Definition and principle

Epoxy resin is a thermosetting polymer made up of two components: the resin and the hardener. When they are mixed, a chemical reaction occurs, forming a solid, adherent and resistant material. This resin is particularly prized for its performance in repairing and reinforcing concrete structures.

Epoxy resin - AI

Advantages of epoxy resin for repairing cracks

There are several major advantages to using epoxy resin to seal cracks :

  1. High mechanical strength: Once cured, epoxy resin offers greater compressive and tensile strength than concrete, ensuring a long-lasting repair.

  2. Excellent adhesion: It adheres perfectly to concrete surfaces, ensuring a solid bond between cracked areas.

  3. Waterproofing: Epoxy resin creates a waterproof barrier, preventing water infiltration and corrosion of metal reinforcement.

  4. Durability: Repairs made with epoxy resin are long-lasting, resisting chemical attack and temperature variations.

Fields of application

Epoxy resin is used in a variety of contexts to repair cracks :

  • Foundations: To reinforce cracked foundations and prevent water infiltration (e.g. in swimming pools).

  • Slabs and floors: To restore the integrity of horizontal surfaces subjected to heavy loads.

  • Load-bearing walls: To seal structural cracks and ensure the stability of buildings.

  • Engineering structures: Bridges, tunnels and viaducts also benefit from the maintenance properties of epoxy resin.

Service 2-1

Example of application by r3constructioninc

Epoxy resin application

Repairing cracks with epoxy resin follows a precise process :

  1. Crack preparation: Thorough cleaning to remove dust, oil and other contaminants.

  2. Installation of injection ports: Fixing nozzles along the crack to allow the resin to be injected.

  3. Surface sealing: Application of a sealant to prevent the resin escaping during injection.

  4. Resin injection: Use of a pump to inject the epoxy resin under pressure, ensuring complete filling of the crack.

  5. Curing: Setting time varies according to the formulation, generally between 2 and 4 hours.

  6. Finishing: Sanding and cleaning the surface for an aesthetic finish.

Example of application by CHEMIFIX

Wagner SF 23 CR airless injection pump – 2415601

The Wagner SF 23 CR is ideally suited to use as a professional injection pump, particularly for the application of consolidating agents and coating products.
Designed specifically for masonry restoration work, moisture treatment, water damage and structural repairs to concrete, it can be used to inject epoxy resins, polyurethane (PU), SPUR foam or water-based solutions.
Its pump head and diaphragm have been specially optimised to meet the high demands of this type of application.

  • Motor power: 1.3 kW
  • Voltage: 230 V / 50 Hz
  • Maximum flow rate: 2.6 l/min
  • Maximum working pressure: 250 bar
  • Weight: 29 kg

Wagner SF 23 CR pump on sale by Airless Discounter

 Wagner-SF-23-CR-2415601 Qu'est-ce que la résine époxy ?

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Epoxy resin is an effective, long-lasting solution for repairing cracks in concrete. Its mechanical properties and excellent adhesion make it a preferred choice for building professionals concerned about the durability of their structures. To ensure optimum results, it is advisable to call in specialists with experience in applying this type of resin.

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