EP3704324A1 - Procede de construction comprenant la realisation d'au moins une dalle en beton et en bois non precontrainte, et dalle en beton et en bois - Google Patents
Procede de construction comprenant la realisation d'au moins une dalle en beton et en bois non precontrainte, et dalle en beton et en boisInfo
- Publication number
- EP3704324A1 EP3704324A1 EP18803750.1A EP18803750A EP3704324A1 EP 3704324 A1 EP3704324 A1 EP 3704324A1 EP 18803750 A EP18803750 A EP 18803750A EP 3704324 A1 EP3704324 A1 EP 3704324A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slab
- concrete
- stiffeners
- wood
- ribs
- 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.)
- Granted
Links
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
- E04B5/17—Floor structures partly formed in situ
- E04B5/18—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly cast between filling members
-
- 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
- CONSTRUCTION PROCESS COMPRISING THE PRODUCTION OF AT LEAST ONE CONCRETE SLAB AND NON-PRECONTRATED WOOD, AND CONCRETE SLAB AND WOOD
- the present invention relates to the technical field of building construction, and more particularly to the reinforced concrete construction.
- the cast in place has the disadvantage of the time and the manpower necessary for its implementation.
- a long time is essential for the drying of the concrete before the construction of an upper floor can be started.
- the existing hollow core slabs have an unattractive appearance.
- these hollow slabs do not allow easy integration of reservations for water pipes, ventilation, electrical cables etc.
- the use of hollow core slabs is generally limited to industrial buildings or car parks. Thus, there is the need to adapt slabs to use for housing and offices.
- DE 102004059590 discloses a method of constructing a ceiling, comprising hollow bodies for lightening the construction.
- the hollow bodies are an inverted U shape or a wavy form.
- the hollow bodies can be metal, plastic, wood, chipboard or corrugated board.
- the hollow bodies leave voids in the slab, which is not entirely satisfactory in terms of mechanical strength, and acoustic and thermal performance. When workers walk on the site, they may deform the hollow bodies, before their recovery by a compression slab.
- GB1401439 discloses a method of building a slab, comprising lightweight blocks for lightening the construction.
- the blocks at the ends of the slab are provided with a height less than that of the blocks located between the ends.
- the blocks can be polystyrene, wood wool, metal or cardboard.
- Polystyrene is not entirely satisfactory in terms of mechanical strength and ecological footprint.
- the metal is not entirely satisfactory in terms of cost, ecological footprint, and acoustic and thermal performance.
- Wood wool and cardboard are not entirely satisfactory in terms of mechanical strength, acoustic and thermal performance.
- One of the aims of the invention is therefore to propose an improved method of construction, the method comprising the production of at least one slab of concrete and wood.
- the slab resulting from the process must be aesthetic, resistant, easy to install, environmentally friendly to produce, and have good acoustic and thermal performance.
- Another object of the invention is to facilitate the integration of reservations for conduits and cables, and thus allow the use of the method according to the invention in the construction of buildings, including housing.
- the subject of the invention is a method of construction, comprising the production of at least one slab according to the following steps:
- the invention also relates to a concrete and wood slab, characterized in that it comprises:
- the method comprises, prior to the casting of the concrete slab, a step of identifying areas of interference between, on the one hand, the ribs, and on the other hand, reservations provided in the slab.
- the metal stiffeners associated with the ribs outside the interference zones are laid with a reference difference between them.
- the metal stiffeners associated with the ribs in the zones of interference are placed in offset with the reference difference, to avoid said interferences.
- the reference difference between the metal stiffeners is of the order of 60 cm, while the offset is of the order of 10 cm from one side or the other.
- the method comprises additional steps: laying of the slab consisting of the slab, stiffeners, wood loaves and ribs that integrate the stiffeners and are secured to the dallette; then pouring a slab of compression above the slab by covering the wooden loaves and the ribs.
- the wooden loaves have a density of between 80 and 200 kg / m3.
- the wooden loaves have a density of between 120 and 140 kg / m3.
- the pl-p3 wooden breads have a thermal conductivity of between 0.038 and 0.044 W / (mK).
- the wooden loaves are made of wood fibers.
- the wood loaves are cut from single-ply wood fiber insulation boards.
- the stiffeners are embedded only partially in the concrete and emerge at the top of the ribs.
- the cutting of the wood loaves can be done by water jet or by any other system.
- the concrete slab has a thickness of 6 cm.
- the slab has a length of up to 7.5m.
- the slab has a width of up to 3.8m.
- the finished floor has a thickness of 23 centimeters for spans from 6m51 to
- the finished floor has a thickness of 20 centimeters for spans up to 6m50.
- the slab can support the weight of the concrete poured on site (compression slab), give to the complex of the floor (slab concrete, breads of wood, concrete of the compression slab (poured on site)) good acoustic and thermal performance, and have a very favorable balance sheet in terms of C02 emissions. Workers can walk on the slab on site, without the risk of deforming it, before the casting of the compression slab.
- the wooden loaves can support the weight of the workers without being deformed, which would not be the case with hollow elements or light materials. This facilitates the establishment of networks (electrical, fluids, etc.). BRIEF DESCRIPTION OF THE DRAWINGS
- Figure 1 is a sectional view of the slab obtained by the method according to the invention
- Figure 2 is a schematic representation in perspective of the slab with the stiffeners, before the laying of the wood rolls;
- Figure 3 is a layout plan having interfering zones between ribs and reservations, said interference can be avoided by the use of the slab according to the invention
- Figure 4 is a plane similar to Figure 3, but with the ribs displaced to avoid interference;
- Fig. 5 is a layout plan showing an area in which a slab with the reference gap between ribs can be used
- the invention relates to a method of construction, comprising the production of at least one slab 1 of reinforced concrete and wood, called slab BB.
- slab BB reinforced concrete and wood
- the slab 1 is composed of a slab 2, metal stiffeners 3 embedded in the concrete, ribs ni and n2 protruding from the slab 2, and wood rolls pl p3 arranged between the ribs ni and n2.
- compression slab an upper layer of concrete, called compression slab (not shown), is poured on the slab 1.
- the pl-p3 wood rolls have a density of between 80 and 200 kg / m 3, preferably between 120 and 140 kg / m 3.
- the pl-p3 wooden rolls have a thermal conductivity of preferably between 0.036 and 0.046 W / (m), preferably between 0.038 and 0.044 W / (mK).
- the pl-p3 wood buns are preferably made of wood fibers. Even more preferably, the pl-p3 wood buns are obtained from single-layer insulating panels, rigid or semi-rigid, made of wood fibers.
- the panels may have a thickness of between 3 and 22 cm, preferably equal to 9 or 12 cm.
- the panels have fire behavior corresponding to class E, according to EN 13501-1.
- a major problem with existing hollow core slabs is their lack of adaptability. Indeed, they are difficult to use to build housing or offices whose plans are very diverse, and require to accept a large number of reservations for water pipes, gas, ventilation, as well as for electrical cables , telecommunication, etc.
- a preliminary step consists in identifying on the layout plane areas where a (virtual) collision occurs between the ribs and the reservations.
- interference zone ZI has collisions (see Figure 3).
- a first interference zone ZI is identified between the rib ni and the reservation rl, and a second interference zone ZI between the rib n5 and the reservation r3.
- the displacement of the ribs by a maximum of 10 cm compared to the reference deviation makes it possible to escape the reservations (see Figure 4).
- a slab 1 with ribs ni and n5 offset from the reference gap can be implemented.
- the third type of zone designates the conflict zones ZC, where the displacement of ribs up to 10 cm does not prevent collisions. This is the case of the collision between rib nl2 and reservation r8, the displacement of which would cause a collision with reservation r9.
- a floor must be cast in place, or be formed of conventional predalles, without ribs or integrated insulation.
- the method of manufacturing the slab 1 according to the invention comprises the following steps:
- slab 2 has a thickness of 6 cm.
- its length can reach 7.5 m, and its width can reach 3.8 m.
- the stiffeners comprise vertical elements 3a and horizontal elements 3b.
- the elements 3a protrude from the slab 2, while the elements 3b are fully integrated with the slab 2.
- the vertical elements 3 has stiffeners 3 are placed either with the reference difference between them (preferably 60 cm), with a deviation greater or less than the reference deviation, to avoid ZI interference zones.
- the cut p3 wood rolls may have a width of 48 cm, and a height of 9 or 12 cm.
- the length of the woodwinds pl p3 cut depends in particular on the length of the slab 1 to achieve.
- each slab 1 consisting of slab 2, stiffeners 3, wood rolls pl to p3 and ribs ni and n2, which integrate the vertical elements 3a of the stiffeners 3 and are secured to slab 2.
- a floor may be composed of a plurality of adjacent slabs 1, and thus the casting of the compression slab may be performed simultaneously for several slabs 1.
- Steps 1) to 6) are preferably performed off-site, for example in the factory, while steps 7) and 8) are performed on the job site.
- the number of operations carried out on the site is minimized.
- steps 1) and 2) in the factory while steps 3) to 8) are performed on the job site.
- the invention makes it possible to improve the C0 2 balance sheet of the slab 1. This improvement is permitted thanks to the lightening of the slab 1, which is no longer a solid slab.
- the pl-p3 breads reduce the use of primary materials by more than 35%, while retaining the original lift, according to the experiments that led to the invention.
- the pl-p3 wooden breads make it possible to further improve the C02 balance of slab 1, which, potentially, can be zero or even positive.
- the pl-p3 wooden breads also increase the thermal and acoustic insulation of slab 1.
- Pl-p3 woodwool has good fire resistance compared to polystyrene, wood wool or cardboard.
- the pl-p3 wooden breads also have good moisture resistance properties, compared to wood wool or cardboard.
- electric pots can be integrated directly to the slab 2, being put in place before casting slab 2.
- the construction method according to the invention is particularly fast and simple to implement, minimizing the necessary operations on the site.
- the length of the slab 1 may be less than or equal to 7.5 m.
- slab 1 can be laid over a maximum span of 7.5 m.
- the slabs 1 and the construction may be shaped differently from Figures 1 to 6 without departing from the scope of the invention.
- the technical characteristics of the various embodiments and variants mentioned above may be, in whole or in part, combined with one another.
- the slab 1 can be adapted in terms of cost, functionality and performance.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Road Paving Structures (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1760253A FR3072986B1 (fr) | 2017-10-30 | 2017-10-30 | Procede de construction comprenant la realisation d'au moins une dalle en beton et en bois non precontrainte, et dalle en beton et en bois |
| PCT/FR2018/052675 WO2019086791A1 (fr) | 2017-10-30 | 2018-10-26 | Procede de construction comprenant la realisation d'au moins une dalle en beton et en bois non precontrainte, et dalle en beton et en bois |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3704324A1 true EP3704324A1 (fr) | 2020-09-09 |
| EP3704324C0 EP3704324C0 (fr) | 2023-12-06 |
| EP3704324B1 EP3704324B1 (fr) | 2023-12-06 |
Family
ID=61027896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18803750.1A Active EP3704324B1 (fr) | 2017-10-30 | 2018-10-26 | Procede de construction comprenant la realisation d'au moins une dalle en beton et en bois non precontrainte, et dalle en beton et en bois |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3704324B1 (fr) |
| FR (1) | FR3072986B1 (fr) |
| WO (1) | WO2019086791A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3118081A1 (fr) | 2020-12-22 | 2022-06-24 | A2C Materiaux | Procédé de construction comprenant la réalisation d’au moins une dalle en béton et en bois non précontrainte, et dalle en béton et en bois |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2260425A (en) * | 1938-04-21 | 1941-10-28 | John J Widmayer | Plastic floor or roof |
| GB1401439A (en) * | 1971-11-01 | 1975-07-16 | Omnia International Building S | Floor constructions |
| DE102004059590A1 (de) * | 2004-12-09 | 2006-06-22 | Manfred Kaul | Deckensystem mit werkseitig eingelegten und gegen Auftrieb gesicherten Hohlkörpern aus verschiedenen Materialien untergeordneter Bedeutung |
-
2017
- 2017-10-30 FR FR1760253A patent/FR3072986B1/fr active Active
-
2018
- 2018-10-26 EP EP18803750.1A patent/EP3704324B1/fr active Active
- 2018-10-26 WO PCT/FR2018/052675 patent/WO2019086791A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3072986B1 (fr) | 2021-01-08 |
| EP3704324C0 (fr) | 2023-12-06 |
| EP3704324B1 (fr) | 2023-12-06 |
| FR3072986A1 (fr) | 2019-05-03 |
| WO2019086791A1 (fr) | 2019-05-09 |
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