Resumo

CARRILLO, Julián  e  SILVA-PARAMO, Diego. Flexural Tests of Concrete Slabs-on-Ground Reinforced with Steel Fibers. Ing. invest. y tecnol. [online]. 2016, vol.17, n.3, pp.317-330. ISSN 2594-0732.

Steel fiber reinforced concrete (SFRC) has become a solution to improve the concrete performance and to optimize the construction systems. The paper shows and discusses the results of an experimental program aimed at studying the flexural performance of concrete slabs-on-ground reinforced with steel fibers to be used in housing. The experimental program included flexural tests of eight 600-mm square concrete slabs having thickness of 100 mm; six slabs with three different contents of steel fibers (5, 9 and 18 kg/m3, two slabs for each fiber content), and two slabs of plain concrete. Compressive, elasticity modulus, splitting tensile and flexural test of 36 standard cylinders and 12 standard beam specimens were carried out to characterize the mechanical properties of concrete. The paper includes the discussion of not only the correlations between mechanical properties and design parameters of steel fiber reinforced concrete, but also the load- and toughness-deflection curves of concrete slabs reinforced with different contents of steel fibers. Results demonstrated that, except of peak strength, deflections at peak and ultimate load, and toughness at failure of slabs increased significantly as the fiber content augmented.

Palavras-chave : slabs-on-ground; steel fibers; fiber content; flexural test; toughness.

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