Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
  • E04B2/84—Walls made by casting, pouring, or tamping in situ
  • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
  • E04B2/8605—Walls made by casting, pouring, or tamping in situ made in permanent forms without spacers
• • 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
  • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
  • E04C2/049—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres completely or partially of insulating material, e.g. cellular concrete or foamed plaster

Definitions

• the present invention relates to a formwork element lost in the form of a concrete board.
• the present invention aims to provide a concrete board for formwork which retains the advantages of using wooden boards - lightness, possibility of sawing on site by hand or by machine - while having the characteristics necessary to advantageously be able to be left in place after pouring the concrete.
• the board is made of light insulating concrete reinforced mechanically by a skin reinforcement on at least one of its faces.
• Light insulating concrete is made from a mixture of hydraulic binders, polystyrene beads and water.
• the adhesion between the polystyrene beads and the paste is improved by the use of protein-based adjuvants of animal origin.
• the adjuvant used is atomized cruor at a rate of 1% of the weight of binder. The cruor can be replaced by liquid blood stabilized by the bacterial route, the dosage then being approximately 5% of the weight of hydraulic binder.
• the boards are manufactured to the desired dimensions by compression, vibration or other known process such as rolling, spinning or extrusion for example.
• the thickness of the boards is at least equal to 3 cm and can go up to 10 cm, a typical thickness being about 5 cm and the width is at least equal to 10 cm and can go up to a maximum lm, a typical width being about 20 cm.
• the length of the boards is determined according to requirements.
• the product obtained is particularly light.
• the density can vary between 300 kg / m and 800 kg / m 3 , or even 1,000 kg / m 3 .
• the mechanical reinforcement of the boards is carried out by means of a skin covering placed on one or both sides.
• This skin covering is for example produced in the form of a trellis made of mineral fibers (glass) or vegetable fibers (linen) placed in a cement slip or hydraulic binders.
• the boards manufactured as indicated above have mechanical properties largely sufficient for the envisaged application.
• a compressive strength greater than 1 MPa (10 bar) and a tensile strength by bending greater than 3 MPa (30 bar) (with skin reinforcements on both sides) can easily be achieved.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Laminated Bodies (AREA)
• Moulds, Cores, Or Mandrels (AREA)
• Curing Cements, Concrete, And Artificial Stone (AREA)
• Dry Formation Of Fiberboard And The Like (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9289726

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

Family Cites Families (4)

• 1983
  • 1983-06-13 FR FR8309750A patent/FR2547338B1/fr not_active Expired
• 1984
  • 1984-06-07 EP EP84401179A patent/EP0128832A3/de not_active Withdrawn
  • 1984-06-12 ES ES533334A patent/ES8600449A1/es not_active Expired

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