INVESTIGATION OF THE RAPID CHLORIDE PERMEABILITY TEST

摘要: High-quality impermeable concrete as cover of reinforcing steel is one the best methods preventing chlorides from initiating corrosion. American Association State Highway and Transportation Officials (AASHTO) T 277 Society for Testing Materials (ASTM) C 1202-91 Rapid Chloride Permeability Test were developed because a need to rapidly measure permeability chloride ions. Some criticisms have been made, mainly concerning fact that conditions under which measurements are made may cause changes specimens. This work was designed observe how in testing procedure affect results. Factors such temperature, AC impedance, initial DC current, charge passed, ion profiles monitored during polarization four different concretes. It found simple measurement current or resistivity gave same ranking conventional tests concretes can replace rapid test with considerable time saving.