DE102005015442A1 - Thin layer floor deck for building has thin walled deck layers with sandwich construction using lightweight concrete and foam cores - Google Patents

Abstract

The thin layer floor for a building has two lightweight concrete deck layers (1,2) in a sandwich construction with projections into the supporting wall (5) and a foam core (3). Alternatively, there can be two metal sheets perforated at their ends and glued to a core, and with openings for lifting flanges. The metal layers are outwardly faced with concrete or plasterboard panels.

Description

The Conversion of closed-cell foams into open-celled ones ( "Reticulate foam ") results when canceling cell walls through secondary Technologies as hydrolysis, oxidation or mechanical treatment.

to Time is limited and effectively stainless steel in construction. One produces a variety of filament yarns from chemical fibers for technical fabrics.

CRITICISM OF THE STATE OF THE ART

The Production of rigid foam panels from open-cell foams is not yet taken place. The use of stainless small equipment for reinforced concrete can significantly contribute to the production of lightweight thin-walled constructions, because these days only for Corrosion-aggressive conditions of the case.

recycled for construction practice do not satisfy heavy floor slab need airborne sound insulation in about 53 DB.

Because Addition of chemical fibers in concrete and plaster for improved strength and fire safety is widely used, technical fabric as Reinforcement in civil engineering has so far been mainly a research object.

at static calculations of composite structures friction and Liability forces become do not consider. Dismantled in many Eastern European countries buildings with strained on construction site ropes, where the floor slabs just go through Friction (and partially Liability forces) without any support from below and binding reinforcement are preserved in extreme Conditions Earthquakes in 7-8 bales of Richter scale. For improvement of composite properties needs construction of rolled metallurgy Sheets with elevated Roughness.

TASK OF THE INVENTION

It The object of the invention is to provide a lightweight thin-walled construction, as an economic floor or supporting wall of all building physics and static requirements.

For sandwich plate succeeds with open-cell foam core, playing for composite panel crucial Roll the dowels made of stainless steel, light galvanized steel trapezoidal profiles and the plates with increased Fire and sound insulation from gypsum fibers.

With the technical fabric of bundled To a yarn of alkali-resistant glass fiber filaments to achieve corrosion-free Reinforcement for one Slab of concrete, gypsum or plaster concrete for upper ("floor") or lower ceiling ("ceiling") of bivalves Construction.

SOLUTION OF THE TASK

1. sandwich construction. D c Reinforcement of ceiling layers 5 . 7 ( 1 ) consists of two identical non-bearing mats with a width of approx. 3 m, due to transpartition. For residential and office buildings one uses tightly arranged in one or two directions reinforcing bars, depending on the ratio of length / width for floor slab.

The thin-walled ceiling layers with excellent reinforcement connections in the supporting wall are made using flexible small formwork 11 concreted.

theory of sandwich structures, which have in engineering and aircraft as an alliance of two steely ones Ceiling layers and soft light core have long history is based on shear stress corresponding to shear modulus of nuclear material on boundaries between layers.

Frictional final clamping of protrusions of the reinforcement 8th in cast-in-situ concrete 12 on continuation for supporting wall 4 with own projections 9 favors satisfying standard requirement for limited deflection in the middle of span.

Normally, this delicate construction needs as a precast ( 1c ) surrounding traverse 13 for loading and unloading of transport. Otherwise, additional connections will be made 15 between both ceiling layers 5 . 7 necessary, at least for lifting loops ( 1b ).

Use of rough steel sheets 18 . 19 instead of round reinforcement with your gluing to core layer 6 appears as a more economical alternative ( 2 ). If the sheets 18 Having a total perforating structure, fresh concrete penetrates into openings, adhering to the foam core 6 and acts against shear stresses in the contact level. The perforating sheet metal projections 20 of sheet metal 18 . 19 be overlapping 28 on stiffening crooks 29 bent and fastened together. Through perforating sheet metal protrusions 20 In-situ concrete penetrates during the key phase of the assembly and, after solidification, anchors both sheets in the wall reinforcement set Zung.

Gypsum fiber boards 17 as non-combustible constructions Class A30 together with sheet steel 19 Form bottom layer of sandwich construction that meets all building physics requirements.

2. Composite construction ( 3 . 4 ).

used in many countries Trapezoidal profiles and cassette profiles made of galvanized sheets with thickness up to 2 mm and height 100-160 mm are most suitable for floor slabs.

The Steel trapezoidal sheets are becoming common in roll forming plants with exit widths up to 1.5 m in the form of three Trapezoidal waves made. Compound by longitudinal joints with blind rivets or screws up to transport-related width 3 m they design basic construction for component, although original Sheet metal bandwidth allows Production without longitudinal thrust.

For separation (side-formwork) of in-situ concrete for the supporting wall during support, the trapezoidal profile is cut to uninterrupted bottom flange, welded to the separating plate 2 to upper girth and oblique webs ( 3a ) to create a reliable bond in weak cold cuts.

details 4 . 6 be between bottom 5 or 7 ( 3c , d) and upper strap hidden and when lifting through slits 13 pulled out ( 3b ). From above, a component connected to the rest of the construction is sheet steel 11 limited.

Use for dowelling protected from corrosion stainless or galvanized steelware 10 favors bonding steel sheets with very thin concrete layers.

3. Edge fixation with sharp, hideable holders 31 ( 5 ) for extended to almost horizontal project position of technical fabric enables production of reinforced thin plate of fine-grained mixture for commercial element or on construction site.

ACHIEVABLE ADVANTAGES

• 1. Significant reduction in dead weight in comparison to conventional Floor slabs up to 60-84 kg / sq.m. at cheap building materials and more economical Technology for Prefabrication and assembly.
• 2. Excellent soundproofing Properties of these bivalve constructions with a core made of open-cell rigid foam or air-trapeze profiles.
• 3. With the technical fabric are thin-walled non-corrosive bearing upper and lower plates produce, whole non-combustible construction reaches fire class F90.

DESCRIPTION OF EMBODIMENTS

1. First embodiment relates to the manufactured on a construction site construction of floor slab. For this one relies on shuttering skin 3 with spacers 2 enfierraduras 8th for lower lightweight concrete layers 5 ( 1 ). Small height device 11 on the edge of the supporting wall serves as a side formwork for concreting. Due to small height of ceiling layer 5 Large-scale concreting of every concrete transport journey is achieved, followed by continuous laying of rigid foam boards 6 , This creates necessary adhesion (adhesion) between fresh concrete and hard foam.

Analogously, upper layer 7 reinforced and concreted. The in-situ concrete 12 and reinforcement projections 8th . 9 connect supporting wall 4 and floor ceiling.

2. Same construction with projections as prefabricated part is produced in construction and needs only supports for assembly 14 at the end of the span.

3. The steel sheet 18 with openings 27 for loading and unloading as reinforcement and 19 as a bearing layer, from below with gypsum fiber boards 17 is stiffened, presents third embodiment.

Perforating protrusions 20 ( 2c ), simple pipe device 22 with round rod 23 for connection between prefabricated parts during assembly ( 2a ) and hid in pipes 24 lifting loops 25 with welded by fillet welds 27 with each other ribs 26 , Grind 25 , Pipe 24 , bottom sheet 19 ( 2d ) characterize important elements of construction.

Reliable connections between sheets 18 . 19 and core 6 on the one hand, adhesion, frictional forces and possible bolting (dowelling) 21 between concrete 7 and tin 18 on the other hand, guarantee load-bearing capacity for storey ceiling.

4. Main construction for economic floor slab is made of steel trapezoidal profiles 1 with bolted or pegged ( 10 ) upper 11 with slits 13 for hidden loading strap 4 . 6 and lower 8th Sheet metal, whereby to lower sheet are by steel goods 7 or 9 also gypsum fiber 5 or thin concrete slab 9 fasten ( 4a , b, c). You can upper concrete layer 12 either in construction enclose or on construction site together with support part, separated by sheet metal strip 2 fill with in-situ concrete.

5. Use of steel cassette profiles for analogous, produced in building projectile ceiling element is supported on edge plate 15 Fragment of two profiles on 4d shown.

Because of the large width approx. 60 cm of cassette profile, upper sheet metal is required 11 additional support in the middle by lattice girders consisting of a straight top bar and two diagonal zigzag bars (one of them is not visible on top) 4d because it is located at the rear in a straight line perpendicular to the A4-level paper). All bars 16 are made of concrete reinforcement and joined together by spot welding and to cassette profiles.

In this construction are for separating plate 2 in addition to margins only trim webs of cassette profiles and super-small upper belts, which serve only for longitudinal joint between adjacent profiles. In addition, create underbelts 15 Continuous supporting sheet metal to which gypsum fiber boards or concrete slabs are attached.

This construction also needs no tabs for loading and unloading, because lifting hooks through small openings in Oberbiech 11 be connected directly to specific lattice girder nodes.

6th Multiple kinked in the transverse direction and rolled on a transportable Drum in the longitudinal direction soft or unlimited deformable fabric (membrane) of filament yarn has large dimensions, sufficient for coverage of need Spans.

First, a fabric is stretched in four corners in diagonal directions and on square brackets 31 ( 5a ) and then fixed on intermediate holders. Other fabric part 30 is arranged along the sides of formwork and stored above the upper edge. After concreting and vibration is on fresh concrete flat hard foam core 6 (for prefabricated elements in sandwich construction) or air-held steel core 33 with outer sheets 11 (for prefabricated element in composite construction) stored.

After solidification of concrete, the holders become 31 in hiding room 34 sink, lateral shuttering edges 32 turned outward and taken out part-ready element.

Then one repeats production of another layer with fabric reinforcement and immediately reverse part-ready element (with core from below) stored on new fresh concrete surface.

For clamped connection between component and in-situ concrete 12 and thereby reduced requested deflection becomes laterally glued vertical sheet 35 he wishes.

Manufactured component with accurately packed excellent fabric edges is transported to site and there by in-situ concrete 12 and these edges as a ring anchor in the supporting wall 4 set in concrete ( 5b , c).

Claims (11)

The floor slab with two thin upper and lower layers, characterized in that it can be executed in sandwich or composite construction and guaranteed by this two-bleach with super-light weight required sound insulation. In sandwich construction, it consists of two layers of reinforced lightweight concrete 5 . 7 ( 1 ) / or two layers of sheet steel 18 with outer concrete slab 7 from above and sheet steel 19 with gypsum fiber board 17 or concrete slab from below ( 2 ) and core 6 made of open-cell foam. The floor slab with layers 5 . 7 according to claim 1, characterized in that for your concreting and separation of wall part in the presence of interfering projections (formwork by reinforcement) special removable devices 11 used. In addition, the core layer can 6 small individual openings for concrete 15 and reinforcement between ceiling layers 5 and 7 ( 1b ) or outstanding in concrete steelware 16 ( 1a ) to additionally stiffen adhesion compounds. The floor slab with steel sheets 18 and 19 ( 2c ) according to claim 1, characterized in that these sheets perforating projections 20 connected to each other with overlap 28 and require stiffening to preserve the mold in case of in-situ concreting 29 contained and serve as sheet metal anchors within in-situ concrete. The floor slab according to claim 3, characterized in that both steel sheets to foam core 6 stick and to concrete slabs 7 and gypsum fiber boards 17 with stainless steel goods 24 get connected. For better adhesion with core can sheets 18 . 19 also be perforated within span. The floor slab according to claim 3 characterized gekennzeicnet that your adjacent elements with welded to sheet metal pipes 22 by common rod 23 to adjust. The floor slab according to claim 3 characterized gekennzeicnet that for loading your element stiffening with ribs 26 and welded to lower steel sheet 19 short tube 24 where has hidden loops 25 located. The floor slab in composite construction according to claim 1, characterized in that your structure consists of trapezoidal profile 1 with separated by stripes 2 Support parts and two sheets 11 and 8th creating two uninterrupted surfaces ( 3 . 4 ). The floor slab in composite construction according to claim 1, characterized in that all other structural parts, namely concrete and gypsum fiber boards 12 . 5 . 9 are responsible only for fire and corrosion protection and with stainless steel goods 10 . 7 to sheets 11 . 8th connected. The floor slab in composite construction according to claim 1, characterized in that for loading hidden tab 4 . 6 when lifting through slot 13 be gutted and after lowering the slot 13 against ingress of in-situ concrete layer 12 covered. The floor slab in composite construction according to claim 1, characterized in that the inner steel part of the component from connected to each other cassette sections, supporting grid 16 from reinforcement, separating plates 2 and upper sheet metal 11 consists ( 4d ). The floor slab according to claim 1, characterized in that its thin-walled outer panels of concrete, gypsum or plaster concrete with unwound from a drum and extended in diagonal directions free from corrosion technical textiles (fabric nets) of filament yarn are reinforced. The tissues 30 is fixed on rims on edges by construction and its edges are for anchoring in in-situ concrete 12 used ( 5 ).