CN104459093A - Chloride ion concentration detection device of reinforced concrete structure and nondestructive testing method thereof - Google Patents
Chloride ion concentration detection device of reinforced concrete structure and nondestructive testing method thereof Download PDFInfo
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- CN104459093A CN104459093A CN201410828118.3A CN201410828118A CN104459093A CN 104459093 A CN104459093 A CN 104459093A CN 201410828118 A CN201410828118 A CN 201410828118A CN 104459093 A CN104459093 A CN 104459093A
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Abstract
The invention discloses a chloride ion concentration detection device of a reinforced concrete structure and a nondestructive testing method thereof. The device comprises detection single units (1) and a direct current power supply, wherein a stainless steel plate (3) is arranged in each detection single unit; a cover plate (2) of each detection single unit, a water-proof protective housing (1) and the surface of the reinforced concrete structure (4) form a closed cavity; electrolyte solution is injected into the cavity; the stainless steel plate (3) is also positioned in the cavity; a negative electrode of the direct current power supply is connected with reinforcement (4.1) of the reinforced concrete structure (4), and a positive electrode of the direct current power supply is connected with the stainless steel plate (3) of each detection single unit through a wire; the key point of the method is that the chlorine ion concentrations at different time points correspond to the chlorine ion concentrations of different depths of the reinforced concrete structure (4). According to the device and the method, the chlorine ion concentrations of different depths of the reinforced concrete structure (4) can be effectively detected, the detection process is convenient, and structural damage is not caused.
Description
Technical field
The present invention relates to the durable detection field of coastal reinforced concrete, is specifically that a kind of reinforced concrete structure is as the bridge pier of bridge, the chlorine ion concentration pick-up unit of cushion cap or harbour etc. and lossless detection method thereof.
Background technology
Coastal reinforced concrete structure is in the severe corrosion environment such as seawater and marine climate, and exist a large amount of to the mordant chlorion of reinforcing bar, therefore can its engineering life-span reach century-old requirement desired when people design, and is a quite severe problem.Not only China so, in world wide, because concrete structure durability is not enough, all can cause huge economic loss every year.
Chloride permeability enters concrete process and inwardly permeates gradually from top layer, when chloride permeability will corrosion reinforcing bar to the internal layer at the reinforcing bar place of reinforced concrete structure and when reaching chloride threshold concentration, for solving the endurance issues of reinforced concrete structure, must according to the chlorine ion concentration first recording reinforced concrete structure different depth, and the distribution situation of the chlorine ion concentration of each degree of depth is analyzed, thus judge whether that needs carry out dechlorination process.Because dechlorination device volume and comparatively large from weight average, assemble loaded down with trivial details, therefore dechlorination is then wasted time and energy when not needing dechlorination, when chlorine ion concentration is late close to the critical value then possibility that just dechlorinates.So the chlorine ion concentration of the different depth of reinforced concrete structure how accurately being detected, for judging whether to need dechlorination to provide foundation, is the key and the prerequisite that solve concrete structure durability problem.
The detection method of the chlorine ion concentration of the reinforced concrete structure of prior art is, from reinforced concrete structure surface to internal drilling, then detects the chlorine ion concentration of drilled powder.The drawback of this detection method is apparent, and first, testing process must first be holed, and labour intensity is large, waste time and energy, very inconvenient; And key is that the detection mode of hole drilling type can cause structural destruction and damage to it.
Summary of the invention
The technical matters that the present invention will solve is, provide a kind of effectively can detect the different depth of reinforced concrete structure chlorine ion concentration and the convenient chlorine ion concentration pick-up unit that can not cause the reinforced concrete structure of structural destruction of testing process.
A kind of technical solution of the present invention is, a kind of chlorine ion concentration pick-up unit of reinforced concrete structure is provided, it comprises detects monomer and direct supply, each detection monomer comprises water-proof protection cover and one piece of cover plate of a both ends open, the inside surface of cover plate is removable is connected with one piece of corrosion resistant plate, the edge of the interior end opening of water-proof protection cover is bonded in the surface of reinforced concrete structure by waterproof gasket cement, cover plate is removable is connected to the opening part of water-proof protection cover outer end and cover plate and water-proof protection cover outer end opening place seal, waterproofing protection is covered with inlet and liquid outlet, inlet and liquid outlet are equipped with stopper, cover plate, the surface of water-proof protection cover and reinforced concrete structure forms closed cavity, electrolyte solution is filled in this cavity, corrosion resistant plate is also positioned at this cavity, the negative pole of direct supply is through the bar connecting of wire and reinforced concrete structure, and the positive pole of direct supply is connected through the corrosion resistant plate of wire with each detection monomer.
Another technical matters that the present invention will solve is, provide a kind of effectively can detect the different depth of reinforced concrete structure chlorine ion concentration and the convenient lossless detection method that can not cause the chlorine ion concentration of the reinforced concrete structure of structural destruction of testing process.
A kind of technical solution of the present invention provides a kind of lossless detection method of chlorine ion concentration of reinforced concrete structure, and its step comprises:
A, detection monomer be arranged on reinforced concrete structure surface and fill electrolyte solution;
After b, one, interval section detection time, from the liquid outlet detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate that more renews apart by detecting the cover plate of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the outermost chlorine ion concentration of reinforced concrete structure;
After the detection time section that c, again interval are same, from the liquid outlet detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate that more renews apart by detecting the cover plate of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the secondary outer field chlorine ion concentration of reinforced concrete structure;
After d, interval is same more again a detection time section, derived by electrolyte solution from the liquid outlet detecting monomer, and detect the chlorine ion concentration in the electrolyte solution of deriving, this concentration is exactly the chlorine ion concentration of the internal layer of reinforced concrete structure.
This detection side's ratio juris is: when corrosion resistant plate to be communicated with DC power anode and the reinforcing bar of reinforced concrete structure is communicated with the negative pole of direct supply; like this; electric potential difference is produced between corrosion resistant plate and reinforcing bar; electronegative chlorion in reinforced concrete is moved to positive pole, enters into from concrete in the electrolyte solution of water-proof protection cover cavity.Equally, the migration of chlorion is also space-constrained, outermost chlorion moves in electrolyte solution certainly the earliest, and secondary outer field chlorion will move a little later, the chlorion of the position at internal layer i.e. reinforcing bar place can move in electrolyte solution the latest, namely the time is utilized to change the theory in space, the chlorine ion concentration of different time points the is corresponding chlorine ion concentration of reinforced concrete structure different depth, especially the chlorine ion concentration of internal layer is drawn from the chlorine ion concentration accurately measuring reinforced concrete structure different depth under the prerequisite destroyed xoncrete structure of not holing, thus need dechlorination to provide Data support and foundation for follow-up judging whether, and then improve the permanance of reinforced concrete structure.
The chlorine ion concentration pick-up unit of reinforced concrete structure of the present invention and lossless detection method compared with prior art, have the following advantages:
First, testing process is convenient, without the need to boring, significantly reduces labour intensity, convenient operation; And, reinforced concrete structure itself can not be damaged and damage; There is several technical bright spot in technical solution of the present invention, the time is utilized to change the theory in space, what art is good for strength solves the technical barrier must holed and could measure, and, during each detection, corrosion resistant plate all can take replacing apart, prevent corrosion resistant plate to be constantly corroded in testing process thinning, ensure that the precision of detection.And the volume of this detection monomer is little, the length detecting the width of monomer and the top board of water-proof protection cover equals the diameter of the reinforcing bar of reinforced concrete structure; like this; the field regime formed between stainless steel and reinforcing bar is little, and the chlorion around device in access to plant, can not improve measuring accuracy.
As improvement; water-proof protection cover is the square frame cover of the integral type be made up of top board, base plate and biside plate; base plate is provided with up big and down small lower tapered hole; lower tapered hole is communicated with liquid outlet upper end; top board is provided with up-small and down-big upper tapered hole; upper tapered hole is communicated with inlet lower end; this structure manufactures, assembling is all convenient; after assembling, fastness is good; and the design of lower tapered hole can guarantee that electrolyte solution drains only completely; guarantee the accuracy of testing result, upper tapered hole then can ensure that electrolyte solution can fill up detection monomer.
As also improving, the inner opening part of water-proof protection cover is provided with a circle crimping, like this, can increase the bond area on the surface of water-proof protection cover and reinforced concrete structure, and make it install more firm, waterproof effect is better.
As improving again, reinforced concrete structure is drilled with the first wire guide extending to reinforcing bar from surface, the free end of the wire be connected with DC power cathode is provided with a magnet termination, the reinforcing bar of this magnet termination and reinforced concrete structure adsorbs, and fills waterproof gasket cement, like this in the first wire guide, wire free ends is filled in the first wire guide, reinforcing bar can be lived by automatic absorbing in magnet termination on wire, and realize the conduction of direct supply and reinforcing bar, this installation process is convenient and simple.
As further improvement, through second wire guide on cover plate, the wire be communicated with DC power anode is communicated with corrosion resistant plate through the second wire guide, waterproof gasket cement is filled in second wire guide, like this, the termination of the second wire is located in the inside surface of cover plate, as long as each inside surface new corrosion resistant plate being fixed on cover plate, just naturally completes being communicated with of the second wire and corrosion resistant plate.
As improving further again, it comprises multiple detection monomer, multiple detection monomer forms a line, like this, the fluctuation of water table district of reinforced concrete structure is subject to tidal effect, the chlorine ion concentration of the differing heights of reinforced concrete structure is different, and the multiple detection monomers formed a line can detect for the chlorine ion concentration of differing heights very easily, and then effectively detect the concrete chlorine ion concentration distribution situation being positioned at fluctuation of water table district, and the cathode conductor of the whole and bar connecting of above-mentioned multiple detection monomer shares first wire guide, therefore only need to bore very little first wire guide, need compared to existing technology to bore at each height to remove a measured hole, technical solution of the present invention is obvious convenient and swift laborsaving.
Accompanying drawing explanation
Fig. 1 is the side sectional structure schematic diagram that a detection monomer of the chlorine ion concentration pick-up unit of reinforced concrete structure of the present invention is arranged on reinforced concrete structure.
Fig. 2 is that the multiple detection monomer of row of the chlorine ion concentration pick-up unit of reinforced concrete structure of the present invention is arranged on reinforced concrete structure faces structural representation.
Shown in figure 1, water-proof protection cover, 1.1, top board, 1.2, base plate, 1.3, side plate; 1.4, crimping, 2, cover plate, the 2.1, second wire guide; 3, corrosion resistant plate, 4, reinforced concrete structure, 4.1, reinforcing bar; 4.2, the first wire guide, 4.3, outermost layer, 4.4, secondary skin; 4.5, internal layer, 5, inlet, 6, liquid outlet; 7, lower tapered hole, 8, upper tapered hole, 9, magnet termination.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1 and Figure 2, the chlorine ion concentration pick-up unit of reinforced concrete structure of the present invention, it comprises multiple detection monomer and direct supply, wherein the corresponding direct supply of each detection monomer.Multiple as three detection monomers form a line, from high toward the low fluctuation of water table district being distributed in the surface of reinforced concrete structure 4.
Each detection monomer comprises water-proof protection cover 1 and one piece of cover plate 2 of a both ends open.Water-proof protection cover 1 is the square frame cover of the integral type be made up of top board 1.1, base plate 1.2 and biside plate 1.3.The removable connection of inside surface of cover plate 2 is as being bolted with one piece of corrosion resistant plate 3.The inner opening part of water-proof protection cover 1 is provided with a circle crimping 1.4, and crimping 1.4 is bonded in the surface of reinforced concrete structure 4 by waterproof gasket cement.The base plate 1.2 of water-proof protection cover 1 is provided with liquid outlet 6 and up big and down small lower tapered hole 7, and lower tapered hole 7 is communicated with liquid outlet 6 upper end; The top board 1.1 of water-proof protection cover 1 is provided with inlet 5 and up-small and down-big upper tapered hole 8, and upper tapered hole 8 is communicated with inlet 5 lower end.Inlet 5 and liquid outlet 6 are equipped with stopper, and the opening and closing of inlet 5 and liquid outlet 6 is all realized by the stopper of correspondence.Cover plate 2 is removable is connected to the opening part of water-proof protection cover 1 outer end and cover plate 2 and water-proof protection cover 1 outer end opening place seals, and specifically, cover plate 2 inside surface is also fixing by a circle O-ring seal, and the opening of cover plate 2 and water-proof protection cover 1 outer end is spirally connected fixing.Cover plate 2, water-proof protection cover 1 form closed cavity with the surface of reinforced concrete structure 4, and fill electrolyte solution in this cavity, corrosion resistant plate 3 is also positioned at this cavity.The negative pole of direct supply is connected with the reinforcing bar 4.1 of reinforced concrete structure 4 through wire, namely reinforced concrete structure 4 is drilled with the first wire guide 4.2 extending to reinforcing bar 4.1 from surface, the free end of the wire be connected with DC power cathode is provided with a magnet termination 9, this magnet termination 9 is adsorbed with the reinforcing bar 4.1 of reinforced concrete structure 4, fills waterproof gasket cement in the gap between the first wire guide 4.2 and this wire.The positive pole of direct supply is connected through the corrosion resistant plate 3 of wire with each detection monomer, i.e. through second wire guide 2.1 on cover plate 2, the wire be communicated with DC power anode is communicated with corrosion resistant plate 3 through the second wire guide 2.1, fills waterproof gasket cement in the gap between the second wire guide 2.1 and this wire.
The lossless detection method of the chlorine ion concentration of reinforced concrete structure of the present invention, its step is as follows.
A, detection monomer be arranged on reinforced concrete structure 4 surface and fill electrolyte solution; Specifically; the inner opening place of water-proof protection cover 1 and reinforced concrete structure 4 surface are bondd; corrosion resistant plate 3 is screwed onto cover plate 2 inside surface and makes corrosion resistant plate 3 and the wire that is connected with DC power anode is communicated with; cover plate 2 is spirally connected with the opening part of water-proof protection cover 1 outer end and seals; and inject electrolyte solution through inlet 5, DC power cathode is communicated with the reinforcing bar 4.1 of reinforced concrete structure 4.
After b, one, interval section detection time, if section each detection time is 24 hours, namely after 24 hours, from the liquid outlet 6 detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate 3 that more renews apart by detecting the cover plate 2 of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the chlorine ion concentration of reinforced concrete structure 4 outermost layer 4.3.
After the detection time section that c, again interval are same, after 48 hours, from the liquid outlet 6 detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate 3 that more renews apart by detecting the cover plate 2 of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the chlorine ion concentration of time skin 4.4 of reinforced concrete structure 4.
After d, interval is same more again a detection time section, after 72 hours, derived by electrolyte solution from the liquid outlet 6 detecting monomer, and detect the chlorine ion concentration in the electrolyte solution of deriving, this concentration is exactly the chlorine ion concentration of the internal layer 4.5 of reinforced concrete structure 4.
The outermost layer 4.3 of reinforced concrete structure 4, secondary outer 4.4 all identical with the thickness of internal layer 4.5, the surface of reinforced concrete structure 4 and the distance of reinforcing bar 4.1 are d, then the thickness of above-mentioned three layers is 1/3rd of thickness d.
Claims (7)
1. the chlorine ion concentration pick-up unit of a reinforced concrete structure, it is characterized in that: it comprises detects monomer and direct supply, each detection monomer comprises water-proof protection cover (1) and one piece of cover plate (2) of a both ends open, the inside surface of cover plate (2) is removable is connected with one piece of corrosion resistant plate (3), the edge of the interior end opening of water-proof protection cover (1) is bonded in the surface of reinforced concrete structure (4) by waterproof gasket cement, cover plate (2) is removable is connected to the opening part of water-proof protection cover (1) outer end and cover plate (2) and water-proof protection cover (1) outer end opening place seal, water-proof protection cover (1) is provided with inlet (5) and liquid outlet (6), inlet (5) and liquid outlet (6) are equipped with stopper, cover plate (2), water-proof protection cover (1) forms closed cavity with the surface of reinforced concrete structure (4), electrolyte solution is filled in this cavity, corrosion resistant plate (3) is also positioned at this cavity, the negative pole of direct supply is connected with the reinforcing bar (4.1) of reinforced concrete structure (4) through wire, and the positive pole of direct supply is connected with the corrosion resistant plate (3) of each detection monomer through wire.
2. the chlorine ion concentration pick-up unit of reinforced concrete structure according to claim 1; it is characterized in that: water-proof protection cover (1) is the square frame cover of the integral type be made up of top board (1.1), base plate (1.2) and biside plate (1.3); base plate (1.2) is provided with up big and down small lower tapered hole (7); lower tapered hole (7) is communicated with liquid outlet (6) upper end; top board (1.1) is provided with up-small and down-big upper tapered hole (8), and upper tapered hole (8) is communicated with inlet (5) lower end.
3. the chlorine ion concentration pick-up unit of reinforced concrete structure according to claim 1, is characterized in that: the inner opening part of water-proof protection cover (1) is provided with a circle crimping (1.4).
4. the chlorine ion concentration pick-up unit of reinforced concrete structure according to claim 1, it is characterized in that: reinforced concrete structure (4) is drilled with the first wire guide (4.2) extending to reinforcing bar (4.1) from surface, the free end of the wire be connected with DC power cathode is provided with a magnet termination (9), this magnet termination (9) is adsorbed with the reinforcing bar (4.1) of reinforced concrete structure (4), and the first wire guide fills waterproof gasket cement in (4.2).
5. the chlorine ion concentration pick-up unit of reinforced concrete structure according to claim 1, it is characterized in that: upper through second wire guide (2.1) of cover plate (2), the wire be communicated with DC power anode is communicated with corrosion resistant plate (3) through the second wire guide (2.1), and the second wire guide fills waterproof gasket cement in (2.1).
6. the chlorine ion concentration pick-up unit of reinforced concrete structure according to claim 1, is characterized in that: it comprises multiple detection monomer, and multiple detection monomer forms a line.
7. a lossless detection method for the chlorine ion concentration of reinforced concrete structure, is characterized in that, its step comprises:
A, detection monomer be arranged on reinforced concrete structure (4) surface and fill electrolyte solution;
After b, one, interval section detection time, from the liquid outlet (6) detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate (3) that more renews apart by detecting the cover plate (2) of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the chlorine ion concentration of reinforced concrete structure (4) outermost layer (4.3);
After the detection time section that c, again interval are same, from the liquid outlet (6) detecting monomer, electrolyte solution is derived, and take the corrosion resistant plate (3) that more renews apart by detecting the cover plate (2) of monomer and inject new electrolyte solution, detect the chlorine ion concentration in the electrolyte solution of deriving in this step, this concentration is exactly the chlorine ion concentration of time outer (4.4) of reinforced concrete structure (4);
After d, interval is same more again a detection time section, from the liquid outlet (6) detecting monomer, electrolyte solution is derived, and the chlorine ion concentration detected in the electrolyte solution of deriving, this concentration is exactly the chlorine ion concentration of the internal layer (4.5) of reinforced concrete structure (4).
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| CN104849307A (en) * | 2015-04-22 | 2015-08-19 | 昆明理工大学 | Heatable steel bar for nondestructive test and its preparation method and use method |
| CN105672499A (en) * | 2016-01-29 | 2016-06-15 | 浙江大学宁波理工学院 | Device and method for performing construction by taking marine sand as concrete fine aggregates |
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| CN105735465A (en) * | 2016-01-29 | 2016-07-06 | 浙江大学宁波理工学院 | Reutilization method for building debris at coastal and island areas |
| CN105925989A (en) * | 2016-06-22 | 2016-09-07 | 苏交科集团股份有限公司 | Electrochemical antiseptic device using latticed titanium anode and protection device |
| CN112390662A (en) * | 2020-10-27 | 2021-02-23 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
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| CN105735465A (en) * | 2016-01-29 | 2016-07-06 | 浙江大学宁波理工学院 | Reutilization method for building debris at coastal and island areas |
| CN105925989A (en) * | 2016-06-22 | 2016-09-07 | 苏交科集团股份有限公司 | Electrochemical antiseptic device using latticed titanium anode and protection device |
| CN112390662A (en) * | 2020-10-27 | 2021-02-23 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
| CN112390662B (en) * | 2020-10-27 | 2022-01-25 | 上海交通大学 | Electrochemical repair method for dual degradation of alkali aggregate damage and steel bar corrosion |
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Address after: 315100, Qian 1, Yinzhou District, Ningbo, Zhejiang, Hunan Road Patentee after: Zhejiang University of science and engineering Ningbo Address before: 315100 No. 1, Qian Hunan Road, Ningbo Higher Education Park, Zhejiang Patentee before: Ningbo Institute of Technology, Zhejiang University |