Research On Improving Structural Durability Of Highway Concrete

The durability of concrete is mainly refers to its resistance to physical and chemical erosion, such as freezing and thawing, high temperature, carbonization, and sulfate attack ability.This ability mainly depends on the concrete resistance to corrosive medium in invasive capacity; also depends on in hardened cement paste by capillary porosity, and air content of concrete, durability, porosity, volume stability and resistance to chemical attack ability of material itself.The factors influencing the durability of concrete including the concrete physical, chemical properties, composition of concrete raw material properties, construction method and construction quality as well as the destructive effect on the properties of.Shandong province is a big province with highway, bridge, concrete structure from numerous, the top structure of the bridge to the lower foundation engineering and pavement engineering, extensive use of concrete material as the main structural material.These concrete structure construction and the service life is endless and same, construction quality and design standards also vary greatly, there are some concrete structure has been concrete aging phenomenon, serious already could not satisfy the normal service of highway need, want every year to invest a lot of manpower and material resources to repair.In order to improve the service life of concrete structure and operation performance, in Shandong province the representative problems of durability of concrete were studied.Through the study of this subject, is systematically summarized the impact of highway concrete structure durability influence factors, and put forward to improve the durability of concrete structure measures and Countermeasures for maintenance of highway; in the durability of concrete structure detection method by field investigation, detection and indoor experiment as the foundation, summarizes the concrete durability testing main index, convenient for the durability of concrete for effective assessment, in order to improve the service life of concrete structure and operation performance provides theoretical basis.