CN109881903A - The protection construction method of concrete column reinforcing bar head - Google Patents
The protection construction method of concrete column reinforcing bar head Download PDFInfo
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- CN109881903A CN109881903A CN201910203235.3A CN201910203235A CN109881903A CN 109881903 A CN109881903 A CN 109881903A CN 201910203235 A CN201910203235 A CN 201910203235A CN 109881903 A CN109881903 A CN 109881903A
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Abstract
The invention discloses a kind of protection construction methods of concrete column reinforcing bar head.The step of protection construction method are as follows: 1) clean concrete column reinforcing bar head to be protected；2) antirust agent is coated on concrete column reinforcing bar head；3) sleeve is protected on set on concrete column reinforcing bar head, protection sleeve is the tube body of an end closure；4) before carrying out next procedure, protection sleeve is extracted, antirust agent is removed.The present invention can be exposed with effective protection steel bar end, avoid or slow down steel bar end being contaminated and corrode.
Description
Technical field
The invention belongs to building element protection technique fields, and in particular to a kind of protection construction party of concrete column reinforcing bar head
Method.
Background technique
Next procedure interval time mistake in current building construction process, during casting concrete or after pouring
Long, for reinforcing bar column cap without any safeguard measure, exposed steel bar end interface pollution, corrosion are serious.Steel bar end derusting using mechanical or
Artificial mode is polished, and low efficiency increases construction cost.
Summary of the invention
The object of the present invention is to provide a kind of protection construction methods of concrete column reinforcing bar head, can be exposed with effective protection
Steel bar end, avoids or slows down steel bar end being contaminated and corrode.
To achieve the above object, the invention adopts the following technical scheme:
A kind of protection construction method of concrete column reinforcing bar head, comprising the following steps:
1) concrete column reinforcing bar head to be protected is cleaned；
2) antirust agent is coated on concrete column reinforcing bar head；
3) sleeve is protected on set on concrete column reinforcing bar head, protection sleeve is the tube body of an end closure；
4) before carrying out next procedure, protection sleeve is extracted, antirust agent is removed.
In above-mentioned technical proposal:
The antirust agent is preferably water soluble anti-rust agent.Water soluble anti-rust agent can be miscible with water, and environmental-protecting performance is outstanding, no
Containing benzene homologues such as toluene, ethylbenzene, dimethylbenzene, have no irritating odor, it is harmless to the human body；And it is easy to use, it can be normal
Antirust treatment is carried out under temperature in a variety of methods such as dip-coating, spray, brushing.In general, since water soluble anti-rust agent is easy by rainwater
It washes away, water soluble anti-rust agent is seldom applied to outdoor reinforcing bar head protection by those skilled in the art.But the application is by adding
Dress protection sleeve, effectively overcomes the defect using water soluble anti-rust agent, and sleeve protection and water soluble anti-rust agent protection are two-tube neat
Under, the two is synergistic, can obtain excellent rust-proof effect.
Preferably, present invention also provides a kind of water soluble anti-rust agent, which includes following parts by weight
Component: 30~40 parts of water, 40~55 parts of film forming agent, 1~3 part of corrosion inhibiter, 0.2~0.5 part of surfactant.
Wherein, the film forming agent preparation method the following steps are included:
1) water of phosphate function monomer, the lauryl sodium sulfate of 1/4~1/3 volume and 1/3~1/2 volume is mixed
Mixed liquor is made, carries out pre- cream for stirring in mixed liquor is added dissolved with the butyl acrylate, styrene and acrylic acid of epoxy resin
Change, obtains pre-emulsion；
2) water of surplus and lauryl sodium sulfate are mixed and heated to 80~90 DEG C of polymerization temperature, are then added 1/3
Ammonium persulfate progress 0~60min of polyase 13 of the pre-emulsion of~1/2 volume, 1/3~1/2 weight, is then injected into remaining pre-
Emulsion and ammonium persulfate keep 60~180min of polymerization temperature, and it is 7~8 that pH value is adjusted after being cooled to room temperature, filtering and discharging
Up to film forming agent；
Wherein, the parts by weight of each raw material of related film forming agent are as follows:
4~6 parts of phosphate function monomer, 2~3 parts of lauryl sodium sulfate, 45~50 parts of water, 5~8 parts of epoxy resin,
15~20 parts of butyl acrylate, 18~22 parts of styrene, 0.5~1.5 part of acrylic acid, 2~3 parts of ammonium persulfate part.
Wherein, optimum weight part of the component of the water soluble anti-rust agent are as follows:
35 parts of water, 50 parts of film forming agent, 2 parts of corrosion inhibiter, 0.3 part of surfactant.
Wherein, the corrosion inhibiter is selected from tungstates, molybdate, phosphate or silicate.
Wherein, the pH adjusting agent is selected from carbonate, sodium hydroxide, potassium hydroxide or borate.
Wherein, the surfactant is selected from polysorbas20, polysorbate60 or Tween 80.
The application also provides the preparation method of above-mentioned protection sleeve, and step includes: that selection caliber is greater than reinforcing bar to be protected
The pipeline of head diameter is sealed one end of casing using adhesive plaster as casing completely, and the other end is open, the adhesive plaster of sealing end
Adhesive surface is towards in casing pipe.
Preferably, described sleeve pipe is pvc pipe, caliber be greater than steel bar end 2~4mm of diameter, the length is 200~
400mm。
Preferably, the adhesive plaster is transparent rubberized fabric or electrical adhesive tape.
Production protection sleeve is sealed using adhesive plaster, preparation method is simple, and the sealing end after being made can be used to cling steel bar end
End so that protection sleeve placement it is more firm.Moreover, water soluble anti-rust agent provided by the present application is after use, moreover it is possible to
Reinforcing bar is allowed to keep good adhesive force, the stickup for not interfering with protection sleeve is placed.
The beneficial effects of the present invention are:
By the present invention in that carrying out antirust guarantor with two methods of antirust agent and protection sleeve, while to concrete column reinforcing bar head
Shield, works along both lines, can the exposed steel bar end of effective protection, avoid or slow down steel bar end being contaminated and corrode, avoid and adopt
Mode mechanically or manually is polished the various drawbacks of bring that derust, and is improved construction efficiency, is reduced construction cost.
Specific embodiment
The present invention will be described below, and the specific embodiments described herein are merely illustrative of the invention,
It is not intended to limit the present invention.
The preparation of 1 water soluble anti-rust agent of embodiment
Water soluble anti-rust agent is made of the component of following parts by weight: 35 parts of water, 50 parts of film forming agent, and 2 parts of corrosion inhibiter, surface
0.3 part of activating agent.
The preparation method of the film forming agent is the following steps are included: 1) by phosphate function monomer, the dodecyl of 1/3 volume
Sodium sulphate and the water of 1/2 volume are mixed and made into mixed liquor, will be dissolved with the butyl acrylate, styrene and acrylic acid of epoxy resin
Stirring in mixed liquor is added and carries out pre-emulsification, obtains pre-emulsion；2) by the water of surplus and lauryl sodium sulfate Hybrid Heating
Ammonium persulfate to 85 DEG C of polymerization temperature, pre-emulsion, 1/2 weight that 1/3 volume is then added carries out polymerization 40min, so
After inject remaining pre-emulsion and ammonium persulfate, keep polymerization temperature 120min, it is 7 that pH value is adjusted after being cooled to room temperature, mistake
It filters out and expects up to film forming agent.
Wherein, the parts by weight of each raw material of related film forming agent are as follows: 5 parts of phosphate function monomer, lauryl sodium sulfate
2.5 parts, 48 parts of water, 6 parts of epoxy resin, 18 parts of butyl acrylate, 20 parts of styrene, 1.2 parts of acrylic acid, ammonium persulfate part
2.5 part.
Wherein, the corrosion inhibiter is tungstates.The pH adjusting agent is sodium hydroxide.The surfactant is tween
60。
The preparation of 2 water soluble anti-rust agent of embodiment
Water soluble anti-rust agent is made of the component of following parts by weight: 30 parts of water, 55 parts of film forming agent, and 1 part of corrosion inhibiter, surface
0.5 part of activating agent.
The preparation method of the film forming agent is the following steps are included: 1) by phosphate function monomer, the dodecyl of 1/4 volume
Sodium sulphate and the water of 1/2 volume are mixed and made into mixed liquor, will be dissolved with the butyl acrylate, styrene and acrylic acid of epoxy resin
Stirring in mixed liquor is added and carries out pre-emulsification, obtains pre-emulsion；2) by the water of surplus and lauryl sodium sulfate Hybrid Heating
Ammonium persulfate to 80 DEG C of polymerization temperature, pre-emulsion, 1/3 weight that 1/2 volume is then added carries out polymerization 60min, so
After inject remaining pre-emulsion and ammonium persulfate, keep polymerization temperature 60min, it is 8 that pH value is adjusted after being cooled to room temperature, mistake
It filters out and expects up to film forming agent；
Wherein, the parts by weight of each raw material of related film forming agent are as follows: 4 parts of phosphate function monomer, lauryl sodium sulfate 3
Part, 45 parts of water, 8 parts of epoxy resin, 15 parts of butyl acrylate, 22 parts of styrene, 0.5 part of acrylic acid, 3 parts of ammonium persulfate part.
Wherein, the corrosion inhibiter is molybdate.The pH adjusting agent is potassium hydroxide.The surfactant is tween
20。
The preparation of 3 water soluble anti-rust agent of embodiment
Water soluble anti-rust agent is made of the component of following parts by weight: 40 parts of water, 40 parts of film forming agent, and 3 parts of corrosion inhibiter, surface
0.2 part of activating agent.
The preparation method of the film forming agent is the following steps are included: 1) by phosphate function monomer, the dodecyl of 1/3 volume
Sodium sulphate and the water of 1/3 volume are mixed and made into mixed liquor, will be dissolved with the butyl acrylate, styrene and acrylic acid of epoxy resin
Stirring in mixed liquor is added and carries out pre-emulsification, obtains pre-emulsion；2) by the water of surplus and lauryl sodium sulfate Hybrid Heating
Ammonium persulfate to 90 DEG C of polymerization temperature, pre-emulsion, 1/2 weight that 1/3 volume is then added carries out polyase 13 0min, so
After inject remaining pre-emulsion and ammonium persulfate, keep polymerization temperature 180min, it is 7 that pH value is adjusted after being cooled to room temperature, mistake
It filters out and expects up to film forming agent；
Wherein, the parts by weight of each raw material of related film forming agent are as follows: 6 parts of phosphate function monomer, lauryl sodium sulfate 2
Part, 50 parts of water, 5 parts of epoxy resin, 20 parts of butyl acrylate, 18 parts of styrene, 1.5 parts of acrylic acid, 2 parts of ammonium persulfate part.
Wherein, the corrosion inhibiter is silicate.The pH adjusting agent is borate.The surfactant is Tween 80.
The protection construction method of 4 concrete column reinforcing bar head of embodiment
1.1 project names: certain mansion project
1.2 project profiles: this engineering is located at Nanning, engineering overall floorage 118195.01m2, wherein underground is built
Build area 55657.90m2, 1 layer of basement, 47090.04 ㎡ of superstructure area, it is building that aerial part, which has the building 1#~3#,
23 layers on the ground, 3 layers of annex, building general height 72.3m；Main structure type is frame-shear structure, and in September, 2016 goes into operation.
1.3 construction methods:
Construction method of the invention is applied to need at solidifying earth pillar steel bar end to be protected, the specific steps are as follows:
1) it selects caliber 2~4mm pipeline (pvc pipe) bigger than steel bar end diameter to be protected as casing, is by casing-pipe cutting
The length of 200~400mm, incision polish flat；
2) one end of casing is sealed completely using adhesive plaster (transparent rubberized fabric or electrical adhesive tape), the other end is open, sealing end
Adhesive plaster adhesive surface towards in casing pipe；
3) before concreting, concrete column reinforcing bar head to be protected is cleaned, coats implementation on concrete column reinforcing bar head
Antirust agent made from example 1；
4) casing is inserted in by open end on every vertical steel bar end to be protected, by casing sealing end adhesive plaster and steel bar end
Firm pasting；Before carrying out next procedure, protection sleeve is extracted, antirust agent and adhesive plaster are removed, by casing recovery.
1.4 condition of construction: before submitting application to the present invention, 3# building-owner's body has bound, 1~7 layer of progress masonry construction；?
In work progress, the steel bar end of this construction method is used not occur phenomenon of getting rusty.
1.5 performance analyses: the engineering construction is constructed using this method, and the integral construction duration shifts to an earlier date 10d completion, the warp of acquisition
Benefit of helping is as shown in the table.
As can be seen from the above table, construction method of the invention can obtain significant economic benefit, can commercially take
Obtain huge success.And the construction method reduces the probability of the first-born rust corrosion of exposed steel bar, and work progress does not need manually
Or mechanical grinding, it reduces to extraneous influence of noise, reduces the construction time, while there is significant social benefit and environment
Benefit.
The experiment of 1 outdoor exposure antirust of test example
It is subjects that 160 unrusted concrete column reinforcing bar heads are chosen in grouping, and reinforcing bar is HRB335 screw-thread steel.By steel
Muscle head is divided into 8 groups, every group 20.Every group of processing method is as follows:
| Group | Processing method |
| A | Control group, no antirust treatment |
| B | Only it is cased with protection sleeve |
| C | It is merely coated with water soluble anti-rust agent one |
| D | It is merely coated with water soluble anti-rust agent two |
| E | It is merely coated with the antirust agent of embodiment 1 |
| F | It is coated with water soluble anti-rust agent one, and is cased with protection sleeve |
| G | It is coated with water soluble anti-rust agent two, and is cased with protection sleeve |
| H | It is coated with the antirust agent of embodiment 1, and is cased with protection sleeve |
Wherein, the component (weight percent) of water soluble anti-rust agent one are as follows: sodium nitrite 8wt%, sodium carbonate 0.5wt%,
The water of surplus.The component (weight percent) of water soluble anti-rust agent two are as follows: aliphatic ester 20wt%, organic amine 25wt%, heterocycle
The water of compound 20wt%, surplus.
8 groups of steel bar ends are exposed to outdoor, during test from first day, mass fraction of every 5 days sprays is 3%
Sodium chloride solution, the ponding natural evaporation after spray.Test period was 8 week, and temperature during which is between 20~30 DEG C
Fluctuation.The situation of getting rusty of record steel bar end, statistics are as follows: daily
As can be seen from the above table: when protection sleeve is used alone, starting rusty stain occur within one month or so；It is used alone conventional
Water soluble anti-rust agent be more than that may occur in which rusty stain after a week, the antirust agent that embodiment 1 is used alone can be there are two star
The antirust time of phase；Simultaneously using conventional water soluble antirust agent and protection sleeve, can by nearly bimestrial antirust time,
And after conventional water soluble antirust agent to be replaced with to the antirust agent of embodiment 1, better effect.It demonstrates, while using water-soluble
Antirust agent and protection sleeve, can obtain significant synergistic effect.
2 adhesive force test experiments of test example
Selection Q235 carbon steel sheet is test piece, and respectively with after the antirust agent spray treatment in Examples 1 to 3, room temperature is dry
Dry 1d.Then the finishing coat twice that spraying alkyd reconciles, drying at room temperature 2d.According to GB/T9286-1998, its adhesive force is tested.Point
Test twice, for the first time not carry out neutral salt spray test to carbon steel sheet before, second real to carry out 7 neutral salt spray periods
After testing.The method of neutral smog experiment, is detailed in GB/T10125-1997.Experimental result is as follows:
| Antirust agent is used in test | First time test result | Test the speed result for the second time |
| Embodiment 1 | 1 grade of paint film adhesion | 2 grades of paint film adhesion |
| Embodiment 2 | 1 grade of paint film adhesion | 2 grades of paint film adhesion |
| Embodiment 3 | 1 grade of paint film adhesion | 2 grades of paint film adhesion |
As can be seen from the above table, the water soluble anti-rust agent of the embodiment of the present application 1~3 can act on antirust object well
Surface has excellent film forming buffer action.Reinforcing bar still has stronger adhesive force after, the protection sleeve energy with adhesive plaster
Enough jails are solidly set on reinforcing bar.
Claims (10)
1. the protection construction method of concrete column reinforcing bar head, which comprises the following steps:
1) concrete column reinforcing bar head to be protected is cleaned；
2) antirust agent is coated on concrete column reinforcing bar head；
3) sleeve is protected on set on concrete column reinforcing bar head, protection sleeve is the tube body of an end closure；
4) before carrying out next procedure, protection sleeve is extracted, antirust agent is removed.
2. protection construction method according to claim 1, it is characterised in that: the antirust agent is water soluble anti-rust agent.
3. protection construction method according to claim 2, which is characterized in that the water soluble anti-rust agent includes following weight
The component of part: 30~40 parts of water, 40~55 parts of film forming agent, 1~3 part of corrosion inhibiter, 0.2~0.5 part of surfactant；
The preparation method of the film forming agent is the following steps are included: 1) by phosphate function monomer, the dodecane of 1/4~1/3 volume
Base sodium sulphate and the water of 1/3~1/2 volume are mixed and made into mixed liquor, by dissolved with the butyl acrylate of epoxy resin, styrene and
Acrylic acid is added stirring in mixed liquor and carries out pre-emulsification, obtains pre-emulsion；2) water of surplus and lauryl sodium sulfate are mixed
Conjunction is heated to 80~90 DEG C of polymerization temperature, and the pre-emulsion of 1/3~1/2 volume, the over cure of 1/3~1/2 weight is then added
Sour ammonium carries out 0~60min of polyase 13, is then injected into remaining pre-emulsion and ammonium persulfate, keep polymerization temperature 60~
180min, it is 7~8 that pH value is adjusted after being cooled to room temperature, and filtering and discharging is up to film forming agent；
Wherein, the parts by weight of each raw material of related film forming agent are as follows: 4~6 parts of phosphate function monomer, lauryl sodium sulfate 2
~3 parts, 45~50 parts of water, 5~8 parts of epoxy resin, 15~20 parts of butyl acrylate, 18~22 parts of styrene, acrylic acid 0.5~
1.5 parts, 2~3 parts of ammonium persulfate part.
4. protection construction method according to claim 3, which is characterized in that the parts by weight of the component are as follows: 35 parts of water, at
50 parts of film, 2 parts of corrosion inhibiter, 0.3 part of surfactant.
5. protection construction method according to claim 3 or 4, it is characterised in that: the corrosion inhibiter is selected from tungstates, molybdic acid
Salt, phosphate or silicate.
6. protection construction method according to claim 3 or 4, it is characterised in that: the pH adjusting agent is selected from carbonate, hydrogen
Sodium oxide molybdena, potassium hydroxide or borate.
7. protection construction method according to claim 3 or 4, it is characterised in that: the surfactant be selected from polysorbas20,
Polysorbate60 or Tween 80.
8. protection construction method according to claim 1, which is characterized in that it is described protection sleeve preparation method the step of
It include: that caliber is selected, as casing, to seal one end of casing completely using adhesive plaster greater than the pipeline of steel bar end diameter to be protected,
The other end is open, and the adhesive surface of the adhesive plaster of sealing end is towards in casing pipe.
9. protection construction method according to claim 8, it is characterised in that: described sleeve pipe is pvc pipe, caliber be greater than
Steel bar end 2~4mm of diameter, the length is 200~400mm.
10. protection construction method according to claim 8, it is characterised in that: the adhesive plaster is transparent rubberized fabric or electrician's glue
Cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203235.3A CN109881903A (en) | 2019-03-18 | 2019-03-18 | The protection construction method of concrete column reinforcing bar head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203235.3A CN109881903A (en) | 2019-03-18 | 2019-03-18 | The protection construction method of concrete column reinforcing bar head |
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| CN109881903A true CN109881903A (en) | 2019-06-14 |
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ID=66932813
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910203235.3A Pending CN109881903A (en) | 2019-03-18 | 2019-03-18 | The protection construction method of concrete column reinforcing bar head |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127271A (en) * | 2010-12-24 | 2011-07-20 | 大连工业大学 | Water-based epoxy modified phosphorus-containing styrene-acrylic antirust emulsion and synthesis method thereof |
| CN102167947A (en) * | 2010-11-26 | 2011-08-31 | 湖南晟通科技集团有限公司 | Waterborne anticorrosive primer acrylic resin composition and preparation method thereof |
| CN205100576U (en) * | 2015-11-05 | 2016-03-23 | 国家电网公司 | Rust -resistant protective sheath in novel steel bar end of circulated use |
| CN206174490U (en) * | 2016-11-18 | 2017-05-17 | 青岛东捷建设工程有限公司 | First rust -resistant protection device of reinforcing bar straight thread silk |
| CN207526148U (en) * | 2017-12-05 | 2018-06-22 | 廖世倍 | A kind of pre-buried exposed steel bar Rustproofing apparatus of architectural engineering |
-
2019
- 2019-03-18 CN CN201910203235.3A patent/CN109881903A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167947A (en) * | 2010-11-26 | 2011-08-31 | 湖南晟通科技集团有限公司 | Waterborne anticorrosive primer acrylic resin composition and preparation method thereof |
| CN102127271A (en) * | 2010-12-24 | 2011-07-20 | 大连工业大学 | Water-based epoxy modified phosphorus-containing styrene-acrylic antirust emulsion and synthesis method thereof |
| CN205100576U (en) * | 2015-11-05 | 2016-03-23 | 国家电网公司 | Rust -resistant protective sheath in novel steel bar end of circulated use |
| CN206174490U (en) * | 2016-11-18 | 2017-05-17 | 青岛东捷建设工程有限公司 | First rust -resistant protection device of reinforcing bar straight thread silk |
| CN207526148U (en) * | 2017-12-05 | 2018-06-22 | 廖世倍 | A kind of pre-buried exposed steel bar Rustproofing apparatus of architectural engineering |
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Application publication date: 20190614 |