关键词：桥面;钢筋混凝土;开裂;腐蚀
摘 要：One serious problem reinforced concrete bridge decks face throughout the United States is the development of several cracks. Concrete bridge decks of all ages and sizes, some even constructed within the last several years, show different levels of cracking. Regardless of the type of superstructure, the number and length of spans, and the type of concrete used, cracks inevitably develop in every reinforced concrete bridge deck. There is a need to study the extent of cracking developed in concrete bridge decks so that the causes of cracking can be identified and counter measures established to minimize cracking in future bridge deck constructions. Cracks are critical on bridge decks because cracks provide access to harmful, corrosive chemicals that deteriorate the reinforcing steel, which is embedded within the concrete. Once chloride and other deteriorating agents penetrate concrete and make contact with the reinforcing steel, the deteriorating agents will corrode the steel, cause spalling, and eventually cause a loss of cross sectional area for the reinforcing steel. Such deterioration can affect the shear and moment capacity of reinforced concrete bridge decks. Also, the bridge deck cracks allow water and deicing salts to leak down through the bridge deck and damage the substructure and affect the aesthetics of the bridge.