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
  • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
  • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
  • E04B5/261—Monolithic filling members
  • E04B5/263—Monolithic filling members with a flat lower surface
• • 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
  • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
  • E04B5/28—Cross-ribbed floors
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
  • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
  • E04C5/065—Light-weight girders, e.g. with precast parts
  • E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts

Definitions

• This grilled lightweight concrete masonry ceiling solves the problem of casting flat slabs, roof slabs, stairs and similar structures.
• the structure can be erected manually without any supporting because the structure is selfbearing due to casting.
• the structure is of a grill type with a hidden compressive slab. Due to the prefabrication the structure is a camber.
• the ceiling block is produced as a final structural element.
• the final ceiling is covered by a thin mortar layer.
• the existing lightweight concrete systems which solve, to a certain extent, the mentioned technical task are (1) Ytong mixed masonry system, Portugal, Israel and Turkey, (2) Ytong prefabricated slab-plate system, applied in more than twenty European country, (3) Siporex prefabricated slab-plate system, similar like (2) (Europe), (4) Italgas prefabricated slab- plate system, similar like (2) (Europe).
• the main feature of this patent is the application of the principle of complete reinforcing of lightweight concrete or micro concrete to the prefabricated girders and lateral ribs of the grilled masonry ceiling structure. This principle enables an almost complete transfer of compressive, tensile and shear stresses into the reinforcement.
• the grill elements take the global force
• the ceiling block can be a structural member which takes the local loading without the commonly used compressive slab.
• Thin mortar layer cast over the block and grill system makes the system a compacted structure.
• the lightweight concrete body becomes a secondary structural medium for local and global stabilization and takes on the role of an anti-corrosive as well as protection against heat, noise and humidity.
• Drawing 1 shows cross-sections of the prefabricated girders, where O is a single reinforced type, D is a double reinforced type and S is a special reinforced type, .
• Drawing 2 shows a view of the girders, where the upper part of the drawing shows an O type girder, and the right lower part of the drawing shows a D type of girder, .
• Drawing 3 shows a cross-section of the ceiling structure, where the upper part shows a single placed girder, and the lower part shows a doubled placed girder, .
• Drawing 4 shows a longitudinal-section of the ceiling structure, .
• Drawing 5 shows a cross-sections of the three layered ceiling block , .
• Drawing 6 shows an axonometric view of the lower threshold and the upper threshold.
• the new grilled lightweight concrete masonry ceiling system as presented in Drawings 1-5 consists of the following elements: prefabricated steel-concrete girder (1), prefabricated lightweight concrete or micro concrete lower threshold (2), prefabricated lightweight ceiling block' single-layered or three-layered (3), lateral ribs, reinforced and made of lightweight concrete or micro concrete (4), prefabricated lightweight upper threshold (5), thin mortar layer made of cement or similar material (6); all these elements, by their forms and dimensions, form a compatible system.
• Prefabricated selfbearing girder (1) shows in Drawings 1 and 2, that variants (D) and (S) are cast with a partly welded steel reinforcement, whose bars are chosen according to the capacity and stability condition, which is protected by coating, if necessary.
• the reinforcing bar forms fourfold trusses (1.3) and (1.4), whose diagonal bars, depending on spans, are cast in X, V or N form, with cords strengthened by added bars (1.6) in the upper and (1.5) in the lower zone, which is not obligatory;
• the lower track ( 1 A ) and the body (1.2) are made of lightweight concrete whose compressive strength reaches 3.0 MPa, or micro concrete made of fine sand, with a size smaller than 8.0 mm, with a down edge curvilinear, in a quadratic parabola form or a similar form, and with a camber of //750 ⁇ ⁇ ⁇ //50 , where / is the span of the girder.
• the recommended girder distance B is 68- 79 cm and the lateral rib distance 79-129 cm.
• Prefabricated selfbearing girder (1) shown in Drawings 1 and 2, in variant (O) is similar to variant (D) while the difference consists in whether the reinforcing bar is formed in single or double trusses (1.3) and (1.4), with cords obligatory strengthened by added bars (1.6) in the upper and (1.5) in the lower zone.
• the prefabricated lower threshold (2) shown in Drawing 5 has a long parallelepiped form or a similar form, which is cast of lightweight concrete or micro-concrete and reinforced by at least one bar (2.1) whose edges project outside the parallelepiped and serve as a threshold support to the girder (1).
• Lightweight ceiling three-layered block (3) is shown in Drawings 3,4 and 5. Its dimensions and reinforcing bars are chosen according to: the bearing capacity of the ceiling, temperature protection, moisture and fire resistance; its bars are protected by coating if necessary.
• the first lightweight layer (3.1) is made of lightweight concrete with a density smaller than 1500 kg/m3 and a compressive strength reaching 2 MPa, it is reinforced by a wire or welded wire fabric (3.4), which have a notch (3.5) at the edge.
• the second nonbearing layer (3.2) is made of expanded polystyrene, mineral wool or similar super-light material or from lightweight concrete with a density smaller than 1000 kg/m3.
• the third layer (3.3) is made of lightweight concrete, which is not obligatory.
• the recommended dimensions are: length (B-dl) 45-65 cm, depth H 12-30 cm, bandwidth 20-50 cm.
• Lightweight ceiling single-layer block (3) is shown in Drawings 3,4 and 5. It is made of lightweight aerated concrete, foamed concrete, expanded polystyrene concrete or similar materials, whose mass density is smaller than 900 kg/m3 and compressive strength reaches 2 MPa, tensile bending strength reaches 0.2 MPa, formed as a parallelepiped with a notch at the edge (3.5), if quadratic or of a similar form. The recommended dimensions are similar as for a three layered-block.
• the lateral rib (4) is shown in Drawing 4.
• Its reinforcing bars are in the lower zone (4.2), the reinforcing bars in the upper zone (4.3), which is not obligatory; it is cast in situ by lightweight-concrete or micro-concrete in the space formed between the threshold and the ceiling block, which together with a girder (1) form a grill structure resistant to out-of-plane and in-plane loads, especially seismic loads.
• One of the possible methods for the production of a lightweight body of the girder (1), ceiling block (3) and lateral rib (4) is lightweight concrete based on the aggregate made as expanded polystyrene. If the lightweight concrete is made of the light expanded polystyrene aggregate, then the density should be higher than 800 kg/m3 if the elements are structural or exposed to any kind of fire load.
• the application of this patent in industry is evident.
• the proposed lightweight concrete masonry ceiling is applicable in practice as a new method for constructing various structures such as: flat slabs, roof slabs, stairs structures and similar, based on the system of prefabrication and connection derived from this patent.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Building Environments (AREA)
• Rod-Shaped Construction Members (AREA)
• Road Paving Structures (AREA)
• Reinforcement Elements For Buildings (AREA)
• Laminated Bodies (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10946595

Family Applications (1)

Country Status (11)

Cited By (6)

Citations (5)

Family Cites Families (1)

• 1997
  • 1997-06-19 HR HR970336A patent/HRP970336B1/xx not_active IP Right Cessation
• 1998
  • 1998-06-05 CZ CZ0438599A patent/CZ296749B6/cs not_active IP Right Cessation
  • 1998-06-05 SI SI9820038A patent/SI20166A/sl not_active IP Right Cessation
  • 1998-06-05 ME MEP-2008-832A patent/ME00510B/me unknown
  • 1998-06-05 RS YUP-669/99A patent/RS50149B/sr unknown
  • 1998-06-05 HU HU0003142A patent/HU223213B1/hu not_active IP Right Cessation
  • 1998-06-05 SK SK1700-99A patent/SK170099A3/sk unknown
  • 1998-06-05 AU AU77524/98A patent/AU7752498A/en not_active Abandoned
  • 1998-06-05 DE DE19882483T patent/DE19882483T1/de not_active Ceased
  • 1998-06-05 WO PCT/BA1998/000002 patent/WO1998059126A1/en active IP Right Grant
  • 1998-06-05 PL PL98337482A patent/PL337482A1/xx unknown

Patent Citations (5)

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