CN102167537B - Reinforced concrete antirust agent with sulfate corrosion resistant function - Google Patents
Reinforced concrete antirust agent with sulfate corrosion resistant function Download PDFInfo
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- CN102167537B CN102167537B CN 201110029460 CN201110029460A CN102167537B CN 102167537 B CN102167537 B CN 102167537B CN 201110029460 CN201110029460 CN 201110029460 CN 201110029460 A CN201110029460 A CN 201110029460A CN 102167537 B CN102167537 B CN 102167537B
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- reinforced concrete
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- sulfate
- antirust
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Abstract
The invention discloses a reinforced concrete antirust agent with sulfate corrosion resistant function. The reinforced concrete antirust agent is prepared from the following raw materials in percentage by mass: 40 to 70 percent of expanding agent, 2.0 to 10.0 percent of metasilicate, 0.05 to 1.0 percent of hydroxyl hydroxy-acid salt, 0 to 2.5 percent of benzoate, 0 to 2.5 percent of lignosulfonate and 20 to 50 percent of mineral admixture. The reinforced concrete antirust agent can improve the compactness of concrete, has certain expandability, can obviously relieve damage of chloride ions to a passive film of a steel bar and improve the capacity of concrete of resisting sulfate corrosion, is suitable for reinforced concrete structures corroded by chloride ions and sulfates in salt lake and saline-alkali areas, marine environment and the like, and can prolong the service life of the concrete structures.
Description
Technical field
The invention belongs to the concrete additives in building materials field.Be specifically related to a kind of antirust for reinforced concrete with sulfate-resistant corrosion function.
Background technology
Be in the skeleton construction in salt lake, saline and alkaline area and the ocean environment, under the acting in conjunction of cl ions and vitriol, cause concrete swelling cracking, steel bar corrosion, skeleton construction has been caused huge destruction.Therefore, develop and a kind ofly can delay the concrete admixture that steel bar corrosion can improve concrete sulfate-resistant corrosion ability again, improve the weather resistance of skeleton construction, prolong its work-ing life, significant.
At present, to cl ions and the sulphate attack hazardness to skeleton construction, the technical measures of taking mainly contain: reduce water-cement ratio; Adding Mineral Admixtures; The concrete surface coating protection; Add chemical admixture etc.Reduce the density that modes such as water-cement ratio, Adding Mineral Admixtures can improve inside concrete, thereby reduce the velocity of diffusion of harmful ion at inside concrete; The concrete surface coating, the harmful ion that mainly plays in the blocking-up environment infiltrates the effect in the concrete, but coating problems such as existence is bad with the cohesiveness of concrete substrate usually, the easy ageing cracking peels off; In the concrete mixing process, add a small amount of chemical admixture such as rust inhibitor, corrosion-resistant agent etc., wait and stop reinforcement corrosion through influencing the interfacial electrochemistry reaction, this measure is simple and easy to do.
Summary of the invention
Technical problem:The present invention proposes and a kind ofly can significantly alleviate brokenization of cl ions, can improve the concrete steel bar rust inhibitor of concrete sulfate-resistant corrosion ability again rebar passivation film.
Technical scheme:Antirust for reinforced concrete with sulfate-resistant corrosion function of the present invention comprises the raw material of following mass percent:
Swelling agent 40% ~ 70%
Metasilicate 2.0% ~ 10.0%
Mineral admixture 20% ~ 50%
Hydroxyl hydroxy acid salt 0.05% ~ 1.0%.
This rust inhibitor comprises that also mass percent is respectively less than 2.5% benzoate and/or sulfonated lignin.
Swelling agent is the mixture or the calcium sulphoaluminate-calcium oxide expansion agents of calcium sulphoaluminate-calcium oxide expansion agents and calcium sulphoaluminate class swelling agent.
Metasilicate is one or more compositions in Starso, lithium metasilicate, the potassium metasilicate.
Hydroxyl hydroxy acid salt is one or more compositions in Zinc Gluconate, maltonic acid sodium, the Potassium Gluconate.
Benzoate is one or both compositions in benzic acid sodium, the ammonium benzoate.
Sulfonated lignin are one or both compositions in calcium lignin sulphonate, the sodium lignosulfonate.
Mineral admixture is one or both compositions in ground slag, the silica flour.
Beneficial effect:Early expansion performance of the present invention is good, do not contain nitrite; Performance satisfies the related request among standard " antirust for reinforced concrete " (JT/T 537-2004), " the sulfuric-resisting salt corrodes sanitas " (the JC/T 1011-2006) simultaneously, has improved anti-vitriol of concrete and cl ions erosive ability.
Embodiment
Antirust for reinforced concrete with sulfate-resistant corrosion function of the present invention, it is made up of the raw material of following mass percent:
Swelling agent 40% ~ 70%
Metasilicate 2.0% ~ 10.0%
Hydroxyl hydroxy acid salt 0.05% ~ 1.0%
Mineral admixture 20% ~ 50%
Or comprise:
Benzoate 0% ~ 2.5%
Sulfonated lignin 0% ~ 2.5%
The said components synergy, its mechanism of action is following:
Swelling agent can generate ettringite in cement hydration process, produce microdilatancy, reduces the concrete pore rate; Improve the concrete hole structure; Improve concrete density, reduce concrete water-permeable, thereby improve the ability of concrete resisting chloride ion penetration and sulphate attack; The glucono-radical ion through with cl ions in the rebar surface competitive adsorption, finally be used in rebar surface and form the fine and close adsorption film of one deck reinforcing bar is played a protective role through the huge legendary turtle cooperation; Metasilicate is all precipitable in cathodic area and positive column, can hinder the dissolving of anode metal, can hinder oxygen again near negative electrode generation reduction reaction; Benzoate can form one deck compact protective film in the positive column, very big restraining effect is played in the corrosion of reinforcing bar.Therefore, the present invention can be alleviated brokenization of cl ions to rebar passivation film effectively, can improve concrete sulfate-resistant corrosion ability again.
Below in conjunction with embodiment process of the present invention and effect are further specified.
Embodiment 1: a kind of antirust for reinforced concrete with sulfate-resistant corrosion function, the weight percent of each moity is: calcium sulphoaluminate-calcium oxide expansion agents 45%, calcium sulphoaluminate class swelling agent 15%, Starso 6.0%, maltonic acid sodium 0.45%, ground slag 33.55%.
Embodiment 2: a kind of antirust for reinforced concrete with sulfate-resistant corrosion function, the weight percent of each moity is: calcium sulphoaluminate-calcium oxide expansion agents 40%, Starso 6.0%, maltonic acid sodium 0.45%, ground slag 53.55%.
Embodiment 3: a kind of antirust for reinforced concrete with sulfate-resistant corrosion function, the weight percent of each moity is: calcium sulphoaluminate-calcium oxide expansion agents 50%, Starso 5.0%, maltonic acid sodium 0.3%, Sodium Benzoate 1.0%, calcium lignin sulphonate 2.0%, ground slag 41.7%.
Embodiment 4: a kind of antirust for reinforced concrete with sulfate-resistant corrosion function, the weight percent of each moity is: calcium sulphoaluminate-calcium oxide expansion agents 50%, calcium sulphoaluminate class swelling agent 20%, Starso 5.0%, maltonic acid sodium 0.15%, calcium lignin sulphonate 2.5%, silica flour 22.35%.
Test subject and method are carried out with reference to " antirust for reinforced concrete " (JT/T 537-2004) and " the sulfuric-resisting salt corrodes sanitas " (JC/T 1011-2006), and the rust inhibitor volume is 12%.Reinforced steel bar rust preventing property and concrete performance influence test-results and see table 1; Sulphate-corrosion resistance can test result be seen table 2.
Table 1 reinforced steel bar rust preventing property and concrete performance influence test-results
Table 2 sulphate-corrosion resistance can test result
Can know that by table 1 reinforced steel bar rust preventing property of the present invention and concrete performance influence the related request in the test-results meet the specifications " antirust for reinforced concrete " (JT/T 537-2004).
Simultaneously, can be known by table 2 that the present invention is excellent in sulfate-resistant corrosion ability to performance, each item index all satisfies the related request of standard " concrete sulfuric-resisting salt corrodes sanitas " in (JC/T1011-2006).
Claims (4)
1. antirust for reinforced concrete with sulfate-resistant corrosion function is characterized in that this rust inhibitor comprises the raw material of following mass percent:
Swelling agent 40% ~ 70%
Metasilicate 2.0% ~ 10.0%
Mineral admixture 20% ~ 50%
Hydroxyl hydroxy acid salt 0.05% ~ 1.0%;
Wherein, swelling agent is the mixture or the calcium sulphoaluminate-calcium oxide expansion agents of calcium sulphoaluminate-calcium oxide expansion agents and calcium sulphoaluminate class swelling agent;
Metasilicate is one or more compositions in Starso, lithium metasilicate, the potassium metasilicate;
Hydroxyl hydroxy acid salt is one or more compositions in Zinc Gluconate, maltonic acid sodium, the Potassium Gluconate;
Mineral admixture is one or both compositions in ground slag, the silica flour.
2. the antirust for reinforced concrete with sulfate-resistant corrosion function as claimed in claim 1 is characterized in that this rust inhibitor comprises that also mass percent is respectively less than 2.5% benzoate and/or sulfonated lignin.
3. the antirust for reinforced concrete with sulfate-resistant corrosion function as claimed in claim 2 is characterized in that benzoate is one or both compositions in Sodium Benzoate, the ammonium benzoate.
4. the antirust for reinforced concrete with sulfate-resistant corrosion function as claimed in claim 2 is characterized in that sulfonated lignin are one or both compositions in calcium lignin sulphonate, the sodium lignosulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029460 CN102167537B (en) | 2011-01-27 | 2011-01-27 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029460 CN102167537B (en) | 2011-01-27 | 2011-01-27 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
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| Publication Number | Publication Date |
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| CN102167537A CN102167537A (en) | 2011-08-31 |
| CN102167537B true CN102167537B (en) | 2012-09-19 |
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| CN 201110029460 Active CN102167537B (en) | 2011-01-27 | 2011-01-27 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863174A (en) * | 2012-09-08 | 2013-01-09 | 王桂明 | Cement concrete corrosion inhibitor |
| CN103172292B (en) * | 2013-02-25 | 2014-12-24 | 洛阳理工学院 | Composite steel bar rust inhibitor |
| CN103172290B (en) * | 2013-02-25 | 2014-11-26 | 洛阳理工学院 | Environment-friendly reinforcing bar corrosion inhibitor |
| CN103979821B (en) * | 2014-06-03 | 2017-01-25 | 青岛理工大学 | Steel bar corrosion inhibitor |
| CN105130239A (en) * | 2015-07-08 | 2015-12-09 | 常州大学 | Concrete antiseptic |
| CN105152559A (en) * | 2015-11-01 | 2015-12-16 | 刘应才 | Method for preparing corrosion inhibitor for reinforced concrete |
| CN108751780A (en) * | 2018-06-08 | 2018-11-06 | 宁波蒙曼生物科技有限公司 | A kind of environmental protection antirust for reinforced concrete and its preparation and application |
| CN109161900B (en) * | 2018-10-16 | 2021-04-13 | 安阳师范学院 | Environment-friendly high-performance graphene-based rust inhibitor and preparation method and application thereof |
| CN112390565A (en) * | 2020-12-02 | 2021-02-23 | 句容市星辰新型材料有限公司 | Concrete expanding agent and preparation method thereof |
| CN112811844B (en) * | 2021-01-19 | 2022-03-08 | 浙江大学 | Nano composite migration type steel bar corrosion inhibitor suitable for concrete in marine environment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3635254A1 (en) * | 1986-10-16 | 1988-04-28 | Hans Jaklin | METHOD FOR PREVENTING CORROSION OF STEEL CONSTRUCTIONS OR STEEL ARMORING OF CONSTRUCTIONS |
| DD275157A3 (en) * | 1987-12-16 | 1990-01-17 | Bauakademie Ddr | Process for the preparation of a corrosion inhibitor for steel reinforcements based on aqueous dispersions |
| CN1718863A (en) * | 2005-04-26 | 2006-01-11 | 中国海洋大学 | Film green corrosion inhibitor for inhibiting corrosion of carbon steel in sea water |
| 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 |
| CN101407385B (en) * | 2008-11-04 | 2011-03-30 | 南京瑞迪高新技术公司 | Alkali-free non-nitrite concrete reinforcement antirust |
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