Bridge Deck Slab Renewal by Using Ultra High-Performance Fiber Reinforced Cementitious Composites

Key Points

• The aim is to develop a method for renewing concrete deck slabs using ultra high-performance fiber reinforced composites (UHPFRC).
• Conducted large-scale construction work on the Okaya Elevated Bridge on the Nagano Expressway without halting highway traffic.
• Implemented specialized machinery to adjust the fluidity of UHPFRC for transport and application.
• Completed the placement of 128 meters (450 m²) of UHPFRC in approximately 8 hours under lane restriction.
• Successfully applied UHPFRC to the deck slab without disrupting highway traffic.
• Demonstrated effective management of construction logistics in a narrow working area.