GB2095740A - Method of building - Google Patents

Method of building Download PDF

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Publication number
GB2095740A
GB2095740A GB8208870A GB8208870A GB2095740A GB 2095740 A GB2095740 A GB 2095740A GB 8208870 A GB8208870 A GB 8208870A GB 8208870 A GB8208870 A GB 8208870A GB 2095740 A GB2095740 A GB 2095740A
Authority
GB
United Kingdom
Prior art keywords
shuttering
mould
collapsible
concrete
collapsible structure
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
Application number
GB8208870A
Other versions
GB2095740B (en
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.)
Magnex Ltd
Original Assignee
Magnex 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 Magnex Ltd filed Critical Magnex Ltd
Priority to GB8208870A priority Critical patent/GB2095740B/en
Publication of GB2095740A publication Critical patent/GB2095740A/en
Application granted granted Critical
Publication of GB2095740B publication Critical patent/GB2095740B/en
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00Forming or shuttering elements for general use
    • E04G9/02Forming boards or similar elements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00Forming or shuttering elements for general use
    • E04G9/10Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

To accommodate soil swell, a method of building comprises laying as shuttering or mould parts, collapsible structures including a separator (3) of low wet strength sandwiched between two sheets (1, 2) of material, at least one (2) of which is moisture permeable, the collapsible structure being used to form at least one side of the shuttering or mould and thereafter casting concrete or like material in the shuttering or mould while allowing extraneous moisture to penetrate only through a surface not in contact with the concrete or like material. <IMAGE>

Description

SPECIFICATION Method of building This invention relates to a method of building and more particularly to a method of building using collapsible structures.
It has been found desirable to use void forming arrangements when casting concrete in situ for producing, for example, concrete flooring. In this known method, it was proposed to provide a void under a concrete floor either for the purpose of allowing for soil swell, particularly in areas of clay soil, or to provide for ventilation under the floor.
The invention seeks to provide a method of building using collapsible structures for concrete and like casting.
According to the invention a method of building comprises laying, as shuttering to define a construction or mould parts, collapsible structures including a separator of low wet strength sandwiched between two sheets of material, at least one of which is moisture permeable, the collapsible structure to form at least one side of a shuttering construction of mould, and thereafter casting concrete or like material in the shuttering or mould structure while allowing extraneous moisture to penetrate the collapsible structure only through a surface not in contact with the concrete.
The shuttering or mould parts may be entirely of collapsible material.
In a preferred form of the invention, the collapsible structure has one of its sheets produced from a porous material, the sheet itself being imperforate. This has the advantage, as opposed to the use of perforated material, such as perforated hardboard of allowing cheaper material to be used without weakening the dry strength of the structure. It can also result in a greater controllability of the life of the collapsible structure than where materials which are perforate, but otherwise impermeable, are used. Suitable materials for the outer sheets comprise chipboard or composition board, the separator being made, for example, from card or paper, particularly regenerated cardboard.The mould or shuttering structure may be lined with a water permeable membrane such as plastics sheeting so as to prevent the water which is present in the concrete from activating the destruction of or collapse of the structure. Alternatively, the sheet of the material which is to be adjacent to the concrete may be made effectively water impermeable so that the concrete can be placed directly against the shuttering or mould structure.
The invention will now be described, in greater detail, with reference to the drawings, in which: Fig. 1 is a sectional view through part of a building structure showing the arrangement of boards produced as collapsible structures in use in accordance with the invention; Fig. 2 is a perspective view partly broken away of part of a collapsible structure of suitable form in use in the method of the invention.
In the method of the invention, is illustrated by the embodiment shown in Fig. 1, in which the method is used for providing a foundation like structure intended to form the base of structural walls and on which a concrete floor may be laid, the concrete flooring being either produced by precast slabs or being made in situ, for example, using the material of the invention as a base.
A suitable material for use in the method is shown in Fig. 2 and comprises a structure consisting of two sheets 1 and 2 of chipboard which are separated by a separator, in the form of paper or cardboard, particularly regenerated cardboard. The sheets of chipboard 1 and 2 may suitably be glued to the separator 3 and this glue may if desired be water soluble. The core will clearly have a poor wet strength and once wet will suitably collapse under any form of pressure. In the embodiment shown, both the sheets of chipboard are of course, by their very nature, porous and therefore will allow the passage of moisture through them after a predetermined period. This moisture will be transferred to the separator material so as to enable the structure to collapse.For this reason, when using this structure it is necessary to cover the sheet which is intended to be in contact with the concrete with a sheet of plastics or other impermeable membrane so that water present in the concrete cannot penetrate into the structure and cause premature collapse.
Since the water will pass through the chipboard at a predetermined rate, depending upon the prevailing humidity, it is possible to control the life of the collapsible material by suitable selection of the thickness of the sheet through which the water is to penetrate.
Referring again now to Fig. 1, the operation of the method proceeds as follows: The necessary foundation trench 10 is dug and this trench is then lined with the collapsible structure, such as that shown in Fig. 2 by boards 11, 12 and 14. The structure is then covered by an impermeable membrane not shown, after which the concrete 1 5 can be poured.
The concrete is then allowed to set.
The moisture which is present in the soil surrounding the collapsible boards 11, 12 and 14 will gradually penetrate into boards and permit them to collapse, the arrangement being such that insufficient water penetrates the outer sheet to cause the collapse until the concrete has in fact set.
There may be certain circumstances in which it is desired to remove the shuttering or mould parts of the structure once the structure has been completed and in these circumstances the collapsible structure may be additionally artificially weakened by spraying it or the ground around it with water so as to hasten penetration. Once the structure is in a collapsible condition, the various parts of it can collapse and the structure is removed if required.
Fig. 1 additionally shows the provision of a cavity wall 16, built on the foundation concrete 1 5 and the construction of a concrete floor 1 7 produced in situ on further collapsible boarding 18.
It will be appreciated that various modifications may be made to the described embodiment without departing from the scope of the invention.
For example, the materials from which the collapsible structure is made can be varied as required. It is not even necessary for outer sheets of the structure to be made of the same material, one sheet being, for example, impermeable and the other permeable. Although a honeycomb core structure has been shown, any suitable separating arrangement of low wet strength can be used, the only criteria being that the structure itself must be capable of supporting the weight and/or applied force of the concrete being used. The material of the permeable sheet may have a thickness determined by its rate of permeability to moisture.
Furthermore, the actual material can be selected for similar reasons. In an alternative, the permeable sheet may be built up from a number of layers, the number of layers depending on the existing ground conditions.

Claims (10)

1. A method of building comprising laying, as shuttering or mould parts, collapsible structures including a separator of low wet strength sandwiched between two sheets of material, at least one of which is moisture permeable, the collapsible structure being used to form at least one side of the shuttering or mould and thereafter casting concrete or like material in the shuttering or mould while allowing extraneous moisture to penetrate the collapsible structure only through a surface not in contact with the concrete or like material.
2. A method as claimed in claim 1, wherein the shuttering or mould is made entirely of collapsible material.
3. A method as claimed in claim 1 or 2, wherein said at least one sheet is porous.
4. A method as claimed in claim 1 or 2, wherein said at least one sheet is perforated.
5. A method as claimed in any one of claims 1 to 4, wherein one or both of the outer sheets of the collapsible structure comprise chipboard or composition board.
6. A method as claimed in any one of claims 1 to 4, wherein one or both the outer sheets of the collapsible structure comprise perforated hardboard.
7. A method as claimed in any one of claims 1 to 5, wherein the separator comprises card or paper.
8. A method as claimed in claim 7 wherein the separator is regenerated cardboard.
9. A method as claimed in any one of claims 1 to 8, wherein the shuttering or mould is lined with a water permeable membrane to prevent water present in the concrete or like material from activating destruction or collapse of the collapsible structure.
10. A method of building substantially as described herein with reference to the drawings.
GB8208870A 1981-03-27 1982-03-26 Method of building Expired GB2095740B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8208870A GB2095740B (en) 1981-03-27 1982-03-26 Method of building

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8109745 1981-03-27
GB8208870A GB2095740B (en) 1981-03-27 1982-03-26 Method of building

Publications (2)

Publication Number Publication Date
GB2095740A true GB2095740A (en) 1982-10-06
GB2095740B GB2095740B (en) 1985-01-30

Family

ID=26278919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8208870A Expired GB2095740B (en) 1981-03-27 1982-03-26 Method of building

Country Status (1)

Country Link
GB (1) GB2095740B (en)

Cited By (5)

* 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
GB2186313A (en) * 1986-02-06 1987-08-12 Dufaylite Dev Ltd Spacing components usable as temporary formwork for casting concrete
FR2647838A1 (en) * 1989-06-05 1990-12-07 Antoine Alain Shuttering for earthquake-resistant joint
GB2245625A (en) * 1990-07-05 1992-01-08 Richard Knight Ground treatment
GB2486723B (en) * 2010-12-23 2017-08-23 Cordek Ltd Shuttering

Cited By (6)

* 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
GB2186313A (en) * 1986-02-06 1987-08-12 Dufaylite Dev Ltd Spacing components usable as temporary formwork for casting concrete
GB2186313B (en) * 1986-02-06 1989-11-01 Dufaylite Dev Ltd Spacing components
FR2647838A1 (en) * 1989-06-05 1990-12-07 Antoine Alain Shuttering for earthquake-resistant joint
GB2245625A (en) * 1990-07-05 1992-01-08 Richard Knight Ground treatment
GB2486723B (en) * 2010-12-23 2017-08-23 Cordek Ltd Shuttering

Also Published As

Publication number Publication date
GB2095740B (en) 1985-01-30

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20020325