Fast-setting concrete technology

Construction d'escaliers en feuille de béton

Presentation of the fast-setting concrete technology (a new congealed concrete method)

The differences between fast-setting concrete and reinforced concrete technology

Fast-setting concrete technology for stairs 

Escalier en colimaçon à Genève, en Romandie.

↑ Fast-setting concrete staircase formwork (Classic model)

Notre modèle Blade est une escalier fin et élégant construit en Suisse.

↑ Fast-setting concrete staircase formwork (Blade model)

  • Thanks to this method, it is possible to develop congealed-concrete load-bearing structures with fine sections, which are very strong, large scale, and with reinforcements planned in advance.
  • The structures developed using this technology are ideal for creating interior design installations such as stairs, furniture; for creating individual and collective housing of the monolith type or from prefabricated building elements with one or more storeys. It is also perfect for building second homes and pavilions, adding house and roof elevations, constructing industrial buildings and public buildings as well as separating elements.
  • From congealed concrete slabs, with a fine plaster surface, we can create structures with closed and open profiles, with made-to-measure dimensions, shape and span as well as the material and the load of use. All in accordance with your wishes. It can be used when making pillars, beams with closed and open profiles, slab floor elements with edges or box type, partitions.

Reinforced concrete technology for stairs

Construction escalier en béton armé

↑ Reinforced concrete staircase formwork

Coffrage escalier en beton armé

↑ Reinforced concrete staircase formwork

  • It is well known that the reinforced concrete structure is one of the most often used structure types in construction. It can be made in a traditional way from admixtures based on sand and gravel.
  • The disadvantage of this common solution is that the normal reinforced concrete structure is heavy and bulky, solidifies slowly, thus causing considerable lateral pressure on the formwork, this is the reason why it is necessary to guarantee the rigidity of the formwork.
  • Another disadvantage is that the combination of water and cement does not allow an optimal mechanical resistance value, this is why it is necessary to compact and additionally treat these structures, which also requires a lot of energy.
  • Other than that, the construction takes a long time, because it mainly depends on the rhythm of concrete solidification, which takes 28 days for traditional reinforced concrete structures.
  • The concrete thus obtained is dense. The reinforcement of structures can only be made with the help of long steel elements, usually of large diameter, and with complicated iron bends.

Video of the fast-setting concrete staircase construction – BLADE model

Phases of the fast-setting concrete staircase construction

  • The “reinforced concrete structure", based on new materials has led to an innovative solution called fast-setting concrete, allowing pre-assembly.
  • The technology is based on the fact that by using the assembly of hydrophilic formwork elements, prefabricated to measure, in accordance with the customer's requirements, carried out by made-to-measure reinforcements, threaded by the spacers installed in the formwork elements, we can develop a durable and hydrophilic formwork, by pouring plastic sand concrete into it. We can obtain ridges that function as load carriers. We use Portland cement, homogeneous or heterogeneous, with a high cement content, preferably 470-650 kg/m3, as a binder of the congealed concrete. We work, as an adjuvant, with classified sand, homogeneous, with a maximum size of max. 4.00 mm. Depending on the quantity and quality of the cement to be used, in accordance with the weight ratio of sand/cement, we determine the necessary amount of the components of the congealed concrete. Then, considering the weight ratio of the sand/cement by adding the quantity of precalculated sand, we proceed to the production of the congealed concrete to the desired technical parameters.
  • Then we put the resulting mixture in a forced-action mixer for at least three minutes.
  • After it is mixed, the plastic sand concrete thus obtained is poured into the cells of the formwork elements and covered with congealed concrete. We have thus developed the supporting structure in congealed concrete, with the required technical characteristics.
  • We typically use clean, homogeneous Portland cement or blast furnace slag cement from Portland or Portland cement with heterogeneous ash.
  • Another characteristic of our fast-setting concrete technology is that we develop the formwork elements, depending on their application, as formwork elements of one or two layers. The total thickness of a formwork element is almost equivalent to the thickness of the congealed concrete between the formwork elements.

Click to access our fast-setting concrete staircases

Sources and articles on the technology

The following articles and presentations by Dr. Gábor Kászonyi offer a technical approach to the invention:

  • The congealed concrete structure (Construction Market year XXXII, n ° 10, May 1998);
  • Design of fast-setting concrete in Hungary (Pierre et Plâtre, year II, n ° 10, June 1998);
  • Design of fast-setting concrete in Hungary (ÉPKÓ, Székelyudvarhely, June 1998, 4–6);
  • Congealed concrete structures in Hungary (YMMF Yearbook, 1998);
  • New Methods Relating to Sizing of fast-setting concrete Structures (Cleveland, USA, November 26, 1998);
  • Design and construction of congealed concrete structures in Hungary ”(New Hungarian Art of Construction, 1998/4);
  • Design of congealed concrete structures in Hungary ”(ÉRT. Referencia tár, 1999).

You can find other references in the works of the following authors:

  • dr. György Balázs “Concrete and reinforced concrete structures in civil engineering” (Concrete and reinforced concrete III., Academic Publishing House, Budapest, 1996, p. 123);
  • dr. Zoltán Bachmann "Book of Architecture" (JPTE University Press Pécs, 1998, p. 25–30)

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We build and renovate exterior and interior stairs throughout SWITZERLAND and FRANCE.