EP3983618B1

EP3983618B1 - Method for mounting a prefabricated construction element to another construction element and connection arrangement

Info

Publication number: EP3983618B1
Application number: EP20731524.3A
Authority: EP
Inventors: Jaakko YRJÖLÄ; Jan Bujnak; Johannes GREISEN
Original assignee: Peikko Group Oy
Current assignee: Peikko Group Oy
Priority date: 2019-06-14
Filing date: 2020-05-29
Publication date: 2023-07-26
Anticipated expiration: 2040-05-29
Also published as: EP3983618C0; CN114174610A; PL3983618T3; EP3983618A1; CN114174610B; WO2020249852A1; KR20220009418A; KR102619755B1; ES2961083T3; HUE063667T2

Description

Field

The invention relates to method for mounting a prefabricated construction element comprising concrete to another construction element as defined in the preamble of independent claim 1.
The invention also relates to a connection arrangement between prefabricated construction element comprising concrete and another construction element as defined in the preamble of independent claim 9
Document ITVR 20 100 206 A1 discloses a method according to the preamble of claim 1 and a connection arrangement according to the preamble of claim 9.

Objective

The object is to provide a method for mounting a prefabricated construction element comprising concrete to another construction element and a connection arrangement between prefabricated construction element comprising concrete and another construction element, which allows to open the connection between the prefabricated construction and the another construction element in such manner that the prefabricated construction element comprising concrete can easily be demounted and be reused so as to promote circular economy.

Short description

The method for mounting a prefabricated construction element comprising concrete to another construction element of the invention is characterized by the definitions of independent claim 1.
Preferred embodiments of the method are defined in the dependent claims 2 to 8.
The connection arrangement between prefabricated construction element comprising concrete and another construction element of the invention is correspondingly characterized by the definitions of independent claim 9 .
Preferred embodiments of the connection arrangement are defined in the dependent claims 10-16.
The prefabricated construction element comprising concrete can for example be any one of a prefabricated reinforced concrete column/pile/pillar, a prefabricated reinforced concrete beam and a prefabricated concrete wall element.
Said another construction element can also be a prefabricated construction element comprising concrete for example a prefabricated reinforced concrete column/pile/pillar. Alternatively said another construction element can be a cast-in-situ construction element comprising concrete such as a reinforced concrete foundation or a part belonging to a reinforced concrete foundation.

List of figures

In the following the method and the connection arrangement will described in more detail by referring to the figures, which

Figure 1 shows a first embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated reinforced concrete column and where the another construction element is in the form of reinforced concrete foundation,
Figure 2 shows a second embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated reinforced concrete column and where the another construction element is in the form of reinforced concrete foundation,
Figure 3 shows a third embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated reinforced concrete column and where the another construction element is in the form of reinforced concrete foundation,
Figure 4 shows a fourth embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated concrete wall element and where the another construction element is in the form of reinforced concrete foundation,
Figure 5 shows a fifth embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated concrete wall element and where the another construction element is in the form of reinforced concrete foundation,
Figure 6 shows a sixth embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated concrete wall element and where the another construction element is in the form of reinforced concrete foundation,
Figure 7 shows a seventh embodiment of the connection arrangement, where the prefabricated construction element is in the form of a prefabricated concrete beam and where the another construction element is in the form of prefabricated reinforced concrete column,
Figure 8 shows a step in a demounting process of the first embodiment of the connection arrangement shown in figure 1,
Figure 9 shows another step in the demounting process of the first embodiment of the connection arrangement shown in figure 1,
Figure 10 shows still another step in the demounting process of the first embodiment of the connection arrangement shown in figure 1,
Figures 11a to 11c shows further steps of the demounting process of the first embodiment of the connection arrangement shown in figure 1,
Figure 12 shows a separation means that is in the form of a non-perforated sheet, and
Figure 13 shows a separation means that is in the form of an expanded steel sheet.

Detailed description of the invention

First the method for mounting a prefabricated construction element 1 comprising concrete to another construction element 2 will be described in greater detail.
The prefabricated construction element 1 comprising concrete can for example be any one of a prefabricated reinforced concrete column/pile/pillar, as illustrated in figures 1 to 3, a prefabricated reinforced concrete beam, as illustrated in figure 7, and a prefabricated concrete wall element, as illustrated in figures 4 to 6.
Said another construction element 2 can also be a prefabricated construction element 1 comprising concrete for example a prefabricated reinforced concrete column/pile/pillar, as illustrated in figure 7. Alternatively said another construction element 2 can be a cast-in-situ construction element comprising concrete such as a reinforced concrete foundation or a part belonging to a reinforced concrete foundation, as illustrated in figures 1 to 6.
The method comprises a connecting step for connecting the prefabricated construction element 1 by means of repeatably openable and closable mechanical connection means 3 to said another construction element 2 so that a joint 4 is formed between the prefabricated construction element 1 and said another construction element 2 and so that the joint 4 is at least partly limited by the prefabricated construction element 1 and said another construction element 2.
The method comprises a grouting step for grouting the joint 4 by covering such as filling the joint 4 at least partly with grout 5 and allowing the grout 5 to harden.
The method comprises a coating step for coating surfaces 6 of the prefabricated construction element 1 that is to be covered by grout 5 in said grouting step at least partly with separation means 7 such as with anti-adhesion means prior said grouting step.
In the coating step can mechanical anti-adhesion means such as perforated or unperforated plates, sheets or films be used as separation means 7. As mechanical anti-adhesion means can for example be used an expanded steel sheet, a perforated steel sheet, a plate of polymer, a sheet of polymer, a film of polymer, a textile sheet, a fabric sheet, formwork liner, and wood such as coated plywood. An advantage that is achieved by using a perforated plate, sheet or a film as a separation means 7 is that the perforations allows for grout 5 to attach to the prefabricated construction element 1 through the separation means 7. This provides for a stronger connection between the grout 5 and the prefabricated construction element 1 while allowing for easy detaching of the prefabricated construction element 1 from the separation means 7 and from the grout 5.
In the coating step can anti-adhesion substances such as fluid for example oil, cementitious retarder, or carbon be used as separation means 7.
The coating step includes preferably, but not necessarily, providing for the coating step a separation means 7 that is a means separate from the prefabricated construction element 1, i.e. that does not form a part of the prefabricated construction element 1, and that is a means separate from said another construction element 2, i.e. that does not form a part of said another construction element 2.
The separation means 7 is preferably, but not necessarily, arranged to at least partly follow an interface (not marked with a reference numeral) i.e. a connection surface between the grout 5 that is configured to cover the prefabricated construction element 1 in the joint 4 and the surfaces 6 of the prefabricated construction element 1.
The method allows easy removal of the prefabricated construction element 1 from grouting without damaging the prefabricated construction element 1, because the grout 5 will not adhere to the surfaces 6 of the prefabricated construction element 1 because of the separation means 7.
The coating step includes preferably, but not necessarily, additionally coating surfaces 6 of said another construction element 2 that is to be covered by grout 5 at least partly with separation means 7 such as with any alternative of the separation means 7 presented prior said grouting. In such case, the separation means 7 is preferably, but not necessarily, arranged to at least partly follow an interface (not marked with a reference numeral) i.e. a connection surface between the grout 5 that is configured to cover said another construction element 2 in the joint 4 and the surfaces 6 of said another construction element 2.
The method allows easy removal of the from the said another construction element 2 without damaging said another construction element 2, because the grout 5 will not adhere to the surfaces 6 of said another construction element 2 coated by separation means 7.
According to the invention, the connecting step includes, as illustrated in figures 1 to 7, providing repeatably openable and closable mechanical connection means 3 comprising anchor bolts 8 extending from said another construction element 2. The connection step includes screwing first nuts 9 on the anchor bolts 8 so that the nuts are at a distance from said another construction element 2, as illustrated in figures 1 to 3. The connection step includes arranging the anchor bolts 8 to penetrate openings 10 in the prefabricated construction element 1 so that the first nuts 9 are between said another construction element 2 and the prefabricated construction element 1 and a grouting space 11 is formed between said another construction element 2 and the prefabricated construction element 1. The connection step includes screwing second nuts 12 to the anchor bolts 8 to secure the prefabricated construction element 1 to the anchor bolts 8. The embodiments illustrated in figures 4 to 6, a washer 17 is arranged at the anchor bolts 8 between the openings 10 and second nuts 12. In such embodiments, the method includes preferably, but not necessarily, arranging in the connection step the anchor bolts 8 to penetrate openings 10 formed in metal plates 13 of connector elements 14 at least partly cast into the concrete of the prefabricated construction element 1. Such connector element 14 can for example be in the form of a column shoe, as illustrated in the embodiments shown in figures 1 to 3, a beam shoe, as illustrated in the embodiment illustrated in figure 7, or a wall shoe, as illustrated in the embodiments shown in figures 4 and 5, depending on the form of the prefabricated construction element 1. The connection step includes arranging the anchor bolts 8 to penetrate openings 10 in the prefabricated construction element 1 so that the anchor bolts 8 extend into a cavity 15 in the prefabricated construction element 1, and the connection step includes screwing said second nuts 12 to the anchor bolts 8 inside the cavities so that the second nuts 12 will be housed in the cavities. According to the invention, the method includes a filling step for filling the cavities at least partly with other material 16 than grout 5 prior said grouting step to at least partly prevent grout 5 from entering said cavities. At least one of mineral wool, gypsum, plaster and lime mortar is used as said other material 16 in the filling step. These materials are easier to remove than concrete or mortar so that the repeatably openable and closable mechanical connection means 3 can be accessed in the cavity 15 and be opened, as exemplified in figure 8.
To increase the shear force transfer capacity between grout 5 in the joint 4 between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, the method can include providing the prefabricated construction element 1 with at least one of a projection formation 20 configured to project into grout 5 in the joint between the prefabricated construction element 1 and said another construction element 2 and a cavity formation 21 into which grout 5 from the joint between the prefabricated construction element 1 and said another construction element 2 is configured to project.
To increase the shear force transfer capacity between grout 5 in the joint 4 between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, the method can include providing said another construction element 2 with at least one of a projection formation 20 configured to project into grout 5 in the joint between the prefabricated construction element 1 and said another construction element 2, and a cavity formation 21 into which grout 5 from the joint between the prefabricated construction element 1 and said another construction element 2 is configured to project.
To increase the shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, the construction element 1 can be provided with a formation 20 that extend into a cavity 21 in the grout 5 between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 2.
To increase the shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, construction element 1 can alternatively be provided with a formation 20 that extend into a cavity 21 in said another construction element 2, as illustrated in figure 3.
Alternatively can shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2 be increased, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, by forming a cavity 21 in the surface 6 of the prefabricated construction element 1 so that the cavity 21 is configured to be filled with the grout 5 cast between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 5.
Alternatively can shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2 be increased, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, by forming a cavity 21 both in the surface 6 of the prefabricated construction element 1 and in the surface 6 of said another construction element so that both cavities 21 are configured to be filled with the grout 5 cast between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 6.
The anchor bolts 8 are preferably, but not necessarily, threaded bars, which are screwed into threaded muffs 17, which are casted into concrete of said another construction element 2 so that the threaded muffs 17 extend from the surface 6 of said another construction element 2 into said another construction element 2, and which are anchored by means of anchoring means 18 fastened to said threaded muffs 17 and also casted into concrete of said another construction element 2. An example of such is Copra^® anchoring coupler by Peikko Group. An advantage of this that this allows to remove the threaded bar from the threaded muff 17 so that no anchor bolts 8 project from said another construction element 2 as illustrated in figures 11a to 11c. In figures 11b and 11c a separate tool 22 is screwed into the treaded muffs 17 to remove the treaded muffs 17 from the another construction element 2.
Next the connection arrangement between prefabricated construction element 1 comprising concrete and another construction element 2 will be described in greater detail.
The prefabricated construction element 1 comprising concrete can for example be any one of a prefabricated reinforced concrete column/pile/pillar, as illustrated in figures 1 to 3, a prefabricated reinforced concrete beam, as illustrated in figure 7, and a prefabricated concrete wall element, as illustrated in figures 4 to 6.
Said another construction element 2 can also be a prefabricated construction element 1 comprising concrete for example a prefabricated reinforced concrete column/pile/pillar, as illustrated in figure 7. Alternatively said another construction element 2 can be a cast-in-situ construction element comprising concrete such as a reinforced concrete foundation or a part belonging to a reinforced concrete foundation, as illustrated in figures 1 to 6.
In the connection arrangement, the prefabricated construction element 1 is connected by means of repeatably openable and closable mechanical connection means 3 to said another construction element 2 so that a joint 4 is formed between the prefabricated construction element 1 and said another construction element 2 and so that the joint 4 is at least partly limited by the prefabricated construction element 1 and said another construction element 2.
In the connection arrangement, the joint 4 is at least partly covered such as filled with grout 5 that is allowed to harden.
In the connection arrangement, separation means 7 such as anti-adhesion means 7 is present between surfaces 6 of the prefabricated construction element 1 that is at least partly covered by grout 5 and said grout 5 at least partly covering the joint 4 and that allowed to harden.
The separation means 7 can comprise mechanical anti-adhesion means such as perforated or unperforated plates, sheets or films. Mechanical anti-adhesion means can for example be an expanded steel sheet, a perforated steel sheet, a plate of polymer, a sheet of polymer, a film of polymer, a textile sheet, a fabric sheet, formwork liner, and wood such as coated plywood. An advantage that is achieved by using a perforated plate, sheet or a film as a separation means 7 is that the perforations allows for grout 5 to attach to the prefabricated construction element 1 through the separation means 7. This provides for a stronger connection between the grout 5 and the prefabricated construction element 1 while allowing for easy detaching of the prefabricated construction element 1 from the separation means 7 and from the grout 5.
The separation means 7 can comprise anti-adhesion substances such as fluid for example oil or carbon.
The separation means 7 is preferably, but not necessarily, a means separate from the prefabricated construction element 1, i.e. not a part of the prefabricated construction element, and a means separate from said another construction element 2, i.e. not a part of said another construction element 2.
The separation means 7 follows preferably, but not necessarily, at least partly an interface (not marked with a reference numeral) i.e. a connection surface between the grout 5 that covers the prefabricated construction element 1 in the joint 4 and the surfaces 6 of the prefabricated construction element 1.
The connection arrangement allows easy removal of the prefabricated construction element 1 from grouting without damaging the prefabricated construction element 1, because the grout 5 will not adhere to the surfaces 6 of the prefabricated construction element 1 coated by anti-adhesion substance 7.
In the connection arrangement, separation means 7 such as any alternative of the separation means 7 as presented is preferably also present between surfaces 6 of said another construction element 2 that is at least partly covered by grout 5 and said grout 5 at least partly covering the joint 4 and that is allowed to harden. An advantage of this is that this allows easy removal of the grouting from the other construction element, because the grout 5 will not adhere to the surfaces 6 of said another construction element 2 coated by anti-adhesion substance 7. In such case, the separation means 7 follows preferably, but not necessarily, at least partly an interface (not marked with a reference numeral) i.e. a connection surface between the grout 5 that covers said another construction element 2 in the joint 4 and the surfaces 6 of said another construction element 2.
According to the invention, the connection arrangement includes, as illustrated in figures 1 to 7, repeatably openable and closable mechanical connection means 3 comprising anchor bolts 8 extending from said another construction element 2. The repeatably openable and closable mechanical connection means 3 include first nuts 9 screwed on the anchor bolts 8 so that the nuts are at a distance from said another construction element 2, as illustrated in figures 1 to 3. The anchor bolts 8 can penetrate openings 10 in the prefabricated construction element 1 so that the first nuts 9 are between said another construction element 2 and the prefabricated construction element 1 and so that a grouting space 11 is formed between said another construction element 2 and the prefabricated construction element 1. The repeatably openable and closable mechanical connection means 3 include second nuts 12 screwed to the anchor bolts 8 to secure the prefabricated construction element 1 to the anchor bolts 8. The embodiments illustrated in figures 4 to 6, a washer 17 is arranged at the anchor bolts 8 between the openings 10 and second nuts 12. In such embodiments, the anchor bolts 8 can penetrate openings 10 formed in metal plates 13 of connector elements 14 at least partly cast into the concrete of the prefabricated construction element 1. Such connector element 14 can for example be in the form of a column shoe, as illustrated in the embodiments shown in figures 1 to 3, a beam shoe, as illustrated in the embodiment illustrated in figure 7, or a wall shoe, as illustrated in the embodiments shown in figures 4 and 5, depending on the form of the prefabricated construction element 1. The anchor bolts 8 penetrate in the connection arrangement openings 10 in the prefabricated construction element 1 so that the anchor bolts 8 extend into a cavity 15 in the prefabricated construction element 1, and said second nuts 12 are screwed to the anchor bolts 8 inside the cavities so that the second nuts 12 are housed in the cavities. The cavities are at least partly with other material 16 than grout 5 prior said grouting step to at least partly prevent grout 5 from entering said cavities. At least one of mineral wool, gypsum, plaster and lime mortar are used as said other material 16 in the filling step. These materials are easier to remove than concrete or mortar so that the repeatably openable and closable mechanical connection means 3 can be accessed in the cavity 15 and be opened, as exemplified in figure 8.
To increase the shear force transfer capacity between grout 5 in the joint 4 between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, the prefabricated construction element 1 can be provided with at least one of a projection formation 20 that projects into grout 5 in the joint between the prefabricated construction element 1 and said another construction element 2 and a cavity formation 21 into which grout 5 from the joint between the prefabricated construction element 1 and said another construction element 2 projects.
To increase the shear force transfer capacity between grout 5 in the joint 4 between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, said another construction element 2 can be provided with at least one of a projection formation 20 that projects into grout 5 in the joint between the prefabricated construction element 1 and said another construction element 2, and a cavity formation 21 into which grout 5 from the joint between the prefabricated construction element 1 and said another construction element 2 projects.
To increase the shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, the construction element 1 can be provided with a formation 20 that extend into a cavity 21 in the grout 5 between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 2.
To increase the shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, construction element 1 can alternatively be provided with a formation 20 that extend into a cavity 21 in said another construction element 2, as illustrated in figure 3.
Alternatively can shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2 be increased, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, by forming a cavity 21 in the surface 6 of the prefabricated construction element 1 so that the cavity 21 is configured to be filled with the grout 5 cast between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 5.
Alternatively can shear force transfer capacity between the prefabricated construction element 1 and said another construction element 2 be increased, while still creating an easily dismountable connection allowing reuse of a least the construction element 1, by forming a cavity 21 both in the surface 6 of the prefabricated construction element 1 and in the surface 6 of said another construction element so that both cavities 21 are configured to be filled with the grout 5 cast between the prefabricated construction element 1 and said another construction element 2, as illustrated in figure 6.
The anchor bolts 8 are preferably, but not necessarily, threaded bars, which are screwed into threaded muffs 17, which are casted into concrete of said another construction element 2 so that the threaded muffs 17 extend from the surface 6 of said another construction element 2 into said another construction element 2, and which are anchored by means of anchoring means 18 fastened to said threaded muffs 17 and also casted into concrete of said another construction element 2. An example of such is Copra^® anchoring coupler by Peikko Group. An advantage of this that this allows to remove the threaded bar from the threaded muff 17 so that no anchor bolts 8 project from said another construction element 2 as illustrated in figures 11a to 11c. In figures 11b and 11c a separate tool 22 is screwed into the treaded muffs 17 to remove the treaded muffs 17 from the another construction element 2.
It is apparent to a person skilled in the art that as technology advanced, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

Claims

A method for mounting a prefabricated construction element (1) comprising concrete to another construction element (2), wherein the method comprises
a connecting step for connecting the prefabricated construction element (1) by means of repeatably openable and closable mechanical connection means (3) to said another construction element (2) so that a joint (4) is formed between the prefabricated construction element (1) and said another construction element (2),

a grouting step for grouting the joint (4) by covering the joint (4) at least partly with grout (5) and allowing the grout (5) to harden, and

a coating step for coating surfaces (6) of the prefabricated construction element (1) that is to be covered by grout (5) in said grouting step at least partly with separation means (7) prior said grouting step,

wherein the connecting step includes providing repeatably openable and closable mechanical connection means (3) comprising anchor bolts (8) extending from said another construction element (2),

wherein the connection step includes screwing first nuts (9) on the anchor bolts (8) so that the nuts are at a distance from said another construction element (2),

wherein the connection step includes arranging the anchor bolts (8) to penetrate openings (10) in the prefabricated construction element (1) so that the first nuts (9) are between said another construction element (2) and the prefabricated construction element (1) and a grouting space (11) is formed between said another construction element (2) and the prefabricated construction element (1),

wherein the connection step includes screwing second nuts (12) to the anchor bolts (8) to secure the prefabricated construction element (1) to the anchor bolts (8).

wherein the connection step includes arranging the anchor bolts (8) to penetrate openings (10) in the prefabricated construction element (1) so that the anchor bolts (8) extend into a cavity (15) in the prefabricated construction element (1),

wherein the connection step includes screwing said second nuts (12) to the anchor bolts (8) inside the cavities so that the second nuts (12) will be housed in the cavities,

characterized

by a filling step for filling the cavities at least partly with other material (16) than grout (5) prior said grouting step to at least partly prevent grout (5) from entering said cavities, and

by using at least one of mineral wool, gypsum, plaster and lime mortar as said other material (16) in the filling step.
The method according to claim 1, characterized
by the separation means (7) is arranged to at least partly follow an interface between the grout (5) that is configured to cover the prefabricated construction element (1) in the joint (4) and the prefabricated construction element (1).
The method according to claim 1 or 2, characterized
by the coating step includes additionally coating surfaces (6) of said another construction element (2) that is to be covered by grout (5) at least partly with separation means (7) prior said grouting.
The method according to claim 3, characterized
by the separation means (7) is arranged to at least partly follow an interface between the grout (5) that is configured to cover said another construction element (2) in the joint (4) and said another construction element (2).
The method according to any of the claims 1 to 4, characterized
by providing as anchor bolts (8) threaded bars, which are screwed into threaded muffs (17), which are casted into concrete of said another construction element (2) so that the threaded muffs (17) extend from the surface (6) of said another construction element (2) into said another construction element (2), and which are anchored by means of anchoring means (18) fastened to said threaded muffs (17) and also casted into concrete of said another construction element (2).
The method according to any of the claims 1 to 5, characterized
by providing for the coating step a separation means (7) that is a means separate from the prefabricated construction element (1) and that is a means separate from said another construction element (2).
The method according to any of the claims 1 to 6, characterized
by providing the prefabricated construction element (1) with at least one of a projection formation (20) configured to project into grout (5) in the joint between the prefabricated construction element (1) and said another construction element (2) and a cavity formation (21) into which grout (5) from the joint between the prefabricated construction element (1) and said another construction element (2) is configured to project.
The method according to any of the claims 1 to 7, characterized
by providing said another construction element (2) with at least one of a projection formation (20) configured to project into grout (5) in the joint between the prefabricated construction element (1) and said another construction element (2), and a cavity formation (21) into which grout (5) from the joint between the prefabricated construction element (1) and said another construction element (2) is configured to project.
A connection arrangement between prefabricated construction element (1) comprising concrete and another construction element (2), wherein in the connection arrangement
the prefabricated construction element (1) is connected by means of repeatably openable and closable mechanical connection means (3) to said another construction element (2) so that a joint (4) is formed between the prefabricated construction element (1) and said another construction element (2), and

the joint (4) is at least partly covered with grout (5) that is allowed to harden,

by separation means (7) between surfaces (6) of the prefabricated construction element (1) that is at least partly covered by grout (5) and said grout (5) at least partly covering the joint (4) and that allowed to harden

by said repeatably openable and closable mechanical connection means (3) comprising anchor bolts (8) extending from said another construction element (2),

by first nuts (9) screwed on the anchor bolts (8) so that the nuts are at a distance from said another construction element (2),

by the anchor bolts (8) penetrating openings (10) in the prefabricated construction element (1) so that the first nuts (9) are between said another construction element (2) and the prefabricated construction element (1) and a grouting space (11) is formed between said another construction element (2) and the prefabricated construction element (1), and

by second nuts (12) screwed to the anchor bolts (8) to secure the prefabricated construction element (1) to the anchor bolts (8)

by the anchor bolts (8) penetrate the openings (10) in the prefabricated construction element (1) so that the anchor bolts (8) extend into a cavity (15) in the prefabricated construction element (1), and

by the said second nuts (12) being screwed to the anchor bolts (8) inside the cavities so that the second nuts (12) are housed in the cavities,

characterized

by the cavities being at least partly filled with other material (16) than grout (5) to at least partly prevent grout (5) from entering said cavities, and

by said other material (16) comprising at least one of mineral wool, gypsum, plaster and lime mortar.
The connection arrangement according to claim 9, characterized
by the separation means (7) follows at least partly an interface between the grout (5) that covers the prefabricated construction element (1) in the joint (4) and the prefabricated construction element (1).
The connection arrangement according to claim 9 or 10, characterized
by separation means (7) between surfaces (6) of said another construction element (2) that is at least partly covered by grout (5) and said grout (5) at least partly covering the joint (4) and that allowed to harden.
The connection arrangement according to any of the claims 9 to 11, characterized
by the separation means (7) follows at least partly an interface between the grout (5) that covers said another construction element (2) in the joint (4) and said another construction element (2).
The connection arrangement according to any of the claims 9 to 12, characterized
by the anchor bolts (8) are threaded bars, which are screwed into threaded muffs (17), which are casted into concrete of said another construction element (2) so that the threaded muffs (17) extend from the surface (6) of said another construction element (2) into said another construction element (2), and which are anchored by means of anchoring means (18) fastened to said threaded muffs (17) and also casted into concrete of said another construction element (2).
The connection arrangement according to any of the claims 9 to 13, characterized
by the separation means (7) is a means separate from the prefabricated construction element (1) and a means separate from said another construction element (2).
The connection arrangement according to any of the claims 9 to 14, characterized
by the prefabricated construction element (1) is provided with at least one of a projection formation (20) that projects into grout (5) in the joint between the prefabricated construction element (1) and said another construction element (2) and a cavity formation (21) into which grout (5) from the joint between the prefabricated construction element (1) and said another construction element (2) projects.
The connection arrangement according to any of the claims 9 to 15, characterized
by said another construction element (2) is provided with at least one of a projection formation (20) that projects into grout (5) in the joint between the prefabricated construction element (1) and said another construction element (2), and a cavity formation (21) into which grout (5) from the joint between the prefabricated construction element (1) and said another construction element (2) projects.