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• Features & Benefits
• Technical Characteristics
• Recommendations
• Application Procedure
• Precautions To Be Taken During And After Application
• Cleaning
• Consumption

Features & Benefits

Some application examples:

• Re-alkalising corrosion-inhibiting protection for reinforcing rods in the repair of concrete carried out with shrinkage-compensated mortars from the Mapegrout range or with standard cement mortars modified with synthetic based latex
• It can also be used for underground concrete construction

Technical Characteristics

Mapefer 1K is a one-component mortar prepared according to a formula developed in the MAPEI Research & Development laboratories based on polymers in powder form, cementitious binders and corrosion inhibitors to be applied on reinforcing rods to prevent rust formation.

Mixed with water, Mapefer 1K becomes a highly workable mortar that is easy to apply.

After hardening, Mapefer 1K is resistant to saline fog according to EN 15183 and impermeable to water and aggressive gases in the atmosphere.

The corrosion-inhibiting action of Mapefer 1K is provided through the following principal factors:

• High alkalinity
• Excellent adhesion to metal
• Presence of corrosion-inhibitors

Mapefer 1K meets the requirements defined by EN 1504-9 (“Products and systems for the protection and repair of concrete structures: definitions, requirements, quality control and evaluation of conformity - General principles for the use of products and systems”) and the minimum requirements claimed by EN 1504-7 (“Reinforcement corrosion protection”).

Recommendations

• Do not further dilute Mapefer 1K with water when the product begins to set
• Do not add cement or aggregates to Mapefer 1K
• Apply Mapefer 1K immediately after sandblasting (do not leave clean rods without protection for a long periods)
• Do not apply Mapefer 1K when the temperature is below 5°C

Application Procedure

Preparing the rods

To ensure that Mapefer 1K is able to develop its corrosion-inhibiting properties efficiently, it is essential that the rods are completely cleaned from rust before the treatment.

Sandblasting is recommended to clean the rods down to metal.

If for logistical reasons this is not possible, vigorous brushing of the metal surface should be carefully and thoroughly carried out to remove all rust.

Any additional reinforcement must be treated in the same way.

Preparing the product

Pour 1.0-1.1 l of clean water into a clean container and, while mixing, slowly disperse 5 kg of Mapefer 1K.

Mix the product until a lump-free homogeneous paste is obtained. Once prepared, Mapefer 1K must be applied within 1 hour.

Application

Apply two coats of Mapefer 1K with a brush.

The second coat can be applied approximately 2 hours after the application of the first coat and preferably within 24 hours.

It is recommended to completely cover the surfaces of the rods in a homogeneous coat. The total thickness of the two coats must be at least 2 mm.

Inevitably, during the Mapefer 1K application, the surrounding concrete will also get coated. This will not create problems of bonding of other mortars that will be used for the reconstruction. Repairs with products from the Mapegrout range must be carried out once Mapefer 1K has dried (approximately 6 hours at 20°C).

Precautions To Be Taken During And After Application

No special precautions need to be taken when the temperature is between 5°C and 35°C. In hot weather do not expose the mixed material to direct sunlight, because the pot life will be reduced.

Cleaning

While still fresh, Mapefer 1K can be removed from brushes and tools with water. Once hardened, it can only be removed mechanically.

Consumption

100 g/m per reinforcing rod with an 8 mm diameter and 200 g/m per reinforcing rod with 16 mm (2 mm of applied product).