EP0874731A1 - Panel for raised floors - Google Patents
Panel for raised floorsInfo
- Publication number
- EP0874731A1 EP0874731A1 EP96939929A EP96939929A EP0874731A1 EP 0874731 A1 EP0874731 A1 EP 0874731A1 EP 96939929 A EP96939929 A EP 96939929A EP 96939929 A EP96939929 A EP 96939929A EP 0874731 A1 EP0874731 A1 EP 0874731A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- panel
- panel according
- cement
- layer
- mix
- 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- Withdrawn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
- 239000004568 cement Substances 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- -1 carpeting Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 4
- 238000005266 casting Methods 0.000 claims 2
- 239000003822 epoxy resin Substances 0.000 claims 2
- 229920000058 polyacrylate Polymers 0.000 claims 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims 2
- 229920000647 polyepoxide Polymers 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/02—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material with fibres or particles being present as additives in the layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/06—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/024—Sectional false floors, e.g. computer floors
- E04F15/02405—Floor panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
Definitions
- the present invention relates to a panel for raised floors and particularly to the structure of said panel.
- raised floors are substantially constituted by a metal frame that rests on the original floor and supports modular prefabricated panels of standard sizes, which are arranged side by side.
- the walking surface of the panels is formed by a covering made of quality material such as wood, carpeting, ceramics, stone, etcetera.
- the materials used for the load-bearing body of the panels are the most disparate, including chipwood, plaster, cement, etcetera, optionally in combination (to improve the load-bearing capacity if the floor is subjected to flexural stresses caused by pedestrian traffic, the passage of trolleys or the weight of furniture and other static loads) with a steel reinforcing plate a few millimeters thick, the plan dimensions whereof match those of the panel.
- Pref bricated panels for raised floors having a structure based on cement that is covered at the top at the walking surface have a severe drawback, during their operating life, due to the fact that they slowly but gradually warp, forming a concavity that is directed towards the extrados, i.e., upwards.
- a principal aim of the present invention is to eliminate the above-described drawback in panels for raised floors having a cement-based structure.
- a consequent primary object is to provide a panel for raised floors which, despite not having a metal reinforcement plate on the intrados, is capable of withstanding sufficiently high bending stresses and of having a ductile behavior instead of a fragile one as regards bending fracture.
- Another important object is to provide a panel for raised floors that does not undergo deformations over time, withstands a high concentrated load, and is not penetrated by pressurized water.
- a panel for raised floors with a structure comprising at least one layer based on cement and polymeric fibers, covered with at least one sheet of aluminum coupled by means of adhesive.
- figure 1 is a perspective view of a panel according to the invention
- figure 2 is a sectional enlarged-scale detail view of the panel of figure 1
- figure 3 is a chart that plots the deflection in mm as a function of time, measured in days, for a panel according to the invention, compared with the one of a panel according to the state of the art.
- a panel for raised floors according to the invention is generally designated by the reference numeral 10 and has a structure that is substantially composed of two separate layers 11 and 12, both of which are made of cement-like material and polymeric fibers, and is covered with an aluminum sheet 13 which is coupled by means of an adhesive 14.
- the walking surface is formed by a layer 15 made of quality material, such as wood, carpeting, ceramics, stone, etcetera.
- the panel 10 is the result of a production process that first of all provides for the production of the cement-based panel and then covers it.
- first of all cement is mixed with additives, polymeric fibers, and water, so as to obtain a plastic paste.
- a preferred composition of the mix includes:
- Mapefluid additive 0.10 kg — water: 1.5 kg.
- the panel will ultimately constitute said layer 11 of the panel 10.
- cement is mixed with fibers, inert material, and water, so as to obtain the consistency of moist earth.
- very fine powder (with a size of substantially less than 1 mm) constituted by ground rock or material recovered from the process of the subsequent gauging step (described hereinafter) ; natural or artificial sand with a density substantially between 1 and 2.7 g/m 3 , with a maximum size of substantially no more than 2 mm.
- the amount of the ingredients in the second mix can be given, by way of example, as:
- Moist setting can last a few days at room temperature and can be reduced to 12-16 hours if the temperature is raised to 40-80 degrees Celsius (for example 60 degrees Celsius) .
- the panel After moist setting, the panel is left exposed to the air for up to approximately 7 days, so as to allow drying, which is usually accompanied by a deformation of the panel caused by differential shrinkage of the two layers 11 and 12, which becomes apparent as a warping of the item.
- the subsequent step is the gauging of the panel to eliminate deformations.
- This operation consists in performing the surface abrasion of the panel until a uniform thickness is achieved, obtaining the desired final thickness (for example, as mentioned, 34 mm).
- the powdered material produced by abrasion can be recycled in the process itself as very fine inert material.
- the panel When gauging ends, the panel, in addition to having uniform and programmed dimensions, is covered with aluminum sheet 13 in order to make it capable of withstanding a high bending stress (at least 600 kg) applied to one of its extrados edges after placing the panel on four supports at the intrados corners.
- a high bending stress at least 600 kg
- the covering operation provides for a first step, in which a very thin layer of adhesive material based on polyurethane resin (for example the commercial product known as Adesilex) is applied to the gauged and set panel in an amount between 40 and 80 kg/m 2 (for example 60 kg/square meter) .
- a metallic sheet preferably made of aluminum, with a thickness of 50 microns or less, is then applied to the panel treated with the adhesive resin.
- figure 3 plots the deflection "1" of the central region with respect to the edges of a panel (60 x 60 x 3.4 cm) left exposed to the air for a few months.
- the chart shows that the cement panel according to the invention (line 16) is considerably more stable and less deformable than a normal cement panel reinforced with a steel plate (line 17).
- the technical performance of the panel according to the invention can be summarized by a concentrated load of more than 600 kg applied before fracture occurs, 0.5 mm deflection due to warping through exposure to air for two months, penetration of water under pressure (7 bar) lower than, or equal to, 1 mm.
- the materials employed may be any according to requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Floor Finish (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT95PD000229A IT1282210B1 (en) | 1995-11-29 | 1995-11-29 | SHEET FOR RAISED FLOORS |
ITPD950229 | 1995-11-29 | ||
PCT/EP1996/005224 WO1997019810A1 (en) | 1995-11-29 | 1996-11-25 | Panel for raised floors |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0874731A1 true EP0874731A1 (en) | 1998-11-04 |
Family
ID=11391183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96939929A Withdrawn EP0874731A1 (en) | 1995-11-29 | 1996-11-25 | Panel for raised floors |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0874731A1 (en) |
CN (1) | CN1202853A (en) |
IT (1) | IT1282210B1 (en) |
WO (1) | WO1997019810A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK1534511T3 (en) * | 2002-07-16 | 2012-07-09 | Hardie James Technology Ltd | PACKAGING FOR PREFABRICATED FIBER CEMENT PRODUCTS |
US8281535B2 (en) | 2002-07-16 | 2012-10-09 | James Hardie Technology Limited | Packaging prefinished fiber cement articles |
EP1531148A1 (en) * | 2003-11-14 | 2005-05-18 | I.C.R.S. Industrial Ceramic Reinforcement Solution S.r.L. | A panel in particular for raised flooring and a process for manufacturing said panel |
ITMO20080330A1 (en) * | 2008-12-24 | 2010-06-25 | Mariano Paganelli | PROCEDURE FOR REALIZING HIGH RESISTANCE TILES FOR THE COATING OF FLOORS AND WALLS, INSIDE OR OUTSIDE. |
CN110847552B (en) * | 2019-11-01 | 2021-11-12 | 山东瑞道地毯有限公司 | Wood carpet embedded with metal strips and process thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2333101A1 (en) * | 1975-11-28 | 1977-06-24 | Ferrer Sayol Maria | PREFABRICATED ELEMENT FOR THE REALIZATION OF FLOORS AND OTHER COATINGS |
US4113913A (en) * | 1976-05-13 | 1978-09-12 | Rohm And Haas Company | Foamed cementitious material and composite |
GB2081643B (en) * | 1980-08-13 | 1984-08-08 | Cape Boards & Panels Ltd | Construction panels |
GB2110987B (en) * | 1981-10-06 | 1985-08-14 | Scott Bader Co | Laminates containing inorganic structural materials |
-
1995
- 1995-11-29 IT IT95PD000229A patent/IT1282210B1/en active IP Right Grant
-
1996
- 1996-11-25 CN CN96198534A patent/CN1202853A/en active Pending
- 1996-11-25 WO PCT/EP1996/005224 patent/WO1997019810A1/en not_active Application Discontinuation
- 1996-11-25 EP EP96939929A patent/EP0874731A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9719810A1 * |
Also Published As
Publication number | Publication date |
---|---|
ITPD950229A1 (en) | 1997-05-29 |
CN1202853A (en) | 1998-12-23 |
ITPD950229A0 (en) | 1995-11-29 |
WO1997019810A1 (en) | 1997-06-05 |
IT1282210B1 (en) | 1998-03-16 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19980609 |
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AK | Designated contracting states |
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GRAG | Despatch of communication of intention to grant |
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17Q | First examination report despatched |
Effective date: 19991130 |
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GRAG | Despatch of communication of intention to grant |
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GRAH | Despatch of communication of intention to grant a patent |
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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 |
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18D | Application deemed to be withdrawn |
Effective date: 20000718 |