Test method of concrete-filled steel tube test piece with middle corrosion
A technology of concrete filled steel tube and test method, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring device, instrument, etc., can solve problems such as low cost, and achieve the effect of fast corrosion rate and simple production method
Active Publication Date: 2021-10-01
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology
[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a test method for a centrally corroded concrete-filled steel tube specimen, which is used to solve the problem of centrally corroded concrete-filled steel tubes that are simple to operate, low in cost, and meet the needs of multiple components of various sizes at the same time. Test piece problem
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[0027] Attached below Figure 1-4 To further illustrate the present invention.
[0028] Such as Figure 1-4 As shown, a test method for a centrally corroded concrete-filled steel pipe specimen of the present invention includes a test device for a concrete-filled steel pipe specimen, and the test device includes a container 7 and a corrosion solution 9 therein. In this embodiment, the etching solution 9 is a NaCl solution with a concentration of 3.5%. The upper and lower ends of the container 7 are respectively provided with a water inlet 4 and a water outlet 8, so as to periodically replace the corrosion solution. There are two water inlets 4 on the left and right, and an oxygen pump 12 is installed at one of the water inlets 4 to accelerate corrosion. Another water inlet 4 is also connected in turn with an air suction pump 3 and a gas collecting bottle 2 for collecting the gas generated during the corrosion process, and the gas is collected by the downward air discharge me...
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The invention relates to a test method of a concrete-filled steel tube test piece with corrosion, and belongs to the technical field of steel corrosion tests. The method comprises a test device for a concrete-filled steel tube test piece. The test device comprises a container and a corrosion solution in the container, and a water inlet and a water outlet are formed in the upper end and the lower end of the container respectively; an oxygen pump, an aspirator pump and a gas collecting bottle are arranged at the water inlet; rubber and a sealing rubber ring are further arranged at the corrosion position, used for sealing and fixing the concrete-filled steel tube test piece, of the container, and the container can be opened and closed; and a scanning electron microscope is fixedly arranged on the side face of the container, a lens of the scanning electron microscope extends into the container, the scanning electron microscope is connected with a display screen, and a wire is connected between the concrete-filled steel tube test piece and a power source. According to the test method, the test piece is not damaged, the test piece manufacturing quality is high, the corrosion morphology of the test piece can be observed at any time, the method has high universality for the test piece needing middle corrosion, and the test method is suitable for being widely used and good in test effect.
Description
technical field [0001] The invention relates to a test method for a steel pipe concrete specimen corroded in the middle, and belongs to the technical field of steel material corrosion test. Background technique [0002] In recent years, concrete-filled steel tube structures have been widely used in bridges and housing structures. However, due to the deterioration of the natural environment, the surface of concrete-filled steel tubes used in the coast or in the ocean will gradually be corroded. In the actual use process, local corrosion of steel tube concrete The phenomenon of corrosion is far greater than that of the overall uniform corrosion. After local corrosion occurs, the confinement effect provided by the steel pipe on the core concrete is weakened, resulting in the degradation of its mechanical properties, which has brought a large waste of materials and certain economic losses to human beings. Therefore, The research on its local corrosion mechanism and protection te...
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IPC IPC(8): G01N17/00G01N17/02
CPCG01N17/006G01N17/02Y02E30/30
Inventor 熊清清钱佳慧张旺乔文涛苏天成
Owner SHIJIAZHUANG TIEDAO UNIV