GOOD TO KNOW

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Concrete has become very popular in architecture – is constitutes the basis of contemporary construction technology.
Concrete is a modern material, because it combines the features modern construction technology and traditional building material. The method of use depends only on the economic state of the potential investor. Concrete has become the condition of existence and a symbol of modernistic architecture. The technology of precast concrete still enables the engineer record breaking in breadth (the length of bridge spans) and height (skyscrapers).

The efficiency of construction belongs to the category of modernity. The reinforced slab and beam elements with high resistance enable for a large span, for example, in hypermarkets, production halls, multi-layer car parks. The concrete technology enables the industrial production of construction elements, based on the prefabrication rules as a requirement of efficiency or the creator’s intention due to time saving. The developed technology based on multi-use boarding allows for precise realization of sophisticated shapes and very complicated reinforced casts in production halls. Concrete as a load-bearing structure is usually hidden under layers of other materials that represent a structure. However, concrete shows shapes in full sun and determines the unity of structures, symbols and esthetics. The reinforced concrete possesses all features of stone’s perfection and that is why it is frequently called the stone of modernity. Used in this way, it is very often perceived as a natural material and it shows its new face. Well-prepared concrete is solid and time-resistant. It is a stone that can be cast.

Concrete shows the nobility of the boarding’s character – the depth of steel, the character of wood. A concrete casting can have a form of a compressed beam as well as a classical column or a modern pillar. PPH Gralbet pays a great attention to new material and technical possibilities. We think that futuristic architecture is the architecture of calculation and simplicity. It’s the architecture of reinforced concrete, iron, glass, cardboard, textile fibres and all materials that replace wood, stone and steel moldings, thanks to which maximum elasticity and lightness can be obtained. On the one hand, concrete has created a basis for designing solid and lasting constructions; on the other, it has become a new quality in categories of architectural esthetics. It gives the designer vast possibilities to obtain new effects in shaping the texture, colours and chiaroscuro of buildings’ elevation. After a temporary period of dislike, more frequently industrial and public facilities are designed as constructions made of prefabricated reinforced concrete elements. It stimulates the return of plants producing prefabricated elements using this technology.


In accordance with different requirements imposed by designers and investors, these companies must face the problem of producing elements with high parameters of strength, tightness and greater endurance. It is necessary to produce elements having unusual, very often complicated shapes. Shorter times of contracts realization force the producer of prefabricated elements to maximally shorten the time of the production process. In most cases, the technology of prefabricated elements production with steam, due to the increase in energy prices (coal, electricity, water), is inacceptable. It leads to basing the majority of production on the technology of concrete modified with chemical additions. This technology enables to get high early endurance, which allows for the elements’ demoulding and release of wire stretch (in cased of compressed prefabricated elements) in a much shorter time. The shortened production time means higher cost savings and greater production efficiency.

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In addition to the requirements of strength and endurance, a prefabricated element of good quality should have other characteristics: esthetic outer texture, the smallest number of pores, the homogeneity of colour – especially structurally coloured elements, as well as the precision of performance. Meeting these needs requires the possession of:
modern shaping technology, metal tables, adjustable, with the possibility of building additional sides and producing elements having diversified and very often complicated shapes, an appropriate technology of concrete that matches the type and amount of cement as well as aggregate; a small amount of water – a low water/cement rate that enables to shape and uplift the element in the stated time; appropriately chosen chemical additions that modify the parameters of fresh concrete mixture or hardened concrete, a modern system of producing prefabricated elements, providing and forming the mixture, vibration, accessories for casting-in, anti-adhesive agents, materials for finishing, cosmetics for repairing prefabricated elements.

Thanks to the use of modern techniques, the majority of buildings can be constructed using prefabricated elements. Octagonal buildings are ideal for prefabrication, because of great regularity and repeatability of the same elements, etc. In case of buildings with smaller regularity, the use of prefabricated elements is also possible. Thanks to the use of solid types of concrete, the cross-section of pillars can be halved. We use the following classes of concrete: B45, B50 and B60. Of course, the use of concrete with high endurance must by economically justified. Nevertheless, prefabrication provides greater effectiveness of construction by increasing the span and decreasing the size of particular elements. Prefabricated elements can be used in building industrial halls, multi-level car parks as well as housing buildings. Prefabrication known in the 1960s and 1980s, called “Panelak” is the past.

Today’s prefabrication has numerous benefits; the most important are the following:

  • high efficiency that enables the realization of important projects,
  • products directly from the factory,
  • shorter montage time,
  • independence from adverse weather conditions,
  • continuing the montage in the winter period, to the temperature -20°C
  • the system of quality control,
  • a chance for food architectural solutions,
  • fire-proof materials,
  • “healthy” construction,
  • the reduction of usage thanks to the possibility to accumulate heat in the concrete mixture,
  • an ecological method of construction with the optimal usage of materials, the recycling of waste, less noise and dust, etc.
  • cost-effective solutions.
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In order to meet these postulates, prefabricated elements must be designed with appropriate attention to details. That is why, each element must be designed. The project involves the utility model of the product, the process of creating the project, the graphics and the architectural project. The project itself is a creative activity connected with creating the product, leading to its diversity due to features, utility parameters, compliance with the standards, endurance, reliability, easiness of maintenance and style. The project involves drawings, calculations, descriptions and cost estimations. The offer of Gralbet is very diversified, from mass-produced standard elements, such as roof slabs PŻFF type to modernized systemic sets pillar – beam – girder. Few plants are ready to meet the challenges of such an individual order. Gralbet is able to produce moulds that guarantee the preservation of high dimensional precision.

To sum up, it is worth to know, that the quality of Gralbet’s products outmatches construction norms and their appearance as well as dimensional tolerances allow for their export.