Gliding bed for concrete slabs, process for the production of a concrete slab and structure with a gliding bed
AssigneeVSL International AG
InventorsJohann Kollegger, Anton Schweighofer
Life of this patent
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Abstract
A gliding bed for a concrete slab comprises a first film and a second film wherein the first film can be brought into contact with a foundation of the concrete bottom slab and the second film can be brought into contact with a bottom side of the concrete slab by pouring concrete onto the second film and which films are tightly connected to each other at edges. In order to minimize friction between the concrete slab and the foundation, at least one gas- and liquid-permeable layer formed from a fleece and/or a textile fabric, a woven fabric or a knitted fabric is provided between the films.
Claims25
A gliding bed for a concrete slab, the gliding bed comprising:
- a first film;
- and
- a second film,
- wherein the first film is configured to be brought into contact with a foundation of the concrete slab and the second film is configured to be brought into contact with a bottom side of the concrete slab by pouring concrete onto the second film,
- wherein the first film and the second film are tightly connected to each other at their edges,
- wherein at least one gas- and liquid-permeable layer formed from a fleece and/or a textile fabric, a woven fabric or a knitted fabric is provided between the first film and the second film,
- wherein the first film, the second film and the at least one gas- and liquid-permeable layer are configured to reduce a friction between the concrete slab and the foundation when the concrete slab is subject to movement,
- wherein the first film and the second film are configured to maintain a positive pressure in the gliding bed.
A process for the production of a concrete bottom slab using a gliding bed, the process comprising:
- placing a first film on a foundation of a concrete slab,
- placing at least one gas- and liquid-permeable layer, formed from a fleece and/or a textile fabric, a woven fabric or a knitted fabric, on the first film,
- covering the at least one gas- and liquid-permeable layer with a second film,
- wherein the first film, the at least one gas- and liquid-permeable layer, and the second film form the gliding bed,
- hermetically interconnecting the first film and the second film at their edges, concreting the concrete slab on the gliding bed,
- introducing a liquid or gaseous medium into the gliding bed at a predetermined minimum pressure, and
- maintaining the minimum pressure in the gliding bed until the concrete slab has cured.
A process for the production of a concrete bottom slab using a gliding bed, the process comprising:
- placing a first film on a subsurface,
- placing at least one gas- and liquid-permeable layer, formed from a fleece and/or a textile fabric, a woven fabric or a knitted fabric, on the first film,
- covering the at least one gas- and liquid-permeable layer with a second film,
- wherein the first film, the at least one gas- and liquid-permeable layer, and the second film form the gliding bed,
- hermetically connecting the first film and the second film at their edges, subsequently, placing the gliding bed formed from the first and second films and the intermediate layer on a foundation of the concrete slab to be produced,
- concreting the concrete slab on the gliding bed,
- introducing a liquid or gaseous medium into the gliding bed at a predetermined minimum pressure, and
- maintaining the minimum pressure in the gliding bed until the concrete slab has cured.
A structure comprising a foundation, a gliding bed and a concrete bottom slab, wherein the gliding bed comprises:
- a first film and a second film, wherein the first film and the second film are tightly connected to each other at edges;
- and
- at least one gas- and liquid-permeable layer formed from a fleece and/or a textile fabric, a woven fabric or a knitted fabric is formed between the first film and the second film, wherein the first film lies on the foundation of the concrete bottom slab and the second film lies on a bottom side of the concrete bottom slab by pouring concrete onto the second film,
- wherein the first film, the second film and the at least one gas- and liquid-permeable layer are configured to reduce a friction between the concrete slab and the foundation,
- wherein the first film and the second film are configured to maintain a pressure.
Dependencies are inferred from the claim text.