Interfacial adhesive for steel bridge surface paving

Abstract

The steel bridge surface paving interface adhesive is for adhering spread layer to the steel bridge surface. The adhesive includes component an and component B in the ratio of 10 to 3-4. the component A consists of bisphenols A type epoxy resin CYD-128 in 90 wt% and phenol-phenolic epoxy resin-5 in 10 wt%; and the component B consists of polyamide-650 in 50 wt%, polysulfide rubber in 18 wt%, amine curing agent T31 in 30 wt% and coupling agent KH-550 in 2 wt%. The adhesive of the present invention has excellent tension resisting performance, excellent shear resisting performance, high heat resistance, high ageing resistance, and easy curing.

Description

Technical field: [0001] The invention relates to an adhesive for a bridge pavement and a pavement layer, in particular to an adhesive for a steel bridge pavement interface. Background technique: [0002] At present, except for a few domestic steel bridge deck pavements that have been opened to traffic in good condition, most of the steel bridge deck pavements have pavement defects shortly after they are completed and opened to traffic, the most typical of which is large-scale cracking of the pavement , Own bag. After analysis, it is determined that the main external causes of this type of disease are the shear stress generated by the horizontal inertial force of the vehicle, the temperature difference between the pavement and the steel bridge deck system, and the shear stress generated by the longitudinal relative displacement caused by the difference in thermal expansion coefficient, and the shear stress of the steel bridge. The shear stress generated on the joint surface ...

AI Technical Summary

Problems solved by technology

[0003] In terms of enhancing the interface shear strength, some researches have been carried out in China, and a variety of interface bonding materials have been used, such as the use of SBS modified asphalt with a high softening point, the addition of construction asphalt and rubber modified asphalt (Beijing Dabeiyao Overpass Bridge ), using modified emulsified asphalt (the original pavement plan of Xiling Yangtze River Bridge), etc., but the effect is not great, because the adhesion of this type of waterproof bonding material to the steel plate is closely related to the temperature condition of the steel plate. Increased its adhesion ability also decreased significantly