EP0781887B1 - Process and apparatus for making cold bituminous dense products - Google Patents

Process and apparatus for making cold bituminous dense products Download PDF

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Publication number
EP0781887B1
EP0781887B1 EP96402835A EP96402835A EP0781887B1 EP 0781887 B1 EP0781887 B1 EP 0781887B1 EP 96402835 A EP96402835 A EP 96402835A EP 96402835 A EP96402835 A EP 96402835A EP 0781887 B1 EP0781887 B1 EP 0781887B1
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EP
European Patent Office
Prior art keywords
emulsion
ebpf
elements
esbpf
supply
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EP96402835A
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German (de)
French (fr)
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EP0781887A1 (en
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André Clarac
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Colas SA
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Colas SA
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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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
    • E01C19/1045—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers the mixture being discharged continuously
    • 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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
    • E01C19/1068—Supplying or proportioning the ingredients

Definitions

  • the invention relates to a process for obtaining cold of dense bituminous mixes by total selective coating.
  • the invention also relates to a device for setting process work.
  • the present invention relates to dense bituminous mixes consisting of large elements and fine elements, the large elements being elements of particle size between 2 and 31.5 mm and the elements purposes being elements of particle size between 0 and 6 mm.
  • dense bituminous mixes likely to be stored are usually obtained using a hot. This hot technique involves heating, either aggregates, or the coating binder.
  • the document EP-A-0524031 describes a process for make dense bituminous mixes with a double coating according to which we successively add in a large elements mixer, a first emulsion, fine elements and a second emulsion, and we mix the assembly for a sufficient time to obtain a homogeneous mixture capable of being stored.
  • the object of the invention is to overcome these drawbacks, and in particular to simplify the process, for example, by elimination of the ripening or storage period intermediate, and reduce production time and production costs.
  • the object of the invention is achieved by a method cold asphalt for dense bituminous mixes by coating total selective, including the stages: introduction of large elements in a mixer, introduction of a first emulsion dosed so as to obtain a binder film homogeneous and uniform on large elements, introduction fine elements and a second emulsion dosed for obtain a total coating of the mixture;
  • the cumulative dosage of two emulsions between 6 and 10%, is suitable for function of the richness module sought for the mixture.
  • the second emulsion is obtained during mixing from the first emulsion by adding an agent to it.
  • the second emulsion is obtained by mixing the first emulsion with an agent cationic aqueous, hereinafter also called SV solution.
  • the first emulsion is a cationic emulsion with medium failure composed of pure bitumen or bitumen cutback.
  • the second emulsion is a cationic emulsion stabilized composed of pure bitumen or fluidized bitumen.
  • the SV solution advantageously includes additives which make it possible to obtain an emulsion having a viscosity between 3 and 1000 STV.
  • the SV solution is composed of surfactants and acids in quality and quantity necessary to obtain a good coating of the mixture of large elements and fine elements, as well as sufficient maneuverability to ensure, in good conditions, transport and implementation of the dense asphalt when cold.
  • the SV solution is advantageously dosed correctly 0.5 to 2% of the mixture of large and fine elements.
  • the object of the invention is also achieved by a device for the cold production of dense bituminous mixes by total selective coating.
  • This device includes a mixer, first supply means intended for the addition of large components, second means of supply intended for the addition of fine elements, third means of contribution intended for the addition of water, fourth means of supply intended for the addition of a first emulsion, and fifths supply means intended for the addition of a second emulsion.
  • the device comprises also means of distributing the flow of the first emulsion allowing to derive a part of it for the preparation of the second emulsion by mixing the part derived from the first emulsion with an agent provided by of the sixth means of contribution, the fourth and fifth supply means being arranged so that the first and second emulsion enter the mixer at a defined distance from each other.
  • the distance between the place of mixing of the first emulsion with the agent and the place of introduction of the second emulsion into the mixer is greater than 1 m.
  • the necessary water can be introduced into the fifths means of supplying the second emulsion, downstream of the introduction of the SV solution.
  • Figure 1 single figure, shows schematically the process of the invention and the means for implementing it artwork.
  • the continuous process of the present invention provides performs a total selective coating of a material composed of large elements GG and fine elements GF, in a mixer 1 in which we first introduce the big GG elements fed by a first conveyor 2.
  • the large elements have particle size 2/6, 2/10, 2/14, 2/20 or 4/6, 4/10 or 4/14 or 6/10, 6/14, 6/20.
  • water is introduced by means of a first line 3 and a first EBPF emulsion (pure / fluidized bitumen emulsion) using a second pipeline 4.
  • the first bitumen emulsion EBPF consists of a pure bitumen of grade 25/35 to 180/220 or of a fluidized bitumen. Pure bitumen corresponds to those normally used for obtaining non-storable mixes applied in layers of foundation or rolling. Fluidized bitumen has a viscosity adapted to the duration of storage of the mix and to the procedure of implementation, either manual or mechanized.
  • the EBPF emulsion is an ECM65 type emulsion or ECM69, IREC ⁇ 140.
  • the second ESBPF emulsion obtained after the introduction of an aqueous cationic agent, i.e. a SV solution, in the first EBPF emulsion, is a ECL type emulsion, IREC> 180.
  • the SV solution is composed of surfactants such as tallow propylene polyamine and acids such as hydrochloric acid and petroleum thinner.
  • the quantity and quantity of these two groups of additives are chosen so as to obtain a second emulsion having a viscosity between 3 and 1000 STV.
  • the SV solution itself is stable for several weeks at a viscosity between 0.2 and 4 poises and can be stored at room temperature in a tank.
  • the continuous process of the present invention provides thus a significant time saving compared to others processes by the fact that there is no intermediate storage of any granular fraction, or setting of the material.
  • the continuous process of the present invention is more simple to implement insofar as it requires the preparation of a single emulsion.
  • the device for the cold production of dense asphalt bituminous by total selective coating shown schematically in Figure 1 includes a mixer 1 driven by a motor 7.
  • the mixer 1 is provided with two axes 8 and 9 each of which is provided with elements 10 formed and arranged to ensure a good mixture of successively added components in the mixer.
  • the mixer 1 has a first end 11 to which is located a first entrance 31 as well as a second end 12 at which an outlet 22 is located mixer.
  • Large GG elements are introduced in the kneader by first means of supply which includes the first conveyor 2.
  • Conveyor 2 is arranged at the entrance 31 of mixer 1 so that the large elements GG y enter, either directly or, for example, by means of a chute.
  • the fine elements GF are introduced later in the mixer 1 by means of second supply means of which part the second conveyor 5 arranged such that the elements GF ends enter mixer 1 through a second inlet 32 located approximately in the middle of the mixer 1.
  • the water necessary to obtain a homogeneous mixture different components added successively in the mixer 1, is introduced by third supply means essentially comprising a first pipe 3 arranged close to the first inlet 31 of the mixer 1.
  • the fourth supply means comprising a pump 14 connected by a pipe 15 to a distribution valve 16 and the second pipe 4 intended for the addition of the first EBPF emulsion to large GG elements.
  • the first EBPF emulsion is stored in a tank 13 from which it is pumped by means of the pump 14 and through the pipe 15 to the valve distribution 16.
  • the distribution valve 16 divides the flow of the first EBPF emulsion in a first partial quantity entering via the second line 4 into the mixer 1 and a second partial quantity passing through a pipeline 17 towards fifth means of contribution including the third pipe 6.
  • the volume ratio between the quantity passing through the second line 4 and the quantity passing through line 17 is chosen from drifting from about 40:60 to about 60:40 approximately 40 to 60% of the flow of the first EBPF emulsion for the preparation of the second ESBPF emulsion.
  • Line 17 is connected to the third line 6, by a mixer 21.
  • This mixer 21 is formed by a connection piece having a connection double on one side, intended for connection of pipes 17 and 20, and a simple connector on the other side, intended for pipe connection 6.
  • the SV solution is stored in a reservoir 18 and is supplied to mixer 21 by sixth supply means comprising a pump 19 and a pipe 20.
  • the SV solution is introduced into the third line 6 to be mixed with the first EBPF emulsion to obtain the second ESBPF emulsion.
  • the third line 6 is arranged in the mixer 1 so that the second ESBPF emulsion is introduced into the mixer 1 after the fine elements GF have been introduced into the mixer.
  • the distance between the mixer 21, that is to say between the stitching location of the first EBPF emulsion for the introduction of the SV solution, and a mouth of the pipe 6 in the mixer 1, must be greater than 1 m to ensure good dispersion of the SV solution in the first EBPF emulsion.
  • the addition water necessary for good dispersion of the ESBPF emulsion in the mixture of large GG elements and GF fine elements can be introduced at by means of a line 24 connected to line 6 in one junction point 25 arranged downstream of the introduction of the SV solution.
  • the dense bituminous mixes obtained in the mixer 1 exit from it through an outlet 22 where they are taken into loads, for example, by means of transport the routing to storage or application places.
  • the SV solution intended to be added to the first EBPF emulsion to obtain the second ESBPF emulsion can advantageously be the COLSTAB solution (brand Mark).

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  • Working-Up Tar And Pitch (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
  • Road Paving Machines (AREA)
  • Road Paving Structures (AREA)
  • Organic Insulating Materials (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

The system for obtaining dense cold bituminous coating comprises a mixer (1), transportation (2) for the addition of large elements, transportation (5) for the addition of fine elements (GF), transportation (4) for adding a first emulsion and transportation (6) for the second emulsion. Large elements (GG) are introduced into the mixer. A measured first emulsion (EBPF) is then introduced to obtain a homogeneous and uniform binding film on the large elements. A measured second emulsion (ES-BPF) is introduced to obtain a total coating of the mixture. The second emulsion is obtained from the first emulsion during mixing by adding a cationic aqueous agent (SV). This cationic agent comprises additives which enable obtaining a second emulsion with a viscosity between 3 and 1000 STV. The cationic agent is measured in the ratio of 0.5 to 2% of the mixture of large elements and fine elements.

Description

L'invention concerne un procédé d'obtention à froid d'enrobés denses bitumineux par enrobage sélectif total. L'invention concerne également un dispositif pour la mise en oeuvre du procédé.The invention relates to a process for obtaining cold of dense bituminous mixes by total selective coating. The invention also relates to a device for setting process work.

Plus particulièrement, la présente invention concerne des enrobés denses bitumineux constitués de gros éléments et d'éléments fins, les gros éléments étant des éléments de granulométrie comprise entre 2 et 31,5 mm et les éléments fins étant des éléments de granulométrie comprise entre 0 et 6 mm. De tels enrobés denses bitumineux susceptibles d'être stockés sont généralement obtenus selon une technique à chaud. Cette technique à chaud implique de chauffer, soit les granulats, soit le liant d'enrobage.More particularly, the present invention relates to dense bituminous mixes consisting of large elements and fine elements, the large elements being elements of particle size between 2 and 31.5 mm and the elements purposes being elements of particle size between 0 and 6 mm. Such dense bituminous mixes likely to be stored are usually obtained using a hot. This hot technique involves heating, either aggregates, or the coating binder.

Cependant, le chauffage qui est nécessaire conduit à des coûts de production importants.However, the necessary heating leads to significant production costs.

Ainsi, on a déjà proposé des procédés de fabrication à froid d'enrobés denses bitumineux. Le document FR-A-2.623.219 décrit un procédé pour fabriquer à froid des enrobés denses bitumineux stockables dans lequel on sépare l'enrobage des matériaux en fonction de leur granulométrie. Plus particulièrement, on enrobe d'abord les éléments fins de granulométrie 0/2 ou 0/4 mm avec une émulsion cationique de liant bitumineux renfermant du bitume fluidifié. Les matériaux ainsi enrobés sont ensuite stockés.Thus, manufacturing methods have already been proposed. cold of dense bituminous mixes. Document FR-A-2.623.219 describes a process for cold manufacturing dense bituminous coated mixes in which we separate coating of materials according to their particle size. More particularly, the thin elements of 0/2 or 0/4 mm particle size with a cationic emulsion of bituminous binder containing fluidized bitumen. The materials thus coated are then stored.

On réalise par ailleurs l'enrobage des gros éléments en utilisant une émulsion cationique de bitume fluxé ou fluidifié différente de celle utilisée pour les éléments fins.We also carry out the coating of large elements using a cationic emulsion of fluxed bitumen or fluidized different from that used for fine elements.

On incorpore ensuite les éléments fins, préalablement enrobés et qui ont été stockés, aux gros éléments également enrobés, et on continue le malaxage pendant quelques secondes pour obtenir à la fin un produit susceptible d'être stocké.Then incorporate the fine elements, beforehand coated and which have been stored, also with large elements coated, and we continue mixing for a few seconds to obtain at the end a product likely to be stored.

Ce procédé connu donne satisfaction, mais impose une étape de mûrissement ou de stockage d'une fraction granulaire de plusieurs jours. De plus, la reprise de cette fraction préalablement enrobée conduit à des coûts de main d'oeuvre importants.This known process is satisfactory, but requires a stage of ripening or storage of a fraction granular for several days. In addition, the resumption of this previously coated fraction leads to labor costs important works.

Le document EP-A-0524031 décrit un procédé pour fabriquer des enrobés denses bitumineux par un double enrobage selon lequel on ajoute, successivement, dans un malaxeur les gros éléments, une première émulsion, les éléments fins et une seconde émulsion, et on malaxe l'ensemble selon une durée suffisante pour obtenir un mélange homogène susceptible d'être stocké.The document EP-A-0524031 describes a process for make dense bituminous mixes with a double coating according to which we successively add in a large elements mixer, a first emulsion, fine elements and a second emulsion, and we mix the assembly for a sufficient time to obtain a homogeneous mixture capable of being stored.

Le but de l'invention est de pallier ces inconvénients, et notamment de simplifier le procédé, par exemple, par suppression de la période de mûrissement ou de stockage intermédiaire, et de réduire le temps de production et les coûts de production.The object of the invention is to overcome these drawbacks, and in particular to simplify the process, for example, by elimination of the ripening or storage period intermediate, and reduce production time and production costs.

Le but de l'invention est atteint par un procédé d'obtention à froid d'enrobés denses bitumineux par enrobage sélectif total, comprenant les étapes: introduction de gros éléments dans un malaxeur, introduction d'une première émulsion dosée de manière à obtenir un film de liant homogène et uniforme sur les éléments gros, introduction d'éléments fins et d'une deuxième émulsion dosée pour obtenir un enrobage total du mélange; Le dosage cumulé des deux émulsions compris entre 6 et 10%, est adapté en fonction du module de richesse recherché pour le mélange.The object of the invention is achieved by a method cold asphalt for dense bituminous mixes by coating total selective, including the stages: introduction of large elements in a mixer, introduction of a first emulsion dosed so as to obtain a binder film homogeneous and uniform on large elements, introduction fine elements and a second emulsion dosed for obtain a total coating of the mixture; The cumulative dosage of two emulsions between 6 and 10%, is suitable for function of the richness module sought for the mixture.

Conformément à l'invention, la deuxième émulsion est obtenue pendant le malaxage à partir de la première émulsion par ajout d'un agent à cette dernière.According to the invention, the second emulsion is obtained during mixing from the first emulsion by adding an agent to it.

Plus particulièrement, la deuxième émulsion est obtenue par mélange de la première émulsion avec un agent cationique aqueux, appelé par la suite aussi solution SV.More particularly, the second emulsion is obtained by mixing the first emulsion with an agent cationic aqueous, hereinafter also called SV solution.

La première émulsion est une émulsion cationique à rupture moyenne composée de bitume pur ou de bitume fluidifié.The first emulsion is a cationic emulsion with medium failure composed of pure bitumen or bitumen cutback.

La deuxième émulsion est une émulsion cationique stabilisée composée de bitume pur ou de bitume fluidifié. The second emulsion is a cationic emulsion stabilized composed of pure bitumen or fluidized bitumen.

La solution SV comprend avantageusement des additifs qui permettent d'obtenir une émulsion ayant une viscosité comprise entre 3 et 1000 STV.The SV solution advantageously includes additives which make it possible to obtain an emulsion having a viscosity between 3 and 1000 STV.

La solution SV est composée de surfactifs et d'acides en qualité et quantité nécessaire à l'obtention d'un bon enrobage du mélange des gros éléments et des éléments fins, ainsi que d'une maniabilité suffisante pour assurer, dans de bonnes conditions, le transport et la mise en oeuvre de l'enrobé dense à froid.The SV solution is composed of surfactants and acids in quality and quantity necessary to obtain a good coating of the mixture of large elements and fine elements, as well as sufficient maneuverability to ensure, in good conditions, transport and implementation of the dense asphalt when cold.

La solution SV est avantageusement dosée à raison de 0,5 à 2% du mélange de gros éléments et d'éléments fins.The SV solution is advantageously dosed correctly 0.5 to 2% of the mixture of large and fine elements.

Le but de l'invention est également atteint par un dispositif pour l'obtention à froid d'enrobés denses bitumineux par enrobage sélectif total. Ce dispositif comprend un malaxeur, des premiers moyens d'apport destinés à l'ajout de gros éléments, des deuxièmes moyens d'apport destinés à l'ajout d'éléments fins, des troisièmes moyens d'apport destinés à l'ajout d'eau, des quatrièmes moyens d'apport destinés à l'ajout d'une première émulsion, et des cinquièmes moyens d'apport destinés à l'ajout d'une deuxième émulsion.The object of the invention is also achieved by a device for the cold production of dense bituminous mixes by total selective coating. This device includes a mixer, first supply means intended for the addition of large components, second means of supply intended for the addition of fine elements, third means of contribution intended for the addition of water, fourth means of supply intended for the addition of a first emulsion, and fifths supply means intended for the addition of a second emulsion.

Conformément à l'invention, le dispositif comprend également des moyens de répartition du flux de la première émulsion permettant d'en dériver une partie pour la préparation de la deuxième émulsion par mélange de la partie dérivée de la première émulsion avec un agent apporté par des sixièmes moyens d'apport, les quatrièmes et cinquièmes moyens d'apport étant disposés de manière à ce que la première et la deuxième émulsion entrent dans le malaxeur à une distance définie l'une de l'autre.According to the invention, the device comprises also means of distributing the flow of the first emulsion allowing to derive a part of it for the preparation of the second emulsion by mixing the part derived from the first emulsion with an agent provided by of the sixth means of contribution, the fourth and fifth supply means being arranged so that the first and second emulsion enter the mixer at a defined distance from each other.

Avantageusement, la distance entre l'endroit de mélange de la première émulsion avec l'agent et l'endroit d'introduction de la deuxième émulsion dans le malaxeur est supérieure à 1 m.Advantageously, the distance between the place of mixing of the first emulsion with the agent and the place of introduction of the second emulsion into the mixer is greater than 1 m.

Pour obtenir une bonne dispersion de la deuxième émulsion dans le mélange des gros éléments et éléments fins, l'eau nécessaire peut être introduite dans les cinquièmes moyens d'apport de la deuxième émulsion, en aval de l'introduction de la solution SV.To obtain good dispersion of the second emulsion in the mixture of large and fine elements, the necessary water can be introduced into the fifths means of supplying the second emulsion, downstream of the introduction of the SV solution.

Les principaux avantages de l'invention sont les suivants:

  • Il suffit de fabriquer une seule émulsion et de la stocker en usine ou en centrale d'enrobage.
  • Le procédé permet de travailler avec des émulsions dont la température est supérieure à 50°C, ce qui assure une meilleure tenue du film de liant sur la fraction des gros éléments.
  • Une seule pompe est nécessaire pour maítriser le dosage en liant.
  • La maniabilité de l'enrobé peut être modulé durant l'enrobage en fonction des délais de transport, des conditions climatiques et de mise en oeuvre sans perturber la qualité d'enrobage des gros éléments.
The main advantages of the invention are as follows:
  • It suffices to make a single emulsion and store it in the factory or in a coating plant.
  • The process makes it possible to work with emulsions whose temperature is above 50 ° C., which ensures better resistance of the binder film on the fraction of large elements.
  • A single pump is necessary to control the dosage by binding.
  • The maneuverability of the mix can be adjusted during the coating depending on the transport times, the climatic conditions and the implementation without disturbing the quality of coating of the large elements.

D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description détaillée d'un exemple de réalisation du procédé de l'invention ainsi que de la description d'un exemple de réalisation du dispositif de l'invention, description faite à l'aide de la Figure unique jointe à la présente demande.Other characteristics and advantages of the invention will emerge on reading the detailed description of a example of carrying out the method of the invention as well as the description of an exemplary embodiment of the the invention, description made using the single Figure attached to this request.

La Figure 1, figure unique, montre schématiquement le procédé de l'invention et les moyens pour sa mise en oeuvre.Figure 1, single figure, shows schematically the process of the invention and the means for implementing it artwork.

Le procédé continu de la présente invention met en oeuvre un enrobage sélectif total d'un matériau composé de gros éléments GG et d'éléments fins GF, dans un malaxeur 1 dans lequel on introduit d'abord les gros éléments GG alimentés par un premier convoyeur 2. Les gros éléments ont une granulométrie 2/6, 2/10, 2/14, 2/20 ou 4/6, 4/10 ou 4/14 ou 6/10, 6/14, 6/20.The continuous process of the present invention provides performs a total selective coating of a material composed of large elements GG and fine elements GF, in a mixer 1 in which we first introduce the big GG elements fed by a first conveyor 2. The large elements have particle size 2/6, 2/10, 2/14, 2/20 or 4/6, 4/10 or 4/14 or 6/10, 6/14, 6/20.

Ensuite, on introduit de l'eau au moyen d'une première canalisation 3 et une première émulsion EBPF (émulsion de bitume pur/fluidifié) au moyen d'une deuxième canalisation 4.Then, water is introduced by means of a first line 3 and a first EBPF emulsion (pure / fluidized bitumen emulsion) using a second pipeline 4.

Plus loin, dans le malaxeur, considéré dans la direction de l'évolution du matériau à enrober à l'intérieur du malaxeur, on introduit les éléments fins GF ayant une granulométrie 0/2, 0/4 ou 0/6 au moyen d'un deuxième convoyeur 5 ainsi qu'une deuxième émulsion ESBPF (émulsion stabilisée de bitume pur/fluidifié) au moyen d'une troisième canalisation 6.Further on, in the mixer, considered in the direction of the evolution of the material to be coated inside the mixer, we introduce the fine elements GF having a grain size 0/2, 0/4 or 0/6 by means of a second conveyor 5 and a second emulsion ESBPF (stabilized emulsion of pure / fluidized bitumen) using a third line 6.

La première émulsion de bitume EBPF se compose d'un bitume pur de grade 25/35 à 180/220 ou d'un bitume fluidifié. Le bitume pur correspond à ceux utilisés normalement pour l'obtention d'enrobés non stockables appliqués en couches de fondation ou de roulement. Le bitume fluidifié a une viscosité adaptée à la durée de stockage de l'enrobé et à la procédure de mise en oeuvre, soit manuelle, soit mécanisée.The first bitumen emulsion EBPF consists of a pure bitumen of grade 25/35 to 180/220 or of a fluidized bitumen. Pure bitumen corresponds to those normally used for obtaining non-storable mixes applied in layers of foundation or rolling. Fluidized bitumen has a viscosity adapted to the duration of storage of the mix and to the procedure of implementation, either manual or mechanized.

L'émulsion EBPF est une émulsion du type ECM65 ou ECM69, IREC < 140.The EBPF emulsion is an ECM65 type emulsion or ECM69, IREC <140.

La deuxième émulsion ESBPF, obtenue après l'introduction d'un agent cationique aqueux, c'est-à-dire d'une solution SV, dans la première émulsion EBPF, est une émulsion du type ECL, IREC > 180.The second ESBPF emulsion, obtained after the introduction of an aqueous cationic agent, i.e. a SV solution, in the first EBPF emulsion, is a ECL type emulsion, IREC> 180.

La solution SV est composée de surfactifs tels que suif propylène polyamine et d'acides tels que l'acide chlorhydrique et de fluidifiant pétrolier.The SV solution is composed of surfactants such as tallow propylene polyamine and acids such as hydrochloric acid and petroleum thinner.

La quantité et la quantité de ces deux groupes d'additifs sont choisies de manière à obtenir une deuxième émulsion ayant une viscosité comprise entre 3 et 1000 STV. La solution SV elle-même est stable pendant plusieurs semaines à une viscosité comprise entre 0,2 et 4 poises et peut être stockée à température ambiante dans une cuve.The quantity and quantity of these two groups of additives are chosen so as to obtain a second emulsion having a viscosity between 3 and 1000 STV. The SV solution itself is stable for several weeks at a viscosity between 0.2 and 4 poises and can be stored at room temperature in a tank.

Par le procédé décrit ci-avant, on obtient, en effectuant l'ajout successif des différentes composantes, des enrobés denses bitumineux prêts à l'emploi ou prêts au transport vers l'endroit de leur emploi.By the process described above, we obtain, by performing the successive addition of the various components, of the asphalt dense bituminous ready for use or ready for transport to the place of their employment.

Le procédé continu de la présente invention procure ainsi un gain de temps important par rapport à d'autres procédés par le fait qu'il n'y a pas de stockage intermédiaire d'une quelconque fraction granulaire, ni de prise du matériau. De plus, le procédé continu de la présente invention est plus simple à mettre en oeuvre dans la mesure où il requière la préparation d'une seule émulsion.The continuous process of the present invention provides thus a significant time saving compared to others processes by the fact that there is no intermediate storage of any granular fraction, or setting of the material. In addition, the continuous process of the present invention is more simple to implement insofar as it requires the preparation of a single emulsion.

Le dispositif pour l'obtention à froid d'enrobés denses bitumineux par enrobage sélectif total représenté schématiquement sur la Figure 1 comprend un malaxeur 1 entraíné par un moteur 7. Le malaxeur 1 est muni de deux axes 8 et 9 dont chacun est muni d'éléments 10 formés et agencés de manière à assurer un bon mélange des composantes successivement ajoutées dans le malaxeur.The device for the cold production of dense asphalt bituminous by total selective coating shown schematically in Figure 1 includes a mixer 1 driven by a motor 7. The mixer 1 is provided with two axes 8 and 9 each of which is provided with elements 10 formed and arranged to ensure a good mixture of successively added components in the mixer.

Le malaxeur 1 présente une première extrémité 11 à laquelle est située une première entrée 31 ainsi qu'une deuxième extrémité 12 à laquelle est située une sortie 22 du malaxeur.The mixer 1 has a first end 11 to which is located a first entrance 31 as well as a second end 12 at which an outlet 22 is located mixer.

Les gros éléments GG sont introduits dans le malaxeur par des premiers moyens d'apport dont fait partie le premier convoyeur 2. Le convoyeur 2 est disposé à l'entrée 31 du malaxeur 1 de manière telle que les gros éléments GG y entrent, soit directement, soit par exemple, au moyen d'une goulotte.Large GG elements are introduced in the kneader by first means of supply which includes the first conveyor 2. Conveyor 2 is arranged at the entrance 31 of mixer 1 so that the large elements GG y enter, either directly or, for example, by means of a chute.

Les éléments fins GF sont introduits plus loin dans le malaxeur 1 au moyen de deuxièmes moyens d'apport dont fait partie le deuxième convoyeur 5 disposé tel, que les éléments fins GF entrent dans le malaxeur 1 par une deuxième entrée 32 située à peu près au milieu du malaxeur 1.The fine elements GF are introduced later in the mixer 1 by means of second supply means of which part the second conveyor 5 arranged such that the elements GF ends enter mixer 1 through a second inlet 32 located approximately in the middle of the mixer 1.

L'eau nécessaire pour obtenir un mélange homogène des différentes composantes ajoutées successivement dans le malaxeur 1, est introduite par des troisièmes moyens d'apport comprenant essentiellement une première canalisation 3 disposée proche de la première entrée 31 du malaxeur 1.The water necessary to obtain a homogeneous mixture different components added successively in the mixer 1, is introduced by third supply means essentially comprising a first pipe 3 arranged close to the first inlet 31 of the mixer 1.

Egalement proche de la première entrée 31 du malaxeur 1 sont disposées des quatrièmes moyens d'apport comprenant une pompe 14 reliée par une canalisation 15 à une vanne de répartition 16 et la deuxième canalisation 4 destinée à l'ajout de la première émulsion EBPF aux gros éléments GG. Also close to the first entrance 31 of mixer 1 are arranged with the fourth supply means comprising a pump 14 connected by a pipe 15 to a distribution valve 16 and the second pipe 4 intended for the addition of the first EBPF emulsion to large GG elements.

La première émulsion EBPF est stockée dans un réservoir 13 à partir duquel elle est pompée au moyen de la pompe 14 et au travers de la canalisation 15 vers la vanne de répartition 16. La vanne de répartition 16 divise le flux de la première émulsion EBPF en une première quantité partielle entrant par la deuxième canalisation 4 dans le malaxeur 1 et une deuxième quantité partielle passant par une canalisation 17 vers des cinquièmes moyens d'apport comprenant la troisième canalisation 6. Le rapport volumique entre la quantité passant dans la deuxième canalisation 4 et la quantité passant dans la canalisation 17 est choisi parmi les rapports allant d'environ 40:60 à environ 60:40 dérivant environ 40 à 60% du flux de la première émulsion EBPF pour la préparation de la deuxième émulsion ESBPF.The first EBPF emulsion is stored in a tank 13 from which it is pumped by means of the pump 14 and through the pipe 15 to the valve distribution 16. The distribution valve 16 divides the flow of the first EBPF emulsion in a first partial quantity entering via the second line 4 into the mixer 1 and a second partial quantity passing through a pipeline 17 towards fifth means of contribution including the third pipe 6. The volume ratio between the quantity passing through the second line 4 and the quantity passing through line 17 is chosen from drifting from about 40:60 to about 60:40 approximately 40 to 60% of the flow of the first EBPF emulsion for the preparation of the second ESBPF emulsion.

La canalisation 17 est reliée à la troisième canalisation 6, par un mélangeur 21. Ce mélangeur 21 est formé par une pièce de raccordement présentant un raccord double d'un côté, destiné au raccordement des canalisations 17 et 20, et un raccord simple de l'autre côté, destiné au raccordement de la canalisation 6.Line 17 is connected to the third line 6, by a mixer 21. This mixer 21 is formed by a connection piece having a connection double on one side, intended for connection of pipes 17 and 20, and a simple connector on the other side, intended for pipe connection 6.

La solution SV est stockée dans un réservoir 18 et est apportée au mélangeur 21 par des sixièmes moyens d'apport comprenant une pompe 19 et une canalisation 20. Au mélangeur 21, la solution SV est introduite dans la troisième canalisation 6 pour y être mélangée avec la première émulsion EBPF afin d'obtenir la deuxième émulsion ESBPF. La troisième canalisation 6 est disposée dans le malaxeur 1 de manière telle que la deuxième émulsion ESBPF est introduite dans le malaxeur 1 après que les éléments fins GF aient été introduits dans le malaxeur.The SV solution is stored in a reservoir 18 and is supplied to mixer 21 by sixth supply means comprising a pump 19 and a pipe 20. Au mixer 21, the SV solution is introduced into the third line 6 to be mixed with the first EBPF emulsion to obtain the second ESBPF emulsion. The third line 6 is arranged in the mixer 1 so that the second ESBPF emulsion is introduced into the mixer 1 after the fine elements GF have been introduced into the mixer.

Par ailleurs, il convient de noter que la distance entre le mélangeur 21, c'est-à-dire entre l'endroit de piquage de la première émulsion EBPF pour l'introduction de la solution SV, et une embouchure de la canalisation 6 dans le malaxeur 1, doit être supérieure à 1 m pour assurer une bonne dispersion de la solution SV dans la première émulsion EBPF.Furthermore, it should be noted that the distance between the mixer 21, that is to say between the stitching location of the first EBPF emulsion for the introduction of the SV solution, and a mouth of the pipe 6 in the mixer 1, must be greater than 1 m to ensure good dispersion of the SV solution in the first EBPF emulsion.

Dans une variante représentée sur la Figure 1 par une ligne en pointillé 24, l'eau d'ajout nécessaire à une bonne dispersion de l'émulsion ESBPF dans le mélange des gros éléments GG et les éléments fins GF peut être introduite au moyen d'une canalisation 24 reliée à la canalisation 6 en un point de jonction 25 disposé en aval de l'introduction de la solution SV.In a variant shown in Figure 1 by a dotted line 24, the addition water necessary for good dispersion of the ESBPF emulsion in the mixture of large GG elements and GF fine elements can be introduced at by means of a line 24 connected to line 6 in one junction point 25 arranged downstream of the introduction of the SV solution.

Les enrobés denses bitumineux obtenus dans le malaxeur 1 en sortent par une sortie 22 où ils sont pris en charge, par exemple, par des moyens de transport les acheminant vers des lieux de stockage ou d'application.The dense bituminous mixes obtained in the mixer 1 exit from it through an outlet 22 where they are taken into loads, for example, by means of transport the routing to storage or application places.

La solution SV destinée à être ajoutée à la première émulsion EBPF pour obtenir la deuxième émulsion ESBPF peut avantageusement être la solution COLSTAB (marque déposée).The SV solution intended to be added to the first EBPF emulsion to obtain the second ESBPF emulsion can advantageously be the COLSTAB solution (brand Mark).

Les signes de référence insérés après les caractéristiques techniques mentionnées dans les revendications, ont pour seul but de faciliter la compréhension de ces dernières, et n'en limitent aucunement la portée.The reference signs inserted after the characteristics techniques mentioned in the claims have for the sole purpose of facilitating the understanding of these, and in no way limit its scope.

Claims (10)

  1. A process for cold preparation of dense bituminous coated material by total selective coating, comprising the following steps :
    injection of large elements (GG) into a kneading machine, the granulometry thereof ranging between 2 and 31.5 mm,
    injection of a first emulsion (EBPF) dosed in such a way as to prepare a binding film, homogeneous and uniform on the large elements (GG),
    injection of thin elements (GF), the granulometry thereof ranging between 0 and 6 mm and
    injection of a second emulsion (ESBPF) dosed in such a way as to prepare total coating of the mixture,
    characterised in that the second emulsion (ESBPF) is prepared from the first emulsion (EBPF) during the kneading operation by addition of an agent (SV).
  2. A process according to claim 1, characterised in that the second emulsion (ESBPF) is prepared by mixing of the first emulsion (EBPF) with an aqueous cationic agent (SV).
  3. A process according to the claim 2, characterised in that the aqueous cationic agent (SV) contains additives which enable to prepare a second emulsion with a viscosity ranging between 3 and 1000 STV.
  4. A process according to claim 2 or 3, characterised in that the aqueous cationic agent (SV) is dosed at the ratio of 0.5 to 2% of the mixture of the large elements and of the thin elements.
  5. An installation for cold preparation of dense bituminous coated material by total selective coating operation, comprising a kneading machine (1), first means of supply (2) designed for the addition of large elements (GG), the large elements having a granulometry ranging between 2 and 31.5 mm, second means of supply (5) designed for the addition of thin elements (GF),the thin elements having a granulometry ranging between 0 and 6 mm, third means of supply (3) designed for the addition of water, fourth means of supply (4) designed for the addition of a first emulsion (EBPF) and fifth means of supply (6) designed for the addition of a second emulsion (ESBPF) characterised in that it also comprises means of distribution (16) of the flux of the first emulsion (EBPF) enabling to derive a portion for the preparation of the second emulsion (ESBPF) by mixing the portion derived from the first emulsion (EBPF) with an agent (SV) returned by sixth means of supply (19, 20), whereby the fourth (4) and fifth (6) means of supply are arranged in such a way that the first and the second emulsions enter the kneading machine (1) at a defined distance from one another.
  6. An installation according to claim 5, characterised in that the distance between a mixing location (21) of the first emulsion (EBPF) with the agent (SV) and a location (23) for injecting the second emulsion (ESBPF) into the kneading machine is greater than 1 m.
  7. An installation according to claim 5 or 6, characterised in that the means of distribution (16) are formed by a distribution valve 40/60 deriving approximately 60% of the flux of the first emulsion (EBPF) for the preparation of the second emulsion (ESBPF).
  8. An installation according to claim 5 or 6, characterised in that the means of distribution (16) are formed by a distribution valve 60/40 deriving approximately 40% of the flux of the first emulsion (EBPF) for the preparation of the second emulsion (ESBPF).
  9. An installation according to any one of claims 5 to 8, characterised in that it comprises a duct (24) linked at a junction point (25) to the fifth means of supply (6) and enabling to supply the water necessary to good dispersion of the second emulsion (ESBPF) in the mixture of the large elements (GG) and thin elements (GF).
  10. An installation according to claim 9, characterised in that the junction point (25) is arranged downstream of the injection of the agent (SV) into the first emulsion (EBPF).
EP96402835A 1995-12-28 1996-12-19 Process and apparatus for making cold bituminous dense products Expired - Lifetime EP0781887B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9515677 1995-12-28
FR9515677A FR2743095B1 (en) 1995-12-28 1995-12-28 PROCESS FOR COLD BITUMINOUS DENSITY COATINGS AND DEVICE FOR CARRYING OUT SAID METHOD

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EP0781887A1 EP0781887A1 (en) 1997-07-02
EP0781887B1 true EP0781887B1 (en) 2002-08-14

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EP (1) EP0781887B1 (en)
AT (1) ATE222310T1 (en)
CZ (1) CZ383496A3 (en)
DE (1) DE69622981T2 (en)
DK (1) DK0781887T3 (en)
ES (1) ES2179921T3 (en)
FR (1) FR2743095B1 (en)
HU (1) HUP9603542A3 (en)
IS (1) IS4402A (en)
PL (1) PL317701A1 (en)
PT (1) PT781887E (en)
RO (1) RO116411B1 (en)

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Publication number Priority date Publication date Assignee Title
MD2122C2 (en) * 2002-05-02 2003-09-30 Сергей ДЫЛДА Process for bitumen obtaining
FR2847596B1 (en) 2002-11-21 2005-08-19 Demeter Technologie Sa PROCESS FOR THE MANUFACTURE, IN PARTICULAR COLD, OF A COATED, AND COATED OBTAINED BY CARRYING OUT SAID METHOD
FR2853918B1 (en) 2003-04-18 2005-06-24 Htp Est METHOD AND DEVICE FOR HOT IMPLEMENTATION OF A BITUMINOUS SPRAY
US7114843B2 (en) 2003-07-21 2006-10-03 Htp Est Method of manufacturing a bituminous coated aggregate mix
FR2960890B1 (en) 2010-06-04 2021-11-26 Eurovia PROCESS FOR MANUFACTURING COLD HYDROCARBON ASPHALT, COLD HYDROCARBON ASPHALT WITH CONTROLLED WORKABILITY AND THEIR USE FOR THE REALIZATION OF ROAD COATINGS
DE202010017924U1 (en) * 2010-12-06 2013-03-26 Joachim Eberhardt For asphalt installation suitable asphalt building material
FR3056609B1 (en) 2016-09-26 2018-09-14 Eurovia METHOD FOR INDENTING A HIGH-DENSITY RECYCLABLE HEAT EXCHANGER IN TERRESTRIAL INFRASTRUCTURE
EP4150000B1 (en) 2020-05-11 2024-03-27 Vinci Construction Cationic latex modified hydrocarbon binder emulsions and their use in the preparation of bituminous products
FR3121444B1 (en) 2021-04-02 2023-04-14 Eurovia Bituminous binders offering increased resistance to chemical attack
FR3131920A1 (en) 2022-01-17 2023-07-21 Eurovia Composition of clear binder and its applications for road surfaces and landscaping
FR3133202A1 (en) 2022-03-02 2023-09-08 Eurovia Process for manufacturing cold hydrocarbon mixes and cold hydrocarbon mixes with rapid cohesion build-up

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Publication number Priority date Publication date Assignee Title
FR2623219B1 (en) * 1987-11-17 1990-04-06 Maheas Rene METHOD FOR COLD MANUFACTURING STOCKABLE BITUMINOUS DENSITY COATINGS
FR2679274B1 (en) * 1991-07-19 1993-11-26 Colas Sa PROCESS FOR COLD BITUMINOUS DENSITY COATINGS.
DK179391D0 (en) * 1991-10-30 1991-10-30 Leo Hove PROCEDURE FOR MANUFACTURING EMULSION CONCRETE
CH685342A5 (en) * 1993-02-12 1995-06-15 Colas S A Colas S A Method for producing a mixture of an aggregate and a binder.

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HUP9603542A2 (en) 1997-09-29
FR2743095A1 (en) 1997-07-04
HUP9603542A3 (en) 1998-03-02
CZ383496A3 (en) 1997-07-16
HU9603542D0 (en) 1997-02-28
PL317701A1 (en) 1997-07-07
FR2743095B1 (en) 1998-03-20
PT781887E (en) 2002-12-31
ATE222310T1 (en) 2002-08-15
DK0781887T3 (en) 2002-12-09
DE69622981T2 (en) 2003-04-30
ES2179921T3 (en) 2003-02-01
EP0781887A1 (en) 1997-07-02
RO116411B1 (en) 2001-01-30
DE69622981D1 (en) 2002-09-19
IS4402A (en) 1997-06-29

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