Bridges, Tunnels and other Transportation Structures
Full Session with Abstracts
Many owners are asking about durability of bridges and details used when bridges are constructed using Accelerated Bridge Construction (ABC). Research efforts at Accelerated Bridge Construction University Transportation Center (ABC-UTC) at FIU has developed technologies that allows construction of bridges using ABC philosophy, while significantly enhancing their service life and reducing the maintenance costs. In this new technology, the outside profile of the bridge elements are constructed using thin layers of Ultra High Performance Concrete (UHPC), called UHPC shell formwork. These UHPC shells are constructed in the plant and brought to job site, stacked on top of each other, if needed, steel cage is placed inside and then filled with regular or even lightweight concrete. The technology is termed "ABC Made Conventional". The advantages of “ABC Made conventional” include: a) Eliminating the need for formwork, b) Eliminating the need for removal of formwork, c) UHPC protects the concrete inside- Maintenance free, d) Light weight concrete could be used to fill the cavity, e) Use of light weight concrete reduces foundation sizes, f) It increases the member capacity using same dimension, g) Allows using smaller cross section, h) Reinforcement could be incorporated into the shell, reducing field operations and i) Uses conventional methods of construction. This presentation will provide overview of the research studies and results to date for materializing the concept of “ABC Made Conventional” technologies, with a focus on durability and service life aspects.