Cailiao Baohu (Sep 2023)
Study on Preparation and Protective Properties of Epoxy Adhesive for Bridge Splicing
Abstract
In view of the harsh marine atmospheric corrosion environment and the long-life design requirement of reinforced concrete bridges，the requirements for the comprehensive performance of bridge splicing adhesives are constantly increasing.In this research， an epoxy adhesive for offshore bridge splicing was developed， and the effects of different curing agents and pigment to binder ratios(P/B) on the properties of the epoxy adhesive were investigated.The anti-corrosive performance of the epoxy adhesive was evaluated through electrochemical workstation， salt water resistance performance， and neutral salt spray acceleration test.Results showed that the tensile strength and compressive strength of the prepared epoxy adhesive were 22.1 MPa and 92.7 MPa， respectively.After testing with neutral salt spray for 2 000 h and salt water immersion for 2 000 h， the paint film was complete， without corrosion or peeling.The electrochemical corrosion rate of epoxy adhesive with a thickness of 100 μm in 3.5%NaCl was about 1/1 000 of that of pure carbon steel， indicating that the developed epoxy adhesive had good corrosion protection function.
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