A device and method for electrically accelerated concrete dissolution test under high hydraulic gradient

Abstract

The invention discloses a device and a method for testing the corrosion of electrically accelerated concrete under a high hydraulic gradient. The device comprises a test chamber, an external pressuremachine, an external power supply and test electrodes, wherein the test chamber is internally provided with at least one pressure test cabinet, a test piece fixing groove is formed in the middle partof the pressure test cabinet, and a concrete test piece is used for partitioning the pressure test cabinet into a positive electrode test area and a negative electrode test area; the test electrodes comprise a test positive electrode and a test negative electrode, the test positive electrode is arranged inside the positive electrode test area, the test negative electrode is arranged inside the negative electrode test area, and each of the positive electrode test area and the negative electrode test area is filled with a conductive corrosion solution; the external pressure machine is connectedwith a pressure pipeline, and the other end of the pressure pipe stretches into the conductive corrosion solution in the positive electrode test area; and drainage sampling pipes are arranged at the bottom of the positive electrode test area and the bottom of the negative electrode test area respectively. The influence of permeating corrosion for concrete performance can be tested under long-termconstant high hydraulic gradient effect, related test data can be measured, and concrete corrosion test research is carried out.

Description

technical field

[0001] The invention relates to the field of simulation tests, in particular to an electrically accelerated concrete corrosion test device and method under high hydraulic gradient. Background technique

[0002] The hydraulic concrete structure is in contact with environmental water for a long time, which is prone to corrosion, and the internal solid-phase calcium dissolves and precipitates under the action of convection and diffusion, resulting in structural deterioration, lower bearing capacity, and endangering engineering safety. Dam structures such as concrete panels, anti-seepage curtains, and deep tunnels operate under high hydraulic gradients for a long time. The ion precipitation effect of seepage water flow is much greater than the diffusion effect caused by concentration differences. The deterioration speed is compared with the contact between gate piers and bridge piers. Erosion is faster. At present, a number of high dam projects built at home and...

Examples

Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0041] Such as figure 1 As shown, an electrically accelerated concrete corrosion test device under a high hydraulic gradient includes a test chamber, an external press 11, an external power source 2 and test electrodes.

[0042] At least one pressure test chamber is arranged in the test chamber, preferably 3 pressure test chambers, and the number of pressure test chambers is specifically set according to usage requirements. The 3 pressure test chambers are parallel to each other, such as image 3 As shown, they are pressure test room 1 28, pressure test room 2 29 and pressure test room 3 30 respectively. The 3 pressure test rooms can carry out 3 groups of tests at the same time, carry out controlled variable tests, and study under different pressures and different water temperatures, The corrosion of concrete specimens under...

technical field

[0001] The invention relates to the field of simulation tests, in particular to an electrically accelerated concrete corrosion test device and method under high hydraulic gradient. Background technique

[0002] The hydraulic concrete structure is in contact with environmental water for a long time, which is prone to corrosion, and the internal solid-phase calcium dissolves and precipitates under the action of convection and diffusion, resulting in structural deterioration, lower bearing capacity, and endangering engineering safety. Dam structures such as concrete panels, anti-seepage curtains, and deep tunnels operate under high hydraulic gradients for a long time. The ion precipitation effect of seepage water flow is much greater than the diffusion effect caused by concentration differences. The deterioration speed is compared with the contact between gate piers and bridge piers. Erosion is faster. At present, a number of high dam projects built at home and...

Examples

Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0041] Such as figure 1 As shown, an electrically accelerated concrete corrosion test device under a high hydraulic gradient includes a test chamber, an external press 11, an external power source 2 and test electrodes.

[0042] At least one pressure test chamber is arranged in the test chamber, preferably 3 pressure test chambers, and the number of pressure test chambers is specifically set according to usage requirements. The 3 pressure test chambers are parallel to each other, such as image 3 As shown, they are pressure test room 1 28, pressure test room 2 29 and pressure test room 3 30 respectively. The 3 pressure test rooms can carry out 3 groups of tests at the same time, carry out controlled variable tests, and study under different pressures and different water temperatures, The corrosion of concrete specimens under...

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