Device and method for repairing concrete structure damaged by salt through two-step process
A concrete structure and concrete technology, applied in the field of electrochemical repair, can solve the problem of low precipitation efficiency of harmful ions, and achieve the effects of improving migration ability, convenient operation and improving precipitation rate
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Embodiment 1
[0026] Such as figure 1 As shown, the two-step method of the present invention repairs the device of salt damage concrete structure, comprises the steel bar that is positioned at concrete 1 as cathode 2, the notch and the electrolytic cell 3 that the surface of concrete 1 seals fits, is positioned at the electrolytic solution 4 in electrolytic cell 3, An anode 5 immersed in the electrolyte 4, a DC power supply 6 for supplying power to the cathode 2 and the anode 5, and a pH indicator 7, the anode is a stainless steel mesh, the electrolytic cell 3 has an inlet 8 and an outlet 9 of the electrolyte 4, and a pH indicator 7 The probe penetrates the cell wall of the electrolytic cell 3 and is in contact with the electrolyte 4, and the electrolytic cell 3 and the surface of the concrete 1 are in contact with a water-swelling water-stop bar 10, and the water-stop bar 10 is A waterstop 11 is provided between the surface of the concrete 1, and the notch of the electrolytic cell 3 has an...
Embodiment 2
[0027] Embodiment 2 two-step method repairs the concrete structure of salt damage
[0028] The mass ratio of each component of the concrete structure is: cement: sand: gravel: water = 1: 1.40: 2.60: 0.49, that is, to configure a cubic meter of fresh concrete, 210kg of water, 429kg of cement, 600kg of medium sand and 1115kg of particle size are used 5 ~ 16mm stones, among them, 2% of the cement mass that is 8.58kg of sodium chloride is mixed in the concrete casting, the water-cement ratio is 0.5, the depth of the protective layer is 40mm, the standard maintenance is 28 days, and it is placed in the room for 5 months Finally, the electrochemical impedance spectrum and weak polarization curves of the steel bars in the concrete specimens before repair were measured with the electrochemical workstation Reference600, and it was found that the steel bars had been corroded. At the same time, along the depth direction of the concrete protective layer, drill holes to take powder, and us...
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