CZ31129U1 - A contact dismountable joint consisting of a prefabricated downstairs column and another upstairs column with fire protection - Google Patents

Description

Technical field

The technical solution relates to the demountable contact of prefabricated columns containing structural and material solutions in terms of ensuring fire resistance of the contact, airborne sound insulation requirements and protection of metal parts of the contact against corrosion.

BACKGROUND OF THE INVENTION

At present, the requirements of fire protection and acoustic protection of common permanent joints are solved by filling the joint, including any cavities and grooves with cement mortar, contact concrete, resp. mixtures based on silicates. In the case of dismountable joints, an easily removable mortar - a mixture based on silicates, or as a rule - is used for filling and sealing joints. lime hydrate with a filler of, for example, polystyrene beads, expanded clay and the like. This solution limits the required static function in some cases - eg articulated joints, flexible elastic joints, etc., and generally does not fully meet the requirements for easy disassembly and non-disturbance of prefabricated elements, so that their re-use is possible without major modifications. In another solution, the requirement for fire protection and acoustic properties is solved by means of a fire resistant and acoustic ceiling. tiling.

The essence of the technical solution

These deficiencies are largely eliminated by the proposed fire protection solution for the column joint sealing, which allows easy implementation and removal of protective and sealing means, thereby maintaining the principles of dismantling and re-assembly of prefabricated columns. The fire protection and contact sealing solution, which is a prerequisite for achieving airborne sound insulation, according to the utility model, consists of the so-called system sealing of the contact with a fire seal consisting of at least two basic components. The basic components consist of a thermally insulating base material and a surface-active foaming - intumescentmm material. The thermally insulating material may be of mineral fiber-based materials having a melting point of fibers at 1000 ° C, or based on flame retardant foams of fire-resistance class B, such as polyurethane foam PUR. A soft mineral fiber mass with a density of 55 to 70 kg / m ³ fills the space between the head and the heel of superimposed prefabricated columns in cases where the space - horizontal joint height - between the head and the heel of prefabricated columns is t <20 ± 2 In the case of a horizontal joint height t> 22 mm, rigid mineral fibers of 100-120 kg / m ³ are used in order to be able to be sealed around the perimeter of the structural foam, for example PUR, which after cutting with the column surface application of active material.

Another solution, especially for joints with a low joint height t <20 mm, is to use structural foam in the entire contact area. After the foam has been cut to match the surface of the prefabricated columns, the primary fire protection of the contact with the foaming trowel is performed.

Clarification of the drawing

The utility model will be explained in more detail with the aid of the drawings, in which Fig. 1 is a front elevation of a modification of the contact of the higher and lower storey columns in terms of fire protection and sealing according to the proposed solution. FIG. 2 is a front elevational view of a further modification of the contact between the higher and lower storey columns in terms of fire protection and sealing according to the proposed solution.

Examples of technical solutions

FIG. 1 shows the contact between the lower column 1 and the further upper column 2. The space between the head of the lower floor column I and the next upper floor column 2 is filled with a mass - a mineral fiber base material 3 and sealed with a foaming material 4

In the form of a putty, on which a layer of further foaming material 5 in the form of a foaming scraper is provided.

FIG. 2 shows an alternative solution according to a utility model. The space between the head of the lower floor column 1 and the next higher floor column 2 is filled with another thermally insulating backing material 6 is based on a polyurethane foam on which a layer of further foaming material 5 in the form of a foaming screed is provided.

Industrial applicability

A comprehensive solution of demountable contact of prefabricated columns according to this utility model will find use in the construction of both temporary and permanent buildings.

Claims (7)

PROTECTION REQUIREMENTS A contact demountable contact consisting of a prefabricated lower floor column (1) and another upper floor column (2) with fire protection, characterized in that the space between the lower floor column head (1) and the foot of the next upper floor column (2) is filled a heat insulating backing material (3, 6) provided with at least one surface-active foaming material (4, 5). Contact demountable contact according to claim 1, characterized in that the heat-insulating backing material (3) is a mineral fiber-based material, the contact of the columns (1, 2) being circumferentially sealed by a surface-active foaming material (4) in the form of on the surface of which another foaming material (5) in the form of a foaming spatula is placed. Contact demountable contact according to claim 1 or 2, characterized in that the thermal insulating backing material (3) is a mineral fiber-based material with a melting point above 1000 ° C. Contact demountable contact according to claim 3, characterized in that the thermal insulating backing material (3) consists of a soft mineral fiber material with a density of 55 to 70 kg / m ³ . Contact demountable contact according to claim 3, characterized in that the thermally insulating backing material (3) is a solid mineral fiber material with a bulk density of 100 to 120 kg / m ³ . Contact demountable contact according to claim 1, characterized in that the further thermal insulating backing material (6) is formed by a fire-retardant foam with reduced flammability on which another foaming material (5) in the form of a foaming scraper is placed. Contact demountable contact according to claim 6, characterized in that the further heat-insulating substrate (6) is based on polyurethane foam.