Application of High-Performance Concrete in Bridge Structures Under Extreme Environment

Abstract

Bridges in extreme environments combine the mission of connecting remote areas with the challenge of surviving in harsh environments. For the high quality construction and long term application of bridges, the design and application of high-performance concrete (HPC) are researched in this paper. Firstly, the application of HPC in bridges under cold environment is studied. Based on the failure mechanism of concrete and mix ratio design of HPC in cold area, the conclusion is drawn that adding appropriate amount of diatomaceous earth materials can better adapt to cold environment. Then, what kind of HPC is suitable for bridge in coastal environment is explored. By studying the failure mechanism and mix ratio of concrete in coastal areas, it is found that adding the appropriate amount of blast-furnace slag (GGBS) can better resist the damage caused by the ocean. Finally, the working condition of HPC is defined as the construction of bridges in hot environment. The HPC was designed after consulting the difficulties of concrete pouring in hot weather. The experimental results show that adding a proper amount of fly ash can solve this problem. This study can provide a reference for using HPC to build bridges in different extreme environments.