LAUSR

In the present investigation, the effect of ceramic waste dust (CWD) as a partial replacement of Portland cement (PC) on the corrosion behavior of ASTM A615 steel rebarwere evaluated byelectrochemical impedance spectroscopy (EIS), open circuit potential (OCP) andwater absorption tests after exposure to the marine environment. All samples with CWDs show a decrease in water absorption with increasing exposure time compared to the PC concrete. The samples with 15% CWD revealed the highest compressive strength during theentire exposure time in3.5 wt% NaCl solution. The OCP value of the reinforced concrete samples with 15 wt% CWDs stayedin the low or uncertain corrosion area for much longer. The surface morphologies of carbon steel rebarsindicatedthat the amount of pitting corrosion on the steel bar embedded in 15 wt% CWD concrete sample was significantly lower than that of the others. The electrochemical results showedthat the higher content of CWDs up to 15 wt% in PC has significantly improved the concrete structure as well as reduced corrosion rate.