Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes

Corrosion is one of the main issues affecting service life reinforced concrete structures. The Open Circuit Potential (OCP) technique a non-destructive method used to survey and monitor this problem. This test can also be in laboratory environment provide valuable information supporting selection process supplementary materials for durable concretes. Although qualitative commonly used, there still lack consensus on suitability specific procedures experimental analysis, such as type reference electrode influence accelerated aging (adoption wetting/drying cycles level immersion specimens). Therefore, present study aims evaluate prediction early steel corrosion activity OCP tests. paper focused testing eco-efficient cementitious composites containing industrial wastes, sugarcane bagasse ash sand (SBAS) water treatment plant sludge (WTPS), replacement natural sand. results showed that an adoption combined cycles, together with partial (rather than total) specimens NaCl solution, leads earlier appearance corrosion. allows shorten period by almost 10 weeks. It due higher access oxygen concentration free chlorides from saline solution accumulated porous system. lesser importance. Moreover, incorporation 30% SBAS 3% WTPS protection corrosion, confirming wide applicability any matrices or without wastes.