Light-weight cementitious conductive anode for impressed current cathodic protection of steel reinforced concrete application

This paper presents the results of a study of the effectiveness of lightweight conductive cementitiousmortar as an anode material for impressed current cathodic protection of concrete structures. The anodeis made up of pumice aggregate (fine), carbon fibres and cement with MMO-Ti as a primary anode. Acceleratedgalvanic test, conductivity measurement, dry density and compressive strength were carried outand compared with the cement mortar without fibres. Results have shown that the mortar at 20–30 persenreplacement level of pumice aggregate with 1.1 persen carbon fibre content is a percolation threshold at whichhighest conductivity of 0.2 S/cm is achieved. The weight of the anode was found to have reduced to half ofthe weight of the conventional anodes. Polarisation and impedance studies confirmed the possible use ofthis material as an anode in cathodic protection of reinforced concrete structures. Construction and Building Materials 71 (2014) 167–180