CONSTRUCTION BLOCK AND MANUFACTURING METHOD

Abstract

 A construction component (1) for building walls, comprises a supporting block (2) of concrete and a lattice (3) comprising a number of intersecting lattice wires (15). The lattice (3) is arranged to enclose a volume on one side of the supporting block (2), such that the volume is fillable with lumps of a loose, solid material. At least one of the outermost wires (6) is arranged inside the concrete and aligned with an adjacent surface of the supporting block (2).
A method of manufacturing a construction component comprises the steps of: manufacturing a lattice (3); permanently bending one or more end areas (3b, 3c); filling a block-shaped mould (9) with wet concrete; arranging the lattice (3) on the mould (9); letting the concrete cure into a concrete block (2); and filling a volume between the lattice (3) and the concrete with a loose, solid material. The transversal side areas of the lattice (3) extend into the mould (9), below a fill line (11).

Description

Field of the invention

[0001] The present invention relates to a construction component for building walls, comprising a supporting block of concrete and a lattice comprising a number of intersecting lattice wires, the lattice being provided with side areas thereof, arranged to enclose a volume on one side of the supporting block, between the lattice and an adjacent surface of the supporting block, such that the volume is fillable with lumps of a loose, solid material

[0002] The invention also relates to a method of manufacturing a construction component, comprising the following steps: manufacturing a lattice from intersecting lattice wires; permanently bending one or more end areas of the lattice wires to form a lattice with at least one side area extending transversally to a main area; filling a block-shaped mould with wet concrete to a fill line; arranging the lattice on the mould, so that a space forms between the lattice and the concrete; letting the concrete cure into a concrete block; and filling the volume between the lattice and the concrete with lumps of a loose, solid material.

Background

[0003] FR2897375 discloses a construction block comprising concrete and a front lattice section wherein a filling material, such as stones, is placed. One advantage of such a construction is that there is a limited need for finding stones of a suitable size and colour, since the largest part of the construction block is made of concrete. The lattice section is a closed space, and the construction block is manufactured as an integral piece by placing the lattice at the bottom of a mould, arranging stones thereon, placing a separation layer on the stones, and then casting the concrete.

[0004] A disadvantage of the prior art according to FR2897375 is that the resulting construction block may be quite heavy, which is a disadvantage during transportation thereof. The configuration of the construction block prohibits transportation thereof if bulk; the blocks need to be arranged with care, and their measurements may not always be suitable for the available transportation means. Hence they may be bulky, and their transportation space-demanding and expensive. Also, the possibilities of rearranging or recycling the materials of the construction block are limited.

Summary

[0005] It is an object of the present invention to solve, or at least mitigate, parts or all of the above-mentioned problems. To this end, at least one of the wires is arranged inside the concrete and aligned with the adjacent surface of the supporting block.

[0006] Hereby an adequately strong connection may be formed between the concrete and the lattice. The bond between the concrete and the metal of the lattice is strong enough to allow the lattice to support a distributed load resulting from a filling with stones. In case of recycling the components of the construction block, the lattice wires may be loosened from the concrete by the application of more concentrated loads.

[0007] In an embodiment of the disclosure, the wires aligned with the adjacent surface are arranged on an edge of each of the side areas of the lattice.

[0008] Hereby the connection between the lattice and the concrete may be adequate for a complete filling of the space between the lattice and the concrete.

[0009] In some embodiments, the lattice is provided with a longitudinal opening along one of its side edges, such that the enclosed volume has an opening for the filling of the volume.

[0010] Hereby one side of the lattice, preferably the side intended to face upwards, may be open, so that the space enclosed by the lattice may be fillable after the concrete block has been cast and also easy to empty. This has at least two advantages. Firstly, the lattice space need not be filled until is has been positioned in its final position or close thereto, thereby reducing the need for transport of unnecessarily heavy construction blocks. Secondly, it is possible to empty the lattice space without breaking the concrete and reuse or recycle the construction block elsewhere.

[0011] In some embodiments the supporting block has a number of projections and recesses, arranged such that two or more of the construction components are at least partly nestable and positionable relative to one another.

[0012] Hereby the construction blocks may contribute to a stable formation of walls, roadsides, bridges etc. The positioning of the construction blocks relative to one another may be more exact, and their mutual contact areas may be enlarged.

[0013] A particular advantage is that durable sheets of e. g. a rubber material or a fibre material may be clamped between two construction blocks and extend into a soil bank behind the construction blocks. The sheets are designed to further enhance the stability of the landscape construction, by providing a link between the construction blocks and the soil which they are holding back. The arrangement of the projections and corresponding recesses improves the clamping function of such sheets, or similar anchoring devices, since they may be deformed by the projections and recesses. The contact area between the sheets and the construction blocks is enlarged, and the risk that the sheets may come loose is minimized.

[0014] In some embodiments a number of hooks extend transversally between the lattice and the supporting block to keep the lattice at a predetermined distance from the supporting block.

[0015] Hereby the shape of the lattice may be kept intact, even when the space between the lattice and the supporting block is filled with lumps of a loose solid material such as stones. The wires in the lattice may be kept from deflecting outwards, and the shape of the enclosed space is kept intact, even when a heavy material is deposited in the space.

[0016] In some embodiments the side areas of the lattice are angled inwards, forming an acute angle with a main area of the lattice.

[0017] Hereby the lattice may obstruct a view of the joints between the construction blocks in a front view. The lattice, or the material in the space within, appears more or less continuous, which may give a landscape construction including the construction blocks an aesthetically pleasing appearance.

[0018] In a second aspect of the disclosure, the method of manufacturing the construction block comprises that the transversally extending side areas of the lattice are arranged to extend into the mould with a wire extending aligned with the fill line at a distance below said fill line.

[0019] Hereby an adequately strong connection may be formed between the concrete and the wire. The bond is strong enough to allow the support a distributed load resulting from filling the space in the construction block with stones or some other loose material. In case of later recycling the components of the construction block, the wires may be loosened from the concrete by the application of more concentrated loads.

[0020] In some embodiments of the second aspect, one wire in each transversally extending side area of the lattice protrudes outside a cavity in the mould, such that the lattice is supported on the sides of the mould, when the lattice is arranged thereon.

[0021] Hereby an alignment with the surface of the concrete of the wire or wires extending below the surface may be attained. Also, the distance below the fill line, that the wire or wires are arranged, may be determined with precision.

[0022] In further embodiments the protruding wires are positioned in notches in the sides of the mould.

[0023] Hereby the position of the wire or wires and of the lattice as a whole may be determined with a higher degree of precision. Also, if the mould needs to be lightly shaken, in order to remove air pockets or bubbles from the concrete, the lattice may remain in its position. Accidental impacts on the mould may in most cases not affect the position of the lattice. Further the need for making measurements and for fixation of the lattice during the casting and curing of the concrete is minimized. Hence the casting need not be performed by highly skilled workers. The casting may also be performed at the building site or close thereto, thereby reducing the need for transport of heavy and bulky goods.

[0024] In some embodiments the side areas of the lattice are bent to form an acute angle with the main area.

[0025] Hereby a lattice is formed with a main area which is outwardly facing from the construction block, and the sides of the lattice are angled outwards from the centre of the supporting block. The main area is corresponding to the area of the front of the supporting block or slightly smaller, whereas the lattice wires are anchored in the supporting block inside the front area of the supporting block. The lattice wires are hence anchored in the supporting block without extending outside the lateral sides of the supporting block. The outwards angled sides of the lattice have the effect that the main area of the lattice, facing forward, may extend over all of the front of the supporting block. This means that the edge areas of the supporting block may be obscured from view for a viewer standing in front of the construction block or blocks. Where several construction blocks are arranged next to one another or in tiers, they may give the impression of a continuous lattice area or a continuous area of the material in the space behind the respective lattices.

[0026] In some embodiments the lattice and the concrete block are premanufactured at a location separate from where the volume between the lattice and the concrete block is filled.

[0027] Hereby the production may be performed close to or on the building site or at any place which is suitable for an effective distribution of the concrete block with the lattice. The space inside the lattice may likewise be filled at any suitable place, in order to minimize the transportation of the filling material as well as of the resulting construction blocks.

[0028] In some embodiments hooks are arranged hanging from the lattice a distance into the mould below the fill line, before the concrete in the mould cures into a concrete block.

[0029] Hereby a number of hooks may be anchored in the concrete block with a minimal manufacturing effort. For a secure anchoring, it is preferable that the hooks are long enough to extend a sufficient distance below the fill line, such that they are in contact with the concrete over a considerable distance. By a secure anchoring, the hooks may be able to keep the lattice from deflecting outwards when the space behind it is filled with the solid, loose material, such as stones.

[0030] In some embodiments the end areas of the lattice wires are bent before the lattice is manufactured.

[0031] Hereby is accomplished an alternative method of manufacturing the lattice. In some embodiments of the disclosure the material or the thickness of the lattice wires may be such that they need unusually high bending forces. In some embodiments the finished lattice may be of such a size that ordinary bending equipment would be insufficient for bending the edge areas of the lattice in a single operation. In these cases bending the individual wires separately and then joining them, e. g. by welding, is a preferable method of manufacturing the lattice.

[0032] It is noted that embodiments of the invention may be embodied by all possible combinations of features recited in the claims. Further, it will be appreciated that the various embodiments described for the device are all combinable with the method as defined in accordance with the second aspect of the present invention, and vice versa.

Brief description of the drawings

[0033] The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and nonlimiting detailed description of preferred embodiments of the present invention, with reference to the appended drawings, where the same reference numerals will be used for similar elements, wherein:

Fig. 1a

is a view in perspective of a construction block according to the disclosure;

Fig. 1b

is a schematic view from the side of the construction block according to Fig. 1a;

Fig. 1c

is a schematic view from above of the construction block according to Fig. 1a;

Fig. 2a

is a side view of a lattice in a construction block according to the disclosure;

Fig. 2b

is a view from above of the lattice according to Fig. 2a;

Fig. 3

is a view in perspective of a mould for a construction block according to the disclosure with a lattice mounted thereon;

Fig. 4

is a section through the mould and the lattice according to Fig. 3; and

Fig. 5

is a view from the side of a hook included in some embodiments of the disclosure.

[0034] All the figures are schematic, not necessarily to scale, and generally only show parts which are necessary in order to elucidate the embodiments, wherein other parts may be omitted.

Detailed description of the exemplary embodiments

[0035] Fig. 1a illustrates a construction block 1 according to the present disclosure. The construction block 1 may be used for landscape construction, e. g. in the building of roads, walls, banks, bridges, etc. Typically, a number of construction blocks 1 are arranged next to one another or in tiers, in order to form a solid wall to stabilize soil which has been arranged in a particular formation. Sometimes the construction blocks 1 are arranged on their own to form detached walls, partitions, etc. The size of the blocks may be varied, but the lengths of their sides usually fall within the range of 0.5 to 2 metres.

[0036] Each of the construction blocks 1 comprises a solid support block 2 which in most embodiments is formed from a solid, cast material, such as concrete. At one side of the support block 2, there is a lattice 3 enclosing a space or volume 5, between the lattice 3 and an adjacent surface 18 of the support block 2. Lumps of a solid material may be arranged in the space 5, to form a decorative front. Preferably the space 5 is arranged on one of the largest lateral sides of the support block 2. The lattice 3 comprises a large number of crosswise extending wires 15, some of which will be discussed in particular below. The wires 15 may be welded together where they cross.

[0037] The upper side of the support block 2, as seen in Fig. 1, comprises a number of protrusions 4, which are nestable in corresponding recesses in the bottom side (not seen in the figures) of the support block 2. The protrusions 4 disclosed in the drawings are just one example of many possible embodiments. The size and shape of the protrusions 4 and their corresponding recesses may vary widely. They may be symmetrical or non-symmetrical, extending in the longitudinal direction of the support block 2 or more or less transversally thereto. In some embodiments the protrusions 4 may even be arranged on the bottom side of the support block 2, and the recesses may be arranged on the upper side thereof. The matching protrusions 4 and recesses may be utilized for clamping a web or a sheet of a suitable material, further extending into the soil next to the construction blocks.

[0038] The lattice 3 comprises a main area 3a, which is arranged approximately parallel to the adjacent front surface 18 of the support block 2 at a distance therefrom, such that the space 5 is formed between the main area 3a and the support block 2. The lattice 3 is bent to form two lateral sides 3b, approximately transversal to the main area 3a. Fig. 1b shows one of the lateral sides 3b of the lattice 3. The edge of the lateral side 3b of the lattice 3 extends into the support block 2. One of the wires 6 on the edge on the lateral side 3b of the lattice 3 is arranged along the front side of the support block 2, embedded in the material of the support block 2, at an approximately constant distance from the adjacent surface 18 of the support block 2.

[0039] The lattice 3 also has a bottom side 3c, approximately transversal to both of the main area 3a and the lateral sides 3b. In Fig 1b it may be recognised that the bottom side 3c is angled slightly downwards from the support block 2. The outer edge 7 of the bottom side 3c is arranged approximately at the level of the bottom side of the support block 2. Preferably it does not extend below this level, since there is a desire to make the construction blocks 1 completely stackable. In order to keep the blocks 1 from interfering with parts of other blocks, the lattice 3 of each block 1 must not extend outside of the upper, lower or lateral sides of the support block 2. By the same token, the lateral sides 3b of the lattice 3 do not extend outside of the lateral sides of the support block 2, as seen in Fig. 1c.

[0040] The main area 3a preferably extends in front of the adjacent surface 18 to as large an extent as possible. The adjacent surface 18 may only be slightly visible, or even not at all visible, at the outer edges of the construction block 1, when viewed from the front. In order to accomplish this visually pleasing effect, the lateral sides 3b and the bottom side 3c of the lattice 3 are bent to form acute angles to the main area 3a of the lattice 3. The edges of the lateral and bottom sides 3b, 3c are arranged within the perimeter of the main area 3a. Hence the lateral and bottom sides 3b, 3c are inclined inwards from the outer edges 7 of the main area 3a to the wires 6 at the edges of the lateral and bottom sides 3b, 3c of the lattice 3. The wires 6 at the edges of the lateral and bottom sides 3b, 3c of the lattice 3 may be securely anchored in the concrete of the support block 2 at some distance from the lateral and lower sides of the support block 2.

[0041] The upper, longitudinal side 16 of the lattice 3, opposite to the bottom side 3c, is open, such that a loose, solid material may be deposited into the space 5 inside the lattice 3.

[0042] The loose, solid material may be stones, often of a size larger than the mesh size of the lattice 3. Other materials may be crushed bricks, glass, or ceramics, etc, in particular if a decorative effect is desired. Materials of a small particle size, e. g. sand, gravel, or soil, may be deposited inside the lattice 3, if a sheet of material with a small mesh size is used for keeping the small particles from escaping through the larger meshes of the lattice 3. One example of a sheet material with a small mesh size may be burlap, and the material of a small particle size therein may be soil. Holes may be cut in the burlap for planting plants that may grow to cover the lattice 3 in part or fully.

[0043] The projections 4 have the shape of cropped pyramids in the embodiment shown in Figs. 1a-1c. The corresponding recesses, which are not seen in the figures, have a complementary shape. The slanting sides 4a of the projections 4, and of the recesses, may have a guiding function, when the construction blocks 1 are stacked. Slight misalignments of the projections 4 and the recesses will be compensated by the slanting sides 4a. On a mutual contact between at least one slanting side of at least one projection 4 with at least one slanting side of a recess, a construction block 1 will slide into its intended position when it is lowered onto another construction block 1, with at least a moderately correct positioning. The side edges 4b between two adjacent slanting surfaces 4a may assist in preventing that an upper construction block 1 is rotated relative to a lower construction block 1, whereon it is placed, by a similar type of guiding function.

[0044] Each lateral side 3b of the lattice 3 is provided with a supporting wire 8 which protrudes a short distance outside of the lattice 3 at both its outer ends 8a, 8b, as seen in Fig. 2a. These supporting wires 8 have their main function during the manufacture of the construction block 1. During the casting of the support block 2 in a mould 9 (see Figs. 3 and 4), the lattice 3 may be placed at the top of the mould 9, with the outer ends 8a, 8b of the supporting wire 8 protruding so far that they may be placed on the edges of the mould 9. Parts on the outer edge of the lattice 3 may extend into the mould 9, such that the outermost wire 6 in each lateral side 3b and in the bottom side 3c (see Fig. 2b) of the lattice 3 may be covered by the liquid concrete poured into the mould 9. The lattice 3 may hereby be solidly joined with the support block 2, when the concrete has cured.

[0045] A perspective view of a mould 9 according to an embodiment of the disclosure may be seen in Fig. 3. The mould 9 has the general shape of a rectangular prism wherein two of the sides are profiled for forming the protrusions 4 and recesses of the finished support block 2 as well as bevelled edges, which are present in at least some of the embodiments of the construction block 1. During the casting of the support block 2, it is turned over so that its top and bottom sides, with the protrusions 4 and corresponding recesses, are facing sideways.

[0046] The outer sides of the mould 9 are provided with stiffening ridges 10, to keep the sides of the mould 9 from bulging when it is filled with concrete.

[0047] In Fig. 3, the lattice 3 has been positioned on the upwardly directed edges of the mould 9. The outer ends 8a, 8b of the supporting wires 8 extend outside of the upper opening of the mould 9, such that the lattice 3 may be kept in its position on top of the mould 9, and not fall into it.

[0048] In some embodiments there may be notches 17 in the side edges of the mould 9, to make sure that the lattice 3 stays aligned in its position. In case of accidental jolts to the mould 9 or a deliberate shaking thereof to settle the concrete, the notches 17 may be sufficient to keep the lattice 3 in its position.

[0049] The outermost wires 6 at the edges of the lateral and bottom sides 3b, 3c of the lattice 3, are arranged at a distance below the supporting wires 8, which keep the lattice 3 in its position on the mould 9. Hence the lattice 3 extends into the mould 9 with its lateral and bottom sides 3b, 3c, and its outermost wires 6 are positioned below an intended fill line 11 see Fig. 4) for the concrete. They are arranged such that they may be approximately aligned with the surface of the concrete, when the mould 9 has been filled with wet concrete, provided that the mould 9 is positioned on an approximately planar and level surface. When the concrete has cured, the outermost wires 6 of the lattice 3 may be embedded in the concrete, and the lattice 3 may be securely fastened to the front side of the support block 2, along the side and bottom edges thereof, and at a sufficient distance therefrom to ensure that loads on the lattice 3 may not break the edges nor the lateral sides 19 of the support block 2.

[0050] Fig. 4 shows, in a different, sectional view, the arrangement of the lattice 3 on the mould 9. The fill line 11 is suggested with a dashed line at a position above the outermost wire 6 which is to be embedded in the concrete. The fill line 11 is not higher than the upper edge of the mould 9, where the supporting wire 8 is positioned.

[0051] Also in Fig. 4, it is clear that the bottom side 3c is angled in a direction outwards from the centre of the mould 9, which means that it may be angled outwards from the centre of the support block 2. The lateral sides 3b may be angled outwards in a similar manner, as discussed above. Very little of the support block 2 may hence be visible in a view from the front of the finished construction block 1, when the filling material has been placed inside the lattice 3.

[0052] Further, Fig. 4 shows that the side of the lattice 3 opposite the bottom side 3c is open. In a position of use, this open side 16 may be directed upwards, so that the loose, solid material may be easily placed inside the lattice 3 at any time after the concrete of the support block 2 has cured.

[0053] Since the loose filling material need not be positioned inside the lattice 3 at the time of manufacturing the lattice 3 nor at the time of casting the support block 2, these steps of the manufacture of the construction block 1 may be performed separately from one another, in the most practical manner. The separation of the steps may be with respect to time or location, or both. Costs for long transports of heavy goods and costs for storing the partially, or completely, finished goods may be reduced. Each step of the manufacture may be performed at a time and place which is most efficient, which means that the filling of the material inside the lattice 3 may, e.g., be performed at the construction site, shortly before the construction block 1 is placed in its final position.

[0054] The construction blocks 1 may be provided with further lattices in addition to the lattice 3 which extends into the support block 2 as described above. Such further lattices may be fastened on any lateral side or top side of the support block 2. They may be fastened by conventional fastening means, such as screws or bolts. Lumps of solid material etc., as described above, may be arranged in a space between the support block 2 and the lattice. Various decorative effects may hereby be attained.

[0055] Depending at least partially on the density and unit size of the loose, solid material, as well as on the mesh size and other dimensions of the lattice 3, the wires 15 of the lattice 3 may be subjected to deflections, in particular a bulging of the main area 3a of the lattice. In order to prevent such deformations, which may give an unfavourable appearance of the construction blocks 1, one or more hooks 12, as seen in Fig. 5, may be arranged between the main area 3a and the support block 2. Preferably the hooks 12 may be arranged at the time of casting the support block 2, such that the hooks 12 may be anchored in the concrete, in a similar manner to the wires 6 at the edges of the lattice 3.

[0056] Each hook 12 may be arranged to hang by an end portion 14 from the main area 3a of the lattice 3 in at least one place, but preferably in several places. By arranging the hooks 12 at intersections of two wires 15 in the lattice 3, one single hook 12 may keep two wires 15 from deflecting in one area of the lattice 3a. The distances between the hooks 12 may be decided according to experience. They may also be calculated based on one or more of the following: an expected load on the wires 15, the dimension of the wires 15, the maximally acceptable deflection, the dimensions of the hook 12, the expected embedding of the hook 12 in the concrete as well as the adhesion of the concrete to the hook 12.

[0057] The hooks 12 may be arranged hanging from the wires 15 in the main area 3a of the lattice 3, when the lattice 3 is arranged on the mould 9. The hooks 12 extend at least as low as the outermost wires 6 that are to be embedded in the concrete, preferably lower. When the wet concrete is poured, the lower portions 13 of the hooks 12 may be covered. After the curing of the concrete, the hooks 12 may be fixed in their respective positions, thereby keeping the distance between the adjacent surface 18 of the concrete and the lattice 3. The wires 15 of the lattice 3 may be kept from deflecting, even when the space 5 between the support block 2 and the lattice 3 is filled with stones, etc.

[0058] The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

[0059] In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality.

Claims

1. Construction component (1) for building walls, comprising a supporting block (2) of concrete and a lattice (3) comprising a number of intersecting lattice wires (15), the lattice (3) being provided with side areas (3b, 3c) thereof, arranged to enclose a volume on one side of the supporting block (2), between the lattice (3) and an adjacent surface (18) of the supporting block (2), such that the volume is fillable with lumps of a loose, solid material, wherein at least one of the wires (6) is arranged inside the concrete and aligned with the adjacent surface (18) of the supporting block (2).

2. Construction component (1) according to claim 1, wherein the wires (6) aligned with the adjacent surface (18) are arranged on an edge of each of the side areas (3b, 3c) of the lattice (3).

3. Construction component (1) according to claim 1 or claim 2, wherein the lattice (3) is provided with a longitudinal opening (16) along one of its side edges, such that the enclosed volume has an opening for the filling of the volume.

4. Construction component (1) according to any of the preceding claims, wherein the supporting block (2) has a number of projections (4) and recesses, arranged such that two or more of the construction components (1) are at least partly nestable and positionable relative to one another.

5. Construction component (1) according to any of the preceding claims, wherein a number of hooks (12) extend transversally between the lattice (3) and the supporting block (2) to keep the lattice (3) at a predetermined distance from the supporting block (2).

6. Construction component (1) according to any of the preceding claims, wherein the side areas (3b, 3c) of the lattice (3) are angled inwards, forming an acute angle with a main area (3a) of the lattice (3).

7. A method of manufacturing a construction component, comprising the following steps:

- manufacturing a lattice (3) from intersecting lattice wires (15);

- permanently bending one or more end areas (3b, 3c) of the lattice wires (15) to form a lattice (3) with at least one side area (3b, 3c) extending transversally to a main area (3a);

- filling a block-shaped mould (9) with wet concrete to a fill line (11);

- arranging the lattice (3) on the mould (9), so that a space forms between the lattice (3) and the concrete;

- letting the concrete cure into a concrete block (2);

- filling the volume between the lattice (3) and the concrete with lumps of a loose, solid material;

wherein the transversally extending side areas of the lattice (3) are arranged to extend into the mould (9) with a wire (6) extending aligned with the fill line (11) at a distance below said fill line (11).

8. The method according to claim 7, wherein one supporting wire (8) in each transversally extending side area of the lattice (3) protrudes outside a cavity in the mould, such that the lattice (3) is supported on the sides of the mould (9), when the lattice (3) is arranged thereon.

9. The method according to claim 8, wherein the protruding wire ends (8a, 8b) are positioned in notches (17) in the sides of the mould (9).

10. The method according to any of claims 7 to 9, wherein the side areas (3b, 3c) of the lattice (3) are bent to form acute angles with the main area (3a).

11. The method according to any of claims 7 to 10, wherein the lattice (3) and the concrete block (2) are premanufactured at a location separate from where the volume between the lattice (3) and the concrete block (2) is filled.

12. The method according to any of claims 7 to 11, wherein hooks (12) are arranged hanging from the lattice (3) a distance into the mould (9) below the fill line (11), before the concrete in the mould (9) cures into a concrete block (2).

13. The method according to any of claims 7 to 12, wherein the end areas of the lattice wires (15) are bent before the lattice (3) is manufactured.

Drawing