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Open AccessArticle

Durability of Recycled Steel Fiber Reinforced Concrete in Chloride Environment

1
ISISE, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
2
ISISE, Department of Civil Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
3
ICIST, Department of Civil Engineering and Architecture, Technical University of Lisbon, 1649-004 Lisbon, Portugal
*
Author to whom correspondence should be addressed.
Fibers 2019, 7(12), 111; https://doi.org/10.3390/fib7120111
Received: 30 September 2019 / Revised: 6 December 2019 / Accepted: 9 December 2019 / Published: 16 December 2019
For structural elements exposed to chloride environments, an important aspect of Recycled Steel Fiber Reinforced Concrete (RSFRC) durability is the corrosion resistance. In the present work, an experimental program was carried out to evaluate the long-term effects of chloride attack on the post-cracking behavior of RSFRC by performing splitting tensile tests and round panel tests. Two RSFRC mixtures defined based on the packing density optimization were produced with a fiber content of 0.8% and 1% per volume of concrete. The influence of different periods of chloride immersion was investigated, as well as the influence of fiber dispersion at crack surfaces of the specimens. Additionally, a simplified prediction of the long-term chloride penetration depth into uncracked RSFRC under immersion aggressive chloride exposure conditions was estimated. The RSFRC revealed high susceptibility to surface corrosion under the chloride exposure conditions adopted. However, the post-cracking resistance of RSFRC was not significant affected. The addition of RSF had a negligible effect in the diffusion of chloride ions into concrete, and the critical chloride content was higher than that found in conventional reinforced concrete structures. View Full-Text
Keywords: recycled steel fiber reinforced concrete (RSFRC); post-cracking behavior; durability; chloride attack; splitting tensile test; round panel test recycled steel fiber reinforced concrete (RSFRC); post-cracking behavior; durability; chloride attack; splitting tensile test; round panel test
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MDPI and ACS Style

Frazão, C.M.V.; Barros, J.A.O.; Bogas, J.A. Durability of Recycled Steel Fiber Reinforced Concrete in Chloride Environment. Fibers 2019, 7, 111.

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