A Novel Composite Deck Repair Layer for Concrete Beam Bridges

Abstract

The invention relates to bridge deck repairing, in particular to a novel compound deck repairing layer for a concrete beam bridge. The deck repairing layer comprises a carbon fiber plate reinforcement layer, an epoxy mortar layer and a stone mastic asphalt formation layer, wherein the carbon fiber plate reinforcement layer is formed by pressing high-strength carbon fiber and epoxy resin at high temperature; the epoxy mortar layer is formed by mixing epoxy resin and fine sand; the stone mastic asphalt formation layer is a stone mastic asphalt concrete layer. The novel compound deck repairing layer, provided by the invention, is clear in structural function; the repairing layer can effectively prevent further expansion of a crack; the formation layer has excellent water preventing and thermal insulation functions to avoid wearing and corrosion to the steel reinforcement inside the concrete bridge; the adopted carbon fiber and other materials can improve tensile strength of the repairing layer, and the service life of the deck is prolonged.

Description

technical field [0001] The invention relates to bridge deck repair, in particular to a novel composite bridge deck repair layer for concrete girder bridges. Background technique [0002] After several years of operation, concrete bridges will crack due to traffic load, temperature change, humidity and heat cycle and many external factors, which bring potential hazards to bridges, especially prestressed concrete bridges. Most of these cracks appear on the bottom surface of the box girder roof and the bottom surface of the bridge bottom plate. In the later stage of remediation, methods such as pasting steel plates, carbon fiber plates or applying prestress are usually used for reinforcement and maintenance. [0003] However, after some concrete bridges have longitudinal cracks, the internal steel bars corrode, which seriously affects the structural safety of the bridge. Moreover, due to the particularity of the structural design of such bridges, pasting steel slats and adding ...

AI Technical Summary

Problems solved by technology

[0003] However, after some concrete bridges have longitudinal cracks, the internal steel bars corrode, which seriously affects the structural safety of the bridge. Moreover, due to the particularity of the structural design of this type of bridge, pasting steel slats and adding reinforced concrete layers will increase the bridge's own weight. It may aggravate the cracks on the bridge deck and cause more damage to the bridge deck. In order to avoid these problems, it is necessary to lay a wear layer on the top of the box girder, which not only affects the construction period but also increases the cost

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