EP1668184A2 - Method for cold production of a bituminous coating and corresponding device - Google Patents

Method for cold production of a bituminous coating and corresponding device

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Publication number
EP1668184A2
EP1668184A2 EP04816200A EP04816200A EP1668184A2 EP 1668184 A2 EP1668184 A2 EP 1668184A2 EP 04816200 A EP04816200 A EP 04816200A EP 04816200 A EP04816200 A EP 04816200A EP 1668184 A2 EP1668184 A2 EP 1668184A2
Authority
EP
European Patent Office
Prior art keywords
mix
temperature
binder
aggregates
cold
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.)
Granted
Application number
EP04816200A
Other languages
German (de)
French (fr)
Other versions
EP1668184B1 (en
Inventor
Bernard MAHÉ DE LA VILLEGLÉ
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.)
Colas SA
Original Assignee
Colas SA
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Filing date
Publication date
Application filed by Colas SA filed Critical Colas SA
Publication of EP1668184A2 publication Critical patent/EP1668184A2/en
Application granted granted Critical
Publication of EP1668184B1 publication Critical patent/EP1668184B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • 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
    • E01C19/46—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 and placing the materials, e.g. slurry seals
    • 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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders

Definitions

  • the invention relates to a method for manufacturing a cold bituminous mix for road surfaces, as well as to a device for manufacturing a cold bituminous mix for road surfaces.
  • Bituminous mixes are generally obtained by hot manufacturing (so-called “hot” mixes) or by cold manufacture (so-called “cold mixes”). Hot manufacturing consists of drying and heating aggregates to a temperature above 100 ° C, and kneading them with an anhydrous hydrocarbon binder, fluid and not very viscous at this temperature.
  • the hot manufacturing generally allows: - a good coating of all the fractions by dispersion of the binder in an intimate and homogeneous way, - an implementation at a sufficient temperature so that the spread and compacted asphalt reaches a level of compactness and characteristics aimed flatness in accordance with the rules usually used by those skilled in the art, - an increase in the mechanical resistance of the mix during cooling to achieve the necessary cohesion allowing the circulation of the roadway.
  • hot mixes are subject to increasing constraints related to the cost of fuels necessary for the rise in temperature, the sophistication of manufacturing plants and the increasingly strict framework of environmental laws. Hot mixes do not allow the use of bitumen emulsi, force materials to dry, require hot installations and cause the release of smoke and dust during manufacture.
  • Cold manufacturing consists in kneading aggregates, possibly moistened, with an emulsion-based hydrocarbon binder, which makes it not very viscous, at a temperature close to ambient temperature, that is to say generally at a temperature of 10 at 20 ° C, on average close to 15 ° C.
  • the aggregates can be pre-coated, before coating with the hydrocarbon binder in emulsion.
  • double coated cold mix we speak of double coated cold mix. Cold manufacturing allows the coated materials to be used at the manufacturing temperature close to room temperature, the coated material having a workability which depends on the ambient temperature, the choice of binder, the coalescence of the emulsion, the water content and reactivity of the aggregates with respect to the chemical nature of the binder.
  • Cold mixes overcome many of the constraints associated with hot mixes, but nevertheless have defects: on the one hand, the coating can be of poor quality, and on the other hand, the workability can be poor, which which can have consequences on the performance of the structure produced, in terms of elasticity, resistance to fatigue, resistance and cohesion of the surface (poor geometric quality of the surface).
  • the patent FR-2732239 generally describes a process which, starting from any cold mix, based on viscous bitumen, makes it possible, by non-drying heating, to open a hot mix and its installation in the vicinity of 100 ° C.
  • bituminous emulsions must be obtained in the mixers, that is to say, before the heating, the bituminous coating emulsion has undergone a change of state important and therefore of rheology.
  • reheating to a temperature of about 100 ° C, a relatively very high temperature will further significantly modify the rheology of the mix during laying.
  • the use of a drying drum of a hot coating station does not make it possible to obtain a controlled warming at a temperature of 30 to 65 ° C.
  • the aim of the present invention is therefore to remedy the above problems, and to propose a method for manufacturing a cold bituminous mix which makes it possible: - to control the coalescence of the emulsion of the bituminous binder; - to reduce the grade of the bituminous binder; - Improving the workability of the mix by reducing the viscosity of the bituminous binder and therefore increasing the compactness in place after implementation and compaction; to improve the cohesion and the speed of setting of cohesion of the mix in order to obtain an accelerated hardening of the surface, thus limiting the problems of sensitivity of surface resistance known in cold mixes of the prior art, and interfering with their development (for example, brands of tires for agricultural machinery during the first days of operation of the roadway); - to improve the quality of the coating of aggregates, which is decisive for the good resistance of the mix to the action of water, as well as to surface attack, plumage and mittage; - reduce the residual water content of the mix to increase the rate of ripening
  • the invention therefore relates to a process for the manufacture of a cold bituminous mix for road surfaces, obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said process comprising, after coating , and preferably without the bituminous binder emulsion having broken beforehand, one or more steps in heating the mix to obtain a temperature of the mix, at the time of its implementation, of 30 at 65 ° C.
  • the bituminous binder in coating emulsion is a cationic bitumen emulsion.
  • the aggregates can be pretreated with a hydrocarbon binder, before coating with the binder bituminous emulsion.
  • This pre-coating can be carried out either hot, for example with an anhydrous hydrocarbon binder, or cold, with a bituminous emulsion binder.
  • binders which can be used for pre-coating mention may be made of cationic bitumen emulsions and pure bitumens conventionally used as mixes for wearing courses.
  • This double coating allows a complete coating of all the aggregates. There is thus a reduction in the risks of segregation and an increase in the mechanical performance of the mix.
  • cold mix having been formulated by pre-coating and then coating mention may be made of COMPOMAC M2 marketed in addition by the company SCREG OUEST.
  • the temperature can be chosen in particular according to the nature of the binder, the water content of the mix and the weather conditions during the use of the mix. Generally, the temperature is raised so as to obtain a temperature at the time of processing from 30 to 65 ° C, preferably from 30 to 60 ° C, better from 40 to 60 ° C, and better still from 50 to 55 ° C, typically an increase from 15 to 40 ° C for an ambient temperature of 15 ° C.
  • processing temperature is meant the temperature of the mix during the epa ⁇ dage or compaction.
  • the choice of temperature rise is also made, possibly taking transport into account, so that the asphalt has the temperature required for its implementation. In all cases, care must be taken not to cause the vaporization of the water included in the mix.
  • bituminous coating emulsion according to the invention does not undergo any significant change of state and therefore of rheology before its implementation.
  • the process according to the invention can be used to manufacture all types of cold bituminous mixes.
  • the bituminous binder can be natural or synthetic.
  • the binder is generally a hydrocarbon binder chosen from road bitumens, pure bitumens, fluxed or fluidized bitumens, bitumens modified by polymers, semi-blown bitumens, bitumens partially modified by blown bitumen, and all combinations of these bitumens. Concrete modified by polymers are defined by the standard
  • styrene-butadiene copolymers examples include styrene-butadiene copolymers, styrene-isoprene copolymers, ethylene-vinyl acetate copolymers (EVA), terpolymers, such as for example the compound of an ethylenic chain with functional groups of butyl acrylate and methyl glycidyl acrylate which provides good stability to the bitumen / polymer mixture, the elastomers and plastomers allowing a significant improvement in the resistances to cracking and to homerage.
  • EVA ethylene-vinyl acetate copolymers
  • the aggregates generally have a particle size chosen from the range 0 / D ma ⁇ , D ma ⁇ being the maximum diameter of the aggregate as defined according to standard XP P 18-540 and generally ranging from 4 to 31.5 mm.
  • the aggregates used in the process according to the invention can be all types of aggregates usually used for the manufacture of bituminous mixes, for example natural or synthetic materials such as slag, slag, bottom ash, mixtures of mixtures, and mixtures of these materials in all proportions.
  • asphalt aggregates are recycling materials originating in particular from the milling of old bituminous coatings.
  • the warm bituminous asphalt mix according to the invention comprises from 5 to 12%, preferably from 7 to 10% by weight of binder relative to the weight of the aggregates.
  • the warm cold bituminous mix obtained by the process according to the invention can be opened (percentage of vacuum greater than 15% in volume), semi-dense (percentage of vacuum between 10 and 15% by volume) or dense (percentage of vacuum less than 10% by volume). This is obtained by varying in the final mixture the proportion of aggregates 0 / d, where 1 ⁇ d ⁇ x, where x can be equal to 2 mm, 4 mm or 6.3 mm.
  • the warm cold bituminous mix obtained by the process according to the invention can also be storable or non-storable.
  • the warm cold bituminous mix obtained by the process according to the invention can be, for example, a grave-emulsion, a bituminous concrete with an emulsion or a serious cold bitumen.
  • the method according to the invention comprises, after coating, one or more steps of raising the temperature of the mix by heating the mix to a temperature from 30 ° C to 65 ° C.
  • the asphalt obtained is possibly stored, then transported to the site of the site, if the coating has not been carried out on the site, to be implemented.
  • the asphalt mix is generally implemented by a spreading step on the road and a compacting step.
  • the cold mix is heated before spreading, that is to say after the coating and before or after transport to the place of application, if necessary, whether or not there is a storage phase, and / or during spreading and / or after spreading during compaction.
  • the flow of asphalt is generally between 50 and 250 tonnes / hour.
  • Heating leads to an increase in the temperature of the binder and of the water present in the mix.
  • the increase in the temperature of the binder will considerably modify its viscosity and therefore influence the quality of the coating and the workability of the mix.
  • the heating is carried out by one or more heating means chosen from infra-red radiation, ultra-violet radiation, microwave waves, high frequency waves and bringing the mix into contact with hot air.
  • the invention also relates to a process for manufacturing road surfaces with a cold bituminous mix obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said process comprising one or more stages of increase in the asphalt temperature as defined above.
  • the invention relates to a device for manufacturing a cold bituminous mix for road surfaces, obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said device comprising: - a hopper containing the aggregates before coating, - a mixer, on site or in a fixed position, allowing the coating of the aggregates with the binder, - an application table allowing the application of the mix on the pavement, - transfer elements from the mix to the application table, said device further comprising one or more means for raising the temperature of the mix to a temperature from 30 ° C. to 65 ° C.
  • the position of the means or means for raising the temperature of the aggregates and of the binder depends on the point or times at which this temperature rise takes place during the implementation of the cold bituminous mix.
  • a means for raising the temperature of the mix is positioned at the level of the mixer, the heating being of course carried out after the cold mix has been produced.
  • a means for raising the temperature of the mix is positioned after the mixer.
  • a means for raising the temperature of the mix is positioned at the level of the transfer elements of the mix.
  • the device according to the invention comprises a means for spreading the mix and a means for compacting the mix, a means for raising the temperature of the mix being positioned at the level of the means. for compacting the mix or between the spreading means and the compacting means.
  • a heating device suitable for implementing the method of the invention is an aggregate heating tube.
  • the invention is illustrated by the following example.
  • the aggregates used are ROL and POMPIER aggregates, the particle size of which is as follows: - class 0/4: 50% by weight - class 4/6: 10% by weight - class 6/10: 40% by weight
  • Bituminous binder represents 8% by weight of the weight of the asphalt.
  • the binder contains: - 65% by weight of bitumen ESSO PJ 70/100 (i.e. a bitumen content in the mix of 5.2% by weight) - 8 kg / tonne of Polyram S - 8 kg / T of acid hydrochloric
  • the coating of the aggregates with the bituminous binder is carried out cold in a mixer.
  • the initial water content in the coated materials obtained is 6% by weight.
  • the coated materials are brought to a temperature of 15 ° C (no temperature raising step according to the invention), 30 C C (the temperature was raised according to the invention) or possibly 50 ° C (the temperature was raised according to the invention).
  • Asphalt mixes are subjected to density and odor resistance measures.
  • the density is measured using a gyratory shear press.
  • the percentage of vacuum is measured at 10, 60 or 200 gir. according to standard NF P 98-252. The results are given in Table 2.
  • the homogeneity test is carried out according to standard NF P 95-253-2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Machines (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Chippings can be pre-coated with a hydrocarbonated binder. After coating, there are one or more stages of heating the surfacing to obtain a rise in temperature of the surfacing of 10-100[deg]C. The temperature is raised to obtain a temperature at the moment of use of 30 to 60[deg]C, preferably 40-60[deg]C, more preferably 50-55[deg]C. The cold surfacing obtained after surfacing is put into operation by spreading it on the road and compacting it. The cold surfacing is heated before and/or during spreading and/or after spreading during compacting. The heating is done by one or more heaters chosen from an infra-red radiator; an ultra-violet radiator; microwave waves; high frequency waves and putting the surfacing in contact with hot air. The binder is chosen from road bitumens; pure bitumens, fluxed or fluidized bitumens, bitumens partially modified by blown bitumen and all combinations of these. The cold bitumen surfacing contains between 5 and 12%, preferably between 7 and 10% chippings by weight. An independent claim is made for a device for the production of the above cold bitumen surfacing, with a hopper for the chippings before coating; a mixer on a lorry or in a fixed position, allowing the chippings to be coated with the binder; an application table allowing the surfacing to be applied to the road; means of transferring the surfacing to the application table, and means of heating the surfacing to a temperature between 10 and 100[deg]C. The heater(s) are by the mixer and/or after the mixer and/or by the means of transfer to the application table. The device also includes means of spreading and then compacting the surface with a heater on the compactor or between the spreader and the compactor.

Description

Procédé de fabrication d'un enrobé bitumineux à froid et dispositif Method for manufacturing a cold bituminous mix and device
L'invention se rapporte à un procédé de fabrication d'un enrobé bitumineux à froid pour revêtement routier, ainsi qu'à un dispositif de fabrication d'un enrobé bitumineux à froid pour revêtement routier. Les enrobés bitumineux sont généralement obtenus par fabrication à chaud (enrobés dits « à chaud ») ou bien par fabrication à froid (enrobés dits « à froid »). La fabrication à chaud consiste à sécher et à chauffer des granulats à une température supérieure à 100°C, et à les malaxer avec un liant hydrocarboné anhydre, fluide et peu visqueux à cette température. La fabrication à chaud permet généralement : - un bon enrobage de toutes les fractions par dispersion du liant de façon intime et homogène, - une mise en œuvre à une température suffisante pour que l'enrobé répandu et compacté atteigne un niveau de compacité et des caractéristiques de planéité visées conformes aux règles habituellement utilisées par l'homme du métier, - une augmentation de la résistance mécanique de l'enrobé au cours du refroidissement pour atteindre la cohésion nécessaire permettant la mise en circulation de la chaussée. Tout en donnant techniquement satisfaction, les enrobés à chaud sont sujets à des contraintes croissantes liées au coût des combustibles nécessaires à l'élévation de température, à la sophistication des usines de fabrication et aux cadres de plus en plus strictes des lois environnementales. Les enrobés à chaud ne permettent pas l'utilisation de l'émulsioπ de bitume, obligent à sécher les matériaux, nécessitent des installations à chaud et provoquent des dégagements de fumées et de poussières lors de la fabrication. La fabrication à froid consiste à malaxer des granulats, éventuellement humidifiés, avec un liant hydrocarboné mis en emulsion, ce qui le rend peu visqueux, à une température proche de la température ambiante, c'est-à-dire généralement à une température de 10 à 20°C, en moyenne voisine de 15°C. Eventuellement, les granulats peuvent faire l'objet d'un préenrobage, avant l'enrobage par le liant hydrocarboné en emulsion. On parle dans ce cas d'enrobés à froid à double enrobage. La fabrication à froid permet une mise en œuvre des enrobés à la température de fabrication proche de la température ambiante, l'enrobé ayant une maniabilité qui dépend de la température ambiante, du choix du liant, de la coalescence de l'émulsion, de la teneur en eau et de la réactivité des granulats par rapport à la nature chimique du liant. Les enrobés à froid s'affranchissent de beaucoup de contraintes liées aux enrobés à chaud, mais présentent toutefois des défauts : d'une part, l'enrobage peut être de qualité médiocre, et d'autre part, la maniabilité peut être faible, ce qui peut avoir des conséquences sur les performances de l'ouvrage réalisé, en terme d'élasticité, de résistance à la fatigue, de tenue et de cohésion de la surface (mauvaise qualité géométrique de la surface). Le brevet FR-2732239 décrit de manière générale un procédé qui, à partir d'un quelconque enrobé à froid, à base de bitume visqueux, permet d'obtenir, par un réchauffage non séchant, un enrobé chaud ouvrable et sa pose aux environs de 100°C. II est également indiqué dans ce brevet que la rupture adhésive au moins partielle des émulsions bitumineuses doit être obtenue dans les malaxeurs, c'est à dire, qu'avant le réchauffement, l'émulsion bitumineuse d'enrobage a subi un changement d'état d'important et donc de rhéologie. En outre, un réchauffage à une température d'environ 100°C, température relativement très élevée, va encore modifier notablement la rhéologie de l'enrobé lors de la pose. De plus, l'utilisation d'un tambour sécheur d'un poste d'enrobage à chaud ne permet pas d'obtenir un tiédissement contrôlé à une température de 30 à 65°C. Le but de la présente invention est donc de remédier aux problèmes précédents, et de proposer un procédé de fabrication d'un enrobé bitumineux à froid qui permet : - de maîtriser la coalescence de l'émulsion du liant bitumineux ; - de diminuer le grade du liant bitumineux ; - d'améliorer la maniabilité de l'enrobé par diminution de la viscosité du liant bitumineux et donc d'augmenter la compacité en place après mise en œuvre et compactage ; - d'améliorer la cohésion et la rapidité de prise de cohésion de l'enrobé afin d'obtenir un durcissement accéléré de la surface, limitant ainsi les problèmes de sensibilité de tenue de surface connus chez les enrobés à froid de l'art antérieur et gênant leur développement (par exemple, marques de pneus d'engins agricoles lors des premiers jours de la mise en exploitation de la chaussée) ; - d'améliorer la qualité de l'enrobage des granulats, ce qui est déterminant pour la bonne tenue de l'enrobé à l'action de l'eau, ainsi qu'aux agressions de surface, au plumage et au mittage ; - de diminuer la teneur en eau résiduelle de l'enrobé pour augmenter la vitesse de mûrissement des enrobés et donc réduire le délai de mise en circulation de la surface ; - d'augmenter les résistances mécaniques à terme ; A cet effet, la Demanderesse a découvert que l'utilisation d'une étape spécifique d'élévation de la température de l'enrobé bitumineux à froid après l'enrobage, c'est-à-dire après le malaxage des granulats et du liant, permettait d'atteindre les objectifs précédents et de résoudre les problèmes de l'art antérieur. L'invention concerne donc un procédé de fabrication d'un enrobé bitumineux à froid pour revêtement routier, obtenu par enrobage de granulats par un liant bitumineux en emulsion, les granulats pouvant être éventuellement préenrobés par liant hydrocarboné, ledit procédé comprenant, après l'enrobage, et de préférence sans qu'il y ait eu rupture préalable de l'émulsion de liant bitumineux, une ou plusieurs étapes de chauffage de l'enrobé pour obtenir une température de l'enrobé, au moment de sa mise en œuvre, de 30 à 65°C. De préférence, le liant bitumineux en emulsion d'enrobage est une emulsion cationique de bitume. Comme indiqué précédemment, les granulats peuvent être préenrobés par un liant hydrocarboné, avant l'enrobage par le liant bitumineux en emulsion. Ce préenrobage peut être effectué soit à chaud, par exemple avec un liant hydrocarboné anhydre, soit à froid, avec un liant bitumineux en emulsion. Comme liants utilisables pour le préenrobage, on peut citer les émulsions cationiques de bitume et les bitumes purs classiquement utilisés en enrobés pour les couches de roulement. Ce double enrobage (préenrobage puis enrobage) permet un enrobage complet de tous les granulats. Il y a ainsi une réduction des risques de ségrégation et une augmentation des performances mécaniques de l'enrobé. Comme enrobé à froid ayant été formulé par préenrobage puis enrobage, on peut citer le COMPOMAC M2 commercialisé en outre par la société SCREG OUEST. La température peut être choisie notamment en fonction de la nature du liant, de la teneur en eau de l'enrobé et des conditions météorologiques lors de l'utilisation de l'enrobé. Généralement, la température est élevée de manière à obtenir une température au moment de la mise en œuvre de 30 à 65°C, de préférence de 30 à 60°C, mieux de 40 à 60°C, et mieux encore de 50 à 55°C, typiquement une élévation de 15 à 40°C pour une température ambiante de 15°C. Par température de mise en œuvre, on entend la température de l'enrobé lors de l'épaπdage ou du compactage. Le choix de l'élévation de température se fait également compte tenu éventuellement du transport, de telle sorte que l'enrobé ait la température requise pour sa mise en œuvre. Dans tous les cas, on veillera à ne pas provoquer la vaporisation de l'eau comprise dans l'enrobé. Un aspect important du procédé de la présente invention dans une forme préférée est qu'il n'y a pas de rupture de l'émulsion de liant avant l'étape de chauffage et notamment il faut de préférence éviter toute rupture de l'émulsion dans les étapes de malaxage. Ainsi, l'émulsion bitumineuse d'enrobage selon l'invention ne subit pas de changement d'état important et donc de rhéologie avant sa mise en œuvre. Le procédé selon l'invention peut être utilisé pour fabriquer tous types d'enrobés bitumineux à froid. Ainsi, le liant bitumineux peut être naturel ou de synthèse. Le liant est généralement un liant hydrocarboné choisi parmi les bitumes routiers, les bitumes purs, les bitumes fluxés ou fluidifiés, les bitumes modifiés par des polymères, les bitumes semi-soufflés, les bitumes partiellement modifiés par du bitume soufflé, et toutes les combinaisons de ces bitumes. Les bétons modifiés par des polymères sont définis par la normeThe invention relates to a method for manufacturing a cold bituminous mix for road surfaces, as well as to a device for manufacturing a cold bituminous mix for road surfaces. Bituminous mixes are generally obtained by hot manufacturing (so-called "hot" mixes) or by cold manufacture (so-called "cold mixes"). Hot manufacturing consists of drying and heating aggregates to a temperature above 100 ° C, and kneading them with an anhydrous hydrocarbon binder, fluid and not very viscous at this temperature. The hot manufacturing generally allows: - a good coating of all the fractions by dispersion of the binder in an intimate and homogeneous way, - an implementation at a sufficient temperature so that the spread and compacted asphalt reaches a level of compactness and characteristics aimed flatness in accordance with the rules usually used by those skilled in the art, - an increase in the mechanical resistance of the mix during cooling to achieve the necessary cohesion allowing the circulation of the roadway. While technically satisfactory, hot mixes are subject to increasing constraints related to the cost of fuels necessary for the rise in temperature, the sophistication of manufacturing plants and the increasingly strict framework of environmental laws. Hot mixes do not allow the use of bitumen emulsi, force materials to dry, require hot installations and cause the release of smoke and dust during manufacture. Cold manufacturing consists in kneading aggregates, possibly moistened, with an emulsion-based hydrocarbon binder, which makes it not very viscous, at a temperature close to ambient temperature, that is to say generally at a temperature of 10 at 20 ° C, on average close to 15 ° C. Optionally, the aggregates can be pre-coated, before coating with the hydrocarbon binder in emulsion. In this case, we speak of double coated cold mix. Cold manufacturing allows the coated materials to be used at the manufacturing temperature close to room temperature, the coated material having a workability which depends on the ambient temperature, the choice of binder, the coalescence of the emulsion, the water content and reactivity of the aggregates with respect to the chemical nature of the binder. Cold mixes overcome many of the constraints associated with hot mixes, but nevertheless have defects: on the one hand, the coating can be of poor quality, and on the other hand, the workability can be poor, which which can have consequences on the performance of the structure produced, in terms of elasticity, resistance to fatigue, resistance and cohesion of the surface (poor geometric quality of the surface). The patent FR-2732239 generally describes a process which, starting from any cold mix, based on viscous bitumen, makes it possible, by non-drying heating, to open a hot mix and its installation in the vicinity of 100 ° C. It is also indicated in this patent that the at least partial adhesive rupture of the bituminous emulsions must be obtained in the mixers, that is to say, before the heating, the bituminous coating emulsion has undergone a change of state important and therefore of rheology. In addition, reheating to a temperature of about 100 ° C, a relatively very high temperature, will further significantly modify the rheology of the mix during laying. In addition, the use of a drying drum of a hot coating station does not make it possible to obtain a controlled warming at a temperature of 30 to 65 ° C. The aim of the present invention is therefore to remedy the above problems, and to propose a method for manufacturing a cold bituminous mix which makes it possible: - to control the coalescence of the emulsion of the bituminous binder; - to reduce the grade of the bituminous binder; - Improving the workability of the mix by reducing the viscosity of the bituminous binder and therefore increasing the compactness in place after implementation and compaction; to improve the cohesion and the speed of setting of cohesion of the mix in order to obtain an accelerated hardening of the surface, thus limiting the problems of sensitivity of surface resistance known in cold mixes of the prior art, and interfering with their development (for example, brands of tires for agricultural machinery during the first days of operation of the roadway); - to improve the quality of the coating of aggregates, which is decisive for the good resistance of the mix to the action of water, as well as to surface attack, plumage and mittage; - reduce the residual water content of the mix to increase the rate of ripening of the mix and therefore reduce the time required for the surface to circulate; - increase mechanical strength over time; To this end, the Applicant has discovered that the use of a specific step of raising the temperature of the bituminous mix when cold after coating, that is to say after the mixing of the aggregates and the binder , made it possible to achieve the above objectives and to solve the problems of the prior art. The invention therefore relates to a process for the manufacture of a cold bituminous mix for road surfaces, obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said process comprising, after coating , and preferably without the bituminous binder emulsion having broken beforehand, one or more steps in heating the mix to obtain a temperature of the mix, at the time of its implementation, of 30 at 65 ° C. Preferably, the bituminous binder in coating emulsion is a cationic bitumen emulsion. As indicated above, the aggregates can be pretreated with a hydrocarbon binder, before coating with the binder bituminous emulsion. This pre-coating can be carried out either hot, for example with an anhydrous hydrocarbon binder, or cold, with a bituminous emulsion binder. As binders which can be used for pre-coating, mention may be made of cationic bitumen emulsions and pure bitumens conventionally used as mixes for wearing courses. This double coating (pre-coating then coating) allows a complete coating of all the aggregates. There is thus a reduction in the risks of segregation and an increase in the mechanical performance of the mix. As cold mix having been formulated by pre-coating and then coating, mention may be made of COMPOMAC M2 marketed in addition by the company SCREG OUEST. The temperature can be chosen in particular according to the nature of the binder, the water content of the mix and the weather conditions during the use of the mix. Generally, the temperature is raised so as to obtain a temperature at the time of processing from 30 to 65 ° C, preferably from 30 to 60 ° C, better from 40 to 60 ° C, and better still from 50 to 55 ° C, typically an increase from 15 to 40 ° C for an ambient temperature of 15 ° C. By processing temperature is meant the temperature of the mix during the epaπdage or compaction. The choice of temperature rise is also made, possibly taking transport into account, so that the asphalt has the temperature required for its implementation. In all cases, care must be taken not to cause the vaporization of the water included in the mix. An important aspect of the process of the present invention in a preferred form is that there is no rupture of the binder emulsion before the heating step and in particular it is preferable to avoid any rupture of the emulsion in the mixing stages. Thus, the bituminous coating emulsion according to the invention does not undergo any significant change of state and therefore of rheology before its implementation. The process according to the invention can be used to manufacture all types of cold bituminous mixes. Thus, the bituminous binder can be natural or synthetic. The binder is generally a hydrocarbon binder chosen from road bitumens, pure bitumens, fluxed or fluidized bitumens, bitumens modified by polymers, semi-blown bitumens, bitumens partially modified by blown bitumen, and all combinations of these bitumens. Concrete modified by polymers are defined by the standard
NF EN 125291 et le document "Guide Technique : emploi des liants modifiés, des bitumes spéciaux et des bitumes avec additifs en techniques routières" publié par le Laboratoire Central des Ponts etNF EN 125291 and the document "Technical Guide: use of modified binders, special bitumens and bitumens with additives in road techniques" published by the Central Laboratory of Bridges and
Chaussées LCPC ISSN 1151 - 1516 ISBN 2-7208-7140-4). Parmi les polymères utilisables pour modifier les bitumes, on peut citer les copolymères styrène-butadiène, les copolymères styrène- isoprène, les copolymères éthylène-acétate de vinyle (EVA), les terpolymères, tel que par exemple le composé d'une chaîne éthylénique avec des groupements fonctionnels d'acrylate de butyle et de glycidyl acrylate de méthyle qui assure une bonne stabilité au mélange bitume/polymère, les élastomères et les plastomères permettant une amélioration importante des résistances à la fissuration et à l'omiérage. Les granulats ont généralement une granulométrie choisie dans la gamme 0/Dmaχ, Dmaχ étant le diamètre maximal du granulat tel que défini selon la norme XP P 18-540 et allant en général de 4 à 31 ,5 mm. Les granulats utilisés dans le procédé selon l'invention peuvent être tous types de granulats habituellement utilisés pour la fabrication d'enrobés bitumineux, par exemple des matériaux naturels ou synthétiques tels que les laitiers, les scories, les mâchefers, les agrégats d'enrobés, et des mélanges en toutes proportions de ces matériaux. Comme cela est connu dans la technique, les agrégats d'enrobés sont des matériaux de recyclage provenant notamment du fraisage des revêtements bitumineux anciens. De façon avantageuse, l'enrobé bitumineux à froid tiédi selon l'invention comprend de 5 à 12 %, de préférence de 7 à 10 % en poids de liant par rapport au poids des granulats. L'enrobé bitumineux à froid tiédi obtenu par le procédé selon l'invention peut être ouvert (pourcentage de vide supérieur à 15% en volume), semi-dense (pourcentage de vide compris entre 10 et 15% en volume) ou dense (pourcentage de vide inférieur à 10% en volume). Cela est obtenu en faisant varier dans le mélange final la proportion de granulats 0/d, où 1< d < x, où x peut être égal à 2 mm, 4 mm ou 6,3 mm. L'enrobé bitumineux à froid tiédi obtenu par le procédé selon l'invention peut également être stockable ou non stockable. L'enrobé bitumineux à froid tiédi obtenu par le procédé selon l'invention peut être par exemple une grave-émulsion, un béton bitumineux à l'émulsion ou une grave bitume à froid. Comme expliqué précédemment, le procédé selon l'invention comprend, après l'enrobage, une ou plusieurs étapes d'élévation de la température de l'enrobé par chauffage de l'enrobé à une température de 30°C à 65°C. Généralement, après l'enrobage, l'enrobé obtenu est éventuellement stocké, puis transporté sur le lieu du chantier, si l'enrobage n'a pas été effectué sur le chantier, pour être mis en œuvre. L'enrobé est généralement mis en œuvre par une étape d'épandage sur la chaussée et une étape de compactage. Ainsi, l'enrobé à froid est chauffé avant Pépandage, c'est-à-dire après l'enrobage et avant ou après le transport sur le lieu d'application, s'il y a lieu, qu'il y ait ou non une phase de stockage, et/ou pendant l'épandage et/ou après l'épandage au cours du compactage. Au cours de l'épandage, le flux de l'enrobé est généralement compris entre 50 et 250 tonnes/heure. Le chauffage entraîne notamment l'augmentation de la température du liant et de l'eau présents dans l'enrobé. L'augmentation de la température du liant va considérablement modifier sa viscosité et donc influencer la qualité de l'enrobage et la maniabilité de l'enrobé. Avantageusement, le chauffage est effectué par un ou plusieurs moyens de chauffage choisis parmi un rayonnement infra-rouge, un rayonnement ultra-violet, des ondes micro-ondes, des ondes haute fréquence et une mise en contact de l'enrobé avec de l'air chaud. Pour tiédir l'enrobé à froid, selon le procédé de l'invention, sans nuire à la qualité du bitume de l'enrobé, on doit utiliser un matériel qui ne risque pas de provoquer une combustion en tout ou partie du bitume, tels que les tubes réchauffeurs d'agrégats. L'invention concerne encore un procédé de fabrication de revêtement routier par un enrobé bitumineux à froid obtenu par enrobage de granulats par un liant bitumineux en emulsion, les granulats pouvant être éventuellement préenrobés par un liant hydrocarboné, ledit procédé comprenant une ou plusieurs étapes d'élévation de la température de l'enrobé telles que définies précédemment. L'invention concerne enfin un dispositif de fabrication d'un enrobé bitumineux à froid pour revêtement routier, obtenu par enrobage de granulats par un liant bitumineux en emulsion, les granulats pouvant être éventuellement préenrobés par un liant hydrocarboné, ledit dispositif comprenant : - une trémie contenant les granulats avant enrobage, - un malaxeur, sur chantier ou en poste fixe, permettant l'enrobage des granulats par le liant, - une table d'application permettant l'application de l'enrobé sur la chaussée, - des éléments de transfert de l'enrobé vers la table d'application, ledit dispositif comprenant en outre un ou plusieurs moyens d'élévation de la température de l'enrobé à une température de 30°C à 65°C. La position du ou des moyens d'élévation de la température des granulats et du liant dépend du ou des moments auxquels sont effectués cette élévation de température au cours de la mise en œuvre de l'enrobé bitumineux à froid. Selon un premier mode de réalisation, un moyen d'élévation de la température de l'enrobé est positionné au niveau du malaxeur, le chauffage étant bien entendu effectué après la réalisation de l'enrobé à froid. Selon un deuxième mode de réalisation, un moyen d'élévation de la température de l'enrobé est positionné après le malaxeur. Selon un troisième mode de réalisation, un moyen d'élévation de la température de l'enrobé est positionné au niveau des éléments de transfert de l'enrobé. Selon un quatrième mode de réalisation, le dispositif selon l'invention comprend un moyen de répandage de l'enrobé et un moyen de compactage de l'enrobé, un moyen d'élévation de la température de l'enrobé étant positionné au niveau du moyen de compactage de l'enrobé ou entre le moyen de répandage et le moyen de compactage.Chaussées LCPC ISSN 1151 - 1516 ISBN 2-7208-7140-4). Among the polymers which can be used to modify bitumens, mention may be made of styrene-butadiene copolymers, styrene-isoprene copolymers, ethylene-vinyl acetate copolymers (EVA), terpolymers, such as for example the compound of an ethylenic chain with functional groups of butyl acrylate and methyl glycidyl acrylate which provides good stability to the bitumen / polymer mixture, the elastomers and plastomers allowing a significant improvement in the resistances to cracking and to homerage. The aggregates generally have a particle size chosen from the range 0 / D ma χ, D ma χ being the maximum diameter of the aggregate as defined according to standard XP P 18-540 and generally ranging from 4 to 31.5 mm. The aggregates used in the process according to the invention can be all types of aggregates usually used for the manufacture of bituminous mixes, for example natural or synthetic materials such as slag, slag, bottom ash, mixtures of mixtures, and mixtures of these materials in all proportions. As is known in the art, asphalt aggregates are recycling materials originating in particular from the milling of old bituminous coatings. Advantageously, the warm bituminous asphalt mix according to the invention comprises from 5 to 12%, preferably from 7 to 10% by weight of binder relative to the weight of the aggregates. The warm cold bituminous mix obtained by the process according to the invention can be opened (percentage of vacuum greater than 15% in volume), semi-dense (percentage of vacuum between 10 and 15% by volume) or dense (percentage of vacuum less than 10% by volume). This is obtained by varying in the final mixture the proportion of aggregates 0 / d, where 1 <d <x, where x can be equal to 2 mm, 4 mm or 6.3 mm. The warm cold bituminous mix obtained by the process according to the invention can also be storable or non-storable. The warm cold bituminous mix obtained by the process according to the invention can be, for example, a grave-emulsion, a bituminous concrete with an emulsion or a serious cold bitumen. As explained above, the method according to the invention comprises, after coating, one or more steps of raising the temperature of the mix by heating the mix to a temperature from 30 ° C to 65 ° C. Generally, after the coating, the asphalt obtained is possibly stored, then transported to the site of the site, if the coating has not been carried out on the site, to be implemented. The asphalt mix is generally implemented by a spreading step on the road and a compacting step. Thus, the cold mix is heated before spreading, that is to say after the coating and before or after transport to the place of application, if necessary, whether or not there is a storage phase, and / or during spreading and / or after spreading during compaction. During spreading, the flow of asphalt is generally between 50 and 250 tonnes / hour. Heating in particular leads to an increase in the temperature of the binder and of the water present in the mix. The increase in the temperature of the binder will considerably modify its viscosity and therefore influence the quality of the coating and the workability of the mix. Advantageously, the heating is carried out by one or more heating means chosen from infra-red radiation, ultra-violet radiation, microwave waves, high frequency waves and bringing the mix into contact with hot air. To cool the asphalt cold, according to the process of the invention, without harming the quality of the asphalt of the asphalt, one must use a material which does not not likely to cause combustion of all or part of the bitumen, such as aggregate heating tubes. The invention also relates to a process for manufacturing road surfaces with a cold bituminous mix obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said process comprising one or more stages of increase in the asphalt temperature as defined above. Finally, the invention relates to a device for manufacturing a cold bituminous mix for road surfaces, obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, said device comprising: - a hopper containing the aggregates before coating, - a mixer, on site or in a fixed position, allowing the coating of the aggregates with the binder, - an application table allowing the application of the mix on the pavement, - transfer elements from the mix to the application table, said device further comprising one or more means for raising the temperature of the mix to a temperature from 30 ° C. to 65 ° C. The position of the means or means for raising the temperature of the aggregates and of the binder depends on the point or times at which this temperature rise takes place during the implementation of the cold bituminous mix. According to a first embodiment, a means for raising the temperature of the mix is positioned at the level of the mixer, the heating being of course carried out after the cold mix has been produced. According to a second embodiment, a means for raising the temperature of the mix is positioned after the mixer. According to a third embodiment, a means for raising the temperature of the mix is positioned at the level of the transfer elements of the mix. According to a fourth embodiment, the device according to the invention comprises a means for spreading the mix and a means for compacting the mix, a means for raising the temperature of the mix being positioned at the level of the means. for compacting the mix or between the spreading means and the compacting means.
Les dispositifs de chauffage classiques, tels que les tambours sécheurs pour enrobage à chaud, ne permettent pas d'obtenir un tiédissement contrôlé à une température de 30 à 65°C. Comme indiqué précédemment un dispositif de chauffage convenant pour la mise en œuvre du procédé de l'invention est un tube réchauffeur d'agrégats.Conventional heating devices, such as drying drums for hot coating, do not make it possible to obtain controlled cooling at a temperature of 30 to 65 ° C. As previously indicated, a heating device suitable for implementing the method of the invention is an aggregate heating tube.
L'invention est illustrée par l'exemple suivant.The invention is illustrated by the following example.
ExempleExample
On teste les résistances de 3 enrobés bitumineux à froid de composition identique. Avant l'enrobage, les granulats et le liant bitumineux en emulsion sont conditionnés à la même température.We tested the resistance of 3 bituminous mixes cold with identical composition. Before coating, the aggregates and the bituminous binder in emulsion are conditioned at the same temperature.
Granulats : Les granulats utilisés sont des granulats ROL et POMPIER dont la granulométrie est la suivante : - classe 0/4 : 50% en poids - classe 4/6 : 10% en poids - classe 6/10 : 40% en poidsAggregates: The aggregates used are ROL and POMPIER aggregates, the particle size of which is as follows: - class 0/4: 50% by weight - class 4/6: 10% by weight - class 6/10: 40% by weight
Liant bitumineux : Le liant bitumineux représente 8% en poids du poids de l'enrobé. Le liant contient : - 65% en poids de bitume ESSO PJ 70/100 (soit une teneur en bitume dans l'enrobé de 5,2% en poids) - 8 kg/tonne de Polyram S - 8 kg/T d'acide chlorhydrique L'enrobage des granulats par le liant bitumineux est effectué à froid dans un malaxeur. La teneur initiale en eau dans les enrobés obtenus est de 6% en poids.Bituminous binder: The bituminous binder represents 8% by weight of the weight of the asphalt. The binder contains: - 65% by weight of bitumen ESSO PJ 70/100 (i.e. a bitumen content in the mix of 5.2% by weight) - 8 kg / tonne of Polyram S - 8 kg / T of acid hydrochloric The coating of the aggregates with the bituminous binder is carried out cold in a mixer. The initial water content in the coated materials obtained is 6% by weight.
Les enrobés sont portés à une température de 15°C (pas d'étape d'élévation de la température selon l'invention), 30CC (la température a été élevée selon l'invention ) ou éventuellement 50°C (la température a été élevée selon l'invention). Les enrobés sont soumis à des mesures de densité et de tenue à l'omiérage.The coated materials are brought to a temperature of 15 ° C (no temperature raising step according to the invention), 30 C C (the temperature was raised according to the invention) or possibly 50 ° C (the temperature was raised according to the invention). Asphalt mixes are subjected to density and odor resistance measures.
RésultatsResults
1) mesure de densité1) density measurement
La densité est mesurée au moyen d'une presse à cisaillement giratoire. On mesure le pourcentage de vide à 10, 60 ou 200 gir. selon la norme NF P 98-252. Les résultats sont donnés dans le tableau 2.The density is measured using a gyratory shear press. The percentage of vacuum is measured at 10, 60 or 200 gir. according to standard NF P 98-252. The results are given in Table 2.
Tableau 2Table 2
Ces résultats montrent que le pourcentage de vide diminue lorsque la température augmente. La diminution du pourcentage de vide correspond à une plus grande compacité et donc à une meilleure maniabilité de l'enrobé, en particulier sur site. 2) mesure de la résistance à l'omiérageThese results show that the percentage of vacuum decreases when the temperature increases. The decrease in the percentage of vacuum corresponds to a greater compactness and therefore to better handling of the asphalt, in particular on site. 2) measurement of the resistance to rusting
Le test de tenue à l'omiérage est réalisé selon la norme NF P 95-253-2.The homogeneity test is carried out according to standard NF P 95-253-2.
Les plaques sont conservées pendant 21 jours à 35°C. Les résultats sont donnés dans le tableau 3.Plates are stored for 21 days at 35 ° C. The results are given in Table 3.
Tableau 3Table 3
Ces résultats montrent que la tenue à l'omiérage augmente avec la température. Cela traduit une meilleure résistance mécanique de l'enrobé et moins de déformation potentielle du revêtement sous l'effet du trafic. These results show that the resistance to homogeneity increases with temperature. This translates into better mechanical resistance of the mix and less potential deformation of the coating under the effect of traffic.

Claims

REVENDICATIONS
1. Procédé de fabrication d'un enrobé bitumineux à froid pour revêtement routier, obtenu par enrobage de granulats par un liant bitumineux en emulsion, les granulats pouvant être éventuellement préenrobés par un liant hydrocarboné, caractérisé en ce qu'il comprend, après l'enrobage, et de préférence sans qu'il y ait eu rupture de l'émulsion de liant bitumineux, une ou plusieurs étapes de chauffage de l'enrobé pour obtenir une température de l'enrobé, au moment de sa mise en œuvre, de 30 à 65°C. 1. Process for the manufacture of a cold bituminous mix for road surfaces, obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, characterized in that it comprises, after coating, and preferably without breakage of the bituminous binder emulsion, one or more stages of heating the asphalt to obtain a temperature of the asphalt, at the time of its implementation, of 30 at 65 ° C.
2. Procédé selon la revendication 1, caractérisé en ce que la température est élevée de manière à obtenir une température au moment de la mise en œuvre de 30 à 60°C, de préférence 40 à 60°C et mieux de 50 à 55°C. 2. Method according to claim 1, characterized in that the temperature is raised so as to obtain a temperature at the time of implementation of 30 to 60 ° C, preferably 40 to 60 ° C and better still from 50 to 55 ° vs.
3. Procédé selon l'une quelconque des revendications 1 et 2 caractérisé en ce que l'enrobé à froid obtenu après l'enrobage est mis en œuvre par une étape d'épandage sur la chaussée et une étape de compactage, l'enrobé à froid étant chauffé avant et/ou pendant l'épandage, et/ou après l'épandage au cours du compactage. 3. Method according to any one of claims 1 and 2 characterized in that the cold mix obtained after the coating is implemented by a spreading step on the road and a compacting step, the coated cold being heated before and / or during spreading, and / or after spreading during compaction.
4. Procédé selon l'une quelconque des revendications précédentes caractérisé en ce que le chauffage est effectué par un ou plusieurs moyens de chauffage choisis parmi un rayonnement infrarouge, un rayonnement ultra-violet, des ondes micro-ondes, des ondes haute fréquence et une mise en contact de l'enrobé avec de l'air chaud. 4. Method according to any one of the preceding claims, characterized in that the heating is carried out by one or more heating means chosen from infrared radiation, ultra-violet radiation, microwave waves, high frequency waves and a bringing the mix into contact with hot air.
5. Procédé selon l'une quelconque des revendications précédentes caractérisé en ce que le liant est choisi parmi les bitumes routiers, les bitumes purs, les bitumes fluxés ou fluidifiés, les bitumes modifiés par des polymères, les bitumes semi -soufflés, les bitumes partiellement modifiés par du bitume soufflé, et toutes les combinaisons de ces bitumes. 5. Method according to any one of the preceding claims, characterized in that the binder is chosen from road bitumens, pure bitumens, fluxed or fluidized bitumens, bitumens modified by polymers, semi-blown bitumens, partially bitumens modified by blown bitumen, and all combinations of these bitumens.
6. Procédé selon l'une quelconque des revendications précédentes, caractérisée en ce que le liant bitumineux en emulsion est une emulsion cationique. 6. Method according to any one of the preceding claims, characterized in that the bituminous binder in emulsion is a cationic emulsion.
7. Procédé selon l'une quelconque des revendications précédentes caractérisé en ce que l'enrobé bitumineux à froid comprend de 5 à 12%, de préférence de 7 à 10% en poids de liant par rapport au poids des granulats.7. Method according to any one of the preceding claims, characterized in that the cold bituminous mix comprises from 5 to 12%, preferably from 7 to 10% by weight of binder relative to the weight of the aggregates.
8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les granulats sont constitués en tout ou en partie par des agrégats d'enrobé. 8. Method according to any one of claims 1 to 7, characterized in that the aggregates consist wholly or partly of asphalt aggregates.
9. Procédé de fabrication d'un revêtement routier par un enrobé bitumineux à froid obtenu par enrobage de granulats par un liant bitumineux en emulsion, les granulats pouvant être éventuellement préenrobés par un liant hydrocarboné, caractérisé en ce qu'il comprend une ou plusieurs étapes d'élévation de la température de l'enrobé telles que définies dans l'une quelconque des revendications 1 à 8. 9. Method for manufacturing a road surface with a cold bituminous mix obtained by coating aggregates with a bituminous binder in emulsion, the aggregates possibly being pre-coated with a hydrocarbon binder, characterized in that it comprises one or more stages of raising the temperature of the mix as defined in any one of claims 1 to 8.
10. Dispositif pour la mise en œuvre du procédé de fabrication d'un enrobé bitumineux à froid pour revêtement routier, selon l'une quelconque des revendications 1 à 9, ledit dispositif comprenant : - une trémie contenant les granulats avant enrobage, - un malaxeur, sur chantier ou en poste fixe, permettant l'enrobage des granulats par le liant, - une table d'application permettant l'application de l'enrobé sur la chaussée, - des éléments de transfert de l'enrobé vers la table d'application, caractérisé en ce que le dispositif comprend en outre un ou plusieurs moyens d'élévation de la température de l'enrobé au moment de sa mise en œuvre, à une température de 30 à 65°C. 10. Device for implementing the process for manufacturing a cold bituminous mix for road surfacing, according to any one of claims 1 to 9, said device comprising: - a hopper containing the aggregates before coating, - a mixer , on site or in a fixed position, allowing the coating of aggregates with the binder, - an application table allowing the application of the asphalt on the pavement, - elements for transferring the asphalt to the asphalt table application, characterized in that the device further comprises one or more means for raising the temperature of the coated material at the time of its implementation, to a temperature of 30 to 65 ° C.
11. Dispositif selon la revendication 10 caractérisé en ce qu'un moyen d'élévation de la température de l'enrobé est positionné au niveau du malaxeur. 11. Device according to claim 10 characterized in that a means for raising the temperature of the mix is positioned at the level of the mixer.
12. Dispositif selon la revendication 10 ou 11 caractérisé en ce qu'un moyen d'élévation de la température de l'enrobé est positionné après le malaxeur. 12. Device according to claim 10 or 11 characterized in that a means for raising the temperature of the mix is positioned after the mixer.
13. Dispositif selon l'une quelconque des revendications 10 à 12 caractérisé en ce qu'un moyen d'élévation de la température de l'enrobé est positionné au niveau des éléments de transfert de l'enrobé.13. Device according to any one of claims 10 to 12 characterized in that a means for raising the temperature of the mix is positioned at the level of the transfer elements of the mix.
14. Dispositif selon l'une quelconque des revendications 10 à 13 caractérisé en ce qu'il comprend un moyen de répandage de l'enrobé et un moyen de compactage de l'enrobé, un moyen d'élévation de la température de l'enrobé étant positionné au niveau de l'appareil de compactage de l'enrobé étant positionné au niveau, un moyen d'élévation ou entre le moyen de répandage et le moyen de compactage. 14. Device according to any one of claims 10 to 13 characterized in that it comprises a means for spreading the coated material and a means for compacting the mix, a means for raising the temperature of the mix being positioned at the level of the compacting apparatus for the mix being positioned at the level, a means for raising or between the means for spreading and compacting means.
15. Dispositif selon l'une quelconque des revendications 10 à 14, caractérisée en ce que le moyen d'élévation de la température de l'enrobé est un tube réchauffeur d'agrégats. 15. Device according to any one of claims 10 to 14, characterized in that the means for raising the temperature of the mix is an aggregate heating tube.
EP04816200A 2003-09-19 2004-09-17 Method for the preparation of a bituminous cold-mix Expired - Fee Related EP1668184B1 (en)

Applications Claiming Priority (2)

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FR0350579A FR2860011B1 (en) 2003-09-19 2003-09-19 PROCESS FOR MANUFACTURING COLD-BITUMINOUS ENROBE AND DEVICE
PCT/FR2004/050444 WO2005028756A2 (en) 2003-09-19 2004-09-17 Method for cold production of a bituminous coating and corresponding device

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EP1668184A2 true EP1668184A2 (en) 2006-06-14
EP1668184B1 EP1668184B1 (en) 2011-09-14

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AT (1) ATE524613T1 (en)
FR (1) FR2860011B1 (en)
WO (1) WO2005028756A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011151387A1 (en) 2010-06-04 2011-12-08 Eurovia Process for manufacturing cold bituminous mixes, cold bituminous mixes with controlled workability and use thereof for producing road pavements
WO2018055314A2 (en) 2016-09-26 2018-03-29 Eurovia Method for the high-speed embedding of a recyclable heat exchanger in land-based infrastructure
WO2021228895A1 (en) 2020-05-11 2021-11-18 Eurovia Cationic latex modified hydrocarbon binder emulsions and their use in the preparation of bituminous products
WO2022208035A1 (en) 2021-04-02 2022-10-06 Vinci Construction Bituminous binders offering increased resistance to chemical attack
WO2023135400A1 (en) 2022-01-17 2023-07-20 Vinci Construction Clear binder composition, and uses thereof for road surfacing and development surfacing
WO2023166264A1 (en) 2022-03-02 2023-09-07 Vinci Construction Method for producing a road surface layer based on a hydrocarbon cold mix

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FR2927086B1 (en) * 2008-02-01 2010-03-19 Eurovia USE OF AN EXOTHERMIC MIXTURE FOR THE MANUFACTURE OF A BITUMINOUS COAT.
FR2986006B1 (en) * 2012-01-23 2015-10-16 Colas Sa METHODS OF MANUFACTURING HYDROCARBON ENVELOPES COMPRISING A SEQUENCE COATING

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GB2291087B (en) * 1994-07-09 1997-08-06 Adrian Holt A continuous mobile production and laying process for thin macadam surfacing
FR2732239B1 (en) * 1995-03-29 1997-06-06 Muntzer Emile Jacques VERSATILE HOT AND COLD BITUMINOUS COATINGS
AT4686U1 (en) * 2000-07-27 2001-10-25 Vialit Gmbh Oesterr MIXING DEVICE FOR COLD MATERIAL

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005028756A2 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011151387A1 (en) 2010-06-04 2011-12-08 Eurovia Process for manufacturing cold bituminous mixes, cold bituminous mixes with controlled workability and use thereof for producing road pavements
US8926741B2 (en) 2010-06-04 2015-01-06 Eurovia Process for manufacturing cold bituminous mixes, cold bituminous mixes with controlled workability and use thereof for producing road pavements
WO2018055314A2 (en) 2016-09-26 2018-03-29 Eurovia Method for the high-speed embedding of a recyclable heat exchanger in land-based infrastructure
WO2021228895A1 (en) 2020-05-11 2021-11-18 Eurovia Cationic latex modified hydrocarbon binder emulsions and their use in the preparation of bituminous products
WO2022208035A1 (en) 2021-04-02 2022-10-06 Vinci Construction Bituminous binders offering increased resistance to chemical attack
FR3121444A1 (en) 2021-04-02 2022-10-07 Eurovia Bituminous binders offering increased resistance to chemical attack
WO2023135400A1 (en) 2022-01-17 2023-07-20 Vinci Construction Clear binder composition, and uses thereof for road surfacing and development surfacing
FR3131920A1 (en) 2022-01-17 2023-07-21 Eurovia Composition of clear binder and its applications for road surfaces and landscaping
WO2023166264A1 (en) 2022-03-02 2023-09-07 Vinci Construction Method for producing a road surface layer based on a hydrocarbon cold mix
FR3133202A1 (en) 2022-03-02 2023-09-08 Eurovia Process for manufacturing cold hydrocarbon mixes and cold hydrocarbon mixes with rapid cohesion build-up

Also Published As

Publication number Publication date
EP1668184B1 (en) 2011-09-14
ATE524613T1 (en) 2011-09-15
WO2005028756A2 (en) 2005-03-31
FR2860011B1 (en) 2006-09-15
FR2860011A1 (en) 2005-03-25
WO2005028756A3 (en) 2005-06-09

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