The appearance of cracks in concrete or reinforced concrete structures does not always mean that the building needs to be dismantled or a large-scale reconstruction is carried out. Modern technologies allow you to significantly increase the load-bearing capacity of columns, beams, walls and floor slabs without significantly increasing the weight of the structure.

One of the most effective methods today is structural bonding with Teknowrap carbon materials (FRP systems) using a special epoxy adhesive Teknobond 300 Tix.

When is reinforcement of concrete structures necessary?

Structural reinforcement is performed in cases:

  • the appearance of cracks in concrete;

  • exceeding design loads;

  • changes in the purpose of the building;

  • reconstruction of industrial and civil structures;

  • errors during construction;

  • reinforcement corrosion;

  • restoration of load-bearing capacity after damage.

Most often they strengthen:

  • columns;

  • beams;

  • floor slabs;

  • load-bearing walls;

  • bridges;

  • tanks;

  • industrial facilities;

  • other reinforced concrete structures.

What is structural bonding with carbon materials?

Structural bonding is a technology in which Teknowrap carbon fabric is glued to the surface of a concrete structure using Teknobond 300 Tix, a high-strength two-component epoxy adhesive .

Once hardened, the system works together with the reinforced concrete as a single structure. This increases the strength of the element, its stiffness, crack resistance and load-bearing capacity without the need for dismantling.

That is why this technology is widely used during the reconstruction of buildings, bridges, industrial facilities, and residential structures.

TEKNOWRAP carbon fabric

To reinforce the structures, high-strength Teknowrap carbon fabric is used with the following strength characteristics:

  • tensile modulus of elasticity — over 230,000 MPa ;

  • tensile strength — over 4900 MPa ;

  • elongation at break — 2.1% .

Due to these characteristics, carbon fabric effectively absorbs tensile loads and significantly strengthens concrete structures.

Teknobond 300 Tix epoxy adhesive

Teknobond 300 Tix is ​​used to glue carbon fabric , a two-component thixotropic, solvent-free epoxy adhesive.

The material is specially designed for structural bonding and reinforcement of reinforced concrete structures.

Main advantages:

  • high adhesion to concrete;

  • does not slip from vertical surfaces;

  • does not contain solvents;

  • ensures strong adhesion of carbon fabrics;

  • forms a durable structural connection.

Glue specifications

Teknobond 300 Tix has high mechanical strength:

  • bending strength — ≥40 MPa ;

  • compressive strength — ≥80 MPa ;

  • tensile strength — ≥30 MPa ;

  • adhesion to concrete — ≥4.0 MPa .

It is these characteristics that allow the system to effectively transfer loads between the concrete structure and the carbon fabric.

Carbon fabric reinforcement technology

Before carrying out work, the surface must be properly prepared.

Main stages:

  1. Clean the concrete from dust, dirt, cement laitance and weak areas.

  2. Level and repair the surface as needed using Teknorep high-strength repair compounds.

  3. Mix the epoxy glue components until smooth.

  4. Apply Teknobond 300 Tix to the concrete.

  5. Apply Teknowrap carbon fabric .

  6. Completely saturate the fabric with glue.

  7. Remove air pockets with a special roller.

After polymerization, Teknowrap carbon fabric begins to work together with the structure, significantly increasing its load-bearing capacity.

Advantages of carbon reinforcement

Compared to traditional reconstruction methods, structural bonding technology has a number of advantages:

  • reinforcement without dismantling the structure;

  • minimal weight gain;

  • quick completion of work;

  • high durability;

  • corrosion resistance;

  • minimal intervention in the structure;

  • increase in load-bearing capacity;

  • increasing crack resistance;

  • the possibility of working at existing facilities;

  • saving time and money compared to dismantling.

Where is the system used?

The Teknobond 300 Tix system and Teknowrap carbon fabric are used for:

  • reinforcement of columns;

  • beam reinforcement;

  • reinforcement of floor slabs;

  • strengthening of load-bearing walls;

  • reconstruction of bridges;

  • repair of industrial facilities;

  • repair of reinforced concrete structures;

  • restoration of the bearing capacity of concrete;

  • reinforcement of monolithic structures.

If it is necessary to increase the load-bearing capacity of a concrete or reinforced concrete structure without dismantling, one of the most effective modern solutions is structural bonding with carbon materials.

The combination of Teknowrap carbon fabric and Teknobond 300 Tix epoxy adhesive allows you to effectively strengthen columns, beams, floor slabs, walls, bridges and other structures, ensuring high strength, durability and reliability of the system even under significant operational loads.