Marine structure model segmented pressurizing type constant temperature salt fog accelerated erosion test system

Abstract

The invention discloses a marine structure model segmented pressurizing type constant temperature salt fog accelerated erosion test system. The system comprises a segmented sealed pressure test box (1), wherein each segment of the segmented sealed pressure test box (1) is provided with a salt fog spray module (2), a pressurizing module (3) and a constant temperature module (4); sliding rails (15) are symmetrically and vertically arranged on inner side walls of the segmented sealed pressure test box (1); multiple layering platforms (16) are arranged in the sliding rails (15); tensioned spring wires (17) are arranged in the layering platforms (16); and a test piece (18) penetrates through the spring wires (17) and then is arranged at the bottom of the segmented sealed pressure test box (1). According to the marine structure model segmented pressurizing type constant temperature salt fog accelerated erosion test system provided by the invention, test pieces meeting saline ion erosion conditions of prototype structures in different periods can be effectively prepared, so that the test pieces adopted in durability research of the marine structure meets the actual situations.

Description

Technical field [0001] The present invention involves a segmented temperature salt fog acceleration erosion test system in segments, which involves a specific concentration of heating and compressing salt fog to accelerate the simulation of the current sea industry structure.The system of the distribution status of chloride ion ions inside the object is suitable for experimental research on the current chloride ion ion distribution of various simulated sea industrial structures. Background technique [0002] The vast majority of sea industry structures are in the working environment of three different working mediums in the atmospheric area -tide -mortar area -the underwater area. Due to the temperature changes, tidal changes, meteorological conditions, and local seawater salinity changes in the project.The concentration of chloride ion ions in the environment will produce a large difference in various working mediums. With the effect of different concentrations of the working me...

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Problems solved by technology

[0005] (1) When adding chloride salts and sulfates in the stage of pouring model specimens, because the concrete has not yet set at this time, the added salts are in the form of ions in the concrete mixture along the direction of the concentration gradient. Speed ​​diffusion will inevitably lead to a uniform ion concentration distribution in the entire specimen, and this diffusion will continue for a long time after the initial setting of the concrete, which will lead to the pre-designed section along the structure It is difficult to control the different ion concentrations, which makes the erosion state of the model very different from the erosion state of the prototype

This would lead to experimental studies based on an inaccurate base model

[0006] (2) The actual chloride ion\sulfate ion erosion prototype marine structure is eroded from the external environment to the inside under the dynamic action of concentration difference, while the above-mentioned commonly used laboratories add chloride salt\sulfuric acid to the concrete mixture The practice of salt is actually a method in which ions are evenly distributed inside the structure, which will lead to significant differences in the ion migration dynamic environment between the model and the prototype, making the ion erosion state of the model deviate from the actual ion erosion state of the prototype

[0007] In addition, the more popular salt spray test chambers can only conduct erosion experiments with a single concentration of salt spray on the specimen, which is very different from the layered and variable concentration chloride ion\sulfate ion working environment in which the aforementioned offshore structures are located. This greatly limits the application of the existing salt spray test chamber in the field of ion erosion research of marine structures

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