Resumo

CARRILLO, Julián; CARDENAS PULIDO, Jhon  e  APERADOR CHAPARRO, William. Effect of chloride ion on the compressive mechanical properties of RC-65/35-BN steel fiber reinforced concrete. Ing. Desarro. [online]. 2015, vol.33, n.2, pp.149-171. ISSN 0122-3461.  https://doi.org/10.14482/inde.33.2.7075.

The influence of two corrosive environments on a short term and the fiber dosage on the compressive mechanical properties of rc-65/35-bn steel fiber reinforced concrete, sfrc, is assessed in this study. The experimental program comprised the test of 54 cylindrical-type sfrc specimens having steel fibers characterized by a length/diameter ratio of 65 and fiber dosages of 30 and 60 kg/m³. Regarding the exposure environments, 18 cylinders _{Q Q} were subjected to the action of a watery environment, 18 cylinders were "§ "§ subjected to an environment of 3.5 % NaCl solution (chloride ion) and 18 ^ ^ cylinders were kept in unaltered conditions, during 60 days. A reduction of 2 % in the compressive strength, a decrease of 6 % in the modulus of elasticity, and an increase of 13 % in the Poisson's ratio of the sfrc was observed for this phase of corrosion initiation. These results demonstrated that, on a short time, the corrosive environments do not affect significantly the mechanical properties under compressive stresses of the sfrc used in this study.

Palavras-chave : steel fiber reinforced concrete; chloride ion; compressive strength; modulus of elasticity; Poisson ratio.

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