GB1605137A - Method of building using a collapsible structure - Google Patents

Method of building using a collapsible structure Download PDF

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Publication number
GB1605137A
GB1605137A GB5016/81A GB501681A GB1605137A GB 1605137 A GB1605137 A GB 1605137A GB 5016/81 A GB5016/81 A GB 5016/81A GB 501681 A GB501681 A GB 501681A GB 1605137 A GB1605137 A GB 1605137A
Authority
GB
United Kingdom
Prior art keywords
clay
board
water soluble
moisture
skin
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.)
Expired
Application number
GB5016/81A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
APPLIED SURFACES Ltd
Original Assignee
APPLIED SURFACES Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by APPLIED SURFACES Ltd filed Critical APPLIED SURFACES Ltd
Priority to GB5016/81A priority Critical patent/GB1605137A/en
Publication of GB1605137A publication Critical patent/GB1605137A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/0007—Base structures; Cellars
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
    • E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • 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
    • B32B2419/00—Buildings or parts thereof

Description

(54) A METHOD OF BUILDING USING A COLLAPSIBLE STRUCTURE (71) We, APPLIED SURFACES LTD., an Isle of Man company, of 8 St. Georges Street, Douglas, Isle of Man, do hereby declare this invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed to particularly described in and by the following statement: This invention relates to a method of building using a collapsible structure.
With present day building methods, and in particular the provision of concrete floors on the ground floors of houses, considerable trouble has occurred where such floors are laid onto subsoils which are predominantly of a clay nature. The problem which arises depends upon the fact that clay will swell when moisture is introduced and will shrink when moisture is removed. In the case of clay situated under a house, the difference in level between dry clay and wet clay can be as high as 30 mm.
Thus, variations in the condition of the clay can have a very serious effect on any flooring material which is laid directly thereon, and when this flooring material is in contact with walls, the variations can cause severe damage to the building to which it belongs. In fact, this damage can be so severe that the building has to be demolished as being uneconomical to repair.
In order to overcome this problem it has been proposed to provide precast floor elements which can be mounted in position leaving a void between the underside and the ground.
However, this process is of a very costly nature because, in most instances, it necessitates the transport of large concrete blocks and the provision at the site of a relatively large crane in order to unload the concrete elements and to place them in their appropriate position. As a result, other means have been tried to introduce between the floor and the clay a material which is sufficiently compressible to allow the movement of the clay to take place but of sufficient strength to form a firm base for the casting of the appropriate floor. Such proposals have included expanded polystyrene, ash and uncompacted sand. However, these have not proved satisfactory since where they are strong ehough to support the load during casting of a concrete floor, they are insufficiently compressible to allow for full expansion and contraction of the clay and vice versa.
The present invention seeks to provide a method of building in which the above problems are reduced or overcome.
According to the invention, there is provided a method of building comprising taking a collapsible structure which includes a separating structure of poor wet strength sandwiched between two sheets of material at least one of which is of such a nature as to allow the passage of moisture, laying the collapsible structure on the ground with its moisture permeable sheet face downwards and forming flooring on the collapsible structure.
Preferably a damp proof membrane is laid on the collapsible structure before forming the flooring thereon. At least one of the sheets of the structure may have perforations for allowing the passage of moisture. The separating structure may be of honeycomb form and may comprise water soluble or water disintegratable paper. Both sheets of material may comprise hardboard. The whole may suitably be glued together using a water soluble glue. One such structure is described and claimed in our Co- pending Application No. 33619/77 (Serial No.
1605136).
The invention will now be described in greater detail, by way of example with reference to the drawing, the single figure of which is a perspective view of a corner of a board having a collapsible structure suitable for use with the method of the invention, the board being shown partly cut away.
Referring to the drawing, the collapsible board 1 comprises two outer skins or sheets 2 and 3 of hardboard, the skin 2 intended to be in the upper position being unbroken. The underneath skin 3 is provided with a number of perforations 4. Between the two skins there is arranged a honeycomb structure 5 of a water soluble paper e.g. reconstituted paper, which in the form shown has a hexagonal honeycomb construction.
In use in building construction, when the ground has been prepared and the foundations laid, the boards are laid with their perforated face downwardly on the clay surface and the top of the board is covered by suitable damp proof membrane, for example polythene.
Once in position, the floor can be cast thereon in the usual fashion for reinforced concrete and compacted in the usual way.
With suitable dimensions of the board, even when the clay is very wet, the board will remain firm during the period which is necessary to set the concrete, i.e. a period in excess of sixteen hours. At the end of this period, the moisture from the clay seeps through the perforations 4 in the skin 3 and causes disolution of the glue and disintegration of the honeycomb structure.
Thus with any swelling of the clay, the skin 3 can be pushed upward with virtually no resistance until it reaches the skin 2, thus providing ample room for expansion of the clay. It is necessary for the thickness of the boards to be of the order of 30 mm since this is normally considered the maximum expansion of clay but for safety factor reasons it may be somewhat larger. It is to be noted that there is on need for the edges of the board to be closed and in fact such closure would be detrimental to the compressibility of the board.
It is to be understood that various modifications may be made to the above described embodiment without departing from the scope of the invention. For example the honeycomb structure which has been provided may be replaced by other forms of honeycomb structure or indeed could be replaced by longitudinal webs. The arrangement of the apertures in the skin could be different to that shown and in fact larger and less numerous apertures could be used. If desired, for purposes of uniformity of construction or reversibility of the board, both skins may be perforated. While water soluble paper and glue are preferred, it would be possible to use as a honeycomb structure a material having a low wet strength and to rely on the destruction of the honeycomb without the necessity of arranging for it to become unglued.However, it is pointed out that this modification is less desirable than the use of water soluble materials since the use of the water soluble material will provide for a better certainty of early compressibility. If desired, in certain circumstances the hardboard used for the skins could be replaced by other suitable materials, such as plastics sheet.
WHAT WE CLAIM IS: 1. A method of building comprising taking a collapsible structure which includes a separating structure of poor wet strength sandwiched between two sheets of material at least one of which is of such a nature as to allow the passage of moisture, laying the collapsible structure on the ground with its moisture permeable sheet face downwards and forming flooring on the collapsible structure.
2. A method as claimed in Claim 1, wherein a damp proof membrane is laid on the collapsible structure before forming the flooring thereon.
3. A method as claimed in Claim 1 or 2, wherein at least one of the sheets is provided with perforations for allowing the passage of moisture.
4. A method as claimed in Claim 1,2 or 3, wherein the separating structure is of honey comb form.
5. A method as claimed in any one of Claims 1 to 4, wherein the separating structure comprises water soluble or water disintegratable paper.
6. A method as claimed in any one of Claims 1 to 5, wherein the sheets of material comprise hardboard.
7. A method as claimed in any one of Claims 1 to 6, wherein the structure is assembled with a water soluble glue.
8. A method of building substantially as described herein with reference to the drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. ground has been prepared and the foundations laid, the boards are laid with their perforated face downwardly on the clay surface and the top of the board is covered by suitable damp proof membrane, for example polythene. Once in position, the floor can be cast thereon in the usual fashion for reinforced concrete and compacted in the usual way. With suitable dimensions of the board, even when the clay is very wet, the board will remain firm during the period which is necessary to set the concrete, i.e. a period in excess of sixteen hours. At the end of this period, the moisture from the clay seeps through the perforations 4 in the skin 3 and causes disolution of the glue and disintegration of the honeycomb structure. Thus with any swelling of the clay, the skin 3 can be pushed upward with virtually no resistance until it reaches the skin 2, thus providing ample room for expansion of the clay. It is necessary for the thickness of the boards to be of the order of 30 mm since this is normally considered the maximum expansion of clay but for safety factor reasons it may be somewhat larger. It is to be noted that there is on need for the edges of the board to be closed and in fact such closure would be detrimental to the compressibility of the board. It is to be understood that various modifications may be made to the above described embodiment without departing from the scope of the invention. For example the honeycomb structure which has been provided may be replaced by other forms of honeycomb structure or indeed could be replaced by longitudinal webs. The arrangement of the apertures in the skin could be different to that shown and in fact larger and less numerous apertures could be used. If desired, for purposes of uniformity of construction or reversibility of the board, both skins may be perforated. While water soluble paper and glue are preferred, it would be possible to use as a honeycomb structure a material having a low wet strength and to rely on the destruction of the honeycomb without the necessity of arranging for it to become unglued.However, it is pointed out that this modification is less desirable than the use of water soluble materials since the use of the water soluble material will provide for a better certainty of early compressibility. If desired, in certain circumstances the hardboard used for the skins could be replaced by other suitable materials, such as plastics sheet. WHAT WE CLAIM IS:
1. A method of building comprising taking a collapsible structure which includes a separating structure of poor wet strength sandwiched between two sheets of material at least one of which is of such a nature as to allow the passage of moisture, laying the collapsible structure on the ground with its moisture permeable sheet face downwards and forming flooring on the collapsible structure.
2. A method as claimed in Claim 1, wherein a damp proof membrane is laid on the collapsible structure before forming the flooring thereon.
3. A method as claimed in Claim 1 or 2, wherein at least one of the sheets is provided with perforations for allowing the passage of moisture.
4. A method as claimed in Claim 1,2 or 3, wherein the separating structure is of honey comb form.
5. A method as claimed in any one of Claims 1 to 4, wherein the separating structure comprises water soluble or water disintegratable paper.
6. A method as claimed in any one of Claims 1 to 5, wherein the sheets of material comprise hardboard.
7. A method as claimed in any one of Claims 1 to 6, wherein the structure is assembled with a water soluble glue.
8. A method of building substantially as described herein with reference to the drawing.
GB5016/81A 1978-05-26 1978-05-26 Method of building using a collapsible structure Expired GB1605137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5016/81A GB1605137A (en) 1978-05-26 1978-05-26 Method of building using a collapsible structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5016/81A GB1605137A (en) 1978-05-26 1978-05-26 Method of building using a collapsible structure

Publications (1)

Publication Number Publication Date
GB1605137A true GB1605137A (en) 1982-02-10

Family

ID=9788169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5016/81A Expired GB1605137A (en) 1978-05-26 1978-05-26 Method of building using a collapsible structure

Country Status (1)

Country Link
GB (1) GB1605137A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183282A (en) * 1985-11-14 1987-06-03 Jeffrey Charles Arthur Forkes Building element
FR2899839A1 (en) * 2006-04-12 2007-10-19 Tonelli France Sas Soc Par Act Cellular packed panel for encasing space between two concrete walls, has cell with set of walls, where each wall has perforations that are divided on median direction and permit passage of flow of water from one cell to another cell
FR3018300A1 (en) * 2014-03-07 2015-09-11 Cofrasud LOWER FORMWORK PANEL OF CELLULOSIC MATERIAL CAPABLE OF DEGRADING IN THE PRESENCE OF WATER, LOST FORMWORK PRODUCED AND METHOD OF FORMING A VACUUM IN A CONSTRUCTION.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183282A (en) * 1985-11-14 1987-06-03 Jeffrey Charles Arthur Forkes Building element
FR2899839A1 (en) * 2006-04-12 2007-10-19 Tonelli France Sas Soc Par Act Cellular packed panel for encasing space between two concrete walls, has cell with set of walls, where each wall has perforations that are divided on median direction and permit passage of flow of water from one cell to another cell
FR3018300A1 (en) * 2014-03-07 2015-09-11 Cofrasud LOWER FORMWORK PANEL OF CELLULOSIC MATERIAL CAPABLE OF DEGRADING IN THE PRESENCE OF WATER, LOST FORMWORK PRODUCED AND METHOD OF FORMING A VACUUM IN A CONSTRUCTION.

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19980525