Environmental conditions and usage and dosage of steel bar rust inhibitor

1. Environment and conditions for using steel bar rust inhibitor:

1. Marine environment: seawater corrosion Area, tidal area, wave measurement area and ocean atmosphere area;

2. Use sea sand as concrete sand, and the chloride salt content in the construction water exceeds the standard requirements

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3. Reinforced concrete bridges using melted ice (snow) salt;

4. Using chlorine Industrial and civil buildings centered on salt corrosion

5. Repair of existing reinforced concrete projects;

6. Use low-alkalinity cement or materials that can reduce the alkalinity of concrete;

7. Embedded parts or steel products need to be strengthened in concrete Protect.

2. The dosage of steel bar rust inhibitor

The dosage of steel bar rust inhibitor Depends on the amount of corrosive medium entering the concrete during the design life period. When chlorine salt is the main component, the dosage of rust inhibitor should meet the following ratio requirements: for powder type, RI/CI-≥1.2; for water type, the ratio is, RI/CI->3 (both are weight ratios).

When the amount of salt entering the concrete during the design life is not clear, the amount of rust inhibitor can be determined according to the following table.

Rust inhibitor dosage

Incorporation can improve the density of concrete without significantly reducing it When the alkalinity of the steel is reduced, the amount of steel rust inhibitor can be reduced as appropriate; under special corrosion conditions, in addition to using steel rust inhibitors, other protective measures should be taken.

3. How to use steel bar rust inhibitor

1. Aqueous rust inhibitor can be Mix it into the mixing water and deduct the same amount of water as the added liquid rust inhibitor.

2. Powder-type rust inhibitor can be mixed dry or dissolved in mixing water. The mixing time needs to be extended to >3 minutes. Reduce water appropriately while maintaining the same fluidity.

3. The physical and mechanical performance tests of concrete mixed with rust inhibitors are conducted according to conventional methods, and the concrete anti-rust performance tests are conducted according to methods. </p