摘要: About two thirds of the 5,500 bridges in the Florida Department of Transportation(FDOT) inventory are exposed to salt water. The resulting corrosion of reinforcement has in the past created serious limitations to the durability of... 展开 About two thirds of the 5,500 bridges in the Florida Department of Transportation(FDOT) inventory are exposed to salt water. The resulting corrosion of reinforcement has in the past created serious limitations to the durability of the substructure of those bridges, resulting in continuing need for costly repairs or early replacement of the structure. The nationwide mandate for 75-year durability construction represents therefore an especially difficult challenge when designing new bridges for these aggressive service marine applications. The present investigation was conducted with the main objective of improving forecasting ability by updating information on the rate of chloride ion penetration, with special attention to the effect of cracks, in the substructure of FDOT marine bridges constructed with the most promising concrete formulations. 收起