GB1598237A - Formwork for cementitious material - Google Patents

Formwork for cementitious material Download PDF

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Publication number
GB1598237A
GB1598237A GB11368/78A GB1136878A GB1598237A GB 1598237 A GB1598237 A GB 1598237A GB 11368/78 A GB11368/78 A GB 11368/78A GB 1136878 A GB1136878 A GB 1136878A GB 1598237 A GB1598237 A GB 1598237A
Authority
GB
United Kingdom
Prior art keywords
blocks
panels
block
tie
dovetail
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
GB11368/78A
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.)
Stones H B
Original Assignee
Stones H B
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 Stones H B filed Critical Stones H B
Priority to GB11368/78A priority Critical patent/GB1598237A/en
Publication of GB1598237A publication Critical patent/GB1598237A/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
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2/28—Walls having cavities between, but not in, the elements; Walls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid
    • E04B2/30—Walls having cavities between, but not in, the elements; Walls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid using elements having specially designed means for stabilising the position; Spacers for cavity walls
    • 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
    • E04B2/8635—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties attached to the inner faces of the forms
    • E04B2/8641—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties attached to the inner faces of the forms using dovetail-type connections
    • 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
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2002/0202—Details of connections
    • E04B2002/0204—Non-undercut connections, e.g. tongue and groove connections
    • E04B2002/0206—Non-undercut connections, e.g. tongue and groove connections of rectangular shape
    • 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
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E04B2002/0202—Details of connections
    • E04B2002/0243—Separate connectors or inserts, e.g. pegs, pins or keys
    • E04B2002/0252—Dovetail keys
    • 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
    • E04B2002/867—Corner details

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Description

(54) IMPROVEMENTS IN FORMWORK FOR CEMENTITIOUS MATERIAL (71) I, HENRY BURTON STONES, a British subject, of Green Dod, Black Beck Wood, Windermere, Cumbria, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following state menu: This invention relates to permanent forms for cementitious material and is particularly concerned with insulated formwork and with methods of constructing such formwork for concrete walling.
British Patent Specification No. 1,169,723 describes and claims a self-supporting form of plastics foam moulded in one piece and capable of containing liquid concrete without additional shoring or transverse tie wires, said form including two spaced longitudinal walls terminating at or adjacent to two spaced transverse end walls and one or more transverse partition walls intermediate said end walls. Such a form suffers from the disadvantages that it is bulky and takes up a lot of room when being transported to a site for use and that, by virtue of the fixed transverse end walls and partition walls, it can only be used to construct a wall of uniform thickness. In other words, different forms must be used to construct walls of different thicknesses.
A partial solution to these problems is achieved by the form described and claimed in British Patent Specification No. 1,277,816 in which two spaced panels of foamed polymeric material are interconnected by connecting members each of which consists of two plates projecting towards each other from respective panels in which they are partially embedded. The plates are secured together by fastening means which allow the distance between the associated panels, and hence the thickness of the form, to be adjusted within limits imposed by the plates and fastening means. While this arrangement goes some way to meeting the problems, this form still suffers from the disadvantage of being bulky for transportation and the thickness of the form can be adjusted only between fairly narrow limits.
The present invention aims to overcome the above-mentioned disadvantages.
According to the invention, there is provided a permanent form for cementitious material comprising at least one pair of panels or blocks and at least one tie member securing said panels or blocks together at a predetermined spacing, wherein the or each tie member is provided at each end with a dovetail tenon, wherein each of the panels or blocks is provided with at least one correspondingly shaped dovetail recess for receiving a dovetail-shaped end of the or the associated tie member and wherein the or each tie member comprises a bar or strip provided with an aperture in its central region.
Each dovetail recess is preferably formed by a bent strip of metal which is cast into the associated panel or block during manufacture thereof.
According to one embodiment of the invention, each panel or block is substantially rectangular and is provided along two adjacent edges with a projecting tongue and along the remaining two side edges with a groove adapted to receive a tongue on a similar panel or block.
By means of the invention, it is possible to transport the panels or blocks to a site and then to assemble them into formwork using the tie members. Since the panels or blocks are substantially flat they take up little room and can be transported easily. A selection of tie members having different lengths are provided in order to provide assembled formwork with a wide variety of different thicknesses.
The invention will now be further described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a side elevation of one embodiment of a panel for use in the construction of formwork according to the invention, Figure 2 is a perspective view, to an enlarged scale, of one embodiment of assembled formwork according to the invention, showing one embodiment of a tie member securing together a pair of panels; Figure 3 is a section taken on the line Ill-Ill in Figure 2; and Figure 4 is a perspective view of assembled formwork according to the invention filled with cementitious material; In the drawings, like parts are denoted by like reference numerals.
Reference will first be made to Figure 1 of the drawings which shows a panel consisting of a rectangular block I having a projecting tongue 2 extending along two adjacent edges and a groove 3 corresponding in shape and size to the tongue 2 along the remaining two edges. The tongues 2 are designed to fit into the grooves 3 of adjacent and superposed blocks in order that the blocks can fit together in a secure manner. Alternatively, the block may have flat edges and be secured to adjacent blocks by means of adhesive.
The block 1 has three or more short lengths of metal dovetail shaped strips 4 cast into one face to form dovetail slots 5 in that face of the block. In order to construct formwork, a pair of blocks I are arranged at a predetermined desired spacing from each other and with the slots 5 in each block facing and aligned with each other. A tie member 6 consisting of a strip or bar corresponding in length to the desired spacing between the blocks 1 and having a dovetail shaped tenon 7 at each end serves to fasten the aligned blocks 1 together as shown in Figures 2 and 3.
The strips 4 have a width which is at least as great as and is preferably greater than the maximum width of the dovetails 7 of the tie bar 6 whereby said dovetails can be inserted into the slots 5 with the bar 6 substantially vertical or at least inclined to the horizontal after which the bar can be turned to the horizontal position shown in Figures 2 and 3.
The lower course of a wall is built in this manner from a series of adjacent pairs of blocks I with the tongue 2 on the side wall of each block engaging in the groove 3 in the side wall of an adjacent block. A second course can then be built on top of the first course with the tongue 2 projecting from the top of the blocks in the lower course engaging in the groove 3 provided in the bottom of each block in the upper course. A third and still further courses can be constructed in a similar manner with the blocks in adjacent courses staggered with respect to each other as shown in Figure 4. The blocks of each pair are secured together by tie bars 6 as above described (Figure 2).
Each tie bar 6 preferably has an aperture 8 in its central region through which a reinforcing rod 9 (Figure 4) can be passed.
Cementitious material 10 may then be poured into the cavity formed between the pairs of blocks or panels 1 as shown in Figure 4.
As further shown in Figure 4, the blocks 1 are preferably mitred at corners and corner bracing members 11 and 12 are provided on the outside of the corner for additional reinforcement. These bracing members may be removed in known manner once the cementitious material 10 has set hard.
The blocks or panels I are preferably made of foamed plastics, suitable materials being expanded polystyrene or phenolic resin, or expanded rigid PVC foam or other polymeric material, but other materials may be used if desired. Preferred dimensions of the blocks are 1200x400x50 mm but other dimensions are possible without departing from the scope of this invention. The tie members are desirably made of a noninflammable material such as metal.
It will be seen that, by means of the panels or blocks and tie members according to the invention, it is possible to transport formwork to a site in a convenient and stackable form and to construct the formwork to a desired thickness at the site at which it is required.
Various other embodiments and modifications are envisaged without departing from the scope of the invention as defined by the appended claims. For example, while the drawings show panels or blocks which are substantially flat it is also possible to use corrugated panels or blocks having protruberances and/or recesses on one or both surfaces such that the protruberances and recesses co-operate with one another when the panels are laid face to face and also to use L-shaped panels or blocks and the references to panels or blocks in this specification are intended to include such variations.
WHAT I CLAIM IS: 1. A permanent form for cementitious material comprising at least one pair of panels or blocks and at least one tie member securing said panels or blocks together at a predetermined spacing, wherein the or each tie member is provided at each end with a dovetail tenon, wherein each of the panels or blocks is provided with at least one correspondingly shaped dovetail recess for receiving a dovetail-shaped end of the or the associated tie member and wherein the or each tie member comprises a bar or strip provided with an aperture in its central region.
2. A permanent form according to claim 1, wherein each dovetail recess is formed by a bent strip of metal which is cast into the panel or block during manufacture thereof.
3. A permanent formwork according to claim 1 or claim 2, wherein each panel or block is substantially rectangular and is provided along two adjacent edges with a projecting tongue and along the remaining two side edges with a groove adapted to receive a tongue on a similar panel or block.
4. A permanent form according to any
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. Ill-Ill in Figure 2; and Figure 4 is a perspective view of assembled formwork according to the invention filled with cementitious material; In the drawings, like parts are denoted by like reference numerals. Reference will first be made to Figure 1 of the drawings which shows a panel consisting of a rectangular block I having a projecting tongue 2 extending along two adjacent edges and a groove 3 corresponding in shape and size to the tongue 2 along the remaining two edges. The tongues 2 are designed to fit into the grooves 3 of adjacent and superposed blocks in order that the blocks can fit together in a secure manner. Alternatively, the block may have flat edges and be secured to adjacent blocks by means of adhesive. The block 1 has three or more short lengths of metal dovetail shaped strips 4 cast into one face to form dovetail slots 5 in that face of the block. In order to construct formwork, a pair of blocks I are arranged at a predetermined desired spacing from each other and with the slots 5 in each block facing and aligned with each other. A tie member 6 consisting of a strip or bar corresponding in length to the desired spacing between the blocks 1 and having a dovetail shaped tenon 7 at each end serves to fasten the aligned blocks 1 together as shown in Figures 2 and 3. The strips 4 have a width which is at least as great as and is preferably greater than the maximum width of the dovetails 7 of the tie bar 6 whereby said dovetails can be inserted into the slots 5 with the bar 6 substantially vertical or at least inclined to the horizontal after which the bar can be turned to the horizontal position shown in Figures 2 and 3. The lower course of a wall is built in this manner from a series of adjacent pairs of blocks I with the tongue 2 on the side wall of each block engaging in the groove 3 in the side wall of an adjacent block. A second course can then be built on top of the first course with the tongue 2 projecting from the top of the blocks in the lower course engaging in the groove 3 provided in the bottom of each block in the upper course. A third and still further courses can be constructed in a similar manner with the blocks in adjacent courses staggered with respect to each other as shown in Figure 4. The blocks of each pair are secured together by tie bars 6 as above described (Figure 2). Each tie bar 6 preferably has an aperture 8 in its central region through which a reinforcing rod 9 (Figure 4) can be passed. Cementitious material 10 may then be poured into the cavity formed between the pairs of blocks or panels 1 as shown in Figure 4. As further shown in Figure 4, the blocks 1 are preferably mitred at corners and corner bracing members 11 and 12 are provided on the outside of the corner for additional reinforcement. These bracing members may be removed in known manner once the cementitious material 10 has set hard. The blocks or panels I are preferably made of foamed plastics, suitable materials being expanded polystyrene or phenolic resin, or expanded rigid PVC foam or other polymeric material, but other materials may be used if desired. Preferred dimensions of the blocks are 1200x400x50 mm but other dimensions are possible without departing from the scope of this invention. The tie members are desirably made of a noninflammable material such as metal. It will be seen that, by means of the panels or blocks and tie members according to the invention, it is possible to transport formwork to a site in a convenient and stackable form and to construct the formwork to a desired thickness at the site at which it is required. Various other embodiments and modifications are envisaged without departing from the scope of the invention as defined by the appended claims. For example, while the drawings show panels or blocks which are substantially flat it is also possible to use corrugated panels or blocks having protruberances and/or recesses on one or both surfaces such that the protruberances and recesses co-operate with one another when the panels are laid face to face and also to use L-shaped panels or blocks and the references to panels or blocks in this specification are intended to include such variations. WHAT I CLAIM IS:
1. A permanent form for cementitious material comprising at least one pair of panels or blocks and at least one tie member securing said panels or blocks together at a predetermined spacing, wherein the or each tie member is provided at each end with a dovetail tenon, wherein each of the panels or blocks is provided with at least one correspondingly shaped dovetail recess for receiving a dovetail-shaped end of the or the associated tie member and wherein the or each tie member comprises a bar or strip provided with an aperture in its central region.
2. A permanent form according to claim 1, wherein each dovetail recess is formed by a bent strip of metal which is cast into the panel or block during manufacture thereof.
3. A permanent formwork according to claim 1 or claim 2, wherein each panel or block is substantially rectangular and is provided along two adjacent edges with a projecting tongue and along the remaining two side edges with a groove adapted to receive a tongue on a similar panel or block.
4. A permanent form according to any
preceding claim, wherein the panels or blocks are made of foamed plastics material.
5. A permanent form according to any preceding claim, wherein the or each tie member is made of non-inflammable material.
6. A permanent form according to any preceding claim, wherein the or each tie member is made of metal.
7. A permanent form for cementitious material substantially as described herein with reference to the drawings.
GB11368/78A 1978-03-22 1978-03-22 Formwork for cementitious material Expired GB1598237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB11368/78A GB1598237A (en) 1978-03-22 1978-03-22 Formwork for cementitious material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11368/78A GB1598237A (en) 1978-03-22 1978-03-22 Formwork for cementitious material

Publications (1)

Publication Number Publication Date
GB1598237A true GB1598237A (en) 1981-09-16

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ID=9984967

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GB11368/78A Expired GB1598237A (en) 1978-03-22 1978-03-22 Formwork for cementitious material

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139667A (en) * 1983-04-28 1984-11-14 Alexander Wilson Wall block
EP0285518A2 (en) * 1987-04-01 1988-10-05 Le Groupe Maxifact Inc. Module sections, modules and formwork for making insulated concrete walls
WO1992010623A2 (en) * 1990-12-06 1992-06-25 Chadwick Arthur John Mackenzie Improvements in or relating to accommodation modules
FR2711706A1 (en) * 1993-10-22 1995-05-05 Heraklith Baustoffe Ag Formwork system for a concrete cladding structure.
FR2740488A1 (en) * 1995-10-27 1997-04-30 Stradal Sa Concrete cladding blocks for walls
EP1876309A1 (en) * 2006-07-06 2008-01-09 Stamford Consulting Limited Block assembly for buildings and relevant manufacturing method
WO2015164332A1 (en) * 2014-04-23 2015-10-29 Blum Kurt E Block and foam wall system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139667A (en) * 1983-04-28 1984-11-14 Alexander Wilson Wall block
EP0285518A2 (en) * 1987-04-01 1988-10-05 Le Groupe Maxifact Inc. Module sections, modules and formwork for making insulated concrete walls
EP0285518A3 (en) * 1987-04-01 1989-03-22 Le Groupe Maxifact Inc. Module sections, modules and formwork for making insulated concrete walls
WO1992010623A2 (en) * 1990-12-06 1992-06-25 Chadwick Arthur John Mackenzie Improvements in or relating to accommodation modules
WO1992010623A3 (en) * 1990-12-06 1992-09-03 Chadwick Arthur John Mackenzie Improvements in or relating to accommodation modules
FR2711706A1 (en) * 1993-10-22 1995-05-05 Heraklith Baustoffe Ag Formwork system for a concrete cladding structure.
BE1008860A5 (en) * 1993-10-22 1996-08-06 Heraklith Holding Ag Formwork system for concrete work.
FR2740488A1 (en) * 1995-10-27 1997-04-30 Stradal Sa Concrete cladding blocks for walls
EP1876309A1 (en) * 2006-07-06 2008-01-09 Stamford Consulting Limited Block assembly for buildings and relevant manufacturing method
WO2015164332A1 (en) * 2014-04-23 2015-10-29 Blum Kurt E Block and foam wall system

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee