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.
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ApplicationsBridges
Buildings
Industrial facilities
Tunnels & culverts
Port & Waterway structures
Water infrastructures
Pathologies encountered by our clients
Lack of concrete cover to protect rebars, lack of reinforcing bars, insufficient cross section, etc
Concrete carbonation, concrete chloride contamination, masonry deterioration, etc
Damage to the concrete surface due to hydrocarbon fires, impacts, hydraulic abrasion, etc.
When the level of service loads is increased, dry-sprayed concrete can be used to strengthen the structure by increasing the reinforced concrete sections.
Why choose the dry shotcrete technique for your project?
01. Very high adhesion
The technique allows very strong adhesion of the new concrete to the existing concrete or masonry substrate.
02. Very high strength
Depending on the application, the strength of the concrete is adjusted between 20 and 60 MPa compressive strength on the cores.
03. Almost no formwork required
04. Long conveying lengths
Long conveying lengths, both horizontally and vertically, allowing for long distances between the nozzles and the spraying equipment.
05. Applicable to all types of structural elements
Beams, columns and floor slabs, arches, vaults, precast elements, circular structures, etc.
06. Formulation according to the application
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.
07. The result is considered monolithic
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.
08. 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.
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
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DocumentationFind out more in our case studies
Discover our solutions per type of structure
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