Concrete Floor Device

Inactive Publication Date: 2009-12-10
SKANSKA SVERIGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Therefore object of the present invention is to provide a concrete floor assembly, which makes it possible to lay a flat floor in a cost-effective manner and at a desired vertical level, and to provide a method of making such a concrete floor assembly and a method of making a floor assembly.

Problems solved by technology

Due to this curvature, it is usually not possible to lay a floor directly on top of them.
One disadvantage of this system is that it requires much work and is time-consuming.
In addition, it is difficult to achieve high precision, which may result in a resilient or inclined floor.
One disadvantage of the use of screed is that it is expensive.
Thus, it is not desirable to apply screed in layers that are thick enough for the embedment of electric or water conduits.
In addition, it is difficult to predict how well the screed will dry out and how long it will take for the screed to dry when applied in such thick layers.
If the base is not dry enough when the floor is laid (for instance a parquet or a plastic carpet), the floor can be damaged by the moisture or mildew problems can arise.
They have shown that if ordinary concrete is cast on a prefabricated hollow core slab in layers thinner than 100 mm, problems arise in the adhering of the concrete to the base both centrally and along the edges due to loss of bond and edge lifting, respectively.
This is above all due to the fact that thin layers have a high moisture gradient, which causes the surface layer to bend.
In most cases, it is not possible to use concrete layers with sufficient thickness to avoid these problems, since this requires such large volumes that also the use of ordinary concrete would be too expensive.
It is also a problem that thick concrete layers need a long time to dry out, which delays the construction process, thus also making it more expensive.

Method used

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Examples

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Embodiment Construction

[0056]With reference to FIGS. 1 and 2, a concrete floor assembly according to the invention is schematically shown. The concrete floor assembly comprises a subfloor element in the form of a prefabricated hollow core slab 1. The hollow core slab 1 comprises longitudinal reinforcement wires 2 that prestress the hollow core slab 1, whereby it obtains a curved longitudinal section. The prestress and the curved shape advantageously provide a good ability to absorb tensions and thus also a good load-carrying ability. The hollow core slab 1 is furthermore formed with weight-reducing recesses in the form of longitudinal holes 3. The hollow core slab 1 according to the example is 10 m×1.20 m×0.265 m.

[0057]The hollow core slab 1 has a floor side 9 which in use is an upper side and a ground / ceiling side 10 which in use is an underside. The hollow core slab 1 has an arched shape, the curvature being directed upwards in use. If the hollow core slab 1 is placed on a flat base, the difference in h...

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Abstract

A concrete floor assembly is disclosed including a subfloor element with a floor side and a ground / ceiling side, and a top casting layer. In at least one embodiment, the subfloor element includes a concrete portion on the floor side, which concrete portion has a bottom casting surface with a surface roughness. The top casting layer includes a casting composition, which includes a self-compacting concrete and a shrinkage reducing admixture. The top casting layer is cast on the floor side of the subfloor element so that at least a portion of the bottom casting surface is covered by the top casting layer, the bottom casting surface having such surface roughness that the top casting layer adheres to the bottom casting surface. A method of providing such a concrete floor assembly is also disclosed, as well as a floor assembly.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention relates to a concrete floor device or assembly and to a method of providing such a concrete floor element as well as a method of providing a floor assembly.TECHNICAL BACKGROUND OF THE INVENTION[0002]A floor structure is a substantially horizontal, structural element which separates different storeys of a building, or the ground floor of the house and the ground. In addition to a structural element, the so-called structural floor, a floor structure also includes floor and ceiling. The structural floor is part of the structural framework of a building and its main function is to carry the load of the storey, such as the floor, the ceiling, interior walls and fittings, and to transfer the weight of this load to structural walls and columns.[0003]A floor structure must satisfy a number of requirements. It must have the capacity to carry the load of the storey and have sufficient stiffness, so that the deflections (the resilienc...

Claims

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Application Information

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IPC IPC(8): E04B5/48E04B5/32
CPCC04B28/02C04B2111/00103E04F15/12E04B5/38E04B5/17E04B5/043C04B2111/62C04B2111/60C04B2111/00612C04B14/28C04B40/04C04B41/5323C04B14/22
InventorFALK, JORGENJOHANSSON, THOMASPETERSON, MARKUSSVENMAR, PETER
OwnerSKANSKA SVERIGE