Are you pouring new concrete over an old concrete screed?

Without an adhesion layer, concrete quickly begins to collapse and fall off. The most common mistake during repairs is pouring new concrete or repair mixture over old without using an adhesion promoter.

To avoid cracks, chips, and delamination, when repairing concrete surfaces, columns, stairs, floor slabs, and any reinforced concrete structures, Tekno AD corrosion inhibitor and adhesion enhancer is used .

Tekno AD is a dry mortar mixture containing special additives and corrosion inhibitors. It is used to improve the adhesion of old concrete surfaces to new ones. 

Tekno AD adhesion promoter is used in large engineering structures (metro, highway, tunnel, dam), in the repair and strengthening of concrete surfaces, to prevent corrosion in reinforced concrete structures.

Why doesn't "concrete on concrete" hold?

Old concrete has a closed porous structure and low adhesion. Without a special adhesion layer, new concrete does not become part of the old one, but works as a separate element. A seam appears between the layers, cracks form and the new concrete peels off. And over time, the surface begins to collapse.

Solution against concrete delamination: Tekno AD adhesion and anti-corrosion layer

Tekno AD creates a strong contact between the old and new concrete, forming one continuous monolith. At the same time, the material protects the reinforcement from further corrosion, which is especially important when repairing reinforced concrete.

Where is Tekno AD necessarily used?

  • repair and restoration of concrete structures;
  • completion and reinforcement of columns, beams, stairs, floor slabs;
  • pouring concrete on concrete;
  • work with exposed reinforcement.

Advantages of Tekno AD material

  • It is characterized by high mechanical strength, which ensures the reliability and durability of structures;
  • has excellent adhesion to concrete and reinforcement, guaranteeing strong adhesion without delamination;
  • effectively protects the reinforcement from moisture and corrosion processes;
  • easy to apply, simplifying and speeding up the work;
  • is non-toxic and safe for use both indoors and outdoors.

Technical specifications of Tekno AD

  • Compressive strength: 65 N/mm²
  • Bending tensile strength: 8 N/mm²
  • Bond strength to concrete base: 2 N/mm²

The use of Tekno AD adhesive layer is an important stage in the repair and restoration of concrete structures. 
It is the adhesion enhancer that guarantees reliable connection of old and new concrete, uniform distribution of loads and long service life of the entire structure. 
In the absence of an adhesive layer, concrete layers exist separately, which ultimately leads to cracks, chips, delamination and premature failure.
Using Tekno AD allows you to avoid these risks. The material provides a strong monolithic connection, increases the reliability of the repair and at the same time protects the reinforcement from moisture penetration and corrosion processes. As a result, you get reliable repair and restoration of the concrete structure for years.