Mix Design and Performance Study of Marine Concrete for Precast Box Girders for Jintang Bridge

Tests were carried out in accordance with the characteristics of the environment where the marine concrete for the precast box girders is used for Jintang Bridge,in which the technology of mixing of fly ash with mineral powder and controlling the water content in concrete was used to produce C50 marine concrete for the precast box girders.The test results showed that the workability and mechanical property of the C50 marine concrete for box girders were good and the addition of mineral admixture of a certain amount may increase the durability of marine concrete,such as cracking resistance,volumetric stability,and resistance against carbonization and chloride ion infiltration.