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

• Autores: Cristiane Arpino Silva, Jesús Manuel Bernal Camacho
• Localización: Revista de la Construcción, ISSN-e 0718-915X, ISSN 0717-7925, Vol. 18, Nº. 3, 2019, págs. 545-553
• Idioma: inglés
• Enlaces
  • Texto completo (pdf)
• Resumen

  • Nowadays, some studies have shown the increasingchloride 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 microenvironmentsTo 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 timeof 9.5 years and then compared with therealprofiles measured at 9.5 years. The same procedure was used for the profiles measured at 9.5 years,that isto 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 Csvariation. However,profiles of approximately ten years can be used,and their Cs values may increase. Therefore, research of the Cs values must continue to obtainthe correspondingolder chloride profiles toassess the behavior of the curves and the efficiency of the suggested mode