EP1027386A1 - Composition and method for producing a road surface course - Google Patents

Composition and method for producing a road surface course

Info

Publication number
EP1027386A1
EP1027386A1 EP99923682A EP99923682A EP1027386A1 EP 1027386 A1 EP1027386 A1 EP 1027386A1 EP 99923682 A EP99923682 A EP 99923682A EP 99923682 A EP99923682 A EP 99923682A EP 1027386 A1 EP1027386 A1 EP 1027386A1
Authority
EP
European Patent Office
Prior art keywords
gravel
bitumen
tread
sand
lacquered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99923682A
Other languages
German (de)
French (fr)
Inventor
Yves Morlot
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Colas SA filed Critical Colas SA
Publication of EP1027386A1 publication Critical patent/EP1027386A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • C08L95/005—Aqueous compositions, e.g. emulsions
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2495/00—Bituminous materials, e.g. asphalt, tar or pitch

Definitions

  • the present invention relates to a composition and a method for producing a wearing course of a road as well as the corresponding wearing course. It has applications in the construction and maintenance industry of traffic pavements.
  • a road surface layer must have a certain number of characteristics, in particular, it must ensure the tightness of the entire body of the roadway, the longitudinal and transverse uniformity, the flatness necessary for the stability of automobiles and a grip. sufficient for vehicle braking. As far as possible, it must also have a low noise level during tire / road contact. It is also desirable after its implementation by construction or during maintenance, that there is very little discharge of gravel in order to avoid breakage of the windshield.
  • road surface layers having these characteristics are produced using hot mixes comprising aggregates bonded by bitumen.
  • These aggregates are preferably 4/6 or 6/10 gravel, possibly associated with 0/2 sand, these numerical values correspond to the sizes of the aggregates.
  • These mixes are used both in high traffic pavements and in low or moderate traffic pavements corresponding to approximately 5,000 vehicles per day or less.
  • the economic and mechanical constraints are not the same as in the case of heavy traffic.
  • the investment possibilities are often reduced for “small” roads compared to the main traffic axes.
  • the wear and the stresses of the wearing course are reduced.
  • due to the preferential use of 4/6 or 6/10 gravel in the treads aggregates of other sizes are often found to be downgraded or unsold and are therefore offered at reduced prices.
  • the object of the invention is therefore to propose a composition for producing a tread for a roadway with low or moderate traffic which has the characteristics mentioned above while being cost-effective. reduced. However, it can also be used for roads with higher traffic but whose vehicles are less aggressive for the surface, for example bikes, motorcycles or light carts, etc. It can be used in high deflection pavements greater than 100/100 mm as well as in low deflection pavements.
  • the invention consists of a composition of lacquered aggregates, said composition being subsequently used in the production of a tread.
  • the aggregates are gravel 1/2 to 2/8 and preferably only 2/4 ” to
  • the gravel is coated with a bituminous binder.
  • bituminous binder is an emulsion of bitumen.
  • the bitumen of the emulsion has a penetration of 30 to 300.
  • the proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%.
  • composition of lacquered aggregates can be stored up to several months before its implementation.
  • composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine.
  • the tread is intended for a road surface with low or moderate traffic corresponding to approximately 5,000 vehicles per day or less.
  • the invention also consists of a method of producing a tread on a support in which the following steps are implemented:
  • a bonding layer is optionally produced on the support depending on the state of the support
  • composition of lacquered aggregates is spread directly on the support or via the possible bonding layer
  • This invention can also have the following technical characteristics, taken individually or in any technically possible combination: - the aggregates are gravel 1/2 to 2/8 and preferably 2/4 to
  • the gravel is coated with a bituminous binder.
  • bituminous binder is an emulsion of bitumen.
  • bitumen of the emulsion has a penetration of 30 to 300.
  • lacquering is carried out cold. .
  • the proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%.
  • the composition of lacquered aggregates can be stored up to several months before its implementation.
  • composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine.
  • the tread is intended for a road surface with low or moderate traffic corresponding to approximately 5000 vehicles per day or less.
  • the dosage of the composition of lacquered aggregates is between 10 and 180 kg / m 2 of tread and preferably between 30 and 60 kg / m 2 for a thickness between 10 and 100 mm.
  • the sand is a sand 0/1 to 0/4 and preferably 0/2 to 0/4.
  • the cleanliness of the sand can be limited to an equivalent of sand greater than or equal to 40.
  • the dosage of sand is between 1 and 20 kg / m 2 of tread and preferably between 3 and 5 kg / m 2 .
  • bitumen emulsion with rupture and controlled viscosity is dosed to obtain a residual dosage of bitumen between 100 and 5000 g / m 2 of tread and preferably between 400 and 1000 g / m 2 .
  • the sand can be watered to help its migration between the voids in the composition of lacquered aggregates.
  • the invention also consists of a tread, comprising:. - A composition of lacquered gravel deposited on a support directly or via a bonding layer, the lacquering of gravel being obtained by a bituminous binder in the form of a bitumen emulsion.
  • the aggregates are gravel 1/2 to 2/8 and preferably 2/4 to 2/6.
  • the gravel is coated with a bituminous binder.
  • bituminous binder is an emulsion of bitumen.
  • the bitumen of the emulsion has a penetration of 30 to 300.
  • the proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%.
  • composition of lacquered aggregates can be stored up to several months before its implementation.
  • composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine.
  • the dosage of the composition of lacquered aggregates is between 10 and 180 kg / m 2 of tread and preferably between 30 and
  • the sand is a sand 0/1 to 0/4 and preferably 0/2 to 0/4.
  • the cleanliness of the sand can be limited to an equivalent of sand greater than or equal to 40.
  • the dosage of sand is between 1 and 20 kg / m 2 of tread and preferably between 3 and 5 kg / m 2 .
  • bitumen emulsion with rupture and controlled viscosity is dosed to obtain a residual dosage of bitumen between 100 and 5000 g / m 2 of tread and preferably between 400 and 1000 g / m 2 .
  • the sand can be watered to help its migration between the voids in the composition of lacquered aggregates.
  • the roughness measured by the so-called “sand height” method on a tread gives a result between HSv 0.5 and 1 mm.
  • the tread is intended for light or moderate traffic pavement corresponding to approximately 5,000 vehicles per day or less.
  • the tread according to the invention includes all the criteria for the acceptance of wearing courses for roads with low and moderate traffic, the stiffness modulus of this complex is equal to or less than 3000 Mpa.
  • the uniformity and the flatness are obtained by the implementation of the lacquered aggregates, the sealing and the roughness are obtained by the filling of voids and the sweeping of the sand, the cohesion of the whole prevents the rejection of gravel and a low noise level is obtained by using 2/4 to 2/6 gravel preferably. These characteristics are obtained at a reduced cost by using decommissioned or unsold quarry materials.
  • a composition of lacquered aggregates is produced, 4/6 chippings are introduced into a device also receiving a bitumen emulsion.
  • the emulsion is brought into contact with the gravel and agitation is ensured in order to distribute the emulsion uniformly over the gravel so that the coating is uniform.
  • This lacquering is carried out cold.
  • the composition of lacquered gravel is sent to a storage area. This storage can last from several days to several months. On the road construction site, support is required to stabilize the future tread.
  • this support has a low attachment capacity to the composition of lacquered gravel
  • a bonding layer must be produced on the support before spreading the composition of lacquered gravel.
  • the lacquered gravel is transported from its storage area to the road construction site where it is spread on the support using a grader.
  • lacquered gravel composition about 40 kg per m 2 of tread for an average thickness of 50 mm.
  • a bitumen emulsion with rupture and viscosity controlled according to the outside temperature and the humidity as well as 0/2 quarry sand are spread on the layer of composition of lacquered gravel.
  • sand is used at the rate of approximately 4 kg / m 2 of tread.
  • the dosage of the bitumen emulsion will be chosen to obtain a residual bitumen rate of approximately 500 g / m 2 of tread.
  • the assembly is then cylinder and a scan carried out.
  • a tread made according to these characteristics is waterproof, measurements made at the site permeameter have given permeability values between 2 to 15 ⁇ 10 -4 .
  • roughness measurements by the so-called “sand height” method have given results between HSv 0.5 and 1 mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Machines (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention concerns a composition and a method for producing a road surface course for roadways with little or moderate traffic corresponding to not more than about 5000 vehicles per day. The composition is based on black japanned aggregates, the aggregates being 2/4 to 2/6 chippings and the lacquering being obtained by a bitumen emulsion. When the surface course is being produced, sand and a bitumen emulsion with controlled fracture and viscosity are spread over the black japanned aggregate composition surface, the whole being then compacted. The invention also concerns a corresponding surface course.

Description

COMPOSITION ET PROCEDE DE REALISATION D'UNE COUCHE DE ROULEMENT D'UNE ROUTE COMPOSITION AND METHOD FOR PRODUCING A LAYER OF A ROAD
La présente invention concerne une composition et un procédé de réalisation d'une couche de roulement d'une route ainsi que la couche de roulement correspondant. Elle a des applications dans l'industrie de construction et d'entretien des chaussées de circulation. Une couche de roulement de chaussées doit présenter un certain nombre de caractéristiques, en particulier, elle doit assurer l'étanchéité de l'ensemble du corps de chaussée, l'uni longitudinal et transversal, la planéité nécessaire à la stabilité des automobiles et une adhérence suffisante pour le freinage des véhicules. Dans la mesure du possible, elle doit aussi avoir un faible niveau sonore lors du contact pneumatique/chaussée. II est aussi souhaitable après sa mise en oeuvre par construction ou lors d'un entretien, qu'il y est très peu de rejets de gravillons afin d'éviter les bris de pare brise.The present invention relates to a composition and a method for producing a wearing course of a road as well as the corresponding wearing course. It has applications in the construction and maintenance industry of traffic pavements. A road surface layer must have a certain number of characteristics, in particular, it must ensure the tightness of the entire body of the roadway, the longitudinal and transverse uniformity, the flatness necessary for the stability of automobiles and a grip. sufficient for vehicle braking. As far as possible, it must also have a low noise level during tire / road contact. It is also desirable after its implementation by construction or during maintenance, that there is very little discharge of gravel in order to avoid breakage of the windshield.
Classiquement, les couches de roulement de chaussées présentant ces caractéristiques sont réalisées grâce à des enrobés à chaud comprenant des granulats liés par du bitume. Ces granulats sont préférentiellement des gravillons 4/6 ou 6/10, éventuellement associés à du sable 0/2, ces valeurs numériques correspondent aux tailles des granulats. Ces enrobés sont aussi bien utilisés dans des chaussés à fort trafic que dans des chaussées à trafic faible ou modéré correspondant à environ 5 000 véhicules par jour ou moins. Or, dans ce dernier cas, les contraintes économiques et mécaniques ne sont pas les mêmes que dans les cas de forts trafics. En effet, les possibilités d'investissement sont souvent réduites pour les « petites » routes par rapport aux axes principaux de circulation. Par ailleurs, du fait du trafic réduit, l'usure et les sollicitations de la couche de roulement sont moindres. Par ailleurs, du fait de l'utilisation préférentielle de gravillons 4/6 ou 6/10 dans les bandes de roulement, les granulats de taille autre se retrouvent souvent déclassés ou invendus et sont donc proposés à des prix réduits.Conventionally, road surface layers having these characteristics are produced using hot mixes comprising aggregates bonded by bitumen. These aggregates are preferably 4/6 or 6/10 gravel, possibly associated with 0/2 sand, these numerical values correspond to the sizes of the aggregates. These mixes are used both in high traffic pavements and in low or moderate traffic pavements corresponding to approximately 5,000 vehicles per day or less. However, in the latter case, the economic and mechanical constraints are not the same as in the case of heavy traffic. In fact, the investment possibilities are often reduced for “small” roads compared to the main traffic axes. In addition, due to the reduced traffic, the wear and the stresses of the wearing course are reduced. Furthermore, due to the preferential use of 4/6 or 6/10 gravel in the treads, aggregates of other sizes are often found to be downgraded or unsold and are therefore offered at reduced prices.
Le but de l'invention est donc de proposer une composition pour la réalisation d'une bande de roulement pour chaussée à trafic faible ou modéré qui possède les caractéristiques précédemment citées tout en étant d'un coût réduit. Cependant elle peut aussi être utilisée pour des chaussées à plus fort trafic mais dont les véhicules sont moins agressifs pour le revêtement, par exemple vélos, motos ou chariots légers, etc. Elle peut aussi bien être utilisée dans des chaussées à déflexion élevée, supérieure à 100/100 mm que dans les chaussées à faible déflexion.The object of the invention is therefore to propose a composition for producing a tread for a roadway with low or moderate traffic which has the characteristics mentioned above while being cost-effective. reduced. However, it can also be used for roads with higher traffic but whose vehicles are less aggressive for the surface, for example bikes, motorcycles or light carts, etc. It can be used in high deflection pavements greater than 100/100 mm as well as in low deflection pavements.
Pour cela, l'invention consiste en une composition de granulats laqués, ladite composition étant ultérieurement utilisée dans la réalisation d'une bande de roulement.For this, the invention consists of a composition of lacquered aggregates, said composition being subsequently used in the production of a tread.
Selon l'invention : - les granulats sont des gravillons 1/2 à 2/8 et préférentiel lement 2/4» àAccording to the invention: - the aggregates are gravel 1/2 to 2/8 and preferably only 2/4 ” to
2/6.2/6.
- les gravillons sont laqués par un liant bitumineux.- the gravel is coated with a bituminous binder.
- le liant bitumineux est une emulsion de bitume.- the bituminous binder is an emulsion of bitumen.
Cette invention peut également présenter les caractéristiques techniques suivantes prises isolément ou selon toutes les combinaisons techniquement possibles et présentant chacune des avantages particuliers :This invention can also have the following technical characteristics taken in isolation or in all technically possible combinations and each presenting particular advantages:
- le bitume de l'émulsion a une pénétration de 30 à 300.- the bitumen of the emulsion has a penetration of 30 to 300.
- le laquage est effectué à froid.- the lacquering is carried out cold.
- le laquage est effectué à chaud. - la proportion de bitume résiduel dans la composition de granulats laqués est comprise entre 0,5 % et 10 % et préférentiellement entre 1 % et 4 %.- the lacquering is carried out hot. - The proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%.
- la composition de granulats laqués peut être stockés jusqu'à plusieurs mois avant sa mise en oeuvre. - la composition de granulats laqués peut être mise en oeuvre au finisseur ou éventuellement à la niveleuse ou à l'automoteur pour enrobés, coulées à froid ou par tout autre engin d'application.- the composition of lacquered aggregates can be stored up to several months before its implementation. - the composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine.
La bande de roulement est destinée à une chaussée à trafic faible ou modéré correspondant à environ 5 000 véhicules par jour ou moins. L'invention consiste aussi en un procédé de réalisation d'une bande de roulement sur un support dans lequel les étapes suivantes sont mises en oeuvre :The tread is intended for a road surface with low or moderate traffic corresponding to approximately 5,000 vehicles per day or less. The invention also consists of a method of producing a tread on a support in which the following steps are implemented:
- une couche d'accrochage est éventuellement réalisée sur le support en fonction de l'état du support,- a bonding layer is optionally produced on the support depending on the state of the support,
- une composition de granulats laqués est répandue directement sur le support ou par l'intermédiaire de l'éventuelle couche d'accrochage,- a composition of lacquered aggregates is spread directly on the support or via the possible bonding layer,
- une emulsion de bitume à rupture et viscosité contrôlée est répandue,- a bitumen emulsion with rupture and controlled viscosity is widespread,
- du sable est répandu, - l'ensemble est compacté ou cylindre,- sand is spilled, - the whole is compacted or cylinder,
- un balayage est effectué.- a scan is performed.
Cette invention peut également présenter les caractéristiques techniques suivantes prises isolément ou selon toutes les combinaisons techniquement possibles : - les granulats sont des gravillons 1/2 à 2/8 et préférentiellement 2/4 àThis invention can also have the following technical characteristics, taken individually or in any technically possible combination: - the aggregates are gravel 1/2 to 2/8 and preferably 2/4 to
2/6.2/6.
- les gravillons sont laqués par un liant bitumineux.- the gravel is coated with a bituminous binder.
- le liant bitumineux est une emulsion de bitume.- the bituminous binder is an emulsion of bitumen.
- le bitume de l'émulsion a une pénétration de 30 à 300. - le laquage est effectué à froid. .- the bitumen of the emulsion has a penetration of 30 to 300. - the lacquering is carried out cold. .
- le laquage est effectué à chaud.- the lacquering is carried out hot.
- la proportion de bitume résiduel dans la composition de granulats laqués est comprise entre 0,5 % et 10 % et préférentiellement entre 1 % et 4 %. - la composition de granulats laqués peut être stockée jusqu'à plusieurs mois avant sa mise en oeuvre.- The proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%. - the composition of lacquered aggregates can be stored up to several months before its implementation.
- la composition de granulats laqués peut être mise en oeuvre au finisseur ou éventuellement à la niveleuse ou à l'automoteur pour enrobés, coulées à froid ou par tout autre engin d'application. La bande de roulement est destinée à une chaussée à trafic faible ou modéré correspondant à environ 5000 véhicules par jour ou moins.- the composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine. The tread is intended for a road surface with low or moderate traffic corresponding to approximately 5000 vehicles per day or less.
- le dosage de la composition de granulats laqués est compris entre 10 et 180 kg/m2 de bande de roulement et préférentiellement compris entre 30 et 60 kg/m2 pour une épaisseur comprise entre 10 et 100 mm.- the dosage of the composition of lacquered aggregates is between 10 and 180 kg / m 2 of tread and preferably between 30 and 60 kg / m 2 for a thickness between 10 and 100 mm.
- le sable est un sable de carrière.- sand is quarry sand.
- le sable est un sable 0/1 à 0/4 et préférentiellement 0/2 à 0/4.- the sand is a sand 0/1 to 0/4 and preferably 0/2 to 0/4.
- la propreté du sable peut être limitée à un équivalent de sable supérieur ou égal à 40. - le dosage du sable est compris entre 1 et 20 kg/m2 de bande de roulement et préférentiellement entre 3 et 5 kg/m2.- the cleanliness of the sand can be limited to an equivalent of sand greater than or equal to 40. - the dosage of sand is between 1 and 20 kg / m 2 of tread and preferably between 3 and 5 kg / m 2 .
- l'émulsion de bitume à rupture et viscosité contrôlée est dosée pour obtenir un dosage résiduel en bitume compris entre 100 et 5000 g/m2 de bande de roulement et préférentiellement entre 400 et 1000 g/m2. - le sable peut être arrosé pour aider à sa migration entre les vides de la composition de granulats laqués.- the bitumen emulsion with rupture and controlled viscosity is dosed to obtain a residual dosage of bitumen between 100 and 5000 g / m 2 of tread and preferably between 400 and 1000 g / m 2 . - the sand can be watered to help its migration between the voids in the composition of lacquered aggregates.
- la rugosité mesurée par la méthode dite « hauteur au sable » sur une bande de roulement donne un résultat compris entre HSv 0,5 et 1 mm.- the roughness measured by the so-called “sand height” method on a tread gives a result between HSv 0.5 and 1 mm.
L'invention consiste encore en une bande de roulement, comportant : . - une composition de gravillons laqués déposés sur un support directement ou par l'intermédiaire d'une couche d'accrochage, le laquage des gravillons étant obtenu par un liant bitumineux sous forme d'une emulsion de bitume.The invention also consists of a tread, comprising:. - A composition of lacquered gravel deposited on a support directly or via a bonding layer, the lacquering of gravel being obtained by a bituminous binder in the form of a bitumen emulsion.
- du sable, - une emulsion de bitume à rupture et viscosité contrôlée.- sand, - a bitumen emulsion with rupture and controlled viscosity.
Cette invention peut également présenter les caractéristiques techniques suivantes prises isolément ou selon toutes les combinaisons techniquement possibles :This invention may also have the following technical characteristics taken in isolation or in any technically possible combination:
- les granulats sont des gravillons 1/2 à 2/8 et préférentiellement 2/4 à 2/6. - les gravillons sont laqués par un liant bitumineux.- the aggregates are gravel 1/2 to 2/8 and preferably 2/4 to 2/6. - the gravel is coated with a bituminous binder.
- le liant bitumineux est une emulsion de bitume.- the bituminous binder is an emulsion of bitumen.
- le bitume de l'émulsion a une pénétration de 30 à 300.- the bitumen of the emulsion has a penetration of 30 to 300.
- le laquage est effectué à froid. - le laquage est effectué à chaud.- the lacquering is carried out cold. - the lacquering is carried out hot.
- la proportion de bitume résiduel dans la composition de granulats laqués est comprise entre 0,5 % et 10 % et préférentiellement entre 1 % et 4 %.- The proportion of residual bitumen in the composition of lacquered aggregates is between 0.5% and 10% and preferably between 1% and 4%.
- la composition de granulats laqués peut être stockée jusqu'à plusieurs mois avant sa mise en oeuvre.- the composition of lacquered aggregates can be stored up to several months before its implementation.
- la composition de granulats laqués peut être mise en oeuvre au finisseur ou éventuellement à la niveleuse ou à l'automoteur pour enrobés, coulées à froid ou par tout autre engin d'application.- the composition of lacquered aggregates can be used with the paver or possibly with a grader or self-propelled for asphalt, cold-cast or by any other application machine.
- le dosage de la composition de granulats laqués est compris entre 10 et 180 kg/m2 de bande de roulement et préférentiellement compris entre 30 et- the dosage of the composition of lacquered aggregates is between 10 and 180 kg / m 2 of tread and preferably between 30 and
60 kg/m2 pour une épaisseur comprise entre 10 et 100 mm.60 kg / m 2 for a thickness between 10 and 100 mm.
- le sable est un sable de carrière.- sand is quarry sand.
- le sable est un sable 0/1 à 0/4 et préférentiellement 0/2 à 0/4.- the sand is a sand 0/1 to 0/4 and preferably 0/2 to 0/4.
- la propreté du sable peut être limitée à un équivalent de sable supérieur ou égal à 40.- the cleanliness of the sand can be limited to an equivalent of sand greater than or equal to 40.
- le dosage du sable est compris entre 1 et 20 kg/m2 de bande de roulement et préférentiellement entre 3 et 5 kg/m2.- the dosage of sand is between 1 and 20 kg / m 2 of tread and preferably between 3 and 5 kg / m 2 .
- l'émulsion de bitume à rupture et viscosité contrôlée est dosée pour obtenir un dosage résiduel en bitume compris entre 100 et 5000 g/m2 de bande de roulement et préférentiellement entre 400 et 1000 g/m2.- the bitumen emulsion with rupture and controlled viscosity is dosed to obtain a residual dosage of bitumen between 100 and 5000 g / m 2 of tread and preferably between 400 and 1000 g / m 2 .
- le sable peut être arrosé pour aider à sa migration entre les vides de la composition de granulats laqués.- the sand can be watered to help its migration between the voids in the composition of lacquered aggregates.
- la rugosité mesurée par la méthode dite « hauteur au sable » sur une bande de roulement donne un résultat compris entre HSv 0,5 et 1 mm. La bande de roulement est destinée à une chaussée à trafic faible ou modéré correspondant à environ 5 000 véhicules par jour ou moins.- the roughness measured by the so-called “sand height” method on a tread gives a result between HSv 0.5 and 1 mm. The tread is intended for light or moderate traffic pavement corresponding to approximately 5,000 vehicles per day or less.
La bande de roulement selon l'invention comporte tous les critères d'acceptation des couches de roulement pour chaussées à trafic faible et modéré, le module de rigidité de ce complexe est égal ou inférieur à 3 000 Mpa. L'uni et la planéité sont obtenus par la mise en oeuvre des granulats laqués, l'étanchéité et la rugosité sont obtenues par l'obturation des vides et le balayage du sable, la cohésion de l'ensemble empêche le rejet des gravillons et un faible niveau sonore est obtenu par l'utilisation de gravillons 2/4 à 2/6 préférentiellement. Ces caractéristiques étant obtenues à un coût réduit en utilisant des matériaux de carrière déclassés ou invendus.The tread according to the invention includes all the criteria for the acceptance of wearing courses for roads with low and moderate traffic, the stiffness modulus of this complex is equal to or less than 3000 Mpa. The uniformity and the flatness are obtained by the implementation of the lacquered aggregates, the sealing and the roughness are obtained by the filling of voids and the sweeping of the sand, the cohesion of the whole prevents the rejection of gravel and a low noise level is obtained by using 2/4 to 2/6 gravel preferably. These characteristics are obtained at a reduced cost by using decommissioned or unsold quarry materials.
L'invention sera mieux comprise par la description d'un exemple de mise en oeuvre et de réalisation d'une bande de roulement pour chaussées à trafic faible ou modéré. Dans un premier temps, une composition de granulats laqués est réalisée, des gravillons 4/6 sont introduits dans un dispositif recevant par ailleurs une emulsion de bitume. Dans ce dispositif, l'émulsion est mise au contact des gravillons et une agitation assurée afin de répartir uniformément l'émulsion sur les gravillons afin que le laquage soit uniforme. Ce laquage s'effectue à froid. En sortie du dispositif, la composition de gravillons laqués est envoyée sur une aire de stockage. Ce stockage peut durer de plusieurs jours à plusieurs mois. Sur le chantier routier, un support nécessaire à la stabilisation de la future bande de roulement est réalisé. Dans le cas où ce support présente une faible capacité d'accrochage à la composition de gravillons laqués, une couche d'accrochage doit être réalisée sur le support avant l'étalement de la composition de gravillons laqués. Les gravillons laqués sont transportés de leur zone de stockage vers le chantier routier où ils sont répandus sur le support grâce à une niveleuse.The invention will be better understood from the description of an example of implementation and embodiment of a tread for roads with low or moderate traffic. Firstly, a composition of lacquered aggregates is produced, 4/6 chippings are introduced into a device also receiving a bitumen emulsion. In this device, the emulsion is brought into contact with the gravel and agitation is ensured in order to distribute the emulsion uniformly over the gravel so that the coating is uniform. This lacquering is carried out cold. On leaving the device, the composition of lacquered gravel is sent to a storage area. This storage can last from several days to several months. On the road construction site, support is required to stabilize the future tread. In the case where this support has a low attachment capacity to the composition of lacquered gravel, a bonding layer must be produced on the support before spreading the composition of lacquered gravel. The lacquered gravel is transported from its storage area to the road construction site where it is spread on the support using a grader.
Dans cet exemple, on utilise environ 40 kg de composition de gravillons laqués par m2 de bande de roulement pour une épaisseur moyenne de 50 mm. Une emulsion de bitume à rupture et viscosité contrôlée en fonction de la température extérieure et de l'hygrométrie ainsi que du sable de carrière 0/2 sont répandus sur la couche de composition de gravillons laqués.In this example, about 40 kg of lacquered gravel composition is used per m 2 of tread for an average thickness of 50 mm. A bitumen emulsion with rupture and viscosity controlled according to the outside temperature and the humidity as well as 0/2 quarry sand are spread on the layer of composition of lacquered gravel.
Dans cet exemple, on utilise du sable à raison d'environ 4 kg/m2 de bande de roulement. Le dosage de l'émulsion de bitume sera choisi pour obtenir un taux de bitume résiduel d'environ 500 g/m2 de bande de roulement. L'ensemble est ensuite cylindre et un balayage effectué. Une bande de roulement réalisée selon ces caractéristiques est étanche, des mesures réalisées au perméamètre de chantier ont donné des valeurs de perméabilité comprises entre 2 à 15 10"4. Par ailleurs, les mesures de rugosité par la méthode dite « hauteur au sable » ont donnés des résultats compris entre HSv 0,5 et 1 mm.In this example, sand is used at the rate of approximately 4 kg / m 2 of tread. The dosage of the bitumen emulsion will be chosen to obtain a residual bitumen rate of approximately 500 g / m 2 of tread. The assembly is then cylinder and a scan carried out. A tread made according to these characteristics is waterproof, measurements made at the site permeameter have given permeability values between 2 to 15 × 10 -4 . In addition, roughness measurements by the so-called “sand height” method have given results between HSv 0.5 and 1 mm.
L'exemple de réalisation qui vient d'être décrit est donné à titre purement indicatif et ne saurait limiter la portée de l'invention. The embodiment which has just been described is given for information only and should not limit the scope of the invention.

Claims

REVENDICATIONS
1. Composition pour la réalisation d'une bande de roulement d'une route comportant un liant et des granulats, caractérisée en ce que : - le liant est une emulsion de bitume,1. Composition for producing a tread for a road comprising a binder and aggregates, characterized in that: - the binder is an emulsion of bitumen,
- les granulats sont des gravillons 1/2 à 2/8 et préférentiellement des gravillons 2/4 à 2/6,- the aggregates are gravel 1/2 to 2/8 and preferably gravel 2/4 to 2/6,
- les gravillons étant laqués par le liant, le taux résiduel du bitume des gravillons laqués se situant entre 0,5 % et 10 % et préférentiellement entre 1 % et 4 % avec un bitume de pénétration 30 à 300.- the gravel being lacquered with the binder, the residual bitumen content of the lacquered gravel being between 0.5% and 10% and preferably between 1% and 4% with a penetration bitumen 30 to 300.
2. Composition selon la revendication 1 , caractérisée en ce que le laquage est obtenu à froid.2. Composition according to claim 1, characterized in that the lacquering is obtained cold.
3. Procédé de réalisation d'une bande de roulement d'une route caractérisé en ce que : - des gravillons laqués sont déposés sur un support routier pour former une couche, une couche d'accrochage pouvant éventuellement être intercalée entre ledit support et lesdits gravillons laqués, lesdits gravillons étant des gravillons 1/2 à 2/8 et préférentiellement 2/4 à 2/6, le laquage étant obtenu par une emulsion de bitume, le taux résiduel de bitume se situant entre 0,5 % et 10 % et préférentiellement entre 1 % et 4 % pour un bitume de pénétration 30 à 300.3. Method for producing a tread for a road, characterized in that: - lacquered gravel is deposited on a road support to form a layer, a bonding layer possibly being able to be interposed between said support and said gravel lacquered, said chippings being chippings 1/2 to 2/8 and preferably 2/4 to 2/6, the lacquering being obtained by an emulsion of bitumen, the residual bitumen content being between 0.5% and 10% and preferably between 1% and 4% for a bitumen of penetration 30 to 300.
4. Procédé selon la revendication 3, caractérisé en ce que les gravillons laqués sont utilisés à raison de 10 à 100 kg/m2 de bande de roulement et préférentiellement entre 30 et 60 kg/m2, pour une épaisseur de couche pouvant varier entre 10 et 100 mm.4. Method according to claim 3, characterized in that the lacquered gravel are used at a rate of 10 to 100 kg / m 2 of tread and preferably between 30 and 60 kg / m 2 , for a layer thickness which can vary between 10 and 100 mm.
5. Procédé selon la revendication 3 ou 4 caractérisé en ce qu'une emulsion de bitume à viscosité contrôlée et du sable sont répandus sur la couche de gravillons laqués et que l'on compacte ou cylindre puis balaye la bande de roulement. 5. Method according to claim 3 or 4 characterized in that an emulsion of bitumen with controlled viscosity and sand are spread on the layer of lacquered gravel and that one compacts or cylinder then sweeps the tread.
6. Procédé selon la revendication 5, caractérisé en ce que le sable est un sable de carrière 0/1 à 0/4 et préférentiellement 0/2 à 0/4, à raison 1 à 20 kg/m2 de bande de roulement et préférentiellement entre 3 et 5 kg/m2.6. Method according to claim 5, characterized in that the sand is a quarry sand 0/1 to 0/4 and preferably 0/2 to 0/4, at a rate of 1 to 20 kg / m 2 of tread and preferably between 3 and 5 kg / m 2 .
7. Procédé selon la revendication 5 ou 6 caractérisé en ce que l'émulsion de bitume à viscosité contrôlée assure un apport résiduel en bitume compris entre 100 et 5000 g/m2 de bande de roulement et préférentiellement entre 400 et 1 000 g/m2.7. Method according to claim 5 or 6 characterized in that the bitumen emulsion with controlled viscosity ensures a residual supply of bitumen between 100 and 5000 g / m 2 of tread and preferably between 400 and 1000 g / m 2 .
8. Bande de roulement d'une route caractérisée en ce qu'elle comporte :8. Tread of a road characterized in that it comprises:
- des gravillons laqués déposés sur un support, directement ou par l'intermédiaire d'une couche d'accrochage, le laquage des gravillons étant obtenu par un liant sous forme d'une emulsion de bitume assurant un taux de bitume résiduel compris entre 0,5 % et 10 % et préférentiellement entre 1 et 4 % , les gravillons étant des gravillons1/2 à 2/8 et préférentiellement 2/4 à 2/6, les gravillons laqués étant dosés entre 30 et 60 kg/m2 de bande de roulement pour une épaisseur comprise entre 10 et 100 mm,- lacquered gravel deposited on a support, directly or through a bonding layer, the lacquering of gravel being obtained by a binder in the form of a bitumen emulsion ensuring a residual bitumen rate of between 0, 5% and 10% and preferably between 1 and 4%, the gravel being 1/2 to 2/8 gravel and preferably 2/4 to 2/6, the lacquered gravel being dosed between 30 and 60 kg / m 2 of strip bearing for a thickness between 10 and 100 mm,
- du sable 0/2 à 0/4, pour un dosage compris entre 3 et 5 kg/m2 de bande de roulement,- sand 0/2 to 0/4, for a dosage of between 3 and 5 kg / m 2 of tread,
- une emulsion de bitume à viscosité contrôlée assurant un taux de bitume résiduel compris entre 100 g et 5000 g/m2 et préférentiellement entre 400 g et 1000 g/m2 de bande de roulement.- a bitumen emulsion with controlled viscosity ensuring a residual bitumen rate of between 100 g and 5000 g / m 2 and preferably between 400 g and 1000 g / m 2 of tread.
9. Bande de roulement selon la revendication 8, caractérisée en ce que le sable est un sable de carrière dont la propreté peut être limitée à un équivalent de sable supérieure ou égale à 40.9. A tread according to claim 8, characterized in that the sand is a quarry sand whose cleanliness can be limited to an equivalent of sand greater than or equal to 40.
10. Bande de roulement selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est destinée à la réalisation de chaussée de circulation à un trafic faible ou réduit, et qu'elle possède une rugosité mesurée à la méthode dite « hauteur au sable » comprise entre HSv 0,5 et 1 mm et que son module de rigidité est inférieur ou égal à 3 000 Mpa. 10. A tread according to any one of the preceding claims, characterized in that it is intended for producing traffic pavement with low or reduced traffic, and that it has a roughness measured using the so-called "height" method. sand ”between HSv 0.5 and 1 mm and that its stiffness modulus is less than or equal to 3000 Mpa.
EP99923682A 1998-06-08 1999-06-07 Composition and method for producing a road surface course Withdrawn EP1027386A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9807184A FR2779424B1 (en) 1998-06-08 1998-06-08 COMPOSITION AND METHOD FOR PRODUCING A LAYER OF A ROAD, CORRESPONDING LAYER
FR9807184 1998-06-08
PCT/FR1999/001335 WO1999064517A1 (en) 1998-06-08 1999-06-07 Composition and method for producing a road surface course

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EP1027386A1 true EP1027386A1 (en) 2000-08-16

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JP (1) JP2002517644A (en)
AU (1) AU4046399A (en)
FR (1) FR2779424B1 (en)
HU (1) HUP0003814A3 (en)
PL (1) PL338446A1 (en)
SK (1) SK1442000A3 (en)
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GB0008042D0 (en) * 2000-04-01 2000-05-24 Asphalt & Mineral Dev Co Ltd Production process and apparatus

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US3868263A (en) * 1970-06-22 1975-02-25 Kenneth E Mcconnaughay Method of making a paving composition
FR2686630A1 (en) * 1992-01-24 1993-07-30 Screg Routes & Travaux PROCESS FOR MANUFACTURING ROAD COILS BY DOUBLE COATING.
DK135694A (en) * 1994-11-28 1996-05-29 Vejtek Int As Process for surface treatment of road surfaces
GB9511698D0 (en) * 1995-06-09 1995-08-02 Wimpey Minerals Ltd Bituminous coated materials

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AU4046399A (en) 1999-12-30
FR2779424B1 (en) 2000-08-18
FR2779424A1 (en) 1999-12-10
ZA200000522B (en) 2001-03-06
SK1442000A3 (en) 2000-08-14
JP2002517644A (en) 2002-06-18
HUP0003814A2 (en) 2001-02-28
WO1999064517A1 (en) 1999-12-16
HUP0003814A3 (en) 2002-08-28

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