Predicción de la vida útil en servicio de edificios de 50 años expuestos a ambientes marinos

Agustín Sánchez-Deza; David M. Bastidas; Angel La Iglesia; Eleuterio M. Mora; José M. Bastidas

doi:10.3989/revmetalm.111

Authors

Agustín Sánchez-Deza Naval Engineering School, Polytechnic University of Madrid (UPM) https://orcid.org/0000-0003-4078-9010
David M. Bastidas National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA. Dept. of Chemical and Biomolecular Engineering. The University of Akron https://orcid.org/0000-0002-8720-7500
Angel La Iglesia Institute of Geosciences (IGEO, CSIC), UCM https://orcid.org/0000-0002-2026-4279
Eleuterio M. Mora Naval Engineering School, Polytechnic University of Madrid (UPM) https://orcid.org/0000-0002-9093-9542
José M. Bastidas National Centre for Metallurgical Research (CENIM, CSIC) https://orcid.org/0000-0001-9616-0778

DOI:

https://doi.org/10.3989/revmetalm.111

Keywords:

Chloride, Concrete corrosion cracking, Expansive stress, Marine environment, Rust layer

Abstract

Steel reinforcing bars are often coated with rusts formed during service in reinforced concrete (RC) structures. Rust layers growing on steel rebars induce expansive stresses and cause cracking on cover concrete. This study uses steel corrosion rate results measured on reinforced concrete buildings of more than 50 years of age located in marine environments and considers the pressure generated by the volume expansion of corrosion product layers to calculate the service life of the RC structures using a numerical simulation, estimating the time to corrosion cracking of the concrete cover. Akaganeite, goethite, lepidocrocite, hematite, magnetite and maghemite were identified by X-ray diffraction as crystalline phase constituents of the rust layers.

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