When repairing concrete structures, it is not enough to simply apply a repair mixture. One of the most common causes of repeated destruction is poor adhesion of the new material to the old concrete base. That is why professional repair always begins with the application of an adhesive layer for concrete, which ensures a strong connection between the layers and significantly reduces the risk of delamination.

Tekno AD is a cementitious contact layer and anti-corrosion protection for reinforcement that is applied before repair mixtures to create a monolithic layer between old and new concrete.

Why is a Tekno Ad adhesion layer needed before concrete repair?

Many people are looking for something to treat concrete before repair mix, a contact layer for concrete, an adhesion primer. We tell you why this stage is so important.

Without a special adhesive layer, the following are possible:

  • peeling of the repair mixture;

  • the appearance of cracks;

  • weak adhesion of new and old concrete;

  • water penetration;

  • repeated destruction of the concrete structure.

It is the contact layer that provides reliable adhesion between the layers and significantly increases the durability of the repair.

What is Tekno AD?

Tekno AD is a professional adhesive layer for concrete repair, used before applying cementitious repair mixtures.

The material simultaneously performs two important functions:

  • creates a highly adhesive contact layer between old and new concrete;

  • provides anti-corrosion protection of exposed fittings.

Unlike conventional primers, Tekno AD works as a full-fledged cementitious adhesion bridge.

Why do repair compounds peel off?

Even the highest quality repair mixture will not provide a lasting result if the concrete base is poorly prepared.

The main causes of peeling:

  • dust on the surface;

  • cement milk;

  • weak areas of concrete;

  • dry base;

  • lack of contact layer;

  • applying repair mixture without an adhesive layer.

That is why professional concrete repair technology involves the use of a special cement contact layer.

How to properly prepare concrete for repair?

Before applying the Tekno AD adhesive layer, it is necessary to:

Remove weak concrete

Remove from the surface:

  • cement milk;

  • dust;

  • paint residue;

  • dirt;

  • weak concrete;

  • old coatings.

The stronger the foundation, the more reliable the repair will be.

Clean the surface

The best result is provided by a Kärcher high-pressure cleaner.

A powerful jet of water cleans the pores of the concrete and removes all weak particles.

If concrete crumbles during cleaning, it must be completely removed to a solid base.

Moisten the concrete

The surface must be damp before applying the adhesive layer.

A dry substrate quickly absorbs water from the repair mixture, which negatively affects the bond strength.

How to apply Tekno AD?

To prepare the material, use 3.5–4 liters of clean water per 20 kg of dry mixture.

The solution is mixed with a low-speed mixer until a homogeneous consistency.

After that, the material is thoroughly rubbed into the moistened concrete base with a stiff brush or trowel.

It is the rubbing that ensures maximum penetration of the material into the pores of the concrete and creates a strong contact layer.

Monolithic repair without delamination

The main purpose of Tekno AD is to form the strongest possible bond between old and new concrete.

After applying the adhesive layer, the repair mixtures work as a single structure.

This allows:

  • significantly reduce the risk of peeling;

  • increase the strength of the repair;

  • ensure uniform load distribution;

  • increase the service life of the concrete structure.

That is why Tekno AD is used before applying Teknorep , Teknoself and Teknogrout repair mixtures .

Anti-corrosion protection of fittings

During repairs, fittings are often opened.

Tekno AD contains corrosion inhibitors that:

  • protect the reinforcement from moisture;

  • reduce the risk of rust;

  • extend the service life of reinforced concrete structures;

  • improve the durability of the repair.

Where is Tekno AD used?

Material recommended for repair:

  • concrete floor;

  • industrial floors;

  • concrete screed;

  • stairs;

  • columns;

  • foundations;

  • floor slabs;

  • retaining walls;

  • balconies;

  • terrace;

  • tanks;

  • reinforced concrete structures.

Main advantages of Tekno AD

  • high adhesion to concrete - 2 MPa;

  • compressive strength - 65 MPa;

  • bending strength — 8 MPa;

  • creating a contact layer between old and new concrete;

  • reducing the risk of peeling of the repair mixture;

  • anti-corrosion protection of reinforcement;

  • simple application;

  • compatibility with cement repair mixtures;

  • professional solution for repairing concrete and reinforced concrete structures.

  • high frost resistance and durability of the repair layer;
  • improving the adhesion of repair compounds to the concrete base;
  • suitable for repairing columns, beams, floor slabs, foundations and other reinforced concrete structures.

If you are planning to repair concrete, concrete floors, foundations, stairs, screeds or reinforced concrete structures, be sure to use an adhesion layer before applying the repair mixture. It is this layer that provides strong adhesion between old and new concrete, helps to create a virtually monolithic repair layer and significantly reduces the risk of delamination. Tekno AD combines the functions of a contact layer and anti-corrosion protection of reinforcement, which makes it an effective solution for long-term repair of concrete structures.