Steady state chloride diffusivity in mortar containing nano titanium dioxide using response surface methodology

Severe marine conditions and chlorides and sulphates in seawater have led to significant deterioration of maritime structures. Extensive research has identified the leading cause of chloride-induced reinforced mortar (RC) degradation. This study utilizes response surface methods to investigate chloride diffusivity in mortar containing nano titanium dioxide (NT). The research examines independent factors such as time, conductivity, and flux and dependent variables like current, effective diffusivity, and resistivity. The RSM model demonstrates high predictive accuracy for all three parameters, with a 'very good' rating based on the Nash & Sutcliffe model efficiency coefficient. The diffusion of Cl- ions in the anolyte chamber decreases with an increase in NT percentage, indicating a downward trend. The control specimen exhibits the highest diffusion, while the sample with 3% NT shows the least. These mathematical models effectively forecast fundamental mortar properties, aiding builders in making well-informed decisions during the construction process.