Deterioration Mechanism and Repair Methods for Concrete Decks in Bridges

초록

It is imperative to propose effective maintenance strategies for deteriorated bridge concrete deck, given the increasing cases of maintenance failures. This study aims to elucidate the deterioration mechanism and patterns of bridge concrete deck degradation. Additionally, it presents various repair methods and flowcharts for determining the most suitable repair method for each type of deterioration. The deterioration mechanisms include initial defects, cracks, heavy vehicle loads, and the infiltration of water and deicing chemicals through cracks. These factors lead to the expansion and deepening of deterioration, exacerbated by freeze-thaw cycles and heavy vehicles. Repair methods are categorized into concrete overlay repair (Type A), partial-depth deck repair (Type B), and full-depth deck repair (Type C). The study also proposes flowcharts for determining the appropriate repair method based on results obtained from visual and in-depth inspections of deteriorated concrete decks. By following this structured approach, the maintenance and rehabilitation of bridge decks can be conducted more efficiently, reducing long-term costs and enhancing the resilience of bridge infrastructure. © 2024, Korea Concrete Institute. All rights reserved.

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