This research reviewed the current and future uses of Ultra-High Performance Concrete (UHPC) for bridge applications in the state of Ohio. Since most designers, owners and contractors are unfamiliar with the material and only a small percentage of all bridges utilize it, UHPC is still considered a relatively new material. Monitoring and understanding its performance in current applications will undoubtedly provide useful insights for future applications. Advantages of UHPC discussed include rapid strength gain that can be utilized in Accelerate Bridge Construction, fiber content which provides post cracking strength, high bond strength which shortens development lengths of reinforcement, and the flowable material which allows UHPC to better penetrate tighter spaces. Disadvantages of UHPC such as material cost, increased labor and time are also discussed. In addition, recommendations for future UHPC applications are provided that would benefit designers, owners and contractors through valuable insight that was gained during these research objectives. The first objective was to review the performance of UHPC in the Sollars Road adjacent prestressed concrete box beam bridge in Fayette County. The design of the UHPC longitudinal joint (shear keys) included dowel bars but eliminated intermediate diaphragms, transverse post-tensioning, and a composite deck. Comparing truck loading data from 2014 shortly after bridge construction was completed and 2017 during this study, the load distribution has improved to some extent and the bridge is responding to loading in a similar manner which implies minimal to no cracking of the UHPC shear keys. This simplified design may be a realistic alternative to solve the typical issue of cracking in the longitudinal joints (shear keys) and associated reflective cracking in composite decks for adjacent prestressed concrete box beam bridges. This improved behavior with UHPC joints may result in longer service life performance of these popular bridge designs. The research also monitored and evaluated the 2017 UHPC closure placement for the Hazelton-Etna road bridge over I-70, since this was a new application of UHPC for Ohio and the United States at the time. Data was collected during placement and during different seasonal periods to monitor daily and seasonal thermal effects. Comparing the data collected from 2017 to 2018 (approximately one year after the UHPC placement), the UHPC is responding in a similar manner which implies no cracking occurred. The final objective of the research was to provide review and advisement to ODOT related to the GAL 160-18.84 UHPC deck panel connections. However, the Department ultimately directed the contractor to construct a traditional cast-in-place deck for reasons unrelated to UHPC. The proposed end panels had a unique connection to deal with a large skew of the bridge alignment. At the time, the project would have been the largest placement of UHPC material in Ohio.

This research reviewed the current and future uses of UHPC in the state of Ohio for bridge related structures. The first objective was to review the performance of UHPC in the Sollars Road adjacent prestressed concrete box beam bridge in Licking County constructed in 2014. UHPC was utilized in the shear keys between the box beams and included dowel bars. Data acquired during 2017 from truck loading and thermal changes was nearly identical to that obtained in 2014 shortly after bridge construction was completed. This implied the bridge's UHPC longitudinal joints are performing very well three years after construction. The research also monitored and evaluated the 2017 UHPC closure pour for the LIC 310-0096 bridge since this was a new usage of UHPC. Data was collected during placement and during different seasonal periods to monitor daily and seasonal thermal effects. Strains from temperature changes showed strains in the range of 150 to -400 microstrain. Minor hairline cracking was observed in the UHPC and adjacent conventional concrete deck. The final objective of the research was to provide review and advisement to ODOT related to the GAL 160-18.84 UHPC deck panel connections. The deck panels were to be full width except near the bridge ends due to the high 35o skew. However, the Department ultimately directed to construct a traditional cast-in-place deck for reasons unrelated to UHPC.

Innovative Bridge Structures Based on Ultra-High Performance Concrete (UHPC): Theory, Experiments and Applications introduces more than a dozen innovative bridge structures and engineering applications developed by the author's team based on UHPC. As the new bridge structure developed by UHPC can make outstanding contributions to the realization of the "carbon peaking and carbon neutrality goals" and "sustainable development," and since recent studies have shown that the application of UHPC is expected to greatly reduce the amount of materials and carbon emissions and prolong the life of the structure, this book is an ideal update on the topic. For example, after calculation, when UHPC is applied to the arch bridge with compression as the main stress characteristic, compared with the steel arch bridge, the dead weight of the UHPC arch bridge is basically the same, and the cost and carbon emission are only 34% and 20% of the latter. Ultra-high performance concrete (UHPC) as a new generation of civil structural materials has the characteristics of high strength, high toughness and high durability. Through the collaborative innovation of new materials and new structures, the application of UHPC in bridge engineering is expected to achieve the goal of economical, environmentally-friendly, durable and high performance of the main structure. Teachers readers about the new structures and technologies in bridge engineering developed by the author's team based on UHPC Provides relevant experimental studies and the mechanical properties of different UHPC structures Helps users understand the design method and calculation theory of UHPC bridge structures Covers the characteristics and advantages of new UHPC structures and technologies applied to engineering

Ultra-high performance concrete (UHPC) is an advanced construction material that affords new opportunities for the future of the highway infrastructure. The Federal Highway Administration has been engaged in research on the optimal uses of UHPC in the highway bridge infrastructure since 2001 through its Bridge of the Future initiative. This report presents the state of the art in UHPC with regard to uses in the highway transportation infrastructure. Compiled from hundreds of references representing research, development, and deployment efforts around the world, this report provides a framework for gaining a deeper understanding of UHPC as well as a platform from which to increase the use of this class of advanced cementitious composite materials. This report will assist stakeholders, including State transportation departments, researchers, and design consultants, to grasp the capabilities of UHPC and thus use the material to address pressing needs in the highway transportation infrastructure.