Applied Research Of High Performance Concrete In Highway Bridges

The preparation of High Performance Concrete (HPC) and its applications in highway standard simple plate beams are studied in Mis paper.To promote the theoretic researches on HPC mixture ratio and its actual application in highway bridges, the physical and mechanical character of HPC. application in and beyond the county. design theory of mixture ratio are introduced in detail. On this basis, the ordinary material is ac opted and high effective water reducing agent. pumping over agent and inorganic mineral admixture etc are added. After mixture test and test optimization, high performance concrete is produced, whose compression strength of 28 days can reach C70, and main physical and mechanical performances such as strengths elastic ratio. Poisson's ratio are tested and studied.Based on experiment test, the C80HPC is used to replace the ordinary concrete in highway standard simple plate beam. With the utilization of design theory for prestressed concrete structure and based on design standard concerning bridge structure such as Specifications for Design of Reinforced Concrete and Prestressed Concrete Highway Bridges and Culverts suggestion require edition and Technical Direction Rules for High Strength Concrete StructuresCECS 104:99, the ordinary concrete plate is optimization designed and comparison analysis with original standard plate is taken, which produce the quantitative variation between designed plate and original plate in such aspects as dead bad of plate . height of plate and quantity of prestressing reinforcement.At the end of the paper, other bridge's performances such as the durability of HPC and economy is analyzed and discussed.