EP0119663A2 - Process for making a settlement-opposing joint - Google Patents

Process for making a settlement-opposing joint Download PDF

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Publication number
EP0119663A2
EP0119663A2 EP84200382A EP84200382A EP0119663A2 EP 0119663 A2 EP0119663 A2 EP 0119663A2 EP 84200382 A EP84200382 A EP 84200382A EP 84200382 A EP84200382 A EP 84200382A EP 0119663 A2 EP0119663 A2 EP 0119663A2
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EP
European Patent Office
Prior art keywords
slab
concrete
loop
bar
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84200382A
Other languages
German (de)
French (fr)
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EP0119663A3 (en
Inventor
Mario Ravone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from BE6/47799A external-priority patent/BE896244A/en
Application filed by Individual filed Critical Individual
Publication of EP0119663A2 publication Critical patent/EP0119663A2/en
Publication of EP0119663A3 publication Critical patent/EP0119663A3/en
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints

Definitions

  • the present invention relates to the laying of concrete slabs and aims to remedy the various problems of stability, settlement and shrinkage experienced by the concrete slabs after their installation, these different problems always being found in the same places, namely at shrinkage joints and construction joints.
  • the construction joint covering the entire thickness of the slab - from 12 cm to 30 cm - is currently essential to allow the concrete to expand over the full span of the slab.
  • a construction joint is essential for any slab of a length equal to or greater than 60 m, it has the effect of allowing the total withdrawal of the concrete on the span without creating cracks.
  • the disadvantage of such a joint is that, the slab being made up of two independent parts from each other, separated by the joint with a width of more or less 1 cm, the vertical settlement is not not necessarily the same for both parties. This results in level differences, which can go up to 3 cm, and the lips of the seals then deteriorate in the passage of handling equipment and vehicles.
  • the removal joint squares the slab in portions of 25 m 2 to 40 m 2 ; it has a depth equal to 25% of the thickness of said slab. Its effect is to better control shrinkage while avoiding cracks as much as possible.
  • the invention also aims to improve the results already obtained in this field and relates to a method of producing a non-settling joint characterized in that it consists in placing on spacers a concrete bar provided in its part center of a loop directed downwards, to force said loop by a waiting bar welded horizontally on the concrete bar above the loop, to pour the slab and to saw the slab by cutting the bar wait, so that the loop takes position 0 and the concrete expands at the joint.
  • the loop is treated anti-rust and sheathed with insulation.
  • an anti-settlement joint firstly consists in placing spacers 1 at a determined distance, one of the other of the concrete bars 2 provided in their central part with a loop 3 directed downwards.
  • This concrete bar advantageously comes with a diameter of 8 mm and a total length of 90 cm.
  • this diameter and this length, as well as the importance of the loop 3, are to be determined according to the load or the thickness of the slab.
  • This loop 3 is treated anti-rust and is sheathed with insulation 4 to be determined also depending on the load or the thickness of the slab, it could be about 30 mm thick.
  • This loop is then forced, that is to say stretched inward, by means of a waiting bar 5 of 3 mm to 4 mm in diameter, welded horizontally above the loop 3, and the slab 6 is poured.
  • This welded waiting bar 5 is then cut at the time of sawing the slab, this sawing 7 allowing the loop 3 to take the zero position and causing the expansion of the concrete of the slab at the location of the joint.
  • a compression seal according to the invention has the advantage of being able to absorb loads or shocks thanks to the flexibility of the concrete bar 2 and the insulation 4 of the loop 3, which has the effect of avoiding cracks and differential settlements.

Abstract

The process consists in laying over spacers (1) a concrete bar (2) provided at its centre with a downward bend (3), in stressing said bend (3) with a temporary bar (5) welded horizontally to the concrete bar (2) above the bend (3), in casting the slab (6) and in cutting through the slab (6) and the temporary bar (5), so that the bend (3) assumes the zero position and the concrete dilates at the joint. <IMAGE>

Description

La présente invention concerne la pose de dalles en béton et a pour but de remédier aux différents problèmes de stabilité, de tassement et de retrait que subissent les dalles en béton après leur pose, ces différents problèmes se retrouvant toujours aux mêmes endroits, à savoir aux joints de retrait et aux joints de construction.The present invention relates to the laying of concrete slabs and aims to remedy the various problems of stability, settlement and shrinkage experienced by the concrete slabs after their installation, these different problems always being found in the same places, namely at shrinkage joints and construction joints.

Le joint de construction portant sur tout l'épaisseur de la dalle - de 12 cm à 30 cm - est actuellement indispensable pour permettre la dilatation du béton sur la portée totale de la dalle. Ainsi, un joint de construction est indispensable pour toute dalle d'une longueur égale ou supérieure à 60 m, il a pour effet de permettre le retrait total du béton sur la portée sans créer de fissures. L'inconvénient d'un tel joint consiste en ce que, la dalle étant constituée de deux parties indépendantes l'une de l'autre, séparées par le joint d'une largeur de plus ou moins 1 cm, le tassement vertical n'est pas nécessairement le même pour les deux parties. Il en résulte des différences de niveau, qui peuvent aller jusqu'à 3 cm, et les lèvres des joints se détériorent alors au passage des engins de manutention et des véhicules.The construction joint covering the entire thickness of the slab - from 12 cm to 30 cm - is currently essential to allow the concrete to expand over the full span of the slab. Thus, a construction joint is essential for any slab of a length equal to or greater than 60 m, it has the effect of allowing the total withdrawal of the concrete on the span without creating cracks. The disadvantage of such a joint is that, the slab being made up of two independent parts from each other, separated by the joint with a width of more or less 1 cm, the vertical settlement is not not necessarily the same for both parties. This results in level differences, which can go up to 3 cm, and the lips of the seals then deteriorate in the passage of handling equipment and vehicles.

Le joint de retrait quadrille la dalle en portions de 25 m2 à 40 m2 ; il a une profondeur égale à 25 % de l'épaisseur de ladite dalle. Son effet est de mieux contrôler le retrait tout en évitant au maximum les fissures.The removal joint squares the slab in portions of 25 m 2 to 40 m 2 ; it has a depth equal to 25% of the thickness of said slab. Its effect is to better control shrinkage while avoiding cracks as much as possible.

On connaît actuellement des systèmes, qui tendent à éviter les inconvénients habituels, il s'agit du joint goujonné et du joint par plaque de transfert de charge, mais ils présentent aussi des inconvénients même s'ils ont obtenu certains résultats.Currently known systems, which tend to avoid the usual drawbacks, it is the dowel joint and the joint by load transfer plate, but they also have drawbacks even if they have obtained certain results.

L'invention a encore pour but d'améliorer les résultats déjà obtenus dans ce domaine et est relative à un procédé de réalisation d'un joint antitassement caractérisé en ce qu'il consiste à poser sur des écarteurs une barre à béton pourvue en sa partie centrale d'une boucle dirigée vers le bas, à mettre en force ladite boucle par une barre d'attente soudée horizontalement sur la barre à béton au-dessus de la boucle, à couler la dalle et à scier la dalle en coupant la barre d'attente, de telle manière que la boucle prend la position 0 et le béton se dilate à l'endroit du joint.The invention also aims to improve the results already obtained in this field and relates to a method of producing a non-settling joint characterized in that it consists in placing on spacers a concrete bar provided in its part center of a loop directed downwards, to force said loop by a waiting bar welded horizontally on the concrete bar above the loop, to pour the slab and to saw the slab by cutting the bar wait, so that the loop takes position 0 and the concrete expands at the joint.

Suivant l'invention la boucle est traitée antirouille et gainée d'une isolation.According to the invention, the loop is treated anti-rust and sheathed with insulation.

Pour mieux faire comprendre l'invention celle-ci est décrite maintenant sur la base du dessin schématique annexé montrant une vue en coupe d'une dalle à l'endroit du joint antitassement suivant l'invention.To better understand the invention, this is now described on the basis of the appended schematic drawing showing a sectional view of a slab at the location of the anti-settlement joint according to the invention.

Comme on le voit au dessin la réalisation d'un joint antitassement suivant l'invention consiste d'abord à disposer sur des écarteurs 1 à une distance déterminée l'une de l'autre des barres à béton 2 pourvues en leur partie centrale d'une boucle 3 dirigée vers le bas. Cette barre à béton se présente avantageusement avec un diamètre de 8 mm et une longueur totale de 90 cm. Bien entendu, ce diamètre et cette longueur, ainsi que l'importance de la boucle 3, sont à déterminer suivant la charge ou l'épaisseur de la dalle.As can be seen in the drawing, the production of an anti-settlement joint according to the invention firstly consists in placing spacers 1 at a determined distance, one of the other of the concrete bars 2 provided in their central part with a loop 3 directed downwards. This concrete bar advantageously comes with a diameter of 8 mm and a total length of 90 cm. Of course, this diameter and this length, as well as the importance of the loop 3, are to be determined according to the load or the thickness of the slab.

Cette boucle 3 est traitée antirouille et est gainée d'une isolation 4 à déterminer également selon la charge ou l'épaisseur de la dalle, elle pourrait avoir environ 30 mm d'épaisseur.This loop 3 is treated anti-rust and is sheathed with insulation 4 to be determined also depending on the load or the thickness of the slab, it could be about 30 mm thick.

Cette boucle est alors mise en force, c'est-à-dire tendue vers l'intérieur, au moyen d'une barre d'attente 5 de 3 mm à 4 mm de diamètre, soudée horizontalement au-dessus de la boucle 3, et la dalle 6 est coulée.This loop is then forced, that is to say stretched inward, by means of a waiting bar 5 of 3 mm to 4 mm in diameter, welded horizontally above the loop 3, and the slab 6 is poured.

Cette barre d'attente soudée 5 est ensuite coupée au moment du sciage de la dalle, ce sciage 7 permettant à la boucle 3 de prendre la position zéro et provoquant la dilatation du béton de la dalle à l'endroit du joint.This welded waiting bar 5 is then cut at the time of sawing the slab, this sawing 7 allowing the loop 3 to take the zero position and causing the expansion of the concrete of the slab at the location of the joint.

Un joint antitassement suivant l'invention a l'avantage de pouvoir absorber des charges ou des chocs grâce à la flexibilité de la barre à béton 2 et à l'isolation 4 de la boucle 3, ce quia pour effet d'éviter les fissures et les tassements différentiels.A compression seal according to the invention has the advantage of being able to absorb loads or shocks thanks to the flexibility of the concrete bar 2 and the insulation 4 of the loop 3, which has the effect of avoiding cracks and differential settlements.

Claims (2)

1. Procédé de réalisation d'un joint antitassement pour dalle en béton, caractérisé en ce qu'il consiste à poser sur des écarteurs (1) une barre à béton (2) pourvue en sa partie centrale d'une boucle (3) dirigée vers le bas, à mettre en force ladite boucle (3) par une barre d'attente (5) soudée horizontalement sur la barre à béton (2) au-dessus de la boucle (3), à couler la dalle (6) et à scier la dalle (6) en coupant la barre d'attente (5), de telle manière que la boucle (3) prend la position zéro et le béton se dilate à l'endroit du joint.1. A method of producing an anti-settlement joint for a concrete slab, characterized in that it consists in placing on spacers (1) a concrete bar (2) provided in its central part with a loop (3) directed downwards, to force said loop (3) by a waiting bar (5) welded horizontally on the concrete bar (2) above the loop (3), to pour the slab (6) and sawing the slab (6) by cutting the waiting bar (5), so that the loop (3) takes the zero position and the concrete expands at the joint. 2. Procédé suivant la revendication 1, caractérisé en ce que la boucle (3) est traitée antirouille et gainée d'une isolation (4).2. Method according to claim 1, characterized in that the loop (3) is anti-rust treated and sheathed with insulation (4).
EP84200382A 1983-03-22 1984-03-16 Process for making a settlement-opposing joint Withdrawn EP0119663A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6/47799A BE896244A (en) 1983-03-22 1983-03-22 Anti subsidence joint for concrete blocks - incorporates metallic channel which receives edges of adjacent blocks
BE6047799 1983-03-22

Publications (2)

Publication Number Publication Date
EP0119663A2 true EP0119663A2 (en) 1984-09-26
EP0119663A3 EP0119663A3 (en) 1986-01-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200382A Withdrawn EP0119663A3 (en) 1983-03-22 1984-03-16 Process for making a settlement-opposing joint

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EP (1) EP0119663A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB606357A (en) * 1944-09-16 1948-08-12 Thomas Swan & Company Ltd Contraction joint for concrete roads and the like
FR2085818A1 (en) * 1970-04-03 1971-12-31 Bekaert Cockerill Nv Sa
LU66657A1 (en) * 1972-04-20 1973-02-14
FR2337787A1 (en) * 1976-01-08 1977-08-05 Sip Sprl ELEMENT FOR THE CONSTRUCTION OF REMOVAL OR EXPANSION JOINTS AND COMPOSITE ELEMENT OBTAINED WITH THIS ELEMENT

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB606357A (en) * 1944-09-16 1948-08-12 Thomas Swan & Company Ltd Contraction joint for concrete roads and the like
FR2085818A1 (en) * 1970-04-03 1971-12-31 Bekaert Cockerill Nv Sa
LU66657A1 (en) * 1972-04-20 1973-02-14
FR2337787A1 (en) * 1976-01-08 1977-08-05 Sip Sprl ELEMENT FOR THE CONSTRUCTION OF REMOVAL OR EXPANSION JOINTS AND COMPOSITE ELEMENT OBTAINED WITH THIS ELEMENT

Also Published As

Publication number Publication date
EP0119663A3 (en) 1986-01-29

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