Study of chloride penetration profiles and surface chloride content of concrete structures exposed to marine environment evaluated at different exposure times

Authors

  • Cristiane Silva  Universidad Federal de Rio Grande (Brazil)
  • Bernal Camacho Jesus Universidad Autónoma de Sinaloa (Mexico)
  • Júlio Bandeira Universidad Federal de Rio Grande (Brazil)
  • André Guimarães Universidad Federal de Rio Grande (Brazil)
  • Ramón Corral Higuera Universidad Autónoma de Sinaloa (Mexico)

DOI:

https://doi.org/10.7764/RDLC.18.3.545

Keywords:

durability, marine environment, chlorides, concrete, diffusion

Abstract

Nowadays, some studies have shown the increasing chloride content of concrete surface (Cs) exposed to marine environments over time. To evaluate this behavior, a comparative analysis was conducted between the chloride profiles in tetrapods located in southern Brazil, obtained from samples extracted at 5 and 9.5 years from four microenvironments To this end, the equation of Fick's second lawconsiders the time-dependent Cs variation, a model was prepared for each exposure time profile measured from each microenvironment, which considered the Cs variation since it increased significantly from 5 to 9.5 years. The models obtained from the profiles measured at 5 years were used to estimate the profile at the exposure time of 9.5 years and then compared with the real profiles measured at 9.5 years. The same procedure was used for the profiles measured at 9.5 years, that is to say, a 5-year profile was estimated and compared with a profile measured at the same exposure time. This shows the efficiency of the model. According to the research results, profiles of about 5 years are still too premature to be used as an estimate of the residual useful life of a structure, even considering the Cs variation. However, profiles of approximately ten years can be used, and their Cs values may increase. Therefore, research of the Cs values must continue to obtain the corresponding older chloride profiles to assess the behavior of the curves and the efficiency of the suggested model.

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Author Biographies

Cristiane Silva , Universidad Federal de Rio Grande (Brazil)

Universidad Federal de Rio Grande, Departamento de Ingenieiría Civil
Rio Grande, 96500 (Brazil)
crisarpino@ibest.com.br

Bernal Camacho Jesus, Universidad Autónoma de Sinaloa (Mexico)

Universidad Autónoma de Sinaloa, Escuela de Ingeniería Mazatlán
Sinaloa, 82017 (Mexico)
jmbernalc@uas.edu.mx

Júlio Bandeira, Universidad Federal de Rio Grande (Brazil)

Universidad Federal de Rio Grande, Departamento de Ingeniería Civil

Rio Grande 96500 (Brazil)
jorge-band@hotmail.com

André Guimarães, Universidad Federal de Rio Grande (Brazil)

Universidad Federal de Rio Grande, Departamento de Ingenieiría Civil
Rio Grande, 96500 (Brazil)
atcg@vetorial.net

Ramón Corral Higuera, Universidad Autónoma de Sinaloa (Mexico)

Universidad Autónoma de Sinaloa, Facultad de Ingenieria Mochis
Sinaloa, 81223 (Mexico)
ramon.corral@uas.edu.mx

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Published

2019-12-31

How to Cite

Silva , C., Camacho Jesus, B., Bandeira, J., Guimarães, A., & Corral Higuera, R. (2019). Study of chloride penetration profiles and surface chloride content of concrete structures exposed to marine environment evaluated at different exposure times. Revista De La Construcción. Journal of Construction, 18(3), 545–553. https://doi.org/10.7764/RDLC.18.3.545