Durability Performance Criteria for Precast RC Box Units and Repair Measures Based on Nondestructive Testing and Evaluation

This paper presents the durability performance criteria for precast reinforced concrete (RC) box units for long-term durability against corrosion deterioration. This paper also presents the condition evaluation of precast RC box units constructed (at site) for road under bridge (RUB) that were exposed to open atmosphere for a period of about seven to eight years. This warranted the evaluation of the quality, integrity, strength, and durability...