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Research on the Anticorrosion Coating Under the Paved Layer for Highway Steel Box Bridge Deck

Journal of China University of Mining and Technology 2006年第4期16卷 429-432页

作者： SHEN Cheng-jin MING Tu-zhang HU Guang-wei OU Xue-mei GEN Ou School of Material Science ＆ Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Jiangsu Provincial Communication Planning and Design Institute Nanjing Jiangsu 210005 China

The corrosion of the anticorrosion coating and the defects of the asphalt concrete paved layer have been investigated on long-span steel box bridge decks. The anticorrosion coating lies in the midclle of two entirely different materials： a highway steel box bridge deck and a paved layer, which is used as anticorrosion and waterproof coating for the steel bridge deck. For our study, electrochemical corrosion and pull strength experiments have been selected for the investigation of the corrosion properties of inorganic zinc rich coating, epoxy zinc rich coating and arc sprayed zinc coating. The adhesive strength between the coatings and the panel, and the effect of the coating corrosion on the shear properties of the paved layers including cast asphalt, thermal asphalt mortar, epoxy asphalt and modified asphalt con- crete have been investigated. The results show that the adhesive strength between the coatings and the bridge panel is controlled by the method of pre-processing rust removal. Coating by sandblasting has stronger adhesive strength than coating by shot peening. The results also reveal that shear strength of the paved layer is affected by the corrosion product of zinc coating. The arc sprayed zinc coating has stronger shear strength than zinc rich coatings.

关键词： steel bridge deck zinc coatings asphalt concrete paved layer

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