional shear reinforcement in beams (60 kg/m³). Therefore, five dosages were used: 0, 40, 45, 60 and 75 kg/m³. Mechanical properties of SFRC under compressive, tensile and flexural stresses were evaluated in this study. Based on trends of experimental results, numerical correlations for estimating both basic mechanical properties and properties that describe flexural performance of SFRC are proposed.

Palavras-chave : fiber reinforced concrete; steel fibers; housing; mechanical properties; compression; tension; flexural; toughness.