Pathologies encountered by our clients
01. Incorrect design or construction
02. Ageing of the structure or external aggression
03. Severe damage caused by accidental events
04. Increase in service loads
Advantages of dry shotcrete
This strengthening technique is implemented by transporting a dry mix of cement and aggregate through a pipe at high speed using compressed air, then adding water to the nozzle and spraying it onto a given surface.
With over 100 years of history, dry shotcrete is a proven technology that is considered one of the most effective techniques for structural repairs and reinforcement work, when implemented by specialists.
The technology is now covered by multiple standards: American Concrete Institute (ACI) and ASTM standards, European standards and EFNARC European association, UK Spray Concrete Association (SCA), Concrete Institute of Australia, etc.
The performance and reliability of this reinforcement solution is such that designers now consider the reinforced structure as monolithic and can therefore calculate it using the codes applicable to new constructions.
The technique allows very strong adhesion of the new concrete to the existing concrete or masonry substrate.
Depending on the application, the strength of the concrete is adjusted between 20 and 60 MPa compressive strength on the cores.
The concrete mix design is selected, or revised if necessary, to meet the requirements of the intended application: atmospheric bridges, underground tunnels, marine port infrastructure, etc.
Long conveying lengths, both horizontally and vertically, allowing for long distances between the nozzles and the spraying equipment.
Beams, columns and floor slabs, arches, vaults, precast elements, circular structures, etc.
From structural analysis to implementation
Structural analysis:
we help solve your problems
Before repairing or reinforcing, the condition of the structure and its load-bearing capacity must be assessed. Freyssinet can help with the diagnosis: visual inspection, destructive and non-destructive testing, stress analysis, etc.
Engineering solution:
the right solution at the right place
We assist you in developing a repair strategy or in checking its feasibility. Our engineers analyse the project specifications, draw up plans and calculation notes. They select the appropriate equipment and define the production programme.
Guaranteed results at execution:
a complete control of the implementation
The composition of the dry mix, the power of the equipment and the skills of the nozzlemen are essential to deliver a quality job. The Foreva Shotcrete solution is applied by our experienced nozzlemen, certified in-house under a dedicated quality charter.
Dry shotcrete: a wide range of applications
Buildings
- Smooth surface
- Similar strength to
the parent concrete - Similar modulus of elasticity
than the parent concrete
Bridges
- High compressive strength
- High E-modulus value
- High adhesion
Railway tunnels
- Fast return to service
- Vibration resistant
Marine structures
- Steel reinforcing bars protected from corrosion
- Reduced water absorption of the concrete cover
Buildings
- Smooth surface
- Similar strength to
the parent concrete - Similar modulus of elasticity
than the parent concrete
Bridges
- High compressive strength
- High E-modulus value
- High adhesion
Railway tunnels
- Fast return to service
- Vibration resistant
Marine structures
- Steel reinforcing bars protected from corrosion
- Reduced water absorption of the concrete cover
Download our brochure
DocumentationFind out more in our case studies
Channel Tunnel concrete repairs
Clemenceau Medical Center rehabilitation
Hjar Ennhal bridge structural strengthening
Y Bridge widening and strengthening
Discover our solutions per type of structure
Contact us
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