CN105084935B - Nitrite solution hinders rust method in reinforced concrete surface brushing - Google Patents
Nitrite solution hinders rust method in reinforced concrete surface brushing Download PDFInfo
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- CN105084935B CN105084935B CN201510526332.8A CN201510526332A CN105084935B CN 105084935 B CN105084935 B CN 105084935B CN 201510526332 A CN201510526332 A CN 201510526332A CN 105084935 B CN105084935 B CN 105084935B
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Abstract
The invention discloses nitrite solution rust method is hindered in reinforced concrete surface brushing, feature is first to find out rusty part, and the surface to rusty part carries out frosted treatment, then frosting is moistened with nitrite saturated aqueous solution, frosting is set to form water membrane, then covering suctions the sponge of nitrite saturated aqueous solution on frosting, then waterproof felt-cloth is covered on sponge, and the edge of waterproof felt-cloth is fixed with the face seal of reinforced concrete structure, it is last that weight is pressed on waterproof felt-cloth, make the thickness of sponge by compression more than 1/3, kept for 2~3 weeks；Advantage is the method easy to operate effectively, seepage velocity of the nitrite solution in concrete can be accelerated, make it suitable as and the surface of reinforced concrete structure is coated in outside osmosis type corrosion inhibitor uses, it is particularly suitable for the large area antirust reparation to reinforced concrete structure, and to the structural behaviour of concrete body without obvious negative effect.
Description
Technical field
The present invention relates to the resistance rust method of reinforced concrete structure in building field, more particularly to a kind of nitrite solution
Rust method is hindered in reinforced concrete surface brushing.
Background technology
Nitrite has good inhibition of corrosion as the reinforcing steel bar corrosion inhibitor in reinforced concrete structure, it anti-
Rust/resistance rust effect be decided by Chloride Ion in Concrete and nitrite ion mole the ratio between.Chloride content is bigger, suppresses reinforcing bar
NO needed for corrosion2 -/ CI-Mole the ratio between it is bigger.China《Technical code for application of admixture in concrete》Regulation：Villaumite resistance rust class is mixed
Solidifying soil antifreezing agent, when villaumite volume for cement weight 0.5%~1.5%, the ratio between natrium nitrosum and villaumite should be greater than 1；And work as
When villaumite volume is the 1.5%~3% of cement weight, the ratio between natrium nitrosum and villaumite should be greater than 1.3%, but this anticorrosive measure
Premise be：Nitrite mixed in advance during concrete batching in concrete, make to form uniform nitrite anions around reinforcing bar
Anticorrosion environment, therefore be applied in engineering as internal doping type corrosion inhibitor more than nitrite.And because nitrite is in concrete
The Retarder theory of middle naturally osmotic, it is less as the application that osmosis type corrosion inhibitor is applied to reinforced concrete structure surface.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of infiltration for accelerating nitrite solution in concrete
Speed, the nitrite solution for using is repaired in reinforced concrete surface brushing resistance rust method to be suitable as outer painting.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：Nitrite solution is in reinforced concrete surface
Brush resistance rust method, including step in detail below：
（1）, with steel bar corrosion instrument reinforced concrete structure is tested, find out rusty part；
（2）, frosted treatment is carried out to the surface of rusty part, make nitrite saturated aqueous solution be easier to penetrate into reinforcing bar
The inside of concrete structure, frosted area is made a living rust 1.2~1.5 times of site area, and frosting is completely covered rusty part；
（3）, nitrite is deployed into nitrite saturated aqueous solution；
（4）, with nitrite saturated aqueous solution moisten frosting, make frosting formed water membrane；
（5）, on frosting covering suction the sponge of nitrite saturated aqueous solution, waterproof felt-cloth is then covered in sea
On silk floss, and the edge of waterproof felt-cloth is fixed with the face seal of reinforced concrete structure, finally pressed on waterproof felt-cloth
Upper weight, makes the thickness of sponge by compression more than 1/3, is kept for 2~3 weeks；Extruding by weight to sponge forms low water
Pressure, to accelerate seepage velocity of the nitrite saturated aqueous solution in concrete, and the sealing of the cladding of waterproof felt-cloth is both low water
Pressure is able to the premise to be formed, and also prevent slime flux water clock of the nitrite saturated aqueous solution on reinforced concrete structure surface.
The edge structural construction AB glue sealings of described waterproof felt-cloth are fixed on the surface of reinforced concrete structure
On.
Compared with prior art, it is an advantage of the invention that the method is easy to operate effectively, nitrite solution can be accelerated and is existed
Seepage velocity in concrete is used so as to fit as the surface that reinforced concrete structure is coated in outside osmosis type corrosion inhibitor, special
The large area antirust of reinforced concrete structure Shi He not repaired, and to the structural behaviour of concrete body without obvious negatively shadow
Ring；Additionally, before covering the sponge for suctioning nitrite saturated aqueous solution on frosting, first using nitrite saturated aqueous solution
Moistening frosting, is conducive to contact of the sponge nitrite saturated aqueous solution with concrete to permeate.
Brief description of the drawings
Fig. 1 be the present invention in checking test to the comparison diagram of different time inner concrete Nitrite mass concentration.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Nitrite solution hinders rust method, including step in detail below in reinforced concrete surface brushing：
（1）, with steel bar corrosion instrument reinforced concrete structure is tested, find out rusty part；
（2）, carry out frosted treatment to the surface of rusty part, frosted area is made a living 1.2~1.5 times of rust site area,
And frosting is completely covered rusty part；
（3）, nitrite is deployed into nitrite saturated aqueous solution；
（4）, with nitrite saturated aqueous solution moisten frosting, make frosting formed water membrane；
（5）, on frosting covering suction the sponge of nitrite saturated aqueous solution, waterproof felt-cloth is then covered in sea
On silk floss, and the edge structural construction AB glue sealings of waterproof felt-cloth are fixed on the surface of reinforced concrete structure, most
The weight in pressure on waterproof felt-cloth, makes the thickness of sponge by compression more than 1/3 afterwards, is kept for 2~3 weeks.
Carrying out tests below to the above method proves：
According to national current standard《Concrete admixture》GB8076 and《Common concrete proportioning code》JGJ55 specifies
Match ratio make shaping concrete test block, size be 500mm × 500mm × 150mm, standard curing 28 days, to prevent nitrous
The loss of hydrochlorate saturated aqueous solution, epoxy resin is smeared in four sides of concrete test block, and the bottom surface of concrete test block is made
For the painting of nitrite saturated aqueous solution is wiped one's face（500mm×500mm）, first painting is wiped one's face before brushing carry out sand paper frosted treatment,
Frosting is moistened with nitrite saturated aqueous solution again, afterwards in the sea for applying overlying lid of wiping one's face and suctioning nitrite saturated aqueous solution
Silk floss, and waterproof felt-cloth is covered on sponge and fixation is sealed, finally weight makes to form low water therebetween in pressure on waterproof felt-cloth
Pressure, continues to conserve in 20 DEG C, the fog room of relative humidity 60%, and the nitrite anions concentration for determining infiltration is used.
Nitrite anions concentration mensuration：Osmotic concentration to nitrite anions in concrete was every one month, three months, six
Month, determine once within 12 months, take Φ 100mrn × 60mm concrete cores with rig during measure, and from surface internally direction
With 10mm intervals cut-out core, used for determining nitrite anions mass concentration, the measure of nitrite anions mass concentration is according to JCI-
SC regulation carry out, take levigate 2g samples and sieve with 80 mesh sieve, then in 50 DEG C of warm water extraction solubility nitrite anions from
Son, is measured with ion chromatograph after filtering.It will be seen from figure 1 that by this method in concrete surface brushing nitrous
Hydrochlorate saturated aqueous solution can make rebar surface with nitrite anions mass concentration higher, and keep certain hour, so that effectively
Ground protection reinforcing bar.
Claims (2)
1. nitrite solution hinders rust method, including step in detail below in reinforced concrete surface brushing：
(1) reinforced concrete structure is tested with steel bar corrosion instrument, rusty part is found out；
(2) frosted treatment, is carried out to the surface of rusty part, frosted area is made a living 1.2~1.5 times of rust site area, and mill
Sand face is completely covered rusty part；
(3) nitrite, is deployed into nitrite saturated aqueous solution；
(4) frosting, is moistened with nitrite saturated aqueous solution, frosting is formed water membrane；
It is characterized in that：
(5), covering suctions the sponge of nitrite saturated aqueous solution on frosting, and waterproof felt-cloth then is covered in into sponge
On, and the edge of waterproof felt-cloth is fixed with the face seal of reinforced concrete structure, finally in pressure on waterproof felt-cloth
Weight, makes the thickness of sponge by compression more than 1/3, is kept for 2~3 weeks.
2. nitrite solution as claimed in claim 1 hinders rust method in reinforced concrete surface brushing, it is characterised in that institute
The edge structural construction AB glue sealings of the waterproof felt-cloth stated are fixed on the surface of reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510526332.8A CN105084935B (en) | 2015-08-25 | 2015-08-25 | Nitrite solution hinders rust method in reinforced concrete surface brushing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510526332.8A CN105084935B (en) | 2015-08-25 | 2015-08-25 | Nitrite solution hinders rust method in reinforced concrete surface brushing |
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| Publication Number | Publication Date |
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| CN105084935A CN105084935A (en) | 2015-11-25 |
| CN105084935B true CN105084935B (en) | 2017-05-31 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60231478A (en) * | 1984-04-27 | 1985-11-18 | 株式会社小野田 | Rust prevention for steel material in inorganic material |
| US5422141A (en) * | 1993-03-12 | 1995-06-06 | W. R. Grace & Co.-Conn. | Corrosion inhibiting composition for reinforced concrete and method of applying same |
| US5634966A (en) * | 1995-07-19 | 1997-06-03 | W.R. Grace & Co.-Conn. | Nitrite-based corrosion inhibitors with improved anodic and cathodic inhibiting performance |
| CN102199012A (en) * | 2010-03-23 | 2011-09-28 | 北京新桥技术发展有限公司 | Self-migration rust inhibitor and its preparation method |
| CN103739229B (en) * | 2013-11-25 | 2015-05-13 | 国家电网公司 | Migrating rust inhibitor |
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2015
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