Test device and method for corrosion degradation of concrete panels under complex actions

Abstract

The invention discloses a testing device and method of corrosion deterioration for concrete panels under complex action; the device applies constant compressive tensile stress to a panel sample through forward and reverse pre-tensioning forces, applies high hydraulic pressure and high hydraulic gradient action through a sealed high-pressure corrosive solution, and provides friction that the panel bears through a cushion friction device. The device includes a sealed box, an isolation chamber and a corrosion chamber, the sealed high-pressure corrosive solution is sealed in the sealed box, the isolation chamber is used for protecting sensors, loading shafts and the like from solution erosion and acting as a counterforce device to apply tensile stress, and the corrosion chamber defines an osmosis passage. A rolling shaft support enables all horizontal compression of a loading rod to be balanced via friction between a cushion block and the panel sample, and pre-tensioning force, friction and solution pressure are kept stable in long time by means of secondary tightening and solution supplementing. One or more of sulfate, chloride and other osmotic corrosion environments may be provided in the sealed box.

Description

technical field [0001] The invention belongs to the technical field of simulation tests, and in particular relates to a test device for corrosion and deterioration of concrete panels under complex actions and a method thereof. [0002] The invention relates to a method and device for testing the dissolution and degradation of concrete panels under complex effects, in particular to a method for simulating the complex stress state of concrete panels, which can withstand the action of cushion friction and seepage and dissolution of aggressive solutions such as sulfate and chloride salts under high hydraulic gradients. Functional test apparatus and methods. Background technique [0003] Hydraulic concrete is a porous medium material, and its stress state is closely related to its pore ratio. When the compressive stress is small, the pores inside the concrete close, and when the compressive stress is high, the pores open. When subjected to tension, the internal pores will open ...

AI Technical Summary

Problems solved by technology

In addition, conventional three-way tension and compression loads are loaded hydraulically by jacks, but they cannot provide long-term stable loads, and the device cost is high

Counterweight and spring loading cannot achieve desired high stress levels and the unit is bulky and inconvenient

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