Steel bar, rust removal, how to settle? Under what circumstances should steel bars be rusted?

Hello, how to settle the steel bar rust depends on the specific situation of your construction site, now the construction site steel rust and rust removal is very normal, who pays according to the specific situation, steel bar rust removal ** is not the same, steel bar rust removal methods generally have steel bar rust remover, steel bar rust removal machine, waterjet rust removal, water blasting rust removal, sand blasting rust removal and other rust removal methods, mainly because of professionalism, in order to better solve the problem of steel bar rust removal. Hope to help you solve the problem, hope! Thank you!

of the construction siteRebar rust removalThe settlement method depends on how you negotiate with Party A, the steel bar is supplied by Party A, but now it is rusty, in principle, Party A should find the engineering team or find it by itselfRebar rust removerThe rust removal construction of such materials has nothing to do with you, but if Party A appoints you to do it, Party A is responsible for itRebar rust removerExpenses, you are responsible for labor costs.

The quota is applied according to the tonnage of the steel bar to be removed.

Rebar refers to steel for reinforced concrete and prestressed reinforced concrete, which has a circular cross-section and sometimes a square with rounded corners. Including round steel bars, ribbed steel bars, and torsion steel bars. The steel bar for reinforced concrete refers to the straight bar or wire strip steel used for reinforced concrete reinforcement, and its shape is divided into two types: light round steel bar and deformed steel bar, and the delivery state is straight bar and disc round.

The rust removal work has been included in the working hour quota, so it is not calculated separately, but whether the steel bar provided by Party A is qualified, Party B has the right to test and determine that those who are unqualified can refuse to use!

In the case of manual rust removal, the settlement of consumables will be added manually.

Steel bar, rust removal, how to settle?

This depends on how you negotiate, the general material cost and wages are calculated separately, the material is actually nothing, directly sprayed with steel bar rust remover, the wage can be calculated separately, the wage in each place is not the same, in principle, Party A is responsible for the rust removal, because Party A supplies, but the steel bar is rusty, and Party A needs to deal with it itself.

Summary. However, the code does not specify the extent to which the corroded steel bars cannot be used. Moreover, in the on-site construction, in most cases, it is not possible to remove the rust as long as there is rust, and the corrosion of steel bars should be treated flexibly in the on-site construction.

If there is more rust on the surface of the steel bar, and it appears in sheets, in order to ensure the grip and wrapping force of the steel bar, these steel bars need to be derusted; If there is less rust on the surface of the steel bar and it is more scattered (no spalling), rust removal can be omitted, because the scattered rust spots have little effect on the cohesion of the steel bar and concrete.

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Theoretically speaking, as long as there is rust on the surface of the steel bar, no matter how much the rust is, it should be derusted. The corrosion grade of the steel bar is as follows: 1. The surface part of the steel bar has oxidation and rust; 2. The steel surface is fully covered with oxide scale and almost no rust; 3. The surface of the steel that has been corroded and part of the oxide scale has been peeled off; 4. The oxide scale has been peeled off due to rust, which can be scraped off, and there is a small amount of pitting on the surface of the steel; 5. The oxide scale has been fully peeled off due to rust, and the surface of the steel that has been widely pitted has been traced.

However, it is not specified in the specification that the degree of rust cannot be used for the removal of steel bars. Moreover, in the on-site construction, in most cases, it is not possible to remove the rust as long as there is rust, and the corrosion of steel bars should be treated flexibly in the on-site construction. If there is more rust on the surface of the steel bar, and it appears in sheets, in order to ensure the grip and wrapping force of the steel bar, these steel bars need to be derusted; If there is less rust on the surface of the steel bar, and there is more scattered distribution of oranges (no peeling), rust removal can be carried out, because the scattered rust spots have little effect on the positive adhesion of the steel bar and concrete.

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There are two simple ways to remove rust from steel bars.

1. Chemical rust removal (steel bar rust remover).

Chemical rust removal method is a simple and fast rust removal method, direct soaking, brushing, spraying steel rust surface, after the steel bar rust remover reaction can see the metal background, there are many steel bar rust removers on the market at present, we buy at the same time, please look for the Bafang rust removal brand, steel bar rust remover does not contain strong acid, can be directly in contact with **, although this product is an environmentally friendly rust remover, non-toxic and harmless, workers try to wear masks and gloves in construction, if accidentally sprayed to the eyes and mouth, please clean up with water in time, if you feel unwell, Please seek medical attention promptly.

2. Physical rust removal.

Physical rust removal must be more or less understandable to everyone, that is, dynamic rust removal. There are many kinds of physical rust removal, including manual grinding, steel bar derusting machine, sandblasting and rust removal equipment, water sandblasting machine, waterjet rust removal, etc.

Hubei Bafang Rust Removal Technology Co., Ltd. is a high-tech enterprise focusing on R&D, manufacturing and service of steel bar derusting agent. Bafang Rust Removal has a R&D and production team of steel bar rust remover, as well as an excellent rust removal construction team, as many as 20 kinds of steel bar rust removal technology solutions, to help customers solve various rust removal and anti-corrosion problems throughout the day. Long-term in-depth cooperation with central enterprises, highly praised.

According to the actual environment of customers, Bafang Rust Removal skillfully integrates various rust removal technologies, tailors rust removal and anti-corrosion solutions for construction sites, warehouses, factories and industrial parks, and provides you with one-stop rust removal solutions to relieve your worries.

Remove rust in all directions, remove rust in all directions!

There are many ways to deal with steel rust, to reach a certain degree of rust, the surface of the steel bar is eroded called rust flake flower, which is the need to remove rust, if not rust, the steel bar matrix causes serious damage, then the steel bar is scrapped, the economic loss is huge, there are many rust removal equipment in the market at present, many equipment is currently widely used, the cost is very large, the effect is obvious, there will be rust return, and the "rust remover" recognized by the market in rust removal avoids the phenomenon of rust return after rusting, the main features.

1. High safety performance, no phosphorus, no volatile, no odor, non-toxic, non-flammable and explosive.

2. It has wide applicability, and can replace sulfuric acid, hydrochloric acid, nitric acid, and some strong acidic and state-controlled products that pollute the air environment.

3. The performance is efficient, the rust can be removed thoroughly, the substrate is not damaged, the rust is washed without water after the rust is removed, the follow-up process of post-treatment is not affected, and there is no rust return phenomenon after the weld is derusted.

4. The speed of rust removal can be completed in 10-50 minutes within the range of room temperature, and the time for severe erosion is longer, and the work of removing the oxide scale can be done.

5. Environmental protection and high efficiency, the pH value of the working liquid is neutral, the waste liquid is also weakly acidic, no acidification reaction will occur, there are no heavy metal ions, and the waste liquid can be directly discharged after simple treatment, which can avoid the cost and labor cost of customer wastewater treatment.

Earth rust removal is a steel bar environmental protection rust remover: a kind of organic acids (plant acid, citric acid and edible phosphoric acid), complexing agents, permeation agents, corrosion inhibitors, surfactants, water and thickeners and other raw materials to prepare a high-efficiency rust remover, steel bar rust remover has the characteristics of high efficiency, fast, low quality, convenient construction. Compared with the traditional pickling rust remover, there are many advantages, environmental protection, pollution-free, non-toxic and harmless, no corrosion of steel bars, only reaction to rust, does not affect the performance of steel bars, and can also improve the adhesion of steel bars to concrete, no washing.

Do not splash water if it is not dry for 24 hours after spraying the steel bar, otherwise there will be white ash, and it is forbidden to carry out rust removal construction on rainy days.

Before spraying steel bar rust remover, you can rinse it with water, and try to avoid the high temperature period at noon in summer construction, and catch up with the high temperature at noon in winter construction.

When spraying heavily corroded steel bars, be sure to spray a sufficient amount of rust remover, spray less will cause white ash, if white ash needs to be brushed again.

However, the rust of steel bars is a headache, the world's annual construction sites due to rust and damage of steel products accounted for one-tenth of the year's steel production, in China, the annual rust of steel bars amounted to nearly 100 million tons. Therefore, how to protect the steel bar from corrosion is of great significance.

Is steel rust removal a technical job? In this issue, teach you how to save the most cost of rust removal, and what are the advantages of steel bar rust removal?

At present, there are many kinds of treatment methods and countermeasures in the market, and there are generally the following methods for steel rust removal at construction sites:

1. Manual rust removal.

Manual rust removal is the most common method of steel rust removal, using tools such as shovels, wire brushes, scrapers, etc. The advantage of this kind of steel rust removal method is to save costs, but there are many disadvantages, such as large labor, low efficiency, and incomplete rust removal, which is only suitable for steel with a small rust removal area and a light degree of rust.

Second, the machine derusting.

Machine rust removal generally uses steel bar derusting machine, sandblasting equipment and high-pressure waterjet equipment to remove rust.

Three kinds. Steel bar derusting machine is a more commonly used mechanical derusting method, which is simple to operate, relatively stable, has high derusting efficiency, and will not pollute the environment. However, the steel bar descaling machine is only suitable for rebar raw material derusting.

Sandblasting and rust removal can effectively remove impurities on the metal surface, such as oxide scale, old rust, etc., and the rust removal effect is good.

High-pressure waterjet equipment rust removal is a high-pressure water gun that can remove soft concrete and slurry, exposing the joint surface. The part of the construction joint is smeared with cement slurry on the surface to increase the adhesion of the old and new concrete. The method is characterized by high production efficiency, low cost and less environmental pollution.

Chemical rust removers.

At present, the most environmentally friendly rust remover is a high-efficiency rust remover prepared from a variety of organic acids (vegetable acid, citric acid and edible phosphoric acid), complexing agents, permeation agents, corrosion inhibitors, surfactants, water and thickeners.

The main characteristics include high safety performance, no phosphorus, no volatile, no odor, non-toxic, non-flammable, high efficiency, thorough rust removal, no damage to the mother, water-free rinsing after rust removal is completed, no impact on post-treatment, and it is also a weakly acidic medium, which will not cause acidification reaction.

The method of removing rust from steel barsThere are many, you can use a steel bar derusting machine to remove rust, manual grinding to remove rustRebar rust removerSpraying rust removal, steel bar rust remover, soaking rust removal, etc., to say a simple method, orRebar rust removerSpraying is the simplest, as long as the sprayer sprays evenly, this is more suitable for bundlingRust removal of steel cages, saving time, labor and effort, so to speakThe easiest way to remove rust from steel barsFinish.

Slight rust of steel bars is not necessary to remove rust; If the rust is not serious, wipe it with an abrasive cloth; For more serious rust, the wire brush should be mechanically erased; If the rust is very serious, it should be verified whether the degree of rust is reduced and the diameter of the specification should be used, and a special study should be conducted. What rust remover to apply is 'show'! Deceive oneself as well as others.

There are many ways to remove rust from steel bars, manual rust removal, chemical rust removal, physical rust removal, etc., compared with these three methods, chemical rust removal is relatively simple, because chemical rust removal is the use of steel bar derusting agent to remove rust, and only need to pour the rust remover stock solution into the sprayer during operation, and then spray it on the surface of the steel bar, and whether it is the raw material of the steel bar, or the stirrups and beam bars that are tied.

There are the following methods for rapid rust removal of steel bars:

1. Use wire brushes, sack cloths and other props to gently wipe the rusty position of the steel bar, which can effectively remove rust;

2. Rub the rusty part of the steel bar in the sand to remove the rust spots;

3. Use sandblasting pipe equipment to remove rust spots on steel bars;

4. Use an air compressor to remove a strong high-pressure sand flow to remove rust spots on the surface of the steel bar.

Steel bar is one of the indispensable materials when building a house, which can make the house have a stronger load-bearing capacity, but if the steel bar is rusty, it must be dealt with in time so as not to affect the overall effect.

Summary. The calculation method of the manual engineering quantity of steel bar rust removal is as follows:1

Determine the area where the rebar is derusted. 2.Determine the level of steel bar rust removal.

3.According to different rust removal grades, choose the phase rust removal method and tools. 4.

Calculate the manual rust removal time. 5.According to the engineering quantity calculation formula, the manual engineering quantity of steel bar rust removal is calculated.

The calculation formula of engineering quantity is as follows: manual engineering quantity = area of manual rust removal coefficient wherein, area refers to the area of steel bar rust removal, manual rust removal time refers to the time of a worker to remove rust, and labor hour coefficient refers to the amount of work that a worker can complete within a certain period of time. According to the actual situation, different labor hour factors can be selected, generally between to.

The calculation method of the manual engineering quantity of steel bar rust removal is as follows:1Determine the area of the steel bar to be rusted.

2.Determine the level of steel bar rust removal. 3.

According to different rust removal grades, choose the phase rust removal method and tools. 4.Calculate the manual rust removal time.

5.According to the calculation formula of Jingsun stupid engineering quantity, the artificial engineering quantity of steel bar rust removal is calculated. The quantity calculation is as follows:

Artificial engineering quantity = area Artificial rust removal time coefficient wherein, area refers to the area of steel bar rust removal, manual rust removal time refers to the time of a worker to remove rust, and manual labor hour coefficient refers to the amount of work that a worker can complete within a certain period of time. According to the actual situation, different labor hour factors can be selected, generally between to.

How much is 1 The ** of steel rust removal varies from region to region, the amount of destruction and simplification, the degree of corrosion of steel bars, the rust removal method used and other factors, and the general ** is about 20-50 yuan square meters. It is best to consult the local rust removal company or construction team with high surplus sales, and they will give Qi You a more accurate ** according to the actual situation.