Relating Material Properties to Exposure Conditions for Predicting Service Life in Concrete Bridge Decks in Indiana

摘要: Bridges in the United States (US) are deteriorating at an alarming rate. It has been estimated that transportation agencies across US invest more than 5 billion dollars on concrete bridge repair and renovation annually. To meet needs of industry, high performance (HPC) developed for construction bridges. However, to date, link between material properties field is not completely established. Goodspeed et al. [1996} defined using four parameters describe durability mechanical properties. should be noted however alone cannot entirely define performance. Rather some consideration needed quantify conditions which will exposed. The exposure vary based geographical location. This work relates with typical those state Indiana estimate decks. have assessed. Specifically, temperature, rainfall, wetting events, freeze thaw cycles, relative humidity classified. assess variation these state, contour maps were information from cities as well surrounding states. eight suggested by [1996] reviewed. Three key distresses behavior (chloride ingress, freezing thawing, shrinkage cracking) investigated depth. Relationships relate measured (from results AASHTO/ASTM tests) predicted structure under different condition. First, a model presented Rapid Chloride Permeability Test (RCPT) anticipated service life deck against corrosion due chloride ingress. Second, sorptivity, porosity, critical saturation exposed thawing. Third, potential premature cracking. each models Indiana.