WO1995000711A1

WO1995000711A1 - Building process and means for performing same

Info

Publication number: WO1995000711A1
Application number: PCT/SE1994/000557
Authority: WO
Inventors: Håkan AALTONEN; Roland Lennartsson
Original assignee: Aaltonen Haakan; Roland Lennartsson
Priority date: 1993-06-22
Filing date: 1994-06-09
Publication date: 1995-01-05
Also published as: SE501281C2; DE4494455T1; AU7087394A; SE9302151D0; SE9302151L

Abstract

The present invention refers to a method to provide a building foundation slab of mouldable building materials with a remaining insulating mould extending along the circumference of said intended slab. According to the invention, on an underlay (5) about said intended circumference of the slab, bottom parts (6) are set out, which consist of heat insulating material, preferably cellular plastic, and which exhibit a groove (7) extending along the upper side of the bottom parts, whereupon vertical base parts (8), which consist of heat insulating material, preferably cellular plastic, are located such that they can be installed on top of the bottom parts (6) and the groove belonging thereto and connects said base parts (8) and bottom parts (6) to each other by fastening means (9). Fastening means (9) is received with one portion in said bedding groove (7) and by cooperation also with the base part (8), the parts (6, 8) are held to each other. The invention also refers to means to carry out the method.

Description

Building process and means for performing same

The present invention refers to a method to provide a building foundation slab of mouldable building materials with a remaining insulating mould extending along the circumference of said intended slab, which mould consists of edge beams of heat insulating material, and with heat insulation extending along the lower part of the edge beam.

Foundation by means of an edge beam forming mould consisting of heat insulating material and moulding of a concrete foundation slab inside the mould is known since long. However the edge beams exhibit such configuration that they are difficult to handle rationally at transport and storing and also to be easily set out on the building premises without for example to blow away before the casting of the foundation slab has completely been carried out. It is for instance expensive to let store and transport edge beams, whose form is such that superfluous protrusions and the like are present on the edge beam, since these form unwanted air space between themselves at said handling before the setting out. Loose plates, which are intended to form vertical edge beam moulds, have earlier not been possible to be used rationally due to difficulties of fastening them to a bottom layer in a secure and simple way.

The main object with the present invention is con¬ sequently at first hand with simple and well functioning means to solve said problem through a method, which is suitable for this.

Said object is achieved by means of a method accor¬ ding to the present invention, which mainly is characterized therein, that on an underlay about said intended circumference of the slab, bottom parts are set out, which consist of heat insulating material, preferably cellular plastic, and which exhibit a groove extending along the upper side of the bottom parts, whereupon vertical base parts, which consist of heat insulating material, preferably cellular plastic, are located such that they can be installed on top of the bottom parts and the groove belonging thereto and connects said base parts and bottom parts to each other by means of fastening means, which with one portion is received in said bedding groove and which by cooperation with the base part holds the parts to each other by placing the lower portion of respective base part received in the bedding groove with the base parts extending row like, and by means of a fastening band receivable in said groove between one vertical side of the base part and a groove side wall the parts are connected to each other, whereafter the slab is cast.

An additional purpose of the present invention is to provide a means, which enables to simply and efficiently be used to carry out such a method according to the present in¬ vention.

Said further purpose is achieved by means according to the present invention, which mainly is characterized the¬ rein, that bottom parts which consist of heat insulating material, preferably cellular plastic, exhibit a groove, the width thereof either exceeding the thickness of a base part receivable in said groove, that base parts, which exhibit a thickness at the lower part falling below a width of the bottom part groove preferably is smooth on its underside, that faste- ning means is provided which may be received in said groove and which may cooperate with a bottom part and a base part at the same time, and that band shaped wedges of plastic material, preferably consisting of extruded polystyrene, form said faste¬ ning means . The invention is described in the following as a preferred embodiment, whereby is referred to the enclosed drawings, in which

Figure 1 shows a sectional view of a portion of a building foundation with illustrated edge beam structure, Figure 2 shows a more detailed view of a building foundation and parts of a building as well as the ground and the insulation,

Figure 3 shows a plan view of a base part, Figure 3A shows an end view of a base part, Figure 4 shows a plan view of an edge beam bottom part,

Figure AA shows an end view of said bottom part, Figure 5 shows a plan view of a joint between interconnected base parts,

Figure 5A shows an end view of interconnected base parts as well as a bottom part, Figure 6 shows a plan view of a corner area of the foundation mould,

Figure 7 shows examples of corner staying, Figure 8 shows a plan view of a foundation mould with inwards turned corner, and Figure 9 and 10 show perspective views of an interconnected base part and an beam lower part of an edge beam, seen from different sides from the inside and from the outside respectively.

A method to provide a building foundation slab 1 of mouldable building materials, such as concrete, with a mould 2 that consists of edge beams 3 of heat insulating material, which extends along the circumference of a foundation slab 1 mentioned above and which is intended to remain during and after the moulding stage of the foundation slab 1 and which is also provided with heat insulation 4 extends along the lower part 3A of the edge beam, includes that one places the edge beam 3 and its underlying heat insulation 4 in a special way and connects these with each other.

More specifically the method implies that for in- stance, on a well smoothed out and compressed ground 5 or other appropriate bottom layer about the intended circumference of the said slab one sets out preferably disc-shaped bottom parts 6 which consist of heat insulating material, preferably cellu¬ lar plastic with appropriate thickness, such as for instance expanded polystyrene (EPS). According to the invention said bottom parts 6 exhibits a groove 7, 7', which extends along the upper side 6A of the lower parts . Further the method according to the invention includes placing vertical base parts 8 thereon functioning as edge beams, which consist of heat insulating material, preferably cellular plastic according to above, to be installed on top of said bottom parts 6 and their fitting groove 7, 7' . One connects said base parts 8, and bottom parts 6, to each other by fastening means 9 , of a special type.

Said fastening means 9, are intended by means of a portion 9A, to be received in said bedding groove 7. Through further cooperation of the fastening means with the base part 8, the fastening means 9 holds the parts 6, 8 steady to each other and prevents these from falling over or being dislodged in another non desired way.

According to a preferred embodiment of the invention, which is shown in the drawings in figure 1-10, the lower portion 8A of respective base part 8 received in the bedding groove 7 is placed with the base parts 8, 8 ... extending row like and with the support surface 12 of the base parts resting against the bottom surface 13 of the groove.

By means of a fastening means shaped as a fastening band 9, which is receivable in said groove 7 in a slot 10 which is formed between one of the base parts, preferably the outer vertical side 8B, and a vertical groove side wall 7A, the parts 6, 8 are connected to each other.

By wedging the fastening band 9, which may consist of plastic material, against the external outside 8B of the base parts provided with facing material 11, an efficient holding is achieved.

Means for accomplishing a method for foundation slab production according to the above includes bottom parts 6 of various types, but which consists of heat insulating material, preferably cellular plastic, and which preferably are disc shaped, which however can have other shapes, for instance board shape, transverse discs, beams etc.

According to the embodiment, respective bottom parts 6 exhibit a groove 7, the width A of which exceeds the thick¬ ness B at the lower portion of a base part 8, which may be received in said groove 7.

According to the example, Figure 1-10, base parts 8, the lower portion thickness B of which thus falls below the width A of a bottom part groove 7, preferably exhibit smooth undersides 12.

In addition there is provided fastening means 9 according to above said, which is receivable in said respective groove 7 and which can cooperate with a bottom part 6 and a base part 8 at the same time for efficient holding of the parts 6, 8 to each other as an assembled unit after the mounting. According to the example the bottom parts 6 can be disc shaped with appropriate thickness, width and length, for instance 150 x 1000 x 2400 mm, to be adapted to easy trans¬ portation. In order to enable joining of two walls crossing each other in angle and base parts 8, the bottom parts 6 may exhibit two grooves 7, 7' crossing each other to form a so called T-crossing. The longitudinal groove 7 of a bottom part 6 is suitably displaced towards its external long side 6B, while a crossing groove 7' is displaced towards one short side 6C of the bottom part. A base part 8, which likewise can be disc shaped, suitably exhibits an external surface layer 11, preferably fibre reinforced thin plaster or other endurable rough surface coating.

The band shaped wedge 9 which can be pressed down in the groove slot 10 externally about a base part 8, which may consist of plastic material, preferably extruded polystyrene, is efficienty held through cooperation with said rough surface layer 11 in one direction and with the groove side wall 7A in the other direction, whereby it efficiently is retained in the groove 7 and holds the base 8 in the groove 7. The base parts 8 at the casting occasion of the slab 1 are thereby prevented to be influenced by the great moulding mass in a negative way, thus the base parts 8 resist the great lateral pressure and is prevented from falling to the side outwards. In the purpose of leading down load from the facing material on the top the base parts 8, a method being known per se, these parts may exhibit recesses 14 along their upper edge and inner side, and in which concrete bosses 14' are cast at the same time as the foundation slab 1 is cast. In the bottom of the broader grooves 7 drainage in the shape of for instance holes 15 are provided to carry off possible moisture and fluid, which can penetrate into the groove to underlying ground 5.

Moisture can also flow off through the open ends 7B, 7C. There is no risk that moisture penetrates into the inside of the foundation past the base 8, since there is formed an efficient threshold of the groove 7 and water is thereby pre¬ vented from flowing upwards .

Joining of base parts 8 arranged in row shape can be carried out by means of joint plates 16 according to a known method, which laterally and from the above is captured by said saddle like joint part.

Joining of corners can be carried out by corners base parts 8 being sawn out at an angle of 45° in an appropriate direction dependent on if it concerns an outside corner 17 (Figure 6) or an inside corner 18 (Figure 8), whereafter a wedge 19, 20 is sawn out from the base part material to enable forming of a concrete boss 21 at the slab casting.

At outside corners 17 the base parts 8 temporarily can be supported with a board 22 according to Figure 7 and are tightened against a ground connected pole 23, but this is not absolutely necessary.

A consequently efficient functioning and simply constructed building foundation is made possible to be provided owing to the invention and the elements included have such shape, that they are adapted to rational handling. In summary the foundation may be carried out according to the following:

The edge elements 3 are supplied to the building work place in two parts, a base part 8 and a bottom part 6.

The bottom parts 6 are set out on well levelled and packed drainage layer 5 and are fixed with pins 24, which may consist of plastic barbs and which are beat downwards into the ground 5. The setting out is finished in corners with bottom parts 6 of such length that transverse grooves 7 ' end up at the correct location in relation to transverse encountering bottom parts 6.

The base parts 8 are subsequently placed in fitting countersunk grooves 7,7' and are fastened with locking wedges 9. Important is that the joints 25 of the base parts 8 become displaced at least 900 mm in relation to the joints 26 of the bottom parts 6.

Joint plates 16 are clamped above the joints 25 of '^"> the base parts, but in the corners overarching V-shaped corner joint plates, not shown, are clamped down.

Cut out consoles 14, 19, 20 in the upper edge of the base parts and corners are moulded in connection with the remaining casting of the slab 1. 0 Concisely the foundation may consist of a concrete layer 27, reinforcement net 28, heat pipes 29, an upper cellu¬ lar plastic layer 30, a lower cellular plastic layer 31 and a drainage layer 32.

The invention is not limited to the embodiment described above and that shown in the drawings, but can be varied within the scope of the patent claims without departing from the inventive concept.

Claims

PATENT CLAIMS

1. A method to provide a building foundation slab (1) of mouldable building materials, with a remaining insulating mould (2) extending along the circumference of said intended slab, which mould consists of edge beams (3) of heat insulating material, and with heat insulation (4) extending along the lower part (3A) of the edge beam c h a r a c t e r i z e d therein, that on an underlay (5) about said intended circum¬ ference of the slab, bottom parts (6) are set out, which consist of heat insulating material, preferably cellular plas¬ tic, and which exhibit a groove (7,7') extending along the upper side (6A), of the bottom parts, whereupon vertical base parts (8), which consist of heat insulating material, prefe¬ rably cellular plastic, are located such that they can can be installed on top of the bottom parts (6) and the groove (7) belonging thereto and connects said base parts (8) and bottom parts (6) to each other by fastening means (9), which with one portion (9A) is received in said bedding groove (7) and which by cooperation with the base part (8) holds the parts (6,8) to each other by placing the lower portion (8A) of respective base part (8) received in the bedding groove (7) with the base parts (8) extending row like, and by means of a fastening band (9) receivable in said groove (7) between one vertical side (8B) of the base part and a groove side wall (7A) the parts (6,8) are connected to each other, whereafter the slab (1) is cast.

2. Method according to patent claim 1, c h a r a c t e r i z e d therein, that the fastening band (9), which consists of plastic material, is wedged against the outwards facing outside (8B) of the base parts provided with facing material (11).

3. Means for accomplishing the method to provide a building foundation slab (1) of mouldable building materials, with a remaining insulating mould extending along the circum¬ ference of said intended slab, which mould consists of edge beams of heat insulating material, and with heat insulation extending along the lower part of the edge beam , according to any of above stated claims, c h a r a c t e r i z e d therein, that bottom parts (6) which consist of heat insula¬ ting material, preferably cellular plastic, exhibit a groove (7), the width (A; I) thereof exeeding the thickness (B) of a base part (8) receivable in said groove (7), that base parts (8), which exhibit a thickness (B) at the lower part falling below a width (A) of the bottom part groove, preferably is smooth on its underside, that fastening means (9) is provided which may be received in said groove (7) and which may cooperate with a bottom part (6) and a base part (8) at the same time, and that band shaped wedges (9) of plastic material, preferably consis¬ ting of extruded polystyrene, form said fastening means.

4. Means according to patent claim 3, c h a r a c t e r i z e d therein, that the bottom parts (6), which are disc shaped, exhibit grooves (7, 7') crossing each other.

5. Means according to patent claim 4, c h a r a c t e r i z e d therein, that a longitudinal groove (7) of a bottom part (6) is displaced against its external long side (6B), while a crossing groove (7') is displaced against one short side (6C) of the bottom part.

6. Means according to any of the patent claims 3-5, c h a r a c t e r i z e d therein, that a base part (8), which is disc shaped, exhibits an external surface layer (11), preferably fibre reinforced thin plaster or other durable rough surface coating.

7. Means according to patent claim 6, c h a r a c t e r i z e d therein, that a base part (8) exhibits recesses (14) along its upper edge and inner side.