System for fixing armours during concreting

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A Spanish university has developed a new and simple system that allows to fix any type of armours in concrete construction elements during the concreting process. This system avoids the movement of the armours in an efficient and reusable way, preventing future expensive treatments in case of unwanted movements. It is characterized by its low cost, light weight, ease of use and versatility for any constructive element. Companies are sought for licensing or technical cooperation agreements.

Partnership(s) sought
  • License agreement Technical cooperation agreement
Descripción completa

During the execution process of reinforced concrete construction elements, it is essential to fix the armours to avoid their movement during concreting. If this movement occurs, it will affect the coating itself, not being able to guarantee the necessary thickness for protection (the margin for errors during the execution process is minimal). This error can only be corrected a posteriori:

a) By bending the armours in the hardened concrete, which can weaken or damage the reinforcement.
b) By drilling and placing new armours with epoxy resins, which does not guarantee an equal adherence and resistance.

When the movement of the armour is excessive, the only solution is to demolish the constructive element and proceed to its complete reconstruction.

In general, the solutions carried out nowadays to prevent movement of the armours during concreting show the following disadvantages:

1) They do not meet the minimum coating required by the regulations.
2) They require a high installation time.
3) They are not reusable items.

To solve the technical problems described above, a Spanish research group have developed a system to allow fixing the armours in reinforced concrete elements during the concreting process, avoiding the movement of the armours. This system (Figures 1) is formed by at least two pieces: a main one and, at least, a secondary one. Both have simple geometry and little weight, being able to have variable length, width, thickness and form to adjust to the constructive needs in each case.

The pieces are joined by a deployment device that allows them to freely move and rotate in different directions. This device comprises a longitudinal orifice and a turning element (screw, pin, bolt, etc.), which allows the movement in one of the two pieces, or allows the longitudinal displacement of the secondary element on the main piece.

These parts have a fixing element that allows the system to be fastened to the armours and also to the base support (e.g., ground, forged, etc.), forming, as a whole, a non-deformable triangle.

This novel system, that can be manufactured by companies from different sectors (plastic, metal, wood, etc.), could be useful for the construction and building sectors. Then, industries of these sectors interested in acquiring this technology for its commercial exploitation via license agreements are sought. However, this system could be also of interest for manufacturers of plastic, metal, wood or other materials interested in opening new business lines. In addition, the research group is open to technical cooperation agreements to develop new applications.

Socio buscado:

- Specific area of activity of the partner: - Type of partner sought: Industries
- Specific area of activity of the partner: construction and building sector; manufacturers of metal, wood, plastic, etc.
- Task to be performed: Acquisition of this technology for its commercial exploitation through utility model license agreement or technical cooperation agreements for developing new applications.

Advantages & innovations:

The most innovative aspect of this technology is the fact that, nowadays, there are no patented systems on the market to solve the armours fixation in reinforced concrete construction elements in an efficiently, accurately and reusable way, since it is usually done manually. The above described system prevents the movement of the armours during the concreting process, avoiding to make expensive corrections afterwards.

While, the numerous advantages of this element over currently existing devices on the market are:

? It avoids the movement of the armours.
? It ensures the coating of the bars.
? It eliminates possible deviations.
? It avoids costly solutions a posteriori to correct wrong movements.
? Fixing is done quickly and safely.
? The necessary labour is reduced.
? Ease of use.
? The size and weight of the system are small.
? The system can be managed by a single worker.
? Space and security problems are avoided.
? The acquisition cost of the system is low.
? The pieces have a simple geometry.
? Ease to manufacture the pieces.
? It is possible to reuse it, which reduces the total cost of the product.
? It is very versatile, since it can be manufactured with different dimensions and formats.
? It can be used in any type of work and for armours in different sizes.
? It is extensible: it adjusts to any dimension of the constructive element (even in those of considerable lengths).
? Ease of production: due to its reduced dimensions and simple geometry, it can be manufactured by companies from different sectors: metal, wood, plastic, etc.
? Simple transport: being foldable and easily stackable.
? It can be removed without causing damage or damage to the armours.
? High speed and ease of implementation.
? No complementary machinery is necessary for its placement.

Development Stage:

Prototype available for demonstration - To demonstrate that the system meets all the requirements needed, a test about the fixation of armours in a pillar (with centred foundation) was carried out (Figure 2). The steps followed for the test procedure were:1. Preparation of the base element: 2. Positioning the system in a folded position on the base element (Figure 2 ? 1.).3. Deployment of the system (Figure 2 ? 2.).4. Fastening the system to the base support (Figure 2 ? 3.).


Other - This technology is protected by a utility model application in Spain.

Clasificado como: Ciencias de la vida Social, Economic and Education Issues

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