CN102320771B - Reinforced concrete rust inhibitor - Google Patents
Reinforced concrete rust inhibitor Download PDFInfo
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- CN102320771B CN102320771B CN 201010245075 CN201010245075A CN102320771B CN 102320771 B CN102320771 B CN 102320771B CN 201010245075 CN201010245075 CN 201010245075 CN 201010245075 A CN201010245075 A CN 201010245075A CN 102320771 B CN102320771 B CN 102320771B
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Abstract
The invention discloses a reinforced concrete rust inhibitor, and relates to the technical field of building materials. The reinforced concrete rust inhibitor consists of the following components in percentage by weight: 10.0 to 15.0 percent of nitrite, 0.1 to 1.0 percent of sodium hexametaphosphate, 0.5 to 1.0 percent of diethylenetriamine, 0.8 to 1.5 percent of thiourea, 0.5 to 1.0 percent of sodium benzoate, 1.0 to 1.5 percent of naphthamine, 3.0 to 5.0 percent of triethanolamine, 5.0 to 1.0 percent of water reducing agent, 0.001 to 0.005 percent of air entraining agent, and the balance of water. The reinforced concrete rust inhibitor has the advantages of low consumption, capability of reducing the consumption of a single rust inhibitor and the like, and can be widely applied to fresh reinforced concrete structures of projects of harbors, railways, coastal buildings, civil buildings and the like. The durability and the comprehensive corrosion resistance of concrete can be promoted, the service life of a building is remarkably prolonged, and remarkable economic benefit and social benefit can be brought.
Description
Technical field
The invention belongs to building material technical field, relate in particular to a kind of rust inhibitor for Steel Concrete.
Background technology
Steel bar corrosion has become the principal element that the world today affects concrete durability.The financial loss that steel bar corrosion causes is very huge, the U.S. is annual to reach 1,500 hundred million dollars because Infrastructure is the year financial loss that main steel bar corrosion destruction is caused, the reparation expense of the annual Infrastructure of Britain is 5,500,000,000 pounds, the year corrosion loss of Australia is 25,000,000,000 dollars, and to specialize major portion be that reinforcement corrosion causes.In China, " the extra large sand room " phenomenon that the coastland occurs and northern area are because the steel bar corrosion problem that causes in road and bridge spraying deicer salts also is very serious.Steel bar anti-corrosion erosion problem in the skeleton construction more and more causes the extensive concern of industry, and especially great basic engineering more should be taked necessary steel bar anti-corrosion measure, guarantees the weather resistance of structure.
Generally speaking, the high alkalinity hole solution of Steel Concrete makes rebar surface generate one deck passive film densification, that have good corrosion resistance.But work as corrosive medium (such as Cl
-And CO
2) when entering into reinforcing bar/concrete interface, cause that hole solution around the reinforcing bar forms and the variation of character, destroyed the passive film of rebar surface, will cause steel bar corrosion.Because the large 2-4 of iron rust volume ratio iron itself doubly, the bulging force of generation causes concrete layer to form the crack and peel off along the reinforcing bar of corrosion up to 30MPa, finally makes skeleton construction lose its due supporting capacity, damages.
The safeguard procedures of steel bar corrosion are a lot; but on the basis of improving concrete density; mix reinforcing steel bar corrosion inhibitor and be and improve one of effective means of reinforcement in concrete protective value, and U.S.'s " life-cycle " shows that the treatment process that adopts reinforcing steel bar corrosion inhibitor has the economical effectiveness of optimum.Therefore, the Research And Engineering of reinforcing steel bar corrosion inhibitor is used, and has obtained very rapidly development, and many inorganic, organic compound are used as rust inhibitor, such as calcium nitrite, just are considered to hinder the best a kind of rust inhibitor of rust effect.But the nitrites rust inhibitor belongs to the Anodic Type rust inhibitor, and the shortcoming of this type of rust inhibitor is can produce local corrosion and accelerated corrosion when with quantity not sufficient, thereby is known as " danger " rust inhibitor; In addition, add nitrite so that degradation under the flowability of fresh concrete.Therefore to unite use with the resistance rust composition of other kinds, to overcome these shortcomings.
Domestic also some people has proposed the antirust for reinforced concrete of different ingredients: such as publication number: CN101407385A, name is called: a kind of alkali-free non-nitrite concrete reinforcement antirust; Its moiety of the rust inhibitor of this disclosure of the Invention (by weight percentage) Zinc Gluconate 3%-10%, lithium silicate 20%-40%, ammonium benzoate 10%-20%, lower molecular weight (alcohol) amine 15%-25%, water 20%-40%.Its mechanism of action is: silicate and glucose acid group have suppressed the dissolving of anode at the deposited film of positive column and anode dissolution product formation difficulty soluble salt and huge legendary turtle compound; The product effect of zine ion and cathodic reaction generates the zinc hydroxide of indissoluble, and they deposit at cathode zone, have reduced the speed of response of cathodic process; Be adsorbed on rebar surface by the larger nitrogen of electronegativity, the polar group centered by the Sauerstoffatom in lower molecular weight (alcohol) amine, changed the double electrical layers of reinforcing bar in concrete, thereby play a part to suppress reinforcement corrosion.This invention has adopted organic and inorganic multiple material to unite use, has good anticorrosion performance, but fails to consider to improve concrete other performances from concrete corrosion resistant agent itself, such as density, impermeability etc.When unreasonable such as mix Design, might aggravate the generation of corrosion.So both had an anticorrosion performance in the urgent need to a kind of at present, and can suitably improve again the high performance steel concrete corrosion resistant agent of other performances of concrete.
Summary of the invention
The object of the invention is to solve above-described technical problem, a kind of antirust for reinforced concrete is provided, its technical scheme is as follows:
A kind of antirust for reinforced concrete is comprised of following component and weight percent:
Nitrite: 10.0～15.0%, Sodium hexametaphosphate 99: 0.1～1.0%,
Diethylenetriamine: 0.5～1.0%, thiocarbamide: 0.8～1.5%,
Sodium Benzoate: 0.5～1.0%, urotropine: 1.0～1.5%,
Trolamine: 3.0～5.0%, water reducer: 5.0～10.0%,
Air entrapment agent: 0.001～0.005%, all the other are water.
Wherein said nitrite is calcium nitrite or Sodium Nitrite.
Wherein said water reducer is any one in poly carboxylic acid, naphthene sulfonic acid, the sulfamate.
Wherein said air entrapment agent is alkylbenzene sulfonate or three-iron saponin class.
Rust inhibitor of the present invention forms as dispersion medium is composite take water take multiple organic and inorganic thing as synthetic base-material.Wherein, calcium nitrite and Sodium Benzoate are as Anodic Type resistance rust composition, Sodium hexametaphosphate 99 is as cathode type resistance rust composition, urotropine, diethylenetriamine and thiocarbamide are as mixed type resistance rust composition, high-performance water reducing agent is as the main component that improves fresh concrete flowability and concrete density, and air entrapment agent grades as the one-tenth that improves Pore Structure of Concrete.
Mix in the Steel Concrete of rust inhibitor of the present invention, high-performance water reducing agent has reduced water cement ratio, has reduced the ratio of free water in the concrete, has improved concrete density, air entrapment agent has improved the pore structure in the concrete, makes extraneous corrosive medium be difficult for invading inside concrete; The resistance rust such as calcium nitrite composition promotes rebar surface to generate γ-FeOOH protective membrane, and the resistances such as diethylenetriamine and thiocarbamide are become rusty into branch and are adsorbed in the rebar surface that passive film and passive film do not cover, and guarantee compactness and the thickness of rebar surface passive film.
The preparation method of this patent is as follows:
1. get Sodium hexametaphosphate 99 and be added to the water abundant dissolving, add nitrite again and fully dissolve, obtain between faint yellow transparence and the pH value 7-9, liquid is stand-by.
2. in mentioned solution, add successively diethylenetriamine, thiocarbamide, urotropine, Sodium Benzoate, fully stir, mix, obtain between faint yellow transparence and the pH value 8-9.
3. in above solution, add trolamine, high-performance water reducing agent and air entrapment agent, and rapid stirring, it is faint yellow to auburn the finished product making color, color is different and different with the high-performance water reducing agent of selecting.
The present invention is in conjunction with existing technology, draws in the past useful experience, proposed a kind ofly can effectively stop or delay steel bar corrosion, and can suitably improve the high performance steel concrete corrosion resistant agent of concrete performance.Resistance in this high performance steel concrete corrosion resistant agent is become rusty into and is adhered to mixed type separately, cathodic reaction, anodic reaction to corrosion process all have significant polarized action, can significantly improve the pitting potential of reinforcing bar, thereby can increase substantially the criticality chlorine ion concentration of removing blunt of reinforcing steel bar, thereby promote the comprehensive erosion-resisting ability of concrete endurance quality and concrete, the working life of significant prolongation buildings, can bring significant economic benefit, social benefit.
Rust inhibitor of the present invention and cement adaptability are good, can suitably improve concrete performance, the infiltration of slowing down corrosion medium in the concrete, corrosive medium and oxygen in the isolated concrete hole solution enter reinforcing bar inside, galvanic corrosion can not be carried out, thereby stoped the action of rust of reinforcing bar.It is few that the present invention has a consumption, reduces the advantages such as single rust inhibitor consumption, is a kind of high-property concrete reinforcing bar rust inhibitor, can be widely used in newly mixing in the skeleton construction of the engineerings such as harbour, railway, coastal building, covil construction.
Embodiment
The present invention is further described below in conjunction with the drawings and specific embodiments.
Embodiment 1: it is as follows to choose each raw material of weight percent:
Calcium nitrite: 10.0%,
Sodium hexametaphosphate 99: 0.5%,
Diethylenetriamine: 0.5%,
Thiocarbamide: 0.8%,
Sodium Benzoate: 0.6%
Urotropine: 1.0%,
Trolamine: 5.0%
High-performance water reducing agent: 5.0%,
Air entrapment agent: 0.03 ‰,
All the other are water.
Embodiment 2: it is as follows to choose each raw material of weight percent:
Sodium Nitrite: 11.0%,
Sodium hexametaphosphate 99: 0.5%,
Diethylenetriamine: 0.6%,
Thiocarbamide: 1.2%,
Sodium Benzoate: 0.5%,
Urotropine: 1.0%,
Trolamine: 5.0%,
High-performance water reducing agent: 10.0%,
Air entrapment agent: 0.03 ‰,
All the other are water.
Embodiment 3: it is as follows to choose each raw material of weight percent:
Sodium Nitrite: 10.0%,
Sodium hexametaphosphate 99: 0.5%,
Diethylenetriamine: 0.5%,
Thiocarbamide: 0.8%,
Sodium Benzoate: 0.8%,
Urotropine: 1.0%,
Trolamine: 5.0%,
High-performance water reducing agent: 10.0%,
Air entrapment agent: 0.03 ‰,
All the other are water.
Claims (2)
1. antirust for reinforced concrete is comprised of following component and weight percent:
Nitrite: 10.0%～15.0%, Sodium hexametaphosphate 99: 0.1%～1.0%,
Diethylenetriamine: 0.5%～1.0%, thiocarbamide: 0.8%～1.5%,
Sodium Benzoate: 0.5%～1.0%, urotropine: 1.0%～1.5%,
Trolamine: 3.0%～5.0%, water reducer: 5.0%～10.0%,
Air entrapment agent: 0.001%～0.005%, all the other are water.
2. antirust for reinforced concrete as claimed in claim 1, it is characterized in that: described nitrite is calcium nitrite or Sodium Nitrite.
3. antirust for reinforced concrete as claimed in claim 1, it is characterized in that: described water reducer is any one in poly carboxylic acid, naphthene sulfonic acid, the sulfamate.
4. antirust for reinforced concrete as claimed in claim 1, it is characterized in that: described air entrapment agent is alkylbenzene sulfonate or triterpenoid saponin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245075 CN102320771B (en) | 2010-08-04 | 2010-08-04 | Reinforced concrete rust inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010245075 CN102320771B (en) | 2010-08-04 | 2010-08-04 | Reinforced concrete rust inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102320771A CN102320771A (en) | 2012-01-18 |
| CN102320771B true CN102320771B (en) | 2013-01-23 |
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| CN 201010245075 Active CN102320771B (en) | 2010-08-04 | 2010-08-04 | Reinforced concrete rust inhibitor |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743953B (en) * | 2015-03-04 | 2017-01-18 | 洛阳理工学院 | Low-cost rebar corrosion inhibitor |
| CN105236792A (en) * | 2015-08-25 | 2016-01-13 | 宁波大学 | Composite reinforcement rust-resistant agent and application thereof |
| CN105884237A (en) * | 2016-05-12 | 2016-08-24 | 陆静 | Concrete rust inhibitor |
| CN107352830A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of resistance rust composition and environment-friendly type corrosion inhibitor, the preparation method and application of environment-friendly type corrosion inhibitor |
| CN107352826A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of reinforcing bar resistance rust composition, reinforcing steel bar corrosion inhibitor and its preparation method and application |
| CN107500601B (en) * | 2017-08-29 | 2019-11-12 | 启东海中港建材有限公司 | A kind of concrete corrosion resistant agent and the ready-mixed concrete using this corrosion inhibitor |
| CN110922083A (en) * | 2019-12-09 | 2020-03-27 | 庄明磊 | Rust inhibitor for reinforced concrete and preparation method thereof |
| CN111470797B (en) * | 2020-04-10 | 2022-04-19 | 广西科达建材化工有限公司 | Concrete corrosion inhibitor |
| CN111875304A (en) * | 2020-07-30 | 2020-11-03 | 重庆众通南一混凝土有限公司 | High-insulativity concrete |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340438B1 (en) * | 1999-04-19 | 2002-01-22 | Tomahawk, Inc. | Corrosion inhibiting admixture for concrete |
| CN101007717A (en) * | 2007-01-25 | 2007-08-01 | 上海市建筑科学研究院(集团)有限公司 | Reinforced concrete anti-rusting agent |
| CN101269932A (en) * | 2008-05-12 | 2008-09-24 | 北京东方建宇混凝土科学技术研究院有限公司 | Water-proof corrosion inhibitor and preparation method thereof |
-
2010
- 2010-08-04 CN CN 201010245075 patent/CN102320771B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340438B1 (en) * | 1999-04-19 | 2002-01-22 | Tomahawk, Inc. | Corrosion inhibiting admixture for concrete |
| CN101007717A (en) * | 2007-01-25 | 2007-08-01 | 上海市建筑科学研究院(集团)有限公司 | Reinforced concrete anti-rusting agent |
| CN101269932A (en) * | 2008-05-12 | 2008-09-24 | 北京东方建宇混凝土科学技术研究院有限公司 | Water-proof corrosion inhibitor and preparation method thereof |
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Address after: Five Zhejiang province Deqing County town Longqiao 313201 Applicant after: Zhejiang Wulong New Materials Co., Ltd. Address before: Five Zhejiang province Deqing County town Longqiao 313201 Applicant before: Zhejiang Wulong Chemical Co., Ltd. |
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