EP0360682B1 - Expansion joint for a concrete pavement - Google Patents

Expansion joint for a concrete pavement Download PDF

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Publication number
EP0360682B1
EP0360682B1 EP19890402557 EP89402557A EP0360682B1 EP 0360682 B1 EP0360682 B1 EP 0360682B1 EP 19890402557 EP19890402557 EP 19890402557 EP 89402557 A EP89402557 A EP 89402557A EP 0360682 B1 EP0360682 B1 EP 0360682B1
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EP
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Prior art keywords
joint
side walls
concrete
edge
walls
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EP19890402557
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German (de)
French (fr)
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EP0360682A1 (en
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Albert Toffolo
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • E04F15/14—Construction of joints, e.g. dividing strips

Definitions

  • the present invention relates to an expansion joint for concrete paving, and more particularly a joint formed by a hollow plastic section having an inverted T-shaped section.
  • FIG. 1 is a sectional view of a known joint of this type
  • the joint 10 comprises a lower part 12 forming a base from which protrudes vertically a part 14 forming a rule having side walls 14a, 14b converging towards one another in the direction of the upper edge 16 of the joint.
  • the lateral walls 14a, 14b have on the outer side longitudinal ribs 18a, 18b intended in particular to allow the attachment of concrete to these walls.
  • the resistance to vertical forces can be improved by providing, in the base 12, reinforcing spacers 12a, 12b situated in the extension of the side walls 14a, 14b, as shown in FIG. 3.
  • the seal 10 is no longer deformed vertically during the passage of the vibrating rule.
  • the upper edge of the joint is often smeared, or even covered with concrete after it has been leveled. It is then necessary to clear the upper edge of the joint otherwise, after the setting of the concrete, a crack forms on the surface which, even if it is located at the joint, does not necessarily follow the straight line defined by the edge of the joint and produces a completely unsightly effect.
  • the present invention aims to improve the joints of the prior art described above to obtain perfectly straight lines of joints and without corrugations of the concrete, without requiring any additional operation such as cleaning or clearing of joint edges after leveling the concrete.
  • the weakening zones are formed at a level equal to or greater than that of the outer ribs closest to the edge of the joint.
  • the weakened areas may be in the form of longitudinal notches formed on the inner side of the side walls of the joint.
  • the joint 20 illustrated in FIG. 4 consists of a hollow section having an inverted T section.
  • the seal 20 is formed in one piece by extrusion of a plastic material such as PVC.
  • the seal 20 comprises a substantially horizontal base 22 intended to be placed on a surface on which concrete paving is to be produced. From the median zone of the base 22 projects vertically a portion 24 forming a rule whose side walls are slightly inclined relative to the vertical while converging towards the edge 26 of the joint.
  • the side walls 24a, 24b have longitudinal ribs 28a, 28b. These ribs participate in the reinforcement of the walls 24a, 24b and also have the function of allowing the concrete to be hooked to the side walls of the joint 20 on either side of the latter.
  • the ribs 28a, 28b have an appropriate profile, for example in L or, as shown in Figure 4, in T or in dovetail.
  • the ribs formed on each wall are 3 in number regularly spaced. Of course, the number of ribs on each wall may be different from 3, while being at least equal to 2, and the spacing between the ribs may be irregular.
  • the resistance of the seal to crushing under the effect of forces exerted laterally on the walls 24a, 24b is reinforced by means of internal longitudinal spacers horizontally joining these walls. These spacers are for example two or three in number. In Figure 4, two spacers are shown, one 32a at the base of the part 24 and the other 32b substantially in the middle part thereof.
  • reinforcing spacers 22a, 22b are provided in the base 22, in the extension of the walls 24a, 24b, to increase the resistance of the seal to crushing under the effect of forces exerted vertically.
  • weakening zones here constituted by notches or longitudinal grooves 34a, 34b, are formed in the walls 24a, 24b at their upper part.
  • the notches 34a, 34b are two in number, one in each wall, are formed on the inner side of the walls, and are located at the ribs 28a, 28b closest to the edge 26.
  • the notches 34a, 34b have a depth at least equal to the thickness of the walls 24a, 24b.
  • the arrangement of these notches at the ribs 28a, 28b makes it possible to take advantage of the extra thickness of the walls 24a, 24b due to the presence of these ribs.
  • the ribs 28a, 28b closest to the edge 26 may have a shape different from that of the other ribs 28a, 28b.
  • the notches 34a, 34b allow a slight sagging of the edge 26 under the effect of a vertical force exerted thereon.
  • the deformation of the joint is limited to its upper part above the level of the notches, and does not affect the rest of the joint.
  • the elasticity of the material making up the joint allows it to return to its initial shape when the vertical force ceases to be exerted.
  • Figure 4 shows on an enlarged scale the detail of the profile of one (28a) of the two ribs 28a, 28b closest to the edge.
  • the outer wall 28a2 of this rib 28a is connected to the wall 24a, on the one hand, on the upper side, by an inclined part 28a1 a forming a chamfer and, on the other hand, on the lower side by a hooking part 28a3 to inverted L-profile.
  • the wall 28a2, which delimits the bottom of the notch 34a has a thickness less than that of the wall 24a, thus creating a critical point or weak point favoring the deformation of the seal at the level of the notch.
  • the upper part in the shape of a chamfer 28a1 prevents the joint, by resuming its original shape, from causing concrete.
  • FIG. 5 illustrates another embodiment of an expansion joint according to the invention.
  • the seal 40 shown in Figure 5 differs from that of Figure 4 essentially in the shape of the weakening zones.
  • the seal 40 has an inverted T section with a base 42 from which protrudes a portion 44 forming a rule and having side walls 44a, 44b provided with longitudinal ribs 48a, 48b intended in particular to allow the attachment of concrete.
  • Internal longitudinal struts 52a, 52b reinforce the resistance of the seal to crushing under the effect of forces exerted laterally, while internal spacers 42a, 42b, located in the extension of the walls 44a, 44b, reinforce the resistance to 'crushing under the effect of forces exerted vertically.
  • the weakening zones consist of longitudinal notches 54a, 54b formed in the side walls 44a, 44b, over the entire thickness of these, in the vicinity of the upper edge 46 of the joint.
  • the edges of each notch 54a, 54b are connected to each other by a part 56a, 56b with a C-shaped cross section.
  • each part 56a, 56b with a C section is preferably connected to the side wall of the joint so as to prevent the joint, returning to its original shape after vertical deformation, from driving concrete upwards.
  • the production of concrete paving using joints in accordance with the invention comprises the following steps.
  • Joints are arranged to form a grid on the support surface of the paving.
  • the joint bases are placed on fresh concrete studs so that the joint edges lie in the same horizontal plane corresponding to the upper surface of the paving to be produced.
  • the joints are easily cut with a saw to the desired lengths.
  • Two joints placed end to end can be joined by means of a concrete iron inserted in the upper part of each of them.
  • a joint is connected perpendicularly to another in place by sawing its end at an angle so that its base comes to abut against that in place and that the tops of the joints are at the same level.
  • the concrete is poured between the joints put in place then is compacted and leveled by means of a vibrating rule, or other similar device, resting on the upper edges of the joints and causing a slight sagging of these edges due to the presence of nicks.
  • the edges of the seals return to their initial position.
  • the formation of the notches in the vicinity of the edge of the joint, at the lowest level at the level of the outer ribs closest to the edge, means that the return of the edge to its initial position is not accompanied by an increase. concrete hanging on the side walls and, therefore, does not cause the concrete to form an undulation.
  • the raising of the edge after passage of the vibrating rule allows the clearance of the edge and the formation of a clean and straight line of joint.
  • the joints then remain permanently in the paving produced.
  • the deformation capacity of the side walls makes it possible to follow the movements of expansion and contraction of the adhering concrete to these walls thanks to the external ribs with which they are provided.

Description

La présente invention concerne un joint de dilatation pour dallage en béton, et plus particulièrement un joint constitué par un profilé creux en matière plastique ayant une section en forme de T renversé.The present invention relates to an expansion joint for concrete paving, and more particularly a joint formed by a hollow plastic section having an inverted T-shaped section.

Un tel joint de dilatation est connu et a été décrit dans le brevet FR 2 292 907 déposé le 27 novembre 1974. Comme le montre la figure 1, qui est une vue en coupe d'un joint connu de ce type, le joint 10 comprend une partie inférieure 12 formant embase d'où fait saillie verticalement une partie 14 formant règle ayant des parois latérales 14a, 14b convergeant l'une vers l'autre en direction de l'arête supérieure 16 du joint. Les parois latérales 14a, 14b présentent du côté extérieur des nervures longitudinales 18a, 18b destinées notamment à permettre l'accrochage du béton à ces parois.Such an expansion joint is known and has been described in patent FR 2 292 907 filed on November 27, 1974. As shown in FIG. 1, which is a sectional view of a known joint of this type, the joint 10 comprises a lower part 12 forming a base from which protrudes vertically a part 14 forming a rule having side walls 14a, 14b converging towards one another in the direction of the upper edge 16 of the joint. The lateral walls 14a, 14b have on the outer side longitudinal ribs 18a, 18b intended in particular to allow the attachment of concrete to these walls.

De la sorte, le joint 10 constitue à la fois :

  • un élément de coffrage perdu mis en place sur la surface de support du dallage, avant coulée du béton, et qui reste ensuite à demeure dans le dallage,
  • une règle pour la mise à niveau et le compactage du béton coulé, par exemple au moyen d'une règle vibrante prenant appui sur l'arête supérieure du joint, et
  • un joint de dilatation qui, grâce à la capacité de déformation de ses parois latérales, est apte à suivre les mouvements de dilatation et contraction du béton adhérant à ces parois.
In this way, the seal 10 constitutes both:
  • a lost formwork element placed on the support surface of the paving, before pouring the concrete, and which then remains permanently in the paving,
  • a rule for leveling and compacting the poured concrete, for example by means of a vibrating rule resting on the upper edge of the joint, and
  • an expansion joint which, thanks to the deformation capacity of its side walls, is able to follow the expansion and contraction movements of the concrete adhering to these walls.

Avec le joint 10 de l'art antérieur décrit ci-avant, le passage de la règle vibrante, ou d'un appareil analogue, sur l'arête du joint, lors du compactage et de la mise à niveau du béton, provoque un affaissement du joint en raison de sa déformabilité. Lorsque le joint retrouve ensuite sa forme initiale par son élasticité, il entraîne le béton accroché aux parois latérales 14a, 14b, comme le montre schématiquement la figure 2. Il en résulte la formation d'une ondulation du béton le long du joint.With the joint 10 of the prior art described above, the passage of the vibrating rule, or of a similar device, over the edge of the joint, during compaction and leveling of the concrete, causes sagging of the joint due to its deformability. When the joint then regains its initial shape by its elasticity, it drives the concrete attached to the side walls 14a, 14b, as shown diagrammatically in FIG. 2. This results in the formation of an undulation of the concrete along the joint.

Pour éviter cet inconvénient, la résistance aux efforts verticaux peut être améliorée en prévoyant, dans l'embase 12, des entretoises de renfort 12a, 12b situées dans le prolongement des parois latérales 14a, 14b, comme le montre la figure 3. Le joint 10 n'est plus déformé verticalement lors du passage de la règle vibrante. Toutefois, il s'avère que l'arête supérieure du joint est souvent maculée, voir recouverte de béton après la mise à niveau de celui-ci. Il est alors nécessaire de dégager l'arête supérieure du joint faute de quoi, après la prise du béton, il se forme en surface une fissure qui, même si elle est située au niveau du joint, ne suit pas nécessairement la ligne droite définie par l'arête du joint et produit un effet tout à fait inesthétique.To avoid this drawback, the resistance to vertical forces can be improved by providing, in the base 12, reinforcing spacers 12a, 12b situated in the extension of the side walls 14a, 14b, as shown in FIG. 3. The seal 10 is no longer deformed vertically during the passage of the vibrating rule. However, it turns out that the upper edge of the joint is often smeared, or even covered with concrete after it has been leveled. It is then necessary to clear the upper edge of the joint otherwise, after the setting of the concrete, a crack forms on the surface which, even if it is located at the joint, does not necessarily follow the straight line defined by the edge of the joint and produces a completely unsightly effect.

Aussi, la présente invention a-t-elle pour but de perfectionner les joints de l'art antérieur décrits ci-avant pour obtenir des lignes de joints parfaitement rectilignes et sans ondulations du béton, sans nécessiter d'opération supplémentaire telle que le nettoyage ou dégagement des arêtes des joints après mise à niveau du béton.Also, the present invention aims to improve the joints of the prior art described above to obtain perfectly straight lines of joints and without corrugations of the concrete, without requiring any additional operation such as cleaning or clearing of joint edges after leveling the concrete.

Ce but est atteint au moyen d'un joint de dilatation du type décrit plus haut et dans lequel, conformément à l'invention, les parois latérales présentent, à leur partie supérieure, des zones d'affaiblissement longitudinales propres à conférer au joint une capacité de déformation verticale élastique à sa partie supérieure.This object is achieved by means of an expansion joint of the type described above and in which, in accordance with the invention, the side walls have, at their upper part, longitudinal weakening zones capable of giving the joint a capacity of elastic vertical deformation at its upper part.

Les zones d'affaiblissement sont formées à un niveau égal ou supérieur à celui des nervures extérieures les plus proches de l'arête du joint.The weakening zones are formed at a level equal to or greater than that of the outer ribs closest to the edge of the joint.

Ainsi, lors du passage de la règle vibrante sur l'arête, une déformation verticale du joint est autorisée de façon limitée, dans la partie supérieure de celui-ci. Le retour du joint à sa forme initiale ne s'accompagne pas d'un entraînement du béton accroché aux nervures extérieures des parois latérales puisque la déformation verticale du joint n'affecte pas la partie de celui-ci portant ces nervures. De plus, le retour du joint à sa forme initiale se traduit par un léger relèvement de l'arête après le pas sage de la règle vibrante, ce qui permet un dégagement automatique de cette arête et la formation d'un joint propre et parfaitement rectiligne.Thus, during the passage of the vibrating rule on the edge, a vertical deformation of the seal is authorized in a limited way, in the upper part of it. The return of the joint to its initial shape is not accompanied by a entrainment of the concrete attached to the outer ribs of the side walls since the vertical deformation of the joint does not affect the part of the latter carrying these ribs. In addition, the return of the joint to its initial shape results in a slight raising of the edge after the pitch wise of the vibrating rule, which allows an automatic release of this edge and the formation of a clean and perfectly straight seal.

Les zones d'affaiblissement peuvent avoir la forme d'entailles longitudinales formées du côté intérieur des parois latérales du joint.The weakened areas may be in the form of longitudinal notches formed on the inner side of the side walls of the joint.

L'invention sera mieux comprise à la lecture de la description faite ci-après, à titre indicatif mais non limitatif, en référence aux dessins annexés, sur lesquels :

  • les figures 1, 2, 3, déjà décrites, illustrent des joints de dilatation de l'art antérieur,
  • la figure 4 est une vue en coupe transversale d'un mode de réalisation d'un joint conforme à l'invention, et
  • la figure 5 est une vue en coupe transversale d'un autre mode de réalisation d'un joint conforme à l'invention.
The invention will be better understood on reading the description given below, by way of indication but not limitation, with reference to the appended drawings, in which:
  • FIGS. 1, 2, 3, already described, illustrate expansion joints of the prior art,
  • FIG. 4 is a cross-sectional view of an embodiment of a seal according to the invention, and
  • Figure 5 is a cross-sectional view of another embodiment of a seal according to the invention.

De la même façon que le joint 10 de la figure 3, le joint 20 illustré par la figure 4 est constitué par un profilé creux ayant une section en T renversé. Le joint 20 est formé en une seule pièce par extrusion d'une matière plastique telle que du PVC.In the same way as the joint 10 in FIG. 3, the joint 20 illustrated in FIG. 4 consists of a hollow section having an inverted T section. The seal 20 is formed in one piece by extrusion of a plastic material such as PVC.

Le joint 20 comprend une embase 22 sensiblement horizontale destinée à être posée sur une surface sur laquelle un dallage en béton doit être réalisé. De la zone médiane de l'embase 22 fait saillie verticalement une partie 24 formant règle dont les parois latérales sont légèrement inclinées par rapport à la verticale en convergeant vers l'arête 26 du joint.The seal 20 comprises a substantially horizontal base 22 intended to be placed on a surface on which concrete paving is to be produced. From the median zone of the base 22 projects vertically a portion 24 forming a rule whose side walls are slightly inclined relative to the vertical while converging towards the edge 26 of the joint.

Du côté extérieur, les parois latérales 24a, 24b présentent des nervures longitudinales 28a, 28b. Ces nervures participent au renforcement des parois 24a, 24b et ont également pour fonction de permettre un accrochage du béton aux parois latérales du joint 20 de part et d'autre de celui-ci. A cet effet, les nervures 28a, 28b présentent un profil approprié, par exemple en L ou, comme montré sur la figure 4, en T ou en queue d'aronde. Dans l'exemple illustré, les nervures formées sur chaque paroi sont au nombre de 3 régulièrement espacées. Bien entendu, le nombre des nervures sur chaque paroi pourra être différent de 3, tout en étant au moins égal à 2, et l'espacement entre les nervures pourra être non régulier.On the outside, the side walls 24a, 24b have longitudinal ribs 28a, 28b. These ribs participate in the reinforcement of the walls 24a, 24b and also have the function of allowing the concrete to be hooked to the side walls of the joint 20 on either side of the latter. For this purpose, the ribs 28a, 28b have an appropriate profile, for example in L or, as shown in Figure 4, in T or in dovetail. In the example illustrated, the ribs formed on each wall are 3 in number regularly spaced. Of course, the number of ribs on each wall may be different from 3, while being at least equal to 2, and the spacing between the ribs may be irregular.

La résistance du joint à l'écrasement sous l'effet d'efforts exercés latéralement sur les parois 24a, 24b est renforcée au moyen d'entretoises longitudinales internes joignant horizontalement ces parois. Ces entretoises sont par exemple au nombre de deux ou trois. Sur la figure 4, deux entretoises sont montrées, l'une 32a à la base de la partie 24 et l'autre 32b sensiblement dans la partie médiane de celle-ci.The resistance of the seal to crushing under the effect of forces exerted laterally on the walls 24a, 24b is reinforced by means of internal longitudinal spacers horizontally joining these walls. These spacers are for example two or three in number. In Figure 4, two spacers are shown, one 32a at the base of the part 24 and the other 32b substantially in the middle part thereof.

D'autres entretoises de renforcement 22a, 22b sont prévues dans l'embase 22, dans le prolongement des parois 24a, 24b, pour accroître la résistance du joint à l'écrasement sous l'effet d'efforts exercés verticalement.Other reinforcing spacers 22a, 22b are provided in the base 22, in the extension of the walls 24a, 24b, to increase the resistance of the seal to crushing under the effect of forces exerted vertically.

Conformément à l'invention, des zones d'affaiblissement, ici constituées par des entailles ou rainures longitudinales 34a, 34b, sont formées dans les parois 24a, 24b à leur partie supérieure. Les entailles 34a, 34b sont au nombre de deux, une dans chaque paroi, sont formées du côté intérieur des parois, et sont situées au niveau des nervures 28a, 28b les plus proches de l'arête 26. Les entailles 34a, 34b ont une profondeur au moins égale à l'épaisseur des parois 24a, 24b. La disposition de ces entailles au niveau de nervures 28a, 28b permet de tirer profit de la surépaisseur des parois 24a, 24b due à la présence de ces nervures. Notamment en vue de réserver la place nécessaire aux entailles, les nervures 28a, 28b les plus proches de l'arête 26 peuvent avoir une forme différente de celle des autres nervures 28a, 28b.According to the invention, weakening zones, here constituted by notches or longitudinal grooves 34a, 34b, are formed in the walls 24a, 24b at their upper part. The notches 34a, 34b are two in number, one in each wall, are formed on the inner side of the walls, and are located at the ribs 28a, 28b closest to the edge 26. The notches 34a, 34b have a depth at least equal to the thickness of the walls 24a, 24b. The arrangement of these notches at the ribs 28a, 28b makes it possible to take advantage of the extra thickness of the walls 24a, 24b due to the presence of these ribs. In particular in order to reserve the space necessary for the notches, the ribs 28a, 28b closest to the edge 26 may have a shape different from that of the other ribs 28a, 28b.

Les entailles 34a, 34b permettent un léger affaissement de l'arête 26 sous l'effet d'un effort vertical s'exerçant sur celle-ci. La déformation du joint est limitée à sa partie supérieure au-dessus du niveau des entailles, et n'affecte pas le reste du joint. L'élasticité du matériau constitutif du joint permet un retour de celui-ci à sa forme initiale lorsque l'effort vertical cesse d'être exercé.The notches 34a, 34b allow a slight sagging of the edge 26 under the effect of a vertical force exerted thereon. The deformation of the joint is limited to its upper part above the level of the notches, and does not affect the rest of the joint. The elasticity of the material making up the joint allows it to return to its initial shape when the vertical force ceases to be exerted.

La figure 4 montre à échelle agrandie le détail du profil de l'une (28a) des deux nervures 28a, 28b les plus proches de l'arête. La paroi extérieure 28a₂ de cette nervure 28a se raccorde à la paroi 24a, d'une part, du côté supérieur, par une partie inclinée 28a₁ a formant chanfrein et, d'autre part, du côté inférieur par une partie d'accrochage 28a₃ à profil en L renversé. La paroi 28a₂, qui délimite le fond de l'entaille 34a, a une épaisseur inférieure à celle de la paroi 24a, créant ainsi un point critique ou point faible favorisant la déformation du joint au niveau de l'entaille. La partie supérieure en forme de chanfrein 28a₁ empêche que le joint, en reprenant sa forme d'origine, entraîne du béton.Figure 4 shows on an enlarged scale the detail of the profile of one (28a) of the two ribs 28a, 28b closest to the edge. The outer wall 28a₂ of this rib 28a is connected to the wall 24a, on the one hand, on the upper side, by an inclined part 28a₁ a forming a chamfer and, on the other hand, on the lower side by a hooking part 28a₃ to inverted L-profile. The wall 28a₂, which delimits the bottom of the notch 34a, has a thickness less than that of the wall 24a, thus creating a critical point or weak point favoring the deformation of the seal at the level of the notch. The upper part in the shape of a chamfer 28a₁ prevents the joint, by resuming its original shape, from causing concrete.

La figure 5 illustre un autre mode de réalisation d'un joint de dilatation conforme à l'invention.FIG. 5 illustrates another embodiment of an expansion joint according to the invention.

Le joint 40 montré à la figure 5 diffère de celui de la figure 4 essentiellement dans la forme des zones d'affaiblissement.The seal 40 shown in Figure 5 differs from that of Figure 4 essentially in the shape of the weakening zones.

En effet, le joint 40 a une section en T renversé avec une embase 42 de laquelle fait saillie une partie 44 formant règle et ayant des parois latérales 44a, 44b munies de nervures longitudinales 48a, 48b destinées notamment à permettre l'accrochage du béton. Des entretoises longitudinales internes 52a, 52b renforcent la résistance du joint à l'écrasement sous l'effet d'efforts exercés latéralement, tandis que des entretoises internes 42a, 42b, situées dans le prolongement des parois 44a, 44b, renforcent la résistance à l'écrasement sous l'effet d'efforts exercés verticalement.Indeed, the seal 40 has an inverted T section with a base 42 from which protrudes a portion 44 forming a rule and having side walls 44a, 44b provided with longitudinal ribs 48a, 48b intended in particular to allow the attachment of concrete. Internal longitudinal struts 52a, 52b reinforce the resistance of the seal to crushing under the effect of forces exerted laterally, while internal spacers 42a, 42b, located in the extension of the walls 44a, 44b, reinforce the resistance to 'crushing under the effect of forces exerted vertically.

Les zones d'affaiblissement consistent en des entailles longitudinales 54a, 54b formées dans les parois latérales 44a, 44b, sur toute l'épaisseur de celles-ci, au voisinage de l'arête supérieure 46 du joint. Du côté extérieur du joint, les bords de chaque entaille 54a, 54b sont reliés l'un à l'autre par une partie 56a, 56b à section transversale en forme de C.The weakening zones consist of longitudinal notches 54a, 54b formed in the side walls 44a, 44b, over the entire thickness of these, in the vicinity of the upper edge 46 of the joint. On the outside of the joint, the edges of each notch 54a, 54b are connected to each other by a part 56a, 56b with a C-shaped cross section.

Sous l'effet d'un effort vertical s'exerçant sur l'arête 46, les bords de chaque entaille se rapprochent l'un de l'autre, jusqu'à venir éventuellement en contact mutuel, en raison de la capacité de déformation élastique des parties 56a, 56b. Du côté supérieur, chaque partie 56a, 56b à section en C est de préférence raccordée à la paroi latérale du joint de façon à éviter que le joint, en reprenant sa forme d'origine après déformation verticale, n'entraîne du béton vers le haut.Under the effect of a vertical force exerted on the edge 46, the edges of each notch approach each other, until possibly coming into mutual contact, due to the capacity of elastic deformation parts 56a, 56b. On the upper side, each part 56a, 56b with a C section is preferably connected to the side wall of the joint so as to prevent the joint, returning to its original shape after vertical deformation, from driving concrete upwards.

La réalisation d'un dallage en béton au moyen de joints conformes à l'invention comprend les étapes suivantes.The production of concrete paving using joints in accordance with the invention comprises the following steps.

Des joints sont disposés pour former un quadrillage sur la surface support du dallage. Les embases des joints sont posées sur des plots en béton frais de manière que les arêtes des joints se situent dans un même plan horizontal correspondant à la surface supérieure du dallage à réaliser. Les joints sont découpés aisément à la scie aux longueurs voulues. Deux joints placés bout à bout peuvent être réunis au moyen d'un fer à béton introduit dans la partie supérieure de chacun d'entre eux. Un joint est raccordé perpendiculairement à un autre en place en sciant son extrémité en biais afin que son embase vienne buter contre celle en place et que les sommets des joints soient au même niveau.Joints are arranged to form a grid on the support surface of the paving. The joint bases are placed on fresh concrete studs so that the joint edges lie in the same horizontal plane corresponding to the upper surface of the paving to be produced. The joints are easily cut with a saw to the desired lengths. Two joints placed end to end can be joined by means of a concrete iron inserted in the upper part of each of them. A joint is connected perpendicularly to another in place by sawing its end at an angle so that its base comes to abut against that in place and that the tops of the joints are at the same level.

Le béton est coulé entre les joints mis en place puis est compacté et mis à niveau au moyen d'une règle vibrante, ou autre appareil analogue, prenant appui sur les arêtes supérieures des joints et provoquant un léger affaissement de ces arêtes en raison de la présence des entailles.The concrete is poured between the joints put in place then is compacted and leveled by means of a vibrating rule, or other similar device, resting on the upper edges of the joints and causing a slight sagging of these edges due to the presence of nicks.

Après passage de la règle vibrante, les arêtes des joints retrouvent leur position initiale. La formation des entailles au voisinage de l'arête du joint, au plus bas au niveau des nervures extérieures les plus proches de l'arête, fait que le retour de l'arête à sa position initiale ne s'accompagne pas d'un relèvement du béton accroché aux parois latérales et, par conséquent, ne provoque pas la formation d'une ondulation du béton. Par ailleurs, le relèvement de l'arête après passage de la règle vibrante permet le dégagement de l'arête et la formation d'une ligne de joint nette et rectiligne.After the vibrating rule has passed, the edges of the seals return to their initial position. The formation of the notches in the vicinity of the edge of the joint, at the lowest level at the level of the outer ribs closest to the edge, means that the return of the edge to its initial position is not accompanied by an increase. concrete hanging on the side walls and, therefore, does not cause the concrete to form an undulation. Furthermore, the raising of the edge after passage of the vibrating rule allows the clearance of the edge and the formation of a clean and straight line of joint.

Les joints restent ensuite à demeure dans le dallage réalisé. La capacité de déformation des parois latérales permet de suivre les mouvements de dilatation et contraction du béton adhérant à ces parois grâce aux nervures extérieures dont elles sont munies.The joints then remain permanently in the paving produced. The deformation capacity of the side walls makes it possible to follow the movements of expansion and contraction of the adhering concrete to these walls thanks to the external ribs with which they are provided.

On notera enfin que l'intérieur des joints peut être utilisé pour le passage de câbles à l'intérieur du dallage.Finally, note that the interior of the joints can be used for the passage of cables inside the paving.

Claims (6)

1. Expansion joint for a concrete pavement constituted by a hollow section piece in plastic material of cross-section shaped as a turned over T, with a lower part (22;42) forming base from which a part (24;44), forming the blade of the T-section, projects vertically, said blade having side walls (24a,24b;44a,44b) converging together towards the upper edge (26;46) of the joint (20;40), said side walls having on the outside longitudinal ribs (28a,28b;48a,48b) notably designed to allow the concrete to adhere to said walls, so that the joint can constitute, a lost molding element for casting the concrete, a levelling rod for the cast concrete, as well as an expansion joint capable, by its deformability, to adapt to the expansions and contractions of the concrete adhering to the side walls,
characterized in that the side walls (24a,24b;44a,44b) of the joint have, at their upper part, longitudinal weakening areas (34a,34b; 54a,54b) provided to confer to the joint a power of elastic vertical deformation at its upper part.
2. Joint according to claim 1, characterized in that the weakening areas (34a,34b;54a,54b) are formed at a level which is equal to or higher than that of the outer ribs (28a,28b;48a,48b) closest to the edge (26) of the joint.
3. Joint according to any one of claims 1 or 2, characterized in that bracing members (22a,22b;42a,42b) are fitted in the base (22,42) in extension of the side walls (24a,24b;44a,44b) of the joint.
4. Joint according to any one of claims 1 to 3, characterized in that the weakening areas consist in notches (34a,34b) formed on the inside of the side walls (24a,24b), at the level of the outer ribs closest to the edge of the joint.
5. Joint according to claim 4, characterized in that the outer ribs closest to the edge of the joint are connected with the side walls (24a,24b) of the joint, on the upper side, via inclined positions (28a₁) forming chamfer.
6. Joint according to any one of claims 1 to 3, characterized in that the weakening areas are notches (54a,54b) formed in the side walls (44a,44b) of the joint, the edges of each notch being interconnected, on the outside of the side walls, by a part (56a,56b) which is elastically deformable in vertical direction.
EP19890402557 1988-09-19 1989-09-19 Expansion joint for a concrete pavement Expired - Lifetime EP0360682B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812214A FR2636651B1 (en) 1988-09-19 1988-09-19 EXPANSION JOINT FOR CONCRETE FLOORING
FR8812214 1988-09-19

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EP0360682A1 EP0360682A1 (en) 1990-03-28
EP0360682B1 true EP0360682B1 (en) 1992-05-06

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Application Number Title Priority Date Filing Date
EP19890402557 Expired - Lifetime EP0360682B1 (en) 1988-09-19 1989-09-19 Expansion joint for a concrete pavement

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EP (1) EP0360682B1 (en)
DE (1) DE68901437D1 (en)
FR (1) FR2636651B1 (en)

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Publication number Priority date Publication date Assignee Title
US5992113A (en) * 1995-09-29 1999-11-30 John B. Szynal Compressible foam weather stripping
EP1266106A2 (en) * 2000-03-20 2002-12-18 Josef Klemens Sealing and insulating system having a sealing and insulating profile
GB0218386D0 (en) * 2002-08-08 2002-09-18 Kelly David C J Shuttering
GB0427175D0 (en) * 2004-12-13 2005-01-12 Impey Uk Ltd Floor drainage
EP2365150B3 (en) 2010-03-03 2020-09-16 KFIP Limited Lost Shuttering
EP2894255B1 (en) * 2013-12-02 2017-02-01 Omniplast Adjustable universal joint clip system for screed guide and method of installation of the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482646A1 (en) * 1980-05-14 1981-11-20 Louis Pierre PROFILE FORMING LOST RULE FOR THE CONSTRUCTION OF FLOOR COVERINGS ON SITE
FR2518147A1 (en) * 1981-12-14 1983-06-17 Toffolo Albert Support for concrete slab joint elements - comprises moulded plastics block which can hold joint elements at different relative heights

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Publication number Publication date
FR2636651B1 (en) 1990-12-28
DE68901437D1 (en) 1992-06-11
EP0360682A1 (en) 1990-03-28
FR2636651A1 (en) 1990-03-23

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