CORROSION PROTECTION OF REINFORCING STEEL USING PYRAMENT BLENDED CEMENT CONCRETE

Pyrament cement is a high performance Type IP blended hydraulic cement that meet the requirements of ASTM C-595. The cement has been modified with propietary interground functional additions that meet the requirements of ASTM C-688. Concrete made of Pyrament cement exhibits high early strength, resistance to freeze/thaw conditions and deicer scaling without the aid of air entraining admixtures. Durability testing was performed to evaluate the resistance of concrete made with Pyrament blended cement and Florida limestone aggregate to chloride- ion penetration and subsequent corrosion of the steel reinforcement. Both Rapid Chloride Ion Permeability testing (AASHTO T277) and Florida Time- To-Corrosion tests were carried out. The results clearly indicate that concrete made with Pyrament blended cement has unusually high resistance to chloride-ion permeability and time-to-corrosion. Concrete made with Pyrament blended cement and recycled concrete as aggregate also exhibit this high resistance to chloride-ion penetration and time-to-corrosion. (A) For the covering abstract of the conference see IRRD 853281.