Resumen

RINCON ZAMBRANO, Diego Andrés; GUERRA MERA, Juan Carlos  y  CASTANEDA VALDES, Abel. ANALYSIS OF ATMOSPHERIC CORROSION AFFECTIONS ON REINFORCED CONCRETE STRUCTURES IN CRUCITA, PORTOVIEJO, MANABÍ, ECUADOR. Rev. CENIC Cienc. Quím. [online]. 2025, vol.56, pp. 1-23.  Epub 02-Mar-2025. ISSN 2221-2442.

A study on atmospheric corrosion affectations analysis in 10 reinforced concrete structures located at different distances from the coastline in Crucita, Manabí, Ecuador was carried out. To define the type of service life of the structures was the main objective. Compressive Strength (Rc-MPa) obtained from Sclerometry, Apparent Electrical Resistivity (ρ-kΩ/cm) and Corrosion Current Intensity (Ic-µA/cm 2 ) were measured in a column in each of the structures. The results showed that the 10 reinforced concrete structures were found in its residual service life without functioning, confirmed by visual observation. From the behavior of Rc, ρ and Ic values it was possible to confirm that the concrete used did not present the necessary and sufficient quality for the structures to have maintained over time its initial service life conditions of the project, such as aesthetics, functionality and safety in the coastal zone with high construction potential. According to the fit of statistical models based on multiple linear regressions, it was further demonstrated that Rc and Total Chloride Ion Concentration (), including its penetration mechanism from the surface to the concrete interior, were necessary and very influential factors in the adequate durability performance of concrete. It was demonstrated, as a first experience in Ecuador and not much taken into account worldwide, to calculate whenever possible, the coefficient, as another indicator in the evaluation of the quality of concrete, which represents, in addition to the speed with which the could penetrate in the concrete, the relationship between the concrete quality with the natural environment of exposure, the atmosphere. The behavior of Ic values as a function of distance from the coastline increasing allowed the fitting of models based on a decreasing exponential function. Both fitted models can be considered as predictions of the service life of structures that may be located at higher distances from the coastline.

Palabras clave : atmospheric corrosion; structures; reinforced concrete; service life; coastline.

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