WO1983003276A1 - Procedure for manufacturing a compound slab - Google Patents
Procedure for manufacturing a compound slab Download PDFInfo
- Publication number
- WO1983003276A1 WO1983003276A1 PCT/FI1983/000025 FI8300025W WO8303276A1 WO 1983003276 A1 WO1983003276 A1 WO 1983003276A1 FI 8300025 W FI8300025 W FI 8300025W WO 8303276 A1 WO8303276 A1 WO 8303276A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slab
- concrete
- manufacturing
- steel sheet
- mould
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/0062—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects forcing the elements into the cast material, e.g. hooks into cast concrete
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/28—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups combinations of materials fully covered by groups E04C2/04 and E04C2/08
Definitions
- the present invention concerns a procedure for manufacturing a compound structure as specified in claim 1 for load-bearing horizontal structural parts of buildings, such as base floors, intermediate floors and ceilings.
- compound slabs are previously known in itself, since by combining different materials - most usually steel and concrete - is achieved advantageous utilization of the material's properties. Also known is the manufacturing of a compound slab in that a corrugated steel sheet is combined with concrete poured thereupon, by means of dowels cut out by machine means from every second wave-trough of the sheet (e.g. the Homecon compound slab).
- the material utilization is not optimized: the concrete enclosed within the folds is nearly stress-free, thereby unnecessarily adding to the structure's proper weight and causing unnecessary costs.
- the said structure is in fact best appropriate for slabs which are concreted on the site, because it is simple to produce, the corrugated sheet also serving as mould.
- a wall slab manufacturing method is also known (German application print No. 2415 647) wherein the element has been manufactured by first pouring the concrete in a mould and pressing into it, close to the surface, a corrugated steel sheet provided with reinforcement rods. These reinforcement rods are affixed to the steel sheet by clamps in manual work, and therefore the manufacturing is complicated and expensive.
- a slab of this type is not intended to stand up to the loads occurring in intermediate floors because the concrete layer is comparatively thin.
- the invention to be disclosed here is characterized in that it is made in a mould, advantageously in a horizontal mould, upside down.
- a concrete layer of requisite thickness On the bottom of the mould is poured a concrete layer of requisite thickness. While the concrete is still pliable, on top of it is lowered a corrugated sheet with mechanically punched-out spikes having a length preferably equal to the thickness of the slab.
- the corrugated sheet is pressed down so that the spikes bear on the bottom of the mould, and the concrete is allowed to harden.
- the slab is inverted so that the concrete slab will constitute the top surface of the compound slab.
- this construction affords the advantage of lesser material consumption, and thereby lower manufacturing, transport and installation costs. Since the thickness of the concrete slab can be minimized, greater speed is also achieved in the mould turnover as a result of shorter heating periods. Another advantage is that the floor surface meant to be smooth is poured against the mould, whereby no grinding is required. The mould may also be provided with sides producing the required marginal shapes. It is an important advantage that in the upside down manufacturing the required pre-camber is achievable by a simple technique, for instance with the aid of weights of suitable magnitude.
- Fig. 1 presents a corrugated steel sheet from which tongues have been punched out
- Fig. 2 shows the slab of the invention viewed from the side; this figure reveals the favourable size of the tongues;
- Fig. 3 illustrates the pressing of the steel sheet into the concrete
- Fig. 4 presents a slab manufactured by the procedure of the invention.
- the slab is manufactured as follows.
- tongues 2 From a corrugated steel sheet 1 (Fig. 1 ) tongues 2 have been punched out. Their size and number depend on the intended use of the structure, on the load, span, type of profile, etc. and usually have to be determined by calculation. Their length is preferably the same as the thickness of the concrete slab because then the corrugated sheet will be positioned at the correct height upon the concrete slab when it is pressed on.
- a conventional, smooth mould made of plywood or another suitable material is poured concrete mix 3 (Fig. 2), which is furnished, if necessary, with transverse steel reinforcement or with steel netting reinforcement.
- This mould may have sides by means of which the desired marginal shapes 4 are produced; it may be curved so that a pre-canber is obtained, and it may comprise apparatus 5 by the aid of which the sheet is pressed to be in contact with the bottom of the mould and by which the corrugated sheet is pressed to arcuate shape consistent with the pre-camber (Fig. 3).
- the mould may also comprise apparatus by means of which on the slab are produced concrete beams strengthening the shearing capacity.
- Any method known in the art may be used to accelerate the curing of the concrete, advantageously also infra-red heating, because the mass to be heated is fairly minor.
Abstract
A load-bearing compound slab which has been manufactured by combining a corrugated steel sheet (1) by means of dowels (2) with a concrete slab, and the procedure for manufacturing such a structure. Compared with a standard compound slab of prior art, the manufacturing method differs in that the slab is poured upside down, that the spikes of the steel sheet are pressed into the concrete mix in the mould before its hardening. In this way is obtained a structure in which the material utilization is more advantageous than in any problem solution known heretofore, and thereby savings are gained in the manufacturing, transporting and installation costs.
Description
Procedure for manufacturing a compound slab
The present invention concerns a procedure for manufacturing a compound structure as specified in claim 1 for load-bearing horizontal structural parts of buildings, such as base floors, intermediate floors and ceilings.
The use of compound slabs is previously known in itself, since by combining different materials - most usually steel and concrete - is achieved advantageous utilization of the material's properties. Also known is the manufacturing of a compound slab in that a corrugated steel sheet is combined with concrete poured thereupon, by means of dowels cut out by machine means from every second wave-trough of the sheet (e.g. the Homecon compound slab).
In a slab manufactured in the way just described, the material utilization is not optimized: the concrete enclosed within the folds is nearly stress-free, thereby unnecessarily adding to the structure's proper weight and causing unnecessary costs. The said structure is in fact best appropriate for slabs which are concreted on the site, because it is simple to produce, the corrugated sheet also serving as mould.
A wall slab manufacturing method is also known (German application print No. 2415 647) wherein the element has been manufactured by first pouring the concrete in a mould and pressing into it, close to the surface, a corrugated steel sheet provided with reinforcement rods. These reinforcement rods are affixed to the steel sheet by clamps in manual work, and therefore the manufacturing is complicated and expensive. However, a slab of this type is not intended to stand up to the loads occurring in intermediate floors because the concrete layer is comparatively thin.
The invention to be disclosed here is characterized in that it is made in a mould, advantageously in a horizontal mould, upside down.
On the bottom of the mould is poured a concrete layer of requisite thickness. While the concrete is still pliable, on top of it is lowered a corrugated sheet with mechanically punched-out spikes having a length preferably equal to the thickness of the slab. The corrugated sheet is pressed down so that the spikes bear on the bottom of the mould, and the concrete is allowed to harden. During transport to its final location in the building, the slab is inverted so that the concrete slab will constitute the top surface of the compound slab.
Compared with prior art, this construction affords the advantage of lesser material consumption, and thereby lower manufacturing, transport and installation costs. Since the thickness of the concrete slab can be minimized, greater speed is also achieved in the mould turnover as a result of shorter heating periods. Another advantage is that the floor surface meant to be smooth is poured against the mould, whereby no grinding is required. The mould may also be provided with sides producing the required marginal shapes. It is an important advantage that in the upside down manufacturing the required pre-camber is achievable by a simple technique, for instance with the aid of weights of suitable magnitude.
The invention is more closely described in the following with reference to the attached figures, of which
Fig. 1 presents a corrugated steel sheet from which tongues have been punched out;
Fig. 2 shows the slab of the invention viewed from the side; this figure reveals the favourable size of the tongues;
Fig. 3 illustrates the pressing of the steel sheet into the concrete;
Fig. 4 presents a slab manufactured by the procedure of the invention.
The slab is manufactured as follows.
From a corrugated steel sheet 1 (Fig. 1 ) tongues 2 have been punched out. Their size and number depend on the intended use of the structure, on the load, span, type of profile, etc. and usually have to be determined by calculation. Their length is preferably the same as the thickness of the concrete slab because then the corrugated sheet will be positioned at the correct height upon the concrete slab when it is pressed on.
Into a conventional, smooth mould made of plywood or another suitable material is poured concrete mix 3 (Fig. 2), which is furnished, if necessary, with transverse steel reinforcement or with steel netting reinforcement. This mould may have sides by means of which the desired marginal shapes 4 are produced; it may be curved so that a pre-canber is obtained, and it may comprise apparatus 5 by the aid of which the sheet is pressed to be in contact with the bottom of the mould and by which the corrugated sheet is pressed to arcuate shape consistent with the pre-camber (Fig. 3). The mould may also comprise apparatus by means of which on the slab are produced concrete beams strengthening the shearing capacity.
Any method known in the art may be used to accelerate the curing of the concrete, advantageously also infra-red heating, because the mass to be heated is fairly minor.
On accomplished curing of the concrete the mould is disassembled in conventional manner, the slab is inverted and conveyed into storage (Fig. 4).
Claims
1. The manufacturing of a compound structure consisting of a corrugated steel sheet (1) and a concrete slab (3), wherein the concrete is first poured into a mould, characterized in that the steel sheet (1), provided by punching with tongues (2), is pressed into the concrete before its hardening, the length of the tongues having been selected consistent with the concrete thickness so that the steel sheet (1) assumes a position at the correct height with reference to the bottom of the mould, carried by the points of the spikes.
2. Manufacturing procedure according to claim 1, characterized in that the slab can be given, if needed, a pre-camber which is appropriate in view of load, shrinkage or equivalent, by simply pressing upon it with the aid of simple weights.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI820890A FI64969C (en) | 1982-03-16 | 1982-03-16 | FOERFARANDE FOER FRAMSTAELLNING AV EN SAMMANSATT KONSTRUKTION |
FI820890820316 | 1982-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1983003276A1 true WO1983003276A1 (en) | 1983-09-29 |
Family
ID=8515203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1983/000025 WO1983003276A1 (en) | 1982-03-16 | 1983-03-16 | Procedure for manufacturing a compound slab |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0102994A1 (en) |
FI (1) | FI64969C (en) |
WO (1) | WO1983003276A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4555888A (en) * | 1982-12-06 | 1985-12-03 | Joseph Goldenberg | Preformed, reinforced structural panels and method of making same |
US5581969A (en) * | 1994-10-13 | 1996-12-10 | Kelleher; Stephen L. | Prefabricated building element |
WO1997017509A1 (en) * | 1995-11-09 | 1997-05-15 | Germix Oy | Composite slab, a profile plate thereof and a method for producing a composite slab |
EP1546484A2 (en) * | 2002-08-29 | 2005-06-29 | Thuan H. Bui | Lightweight modular cementitious panel/tile for use in construction |
EP2090415A1 (en) | 2008-02-18 | 2009-08-19 | Kp1 | Method for manufacturing a lattice girder |
CN106049747A (en) * | 2016-07-15 | 2016-10-26 | 中国矿业大学 | Honeycomb profiled steel sheet-concrete precast slab |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413645A1 (en) * | 1974-03-21 | 1975-09-25 | Bernhard Dr Ing Unger | Concrete and sheet metal combined slab - with battens protruding into concrete shaped to lock concrete and sheeting together |
DE2415647A1 (en) * | 1974-03-30 | 1975-10-16 | Guenter Semisch | Tall slab for high wall construction - of trapezoid steel sheet with corrugations fixed by reinforcing bars bedded in concrete |
DE2600662A1 (en) * | 1976-01-09 | 1977-07-21 | Westeel Rosco Ltd | Load bearing steel support concrete connection - with protruding interlocking peripheral fishplates angled alternately and embedded in concrete |
-
1982
- 1982-03-16 FI FI820890A patent/FI64969C/en not_active IP Right Cessation
-
1983
- 1983-03-16 EP EP83900932A patent/EP0102994A1/en not_active Withdrawn
- 1983-03-16 WO PCT/FI1983/000025 patent/WO1983003276A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413645A1 (en) * | 1974-03-21 | 1975-09-25 | Bernhard Dr Ing Unger | Concrete and sheet metal combined slab - with battens protruding into concrete shaped to lock concrete and sheeting together |
DE2415647A1 (en) * | 1974-03-30 | 1975-10-16 | Guenter Semisch | Tall slab for high wall construction - of trapezoid steel sheet with corrugations fixed by reinforcing bars bedded in concrete |
DE2600662A1 (en) * | 1976-01-09 | 1977-07-21 | Westeel Rosco Ltd | Load bearing steel support concrete connection - with protruding interlocking peripheral fishplates angled alternately and embedded in concrete |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4555888A (en) * | 1982-12-06 | 1985-12-03 | Joseph Goldenberg | Preformed, reinforced structural panels and method of making same |
US5581969A (en) * | 1994-10-13 | 1996-12-10 | Kelleher; Stephen L. | Prefabricated building element |
WO1997017509A1 (en) * | 1995-11-09 | 1997-05-15 | Germix Oy | Composite slab, a profile plate thereof and a method for producing a composite slab |
EP1546484A2 (en) * | 2002-08-29 | 2005-06-29 | Thuan H. Bui | Lightweight modular cementitious panel/tile for use in construction |
EP1546484A4 (en) * | 2002-08-29 | 2007-03-21 | Thuan H Bui | Lightweight modular cementitious panel/tile for use in construction |
US7493738B2 (en) | 2002-08-29 | 2009-02-24 | Bui Thuan H | Lightweight modular cementitious panel/tile for use in construction |
US7770354B2 (en) | 2002-08-29 | 2010-08-10 | Bui Thuan H | Lightweight modular cementitious panel/tile for use in construction |
EP2090415A1 (en) | 2008-02-18 | 2009-08-19 | Kp1 | Method for manufacturing a lattice girder |
FR2927565A1 (en) * | 2008-02-18 | 2009-08-21 | Kp1 Soc Par Actions Simplifiee | METHOD FOR MANUFACTURING A TREILLIS BEAM |
CN106049747A (en) * | 2016-07-15 | 2016-10-26 | 中国矿业大学 | Honeycomb profiled steel sheet-concrete precast slab |
Also Published As
Publication number | Publication date |
---|---|
FI64969C (en) | 1984-02-10 |
FI64969B (en) | 1983-10-31 |
EP0102994A1 (en) | 1984-03-21 |
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