This paper, through investigating the diseases condition of the bridge decks, studies the types, reasons and mechanisms of the concrete diseases, and analyzes the water effect for the diseases. In order to prevent degrading of concrete performance and eroding of reinforcing steel bars, the paper presents the different protecting systems for the newly built bridges and the old ones. Based on the situation of eroding of reinforcing steel bar, the paper bring forward the bridge waterproofing course to resolve ...
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