Comparison of the Mechanics and Durability of Hybrid Fiber Reinforced Concrete and Frost Resistant Concrete in Bridge Deck Pavement

摘要

The proper mix ratio of hybrid fiber reinforced concrete and frost resistant concrete as bridge deck pavement materials are needed for optimal design. These are based on both the control of strength and durability and consideration of the environment of the construction site. Without reducing its mechanical properties and durability, 0.7% volume ratio of steel fiber and 0.5% volume ratio imitation steel fiber (treated polypropylene fiber) mixed and prepared as C40 hybrid fiber reinforced concrete. The imitation steel fiber can make up for the fact that steel fiber is easily corroded, rather heavy, higher cost, and difficult to use in construction. C40 frost resistant concrete by the admixture of 0.1% volume ratio Dura fiber to improve the freeze-thaw resistance capacity and reduce shrinkage cracks in an early age. The mechanical properties, impermeability, freeze-thaw resistance has improved greatly compared with ordinary concrete. But its mechanical properties and durability can be somewhat less than hybrid fiber reinforced concrete. Frost resistant concrete has an advantage over hybrid fiber reinforced concrete on workability and simple construction. It is recommended superplasticizer can be used to improve the mechanical properties and frost resistance concrete durability.