CN103983559B - Reinforcing bar plays suggestion device and the reminding method of rust and chlorine ion concentration limit state - Google Patents
Reinforcing bar plays suggestion device and the reminding method of rust and chlorine ion concentration limit state Download PDFInfo
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- CN103983559B CN103983559B CN201410151891.0A CN201410151891A CN103983559B CN 103983559 B CN103983559 B CN 103983559B CN 201410151891 A CN201410151891 A CN 201410151891A CN 103983559 B CN103983559 B CN 103983559B
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- Prior art keywords
- rust
- reinforcing bar
- ion concentration
- string wire
- chlorine ion
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 59
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000004567 concrete Substances 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 21
- 238000005260 corrosion Methods 0.000 abstract description 21
- 238000011160 research Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
The invention discloses a kind of reinforcing bar and play suggestion device and the reminding method of rust and chlorine ion concentration limit state.Reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state and has included rust test specimen, shelf and test specimen tensioning device, and the described rust test specimen that rises is string wire；String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device.Being placed in corrosive environment by above-mentioned suggestion device, when string wire ruptures, when shelf flicks, namely prompting reinforcing bar plays rust, reaches chlorine ion concentration limit state.Apparatus of the present invention simple in construction, test is easy, reinforcing bar can be pointed out in time to play the generation of the events such as rust and chlorine ion concentration limit state, cannot be only used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosive environment reinforcing bar, it may also be used for the research stress effect impact on reinforcing bar corrosion resistance.
Description
[technical field]
The present invention relates to reinforced concrete structure service reliability analysis, particularly relate to a kind of under stress corrosion effect reinforcing bar play rust and the suggestion device of chlorine ion concentration limit state and reminding method.
[background technology]
In sea water and deicer salts environment, chloride ion triggers the main cause that steel bar corrosion is the deterioration of xoncrete structure performance.Effectively identify that reinforcing bar plays the generation of rust event, it is thus achieved that reinforcing bar plays the rust time and triggers the criticality chlorine ion concentration of steel bar corrosion, be the key technical problem of armored concrete, prestressed reinforced concrete structure service reliability analysis and life-cycle assessment.
Rebar surface chloride ion reaches the limit state of critical concentration and plays rust with reinforcing bar, can be considered as two simultaneous adjoint events.Usually, criticality chlorine ion concentration is defined as making the surface chlorine ion concentration of removing blunt of reinforcing steel bar；It is then the pitting potential that corrosion potential has exceeded reinforcing bar that reinforcing bar plays rust.By above-mentioned definition, derive many reinforcing bars and play characteristic index and the method for rust and criticality chlorine ion concentration, such as anode polarization, corrosion potential, electric current density, resistivity measurement etc..
Existing expert has developed dependence test technology.Chinese invention patent application disclosed in 15 days June in 2011 " a kind of method for monitoring corrosion cracks of reinforced concrete and sensor " (publication number CN102095677A), Chinese invention patent application disclosed in 27 days November in 2013 " wide range is based on the reinforcing steel corrosion monitoring sensor of fiber grating sensing technology " (publication number CN103411713A), Chinese invention patent application " steel bar corrosion time predicting device " (publication number CN202033274U) disclosed in 9 days November in 2011, it is used equally to reinforcing bar and plays the identification of corrosion event, but these monitoring steel bar corrosion methods all need the routine test of specific indexes, data conversion and deduction indirectly, practice operate easy not.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of simple in construction, and test is easy, accurately reflect reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state.
The present invention another to solve the technical problem that the reminding method being to provide that a kind of apparatus structure is simple, test is easy, accurately reflect reinforcing bar and rising rust and chlorine ion concentration limit state.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is, a kind of reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state, and including playing rust test specimen, shelf and test specimen tensioning device, the described rust test specimen that rises is string wire；String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state, and described string wire is the spring steel wire that diameter is not more than 0.16mm.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state, including cement paste test block or concrete test block, in the middle part embedment cement paste test block of string wire or concrete test block.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state, and including warning circuit, warning circuit includes power supply and display lamp, power supply and display lamp series connection；The two ends of warning circuit electrically connect with the two ends of string wire respectively.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration limit state, described shelf is the rustless steel stripe board of bending, one end of rustless steel stripe board includes installing hole, tension adjusting device includes regulating screw and nut, regulate the installing hole that screw traverse is described, the other end of string wire is fixed on the inner regulating screw, and described nut screws in the outer end regulating screw.
A kind of reinforcing bar plays the reminding method of rust and chlorine ion concentration limit state, the suggestion device of rust and chlorine ion concentration limit state is played including above-mentioned reinforcing bar, described suggestion device is placed in corrosive environment, when string wire ruptures, when shelf flicks, prompting reinforcing bar plays rust, reaches chlorine ion concentration limit state.
Above-described reinforcing bar plays the reminding method of rust and chlorine ion concentration limit state, and described suggestion device includes cement paste test block or concrete test block, in the middle part embedment cement paste test block of string wire or concrete test block.
Above-described reinforcing bar plays the reminding method of rust and chlorine ion concentration limit state, including stress calibrating installation, stress calibrating installation includes spring balance, one end of spring balance is fixed on one end of described suggestion device shelf, and the other end of spring balance is fixed on the other end of shelf by described test specimen tensioning device；When calibrating the stress of string wire, the pulling force according to the sectional area of string wire and target Stress calculation string wire, adjust test specimen tensioning device and make the value of thrust that spring balance shows reach the pulling force of string wire, measure the opening value of shelf；Being taken off by spring balance on shelf and change string wire, adjust test specimen tensioning device and make shelf reach above-mentioned opening value, namely bowstring reaches described target stress.
Above-described reinforcing bar plays the reminding method of rust and chlorine ion concentration limit state, the bowstring 75%-85% that target stress is its tensile strength at the test condition.
Apparatus of the present invention simple in construction, test is easy, reinforcing bar can be pointed out in time to play the generation of the events such as rust and chlorine ion concentration limit state, cannot be only used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosive environment reinforcing bar, it may also be used for the research stress effect impact on reinforcing bar corrosion resistance.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structural representation that the embodiment of the present invention 1 reinforcing bar plays rust and chlorine ion concentration limit state suggestion device.
Fig. 2 is the structural representation that the embodiment of the present invention 2 reinforcing bar plays rust and chlorine ion concentration limit state suggestion device.
Fig. 3 is the structural representation that the embodiment of the present invention 3 reinforcing bar plays rust and chlorine ion concentration limit state suggestion device.
Fig. 4 is the structural representation of the embodiment of the present invention 4 stress calibrating installation.
[detailed description of the invention]
The reinforcing bar of the embodiment of the present invention 1 plays the structure of the suggestion device of rust and chlorine ion concentration limit state as it is shown in figure 1, include string wire 2, shelf 1, tension adjustment screw 3 and tension adjustment nut 4.
In the present embodiment, string wire 2 has been rust test specimen, and string wire 2 is tightened by shelf 1.String wire 2 can adopt high-strength very thin steel wire, and diameter is not more than the spring steel wire of 0.16mm.
Shelf 1 rustless steel bar shaped plate benging forms, and the two ends of rustless steel stripe board are respectively arranged with an installing hole.Pin 8 is through the installing hole of rustless steel stripe board left end, and the left end of string wire 2 is fixed on the end of pin 8；The installing hole of tension adjustment screw 3 traverse rustless steel stripe board right-hand member, the right-hand member of string wire 2 is fixed on the inner of tension adjustment screw 3, tension adjustment nut 4 screws the outer end at tension adjustment screw 3, and rotating tension adjusting nut 4 can adjust the flexibility of shelf 1, changes the tension force of string wire 2 simultaneously.During stretch-draw string wire 2 to predetermined stress value, then with clamp nut 5 fixed adjustment nut 4, string wire is maintained by the stainless steel substrates 1 of bending stablizes lasting tension.
Selected steel wire string corrosion test section (each 30mm in left and right, optional midpoint or determine according to the actual requirements), and the remainder of steel wire string is added painting anti-corrosive primer (Plumbum preparatium, epoxy zinc-rich paint etc.).
Reinforcing bar for exposed reinforcement or employing reinforcing steel method plays rust and criticality chlorine ion concentration research, above-mentioned reinforcing bar can be risen the suggestion device of rust and chlorine ion concentration limit state, it is placed in corrosive environment (in corrosive environment simulation box or in the armored concrete actual working environment of needs monitoring), when string wire 2 ruptures, when shelf 1 flicks, prompting reinforcing bar plays rust, reaches chlorine ion concentration limit state.
The present invention is reached capacity state by the disconnected rust event that rises characterizing tension reinforcement of string wire rust and chlorine ion concentration, maintained, by stainless steel substrates, the target tension putting on string wire to preset by the ultimate tensile strength of string wire, and slightly below the latter, generally, the bowstring 75-85% that target stress is its tensile strength at the test condition.Once string wire corrosion cause the faint damage in its cross section, namely occur rust disconnected.The method of the present embodiment cannot be only used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosive environment reinforcing bar, it may also be used for the research stress effect impact on reinforcing bar corrosion resistance.
The embodiment of the present invention 2 reinforcing bar rise rust and chlorine ion concentration limit state suggestion device structure as shown in Figure 2, the basis of embodiment 1 adds cement paste test block (or concrete test block) 6, in middle part embedment cement paste test block (or concrete test block) 6 of string wire 2.The device of the present embodiment is mainly used in research cement paste or concrete test block the reinforcing bar of reinforcing bar and plays rust and criticality chlorine ion concentration, builds small size cement paste or concrete test block (such as 60mm × 60mm × 60mm test cube) in steel wire string corrosion test segment limit around string wire.When standard curing cement paste or concrete sample are to regulation age, arch unit and test block are integrally placed in corrosive environment.When string wire generation corrosion, cross section weaken and disconnect, arch stainless steel substrates resilience is opened, and notable prompting reinforcing bar plays rust, reaches chlorine ion concentration limit state.
The embodiment of the present invention 3 reinforcing bar plays the structure of rust and chlorine ion concentration limit state suggestion device as it is shown on figure 3, add warning circuit on the basis of embodiment 2, and warning circuit includes power supply B and display lamp L, power supply B and display lamp L series connection；The two ends of warning circuit electrically connect with the two ends of string wire 2 respectively.When cement paste test block (or concrete test block) 6 is dense, and the stress of string wire 2 is less, when string wire generation corrosion disconnects, but when can not extract out from test block 6 more greatly because of surface corrosion resistance, arch stainless steel substrates can not open in resilience, now the display lamp L of warning circuit extinguishes, and instruction string wire 2 reality disconnects, has reached reinforcing bar and has played rust and chlorine ion concentration limit state.
The calibrating installation of the embodiment of the present invention 4 string wire stress is as shown in Figure 4, stress calibrating installation includes spring balance 7, one end of spring balance 7 is fixed on one end of described suggestion device shelf 1, and the other end of spring balance 7 is fixed on the other end of shelf 1 by described test specimen tensioning device；When calibrating the stress of string wire 2, the pulling force according to the sectional area of string wire 2 and target Stress calculation string wire 2, adjust test specimen tensioning device and make the value of thrust that spring balance 7 shows reach the pulling force of string wire 2, measure the opening value B of shelf 1；Then as it is shown in figure 1, taken off by the spring balance 7 on shelf 1 and change string wire 2, adjusting test specimen tensioning device and make shelf 1 reach above-mentioned opening value B, namely bowstring 2 reaches target stress.
The present invention reaches capacity state above by the disconnected concentration playing rust event and chloride ion or other harmful ions characterizing tension reinforcement of string wire rust, the present invention is maintained, by stainless steel substrates, the target tension putting on string wire and presets by the tensile strength of string wire, and slightly below the latter；Once string wire corrosion cause the faint damage in its cross section, namely occur rust disconnected.Analog and method cannot be only used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosive environment reinforcing bar, it may also be used for the research stress effect impact on reinforcing bar corrosion resistance.
Claims (8)
1. reinforcing bar plays a suggestion device for rust and chlorine ion concentration limit state, including playing rust test specimen, it is characterised in that including shelf and test specimen tensioning device, the described rust test specimen that rises is string wire；String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device；Described string wire is the spring steel wire that diameter is not more than 0.16mm.
2. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration limit state, it is characterised in that include cement paste test block or concrete test block, in the middle part embedment cement paste test block of string wire or concrete test block.
3. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration limit state, it is characterised in that include warning circuit, and warning circuit includes power supply and display lamp, power supply and display lamp series connection；The two ends of warning circuit electrically connect with the two ends of string wire respectively.
4. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration limit state, it is characterized in that, described shelf is the rustless steel stripe board of bending, one end of rustless steel stripe board includes installing hole, tension adjusting device includes regulating screw and nut, regulating screw through described installing hole, the other end of string wire is fixed on the inner regulating screw, and described nut screws in the outer end regulating screw.
5. the reinforcing bar described in a claim 1 plays the reminding method of rust and chlorine ion concentration limit state, it is characterized in that, the suggestion device of rust and chlorine ion concentration limit state is played including the reinforcing bar described in claim 1, described suggestion device is placed in corrosive environment, when string wire ruptures, when shelf flicks, prompting reinforcing bar plays rust, reaches chlorine ion concentration limit state.
6. reinforcing bar according to claim 5 plays the reminding method of rust and chlorine ion concentration limit state, it is characterised in that described suggestion device includes cement paste test block or concrete test block, in the middle part embedment cement paste test block of string wire or concrete test block.
7. reinforcing bar according to claim 5 plays the reminding method of rust and chlorine ion concentration limit state, it is characterized in that, including stress calibrating installation, stress calibrating installation includes spring balance, one end of spring balance is fixed on one end of described suggestion device shelf, and the other end of spring balance is fixed on the other end of shelf by described test specimen tensioning device；When calibrating the stress of string wire, the pulling force according to the sectional area of string wire and target Stress calculation string wire, adjust test specimen tensioning device and make the value of thrust that spring balance shows reach the pulling force of string wire, measure the opening value of shelf；Being taken off by spring balance on shelf and change string wire, adjust test specimen tensioning device and make shelf reach above-mentioned opening value, namely bowstring reaches described target stress.
8. reinforcing bar according to claim 5 plays the reminding method of rust and chlorine ion concentration limit state, it is characterised in that the bowstring 75%-85% that target stress is its tensile strength at the test condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410151891.0A CN103983559B (en) | 2014-04-16 | 2014-04-16 | Reinforcing bar plays suggestion device and the reminding method of rust and chlorine ion concentration limit state |
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| CN201410151891.0A CN103983559B (en) | 2014-04-16 | 2014-04-16 | Reinforcing bar plays suggestion device and the reminding method of rust and chlorine ion concentration limit state |
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| CN103983559B true CN103983559B (en) | 2016-07-13 |
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| CN104266957B (en) * | 2014-09-03 | 2017-09-29 | 深圳大学 | Metal material plays the experimental rig and test method of rust and stress relation |
| CN106053190B (en) * | 2016-08-08 | 2018-10-09 | 爱德森（厦门）电子有限公司 | A method of making stress test specimen using metal erosion expansive force |
| CN107063991B (en) * | 2017-04-14 | 2020-03-10 | 中国石油天然气股份有限公司 | Dynamic safety assessment method and device for internal corrosion defects of conveying pipeline |
| CN107014744B (en) * | 2017-04-24 | 2019-06-18 | 湘潭大学 | A kind of Reinforcing Steel Bar In Reinforced Concrete Structure corrosion ratio monitoring device and monitoring method |
| CN107255539B (en) * | 2017-06-15 | 2023-08-04 | 深圳大学 | Stress calibration device and stress calibration method for rust test piece |
| CN107907476B (en) | 2017-12-28 | 2023-06-02 | 深圳大学 | Metal corrosion identification device and method |
| CN108844886B (en) * | 2018-06-28 | 2020-12-18 | 深圳大学 | Power-on acceleration simulation system and method for accurately controlling pitting corrosion |
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- 2014-04-16 CN CN201410151891.0A patent/CN103983559B/en not_active Expired - Fee Related
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