The Analysis Of High Performance Concrete Durability And The Method Of Evaluation

High-performance concrete with high strength, good workability, excellent durability and other technical target for the design goal. At around the world in recent years it has been widely used in a variety of building structures. At the same time, how to improve and assess the permeability of high performance concrete and durability of high performance concrete has become an urgent task for research.In this paper, first of all from the high-performance concrete impermeability, frost resistance, sulphate resistance, and one aggregate base to explore and so on, through high-performance concrete durability testing, analysis of the damage caused by concrete reasons, as well as the impact of durability factor.And the composition of high-performance concrete from the starting material, the analysis of the selection of raw materials for high-performance concrete impact durability. At the same time, the design and construction from the areas of conservation, to further explore the high-performance concrete as a new type of high-quality materials to enhance its durability and the need for effective measures. Finally, the durability of high performance concrete at home and abroad and the status of research in recent years based on the chloride ion penetration of concrete durability, high-performance prediction model, an analysis of anti-chloride ion penetration will be assessed as an integrated high-performance concrete durability viable target and necessity.The results showed that the composition of concrete on the proper selection of materials; through reduce the water-cement ratio, admixtures and mixing mixing fly ash, silica fume can have up to a certain extent, improve the density of cement to improve the pore structure, and enhance the permeability of high performance concrete, frost resistance, can inhibiting alkali-aggregate reaction, improve the durability of concrete.Chloride ion diffusion coefficient and the power can be used to evaluate the permeability of high performance concrete, further evaluation of its durability.