Protective coating adhesion effect test device and test method under action of uniaxial tension

Abstract

The invention is suitable for the technical field of bridge anti-corrosion engineering coating performance tests, and discloses a protective coating adhesion effect test device under the action of uniaxial tension. The test device comprises test pieces, a fixation system, a loading system and a recording system, and the test device needs to be matched with a large hydraulic servo structure tester for use. The test pieces are composed of a concrete block and steel plates with holes; the fixation system comprises a concrete counter-force foundation and a fixture used for fixing the experimental test pieces; the loading system comprises clamping plates, bolts, a lower connector and an upper connector; the recording system comprises a strain gauge and a pressure sensor. According to the protective coating adhesion effect test device under the action of the uniaxial tension, operation is flexible, and fixation is simple; by means of the method of adjusting the loading system, changing the sizes of the test pieces, changing the loading mode and the like, the tests of the bond value, protective coating damage and the like of the protective coating and the concrete and protective components under the action of axial loading, the action of eccentric loading, the size effect of the test pieces and the action of vibration fatigue are achieved.

Description

technical field [0001] The invention relates to a test device and a test method for the adhesion effect of protective coatings under uniaxial tension, which are suitable for the research on the coating performance of bridge anticorrosion engineering and belong to the technical field of testing. Background technique [0002] The anchorage system of a large bridge (suspension bridge) is an important part of its load-bearing support system, which plays a decisive role in the overall stability of the bridge. The anchoring system is generally made of anchoring steel structure and concrete pouring. When the bridge is built, there is a moment when the load is released. At this time, the steel structure in the anchorage system is subjected to a huge tensile load and deforms. If the steel structure is poured directly with the concrete, due to the strong bonding force between the steel structure and the concrete, the concrete may be cracked and damaged at the moment the load is relea...

AI Technical Summary

Problems solved by technology

Although this method can effectively solve the problem of concrete damage due to load release, the steel structure in the anchorage system is susceptible to corrosion due to the large gap between the steel structure and the concrete and the poor corrosion resistance of the foam-like material. decline, thus affecting the overall stability of the bridge structure and reducing the service life

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