Improvement of Approach Slab Expansion Joints: Performance and Life Cycle Cost Analysis
thesis
posted on 2024-05-01, 00:00authored byMahmoud Al Mahmoud
This project assessed the performance of expansion joints in the Illinois Tollway at the approach slab. It surveyed state Department of Transportation (DOT) practices regarding joint performance and maintenance practices. Four expansion joint types were examined: neoprene joint, pourable joint, preformed joint seal, and strip seal joint. The strip seal joint performed better than the current typical system used by the Illinois Tollway. Challenges identified included debris accumulation and seal separation. A comprehensive Life Cycle Cost Analysis (LCCA) over 50 years indicated that strip seal joints are more cost-effective than the existing system. The recommendations support strip seal joints for new constructions and using Ultra-High-Performance Concrete (UHPC) in joint headers for bridges with lifespans over 50 years.