EP0165222A2 - Elément en béton pour plancher structurel - Google Patents
Elément en béton pour plancher structurel Download PDFInfo
- Publication number
- EP0165222A2 EP0165222A2 EP85850206A EP85850206A EP0165222A2 EP 0165222 A2 EP0165222 A2 EP 0165222A2 EP 85850206 A EP85850206 A EP 85850206A EP 85850206 A EP85850206 A EP 85850206A EP 0165222 A2 EP0165222 A2 EP 0165222A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- slab
- lower layer
- density
- lightweight aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
Definitions
- the present invention relates to a concrete element for constructing a structural floor, said element comprising a prefabricated concrete base slab supporting the reinforcement of the element, and a concrete slab cast onto said base plate.
- filigree slab which, in accordance with the above, is used as a base slab in the construction of a structural floor, is mounted in position on the building site, whereupon a layer of concrete is cast upon it.
- the base slab supports a reinforcement projecting from the upper surface of the base slab for engaging with the cast-on slab.
- the filigree slab serves as a permanent shuttering, whereby the formwork is simplified considerably and striking is eliminated so that shorter building times are made possible.
- the construction of a structural floor by means of a concrete element which consists of a filigree slab and a cast-on concrete slab disposed thereon on the building site thus brings considerable advantages.
- the said cast-on slab consists of a layer of concrete, the thickness of the layer and the type of concrete being selected in dependence upon, inter alia, the span.
- the concrete must have a compressive strength sufficient to withstand the compression stress to which the concrete element will be subjected, for which reason there has been selected, according to prior art technique, a high-density concrete resistant to compression stress for the entire cast-on slab. For large spans, about 10 metres and more, the prior art technique therefore brings the disadvantage that the concrete element will sag because of its own heavy weight.
- the cast-on slab comprises an upper layer of concrete having a compressive strength of at least 30 MPa (after 28 days) and a density of at least 2,300 kg/m 3 , and a lower layer of lightweight aggregate concrete having a density of 600-800 kg/m 3 .
- the lightweight aggregate concrete of the lower layer preferably has a compressive strength of about 4 MPa (after 28 days) and a density of 650-750 kg/m 3 .
- the lightweight aggregate concrete of the lower layer preferably consists of ready-mixed silica concrete containing an aggregate of polystyrene balls.
- the concrete element shown in the drawing is intended to be used in the construction of a structural floor.
- the concrete element has a base slab 1 which consists of a so-called filigree slab of known type, i.e. a prefabricated concrete slab supporting the reinforcement 2 of the concrete element.
- the reinforcement 2 consists of a reinforcing netting 2a and three reinforcing girders 2b extending in the longitudinal direction of the concrete element.
- the reinforcing girders 2b are connected to the reinforcing netting 2a and project from the upper surface of the base slab 1.
- the reinforcement 2 may also comprise a number of prestressing wires (not shown) extending parallel to the girders 2b.
- the concrete element has a cast-on slab 3 which consists of a lower layer 4 of lightweight aggregate concrete and an upper layer 5 of pressure resistant concrete.
- the two layers 4 and 5 are cast onto the prefabricated base slab 1 after this has been mounted in position on the building site.
- the lightweight aggregate concrete of the lower layer 4 preferably is ready-mixed lightweight aggregate concrete containing cement, sand, lightweight aggregate in the form of polystyrene balls, and silica, and has a density of 600-800 kg/m 3 , preferably 650-750 kg/m 3 , and a compressive strength of about 4 MPa (after 28 days).
- the concrete of the upper layer 5 preferably is a ready-mixed concrete having a compressive strength of at least 30 MPa (after 28 days) and a density of at least 2,300 kg/m 3
- the concrete element according to the present invention thus consists of a known so-called filigree slab 1 and a cast-on slab 3 comprising two layers 4 and 5, whereby a partly prefabricated sandwich structure for constructing a structural floor is formed.
- the compressive strength of the upper layer 5 is adapted to the maximum compression stress to which the cross-section of the cast-on slab may be subjected and which occurs in the upper part of the cross-section, i.e. in the upper layer 5. Since the compression stress is considerably lower in the underlying parts of the cross-section, a concrete having a considerably lower compressive strength and, thus, a lower density may be utilised in the lower layer 4. In this manner, the concrete element according to the present invention will be much lighter than prior art concrete elements of this type, and therefore the concrete element according to the invention can be utilised also with large spans without sagging.
- the concrete element according to the invention has a width of 1.2 metre and a length of about 10 metres, while the base slab 1, the lower layer 4 and the upper layer 5 have an approximate thickness of, respectively, 7 cm, 16 cm and 5 cm.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Panels For Use In Building Construction (AREA)
- Floor Finish (AREA)
- Rolling Contact Bearings (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8403220A SE8403220L (sv) | 1984-06-15 | 1984-06-15 | Betongelement for berlag |
SE8403220 | 1984-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0165222A2 true EP0165222A2 (fr) | 1985-12-18 |
EP0165222A3 EP0165222A3 (fr) | 1988-01-13 |
Family
ID=20356248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85850206A Withdrawn EP0165222A3 (fr) | 1984-06-15 | 1985-06-14 | Elément en béton pour plancher structurel |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0165222A3 (fr) |
DK (1) | DK270985A (fr) |
FI (1) | FI852385L (fr) |
NO (1) | NO852408L (fr) |
SE (1) | SE8403220L (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2660345A1 (fr) * | 1990-03-27 | 1991-10-04 | Moulet Jean | Dalle de plancher sandwich a isolation perfectionnee. |
NL2003247C2 (nl) * | 2009-07-20 | 2011-01-24 | Aan De Stegge Roosendaal V O F | Betonnen sandwich leidingvloersysteem. |
EP2107180A3 (fr) * | 2008-04-04 | 2011-04-20 | Riccardo Valente | Élément de béton précontraint, adapté pour fournir des surfaces extérieures pour piétons et des revêtement de murs, et procédé de production associé |
AU2005244578B2 (en) * | 2004-12-16 | 2012-03-15 | The Austral Brick Company Pty Ltd | Reinforced cementitious material product and method of manufacture of the same |
NO20161845A1 (en) * | 2016-06-14 | 2017-12-15 | Polybo As | A building structure connecting means and a method of using same |
US11242689B2 (en) | 2018-03-29 | 2022-02-08 | Bailey Metal Products Limited | Floor panel system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT301131B (de) * | 1970-10-30 | 1972-08-25 | Josef Weidinger | Dach- und Deckendiele |
US3870553A (en) * | 1970-07-08 | 1975-03-11 | Domtar Ltd | Cellular concrete unit coated with air permeable, water repellent concrete coating |
FR2259954A1 (en) * | 1974-02-04 | 1975-08-29 | Kunz Alfred & Co | Prefabricated concrete sandwich slab - has lightweight layer between two heavy layers poured successively |
GB2142674A (en) * | 1983-07-04 | 1985-01-23 | Elkem As | Reinforced concrete building elements |
-
1984
- 1984-06-15 SE SE8403220A patent/SE8403220L/xx not_active Application Discontinuation
-
1985
- 1985-06-14 DK DK270985A patent/DK270985A/da not_active Application Discontinuation
- 1985-06-14 NO NO852408A patent/NO852408L/no unknown
- 1985-06-14 EP EP85850206A patent/EP0165222A3/fr not_active Withdrawn
- 1985-06-14 FI FI852385A patent/FI852385L/fi not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3870553A (en) * | 1970-07-08 | 1975-03-11 | Domtar Ltd | Cellular concrete unit coated with air permeable, water repellent concrete coating |
AT301131B (de) * | 1970-10-30 | 1972-08-25 | Josef Weidinger | Dach- und Deckendiele |
FR2259954A1 (en) * | 1974-02-04 | 1975-08-29 | Kunz Alfred & Co | Prefabricated concrete sandwich slab - has lightweight layer between two heavy layers poured successively |
GB2142674A (en) * | 1983-07-04 | 1985-01-23 | Elkem As | Reinforced concrete building elements |
Non-Patent Citations (1)
Title |
---|
BETONKALENDER; TASCHENBUCH F]R BETON-, STAHLBETON- UND SPANNBETONBAU SOWIE DIE VERWANDTEN F[CHER, vol. 65, Part 1, Ernst & Sohn, Berlin, DE * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2660345A1 (fr) * | 1990-03-27 | 1991-10-04 | Moulet Jean | Dalle de plancher sandwich a isolation perfectionnee. |
AU2005244578B2 (en) * | 2004-12-16 | 2012-03-15 | The Austral Brick Company Pty Ltd | Reinforced cementitious material product and method of manufacture of the same |
EP2107180A3 (fr) * | 2008-04-04 | 2011-04-20 | Riccardo Valente | Élément de béton précontraint, adapté pour fournir des surfaces extérieures pour piétons et des revêtement de murs, et procédé de production associé |
NL2003247C2 (nl) * | 2009-07-20 | 2011-01-24 | Aan De Stegge Roosendaal V O F | Betonnen sandwich leidingvloersysteem. |
NO20161845A1 (en) * | 2016-06-14 | 2017-12-15 | Polybo As | A building structure connecting means and a method of using same |
NO342700B1 (en) * | 2016-06-14 | 2018-07-09 | Polybo As | A connection means of a building structure and a method of using same |
US11242689B2 (en) | 2018-03-29 | 2022-02-08 | Bailey Metal Products Limited | Floor panel system |
Also Published As
Publication number | Publication date |
---|---|
DK270985A (da) | 1985-12-16 |
SE8403220L (sv) | 1985-12-16 |
NO852408L (no) | 1985-12-16 |
SE8403220D0 (sv) | 1984-06-15 |
EP0165222A3 (fr) | 1988-01-13 |
FI852385A0 (fi) | 1985-06-14 |
DK270985D0 (da) | 1985-06-14 |
FI852385L (fi) | 1985-12-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19880714 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: OESTERBERG, THOMAS |