WO2000047820A1 - Bituminous upper layer draining blanket - Google Patents

Bituminous upper layer draining blanket Download PDF

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Publication number
WO2000047820A1
WO2000047820A1 PCT/FR2000/000374 FR0000374W WO0047820A1 WO 2000047820 A1 WO2000047820 A1 WO 2000047820A1 FR 0000374 W FR0000374 W FR 0000374W WO 0047820 A1 WO0047820 A1 WO 0047820A1
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WO
WIPO (PCT)
Prior art keywords
layer
bituminous
partial
draining
aggregates
Prior art date
Application number
PCT/FR2000/000374
Other languages
French (fr)
Inventor
Jean-Paul Michaut
Original Assignee
Colas
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 filed Critical Colas
Priority to EP00905140A priority Critical patent/EP1155195A1/en
Priority to JP2000598710A priority patent/JP2002536571A/en
Priority to PL00352316A priority patent/PL352316A1/en
Priority to AU26774/00A priority patent/AU2677400A/en
Priority to CA002362017A priority patent/CA2362017A1/en
Publication of WO2000047820A1 publication Critical patent/WO2000047820A1/en

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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
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224—Surface drainage of streets
    • E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • E01C11/226—Coherent pavings

Definitions

  • the invention relates to a draining bituminous wearing course, a process for producing such a wearing course, as well as to a roadway comprising such a wearing course.
  • the bituminous running wearing course, object of the present invention is intended for the production of subject surface layers of subject pavements:
  • a draining wearing course in its current design, consists of a layer of granular material coated with a hydrocarbon binder and used at the required thickness.
  • the percentage of voids and the shape of the voids are such that rainwater can circulate in communicating voids once this layer is in place.
  • This layer is usually laid by means of a bonding layer on an underlayment layer in the realization of new pavement or on a surface layer in pavement maintenance.
  • the tie layer seals the underlying layer. if this is not already done by itself and ensures at the same time a perfect bonding between the two layers. This perfect bonding gives these two layers a behavior so similar to that of a single layer.
  • the layers of draining bituminous concrete are '• normal ized by the NFP 98 standard. 1 34 as having - a void content of the order of 20%, and - a percolation speed measured using a mass flow meter (NFP 98- 254-3) greater than 0.4 cm / s. and • characterized in the technical opinions concerning the pavements made in special draining mixes for company products as having
  • the surface drainage for its part, remains good.
  • the object of the invention is to remedy the drawbacks mentioned above and to avoid, at the very least, that the drainage function in the mass deteriorates.
  • the invention must allow at the same time to improve adhesion and reduce the noise nuisance caused by this type of mix. This goal must be achieved in good economic conditions
  • the object of the invention is achieved by creating a granular differential and by promoting the horizontal and vertical drainage functions in the mass of the mix by an adapted granular structure. This object is achieved under good economic conditions by using for part of the wearing course a modified bitumen which encloses a high proportion of road bitumen
  • the invention relates to a draining bituminous wearing course comprising two parts or layers partial, which share the improvement of the specific functions of the new wearing course, namely improving the surface characteristics and improving the drainage and anti-rutting power
  • the drainage bituminous wearing course consists of two overlapping partial layers including the partial layer upper layer contains aggregates of small particle size and a modified bituminous binder, and the lower partial layer comprises aggregates of large particle size and a bituminous binder
  • the partial layers are formed or treated with hydrocarbon binders, elastomeric or not
  • the partial layers of the wearing course are formulated so that the resulting wearing course
  • the invention also relates to the characteristics below considered in isolation or in all their technically possible combinations:
  • the particle size ratio of the aggregates of the two partial layers is of the order of 3.1 to 4: 1
  • the granulometry of the aggregates of the upper partial layer is chosen from the ranges of 2/4, 4/6 and 6/10
  • the granulometry of the aggregates of the lower partial layer is chosen from the ranges 10/1410/20 and 14/20
  • the aggregates are of monogranular type without fines in the upper partial layer.
  • the aggregates are of the monogranular type with no fines in the lower partial layer.
  • monogra ⁇ ulaire means the use of a single granular class for the preparation of the material respectively of the upper or lower partial layer.
  • the vacuum content of the lower partial layer of the wearing course is greater than or equal to 25%.
  • the percolation speed measured with a site dramometer (NF P 98-254-3) on the wearing course is greater than or equal to 3.2 cm / s
  • the roughness Hsv of the upper partial layer is greater than or equal to 0.80 mm (NF P 98-216-1).
  • the sound attenuation of the rolling noise linked to the complex of the wearing course is greater than or equal to 3dBA
  • One and / or the other of the lower and upper partial layers can comprise mineral or organic additives.
  • These additives can be, for example, rock or glass fibers or waste aggregates. They are introduced during the manufacturing of the material to constitute the corresponding partial layer
  • the modified bitumen used for the production of at least one of the partial layers contains at least one elastomer or polymer and a very high proportion of road bitumens, that is to say at least one bitumen having a significant percentage of asphaltenes
  • the use of such a modified bitumen makes it possible to improve the characteristics of the products obtained and achieve the goal of the invention under very good economic conditions
  • the modified bitumen which is advantageously used for the realization of one or the other, or optionally of each of the two partial layers, is obtained in two stages according to which in the first stage a homogeneous dispersion consisting of elastomer and bitumen selected has a low percentage of saturated products and asphaltenes, and in the second stage the dispersion is diluted with a road bitumen.
  • the preferred elastomer is an elastomer based on styrene-butadiene-styrene, advantageously of the linear type and the selected bitumen contains less than 6% of saturated products and less than 7% of asphaltenes and has a colloidal instability index of between 02 and 0.6
  • the modified bitumen comprises, by weight, at least 30%, advantageously more than 50% of road bitumen and at least 3% of elastomer
  • the modified bitumen has one or the other of the following characteristics considered individually or in combination - penetration at 25 ° C between 40 and 200
  • 1 / 10th of a mm preferably between 40 and 80 1 / 10th of a mm and, depending on a particular choice, 62 1 / 10th of a mm
  • a ball-ring temperature greater than 60 ° C, preferably greater than 85 ° C and according to a particular choice of 95 ° C,
  • the formulation of the upper layer and that of the lower layer are chosen so that the respective particle size curves are continuous and the partial layers have a high void ratio, this rate being approximately the same for the two partial layers, namely between 20 and 30, preferably between 25 and 30 It is understood that, to obtain even approximately only the same void rate in the two partial layers, it is important to choose the particle size formulation accordingly for each of the partial layers.
  • the particle size composition for a granularity 0/10 is as follows:
  • the formulation thus made makes it possible to obtain, for the upper layer, with the modified bitumen as a recommended binder and with a layer thickness of 4 cm, a permeability or percolation rate of approximately 39 cm / s
  • An upper draining partial layer of asphalt mixes with a grain size, for example 2/4 - 4/6 with an elastomeric binder and reduced surface thickness of the order of 1.5 to 2 cm makes it possible to
  • the particle size composition for a granularity 0/14 is as follows
  • the formulation thus made makes it possible to obtain, for the lower layer, with the recommended binder, namely a road bitumen, and with a layer thickness of 4 cm, a permeability or percolation rate of approximately 3.9 cm / s A
  • the percolation speed through draining wearing courses produced before the invention is of the order of 1.5 cm / s
  • a lower partial draining layer of asphalt with very large particle size for example 10/14 - 14/20, with an elastomeric binder or not and with a thickness of the order of 2.5 to 4 cm allows
  • a subject of the invention is also a hot bituminous asphalt mix intended to constitute a coating comprising aggregates and a bituminous binder modified by polymers within the meaning of the present invention. Its main advantages are described above.
  • the bituminous coating of the invention may have one or the other of the following technical characteristics, individually or in combination the modified bituminous binder is a pure bitumen modified with a styrene-butadiene-styrene copolymer (SBS),
  • SBS styrene-butadiene-styrene copolymer
  • the modified bituminous binder may be of different composition depending on the partial layer of the coating
  • the modified bituminous binder content is greater than or equal to 3% by weight
  • the aggregates are of the monogranular type without fines for the lower partial layer of the coating • the aggregates are of the monogranular type without fines for the upper partial layer of the coating
  • the upper partial layer has substantially the same void rate as the lower partial layer
  • the average void volume (total void volume divided by the number of voids) of the upper partial layer is smaller than the average void volume of the lower partial layer
  • the filler filler is a filler usually used in the formulation of asphalt mixes of a calcareous nature and provided in a percentage of the order of 1 to 5%, • there are addition of mineral or organic additives.
  • the invention also relates to a roadway produced with a wearing course or a bituminous mix as defined above.
  • the invention also relates to a process for producing a wearing course as defined above, a) the bonding of the two partial layers which can be ensured by an implementation machine ensuring in one pass the implementation of the coating , and b) bonding of the two partial layers which can also be ensured by two passages of the finisher without chemical bonding
  • the specific particle size of the upper partial layer of the coating ensures mechanical attachment to the lower partial layer by interpenetration of the granular elements of the contact surfaces during appropriate compaction
  • bituminous coating according to the invention is manufactured in any asphalt mixing plant conforming to the production of quality asphalt
  • the CANTABRO test which is defined by the Spanish standard NLT-352/86, consists in molding cylindrical test pieces of about 1300 g, then in using them at a chosen temperature in a rotating drum of Los Angeles type. then the weight loss of each test piece after wear The lower the loss, the more resistant the asphalt is considered
  • the manufacturing and processing temperature remains similar to that of monolithic draining mixes with elastomeric binders. It is greater than or equal to 135 ° C.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention concerns a bituminous upper layer draining blanket comprising two partially superposed layers whereof the upper layer comprises aggregate with low particle-size distribution and a modified bituminous binder, and whereof the lower layer comprises aggregate with high particle-size distribution and a bituminous binder.

Description

Couche de roulement bitumineuse drainante Draining bituminous surface layer
L' invention concerne une couche de roulement bitum ineuse drainante un procédé de réalisation d'une tel le couche de roulement, ainsi qu'une chaussée comprenant une tel le couche de roulement La couche de roulement bitumineuse drainante, objet de la présente invention, est desti née à la réalisation de couches de surface de chaussées sollicitées sujettes:The invention relates to a draining bituminous wearing course, a process for producing such a wearing course, as well as to a roadway comprising such a wearing course. The bituminous running wearing course, object of the present invention, is intended for the production of subject surface layers of subject pavements:
• à l'orniérage,• rutting,
• à la pollution. • à un niveau de trafic élevé.• pollution. • at a high traffic level.
En effet, une couche de roulement drainante, dans sa conception actuel le, est constituée d'une couche de matéri aux granulaires enrobés par un liant hydrocarboné et mis en oeuvre à l'épaisseur requise. Le pourcentage de vides et la forme des vides sont tels que l es eaux pluviales peuvent circuler dans les vides communiquants une fois cette couche mise en place.In fact, a draining wearing course, in its current design, consists of a layer of granular material coated with a hydrocarbon binder and used at the required thickness. The percentage of voids and the shape of the voids are such that rainwater can circulate in communicating voids once this layer is in place.
Cette couche est habituel lement posée par l' intermédiaire d une couche d'accrochage sur une couche d ass i se en réal isation de chaussée neuve ou sur une couche de surface en entretien de chaussée. La couche d'accrochage rend la couche sous-jacente étanche. si cel le-ci ne l'est pas déjà par el le-même et assure en même temps un collage parfa it entre les deux couches. Ce col lage parfait confère à ces αeux couches un comportement si milaire à celui d'une coucne unique.This layer is usually laid by means of a bonding layer on an underlayment layer in the realization of new pavement or on a surface layer in pavement maintenance. The tie layer seals the underlying layer. if this is not already done by itself and ensures at the same time a perfect bonding between the two layers. This perfect bonding gives these two layers a behavior so similar to that of a single layer.
Les couches en béton bitumineux drainant sont' • normal isées par la norme N F P 98. 1 34 comme ayant - une teneur en vides de l'ordre de 20% , et - une vitesse de percolation mesurée au draiπomètre de charn ier ( N F P 98-254-3) supérieure à 0.4 cm/s. et • caractérisées dans les avis techniques concernant les chaussées réalisées en des enrobés spéciaux drainants pour les produits d'entreprise comme ayantThe layers of draining bituminous concrete are '• normal ized by the NFP 98 standard. 1 34 as having - a void content of the order of 20%, and - a percolation speed measured using a mass flow meter (NFP 98- 254-3) greater than 0.4 cm / s. and • characterized in the technical opinions concerning the pavements made in special draining mixes for company products as having
- une teneur en vides comprise entre 20 et 25%, et - une vitesse de percolation mesurée au drainomètre de chantier (NF P 98-254-3) comprise entre 0,8 cm/s et 1,3 cm/s Sous l'effet du trafic, la fonction de drainage dans la masse de ce type de couche de roulement décroît dans le temps avec l'âge de la chaussée, de façon variable suivant le produit En effet, la pollution de surface est entraînée par les eaux de pluie dans la masse de l'enrobé- a void content between 20 and 25%, and - a percolation speed measured with the site drainometer (NF P 98-254-3) between 0.8 cm / s and 1.3 cm / s Under the traffic effect, the drainage function in the mass of this type of wearing course decreases over time with the age of the roadway, in a variable manner depending on the product Indeed, surface pollution is caused by rainwater in the mass of the mix
L'effet de chasse, créé par les pneumatiques, qui complète le mouvement gravitaire de l'eau pluviale dans le massif n'assure que partiellement l'entraînement des particules polluantes diversesThe flushing effect, created by the tires, which completes the gravitational movement of rainwater in the massif only partially entrains the various polluting particles
Ces particules polluantes se déposent, colmatent et annihilent la fonction drainante dans la masse de ces couches d'enrobés drainantsThese polluting particles are deposited, clogged and annihilate the draining function in the mass of these layers of draining mixes
La drainabihté de surface, quant à elle, reste bonne Le but de l'invention est de remédier aux inconvénients mentionnés ci-dessus et d'éviter pour le moins que ne se détériore la fonction de drainage dans la masse Avantageusement I invention doit permettre en même temps d'améliorer I adhérence et de réduire les nuisances phoniques engendrées par ce type d'enrobés Ce but doit être atteint dans de bonnes conditions économiquesThe surface drainage, for its part, remains good. The object of the invention is to remedy the drawbacks mentioned above and to avoid, at the very least, that the drainage function in the mass deteriorates. Advantageously, the invention must allow at the same time to improve adhesion and reduce the noise nuisance caused by this type of mix. This goal must be achieved in good economic conditions
Le but de l'invention est atteint en créant un différentiel granulaire et en favorisant les fonctions de drainage horizontal et vertical dans la masse de l'enrobé par une structure granulaire adaptée Ce but est atteint dans de bonnes conditions économiques en utilisant pour une partie de la couche de roulement un bitume modifié qui enferme une forte proportion de bitume routierThe object of the invention is achieved by creating a granular differential and by promoting the horizontal and vertical drainage functions in the mass of the mix by an adapted granular structure. This object is achieved under good economic conditions by using for part of the wearing course a modified bitumen which encloses a high proportion of road bitumen
Ainsi I invention a pour objet une couche de roulement bitumineuse drainante comprenant deux parties ou couches partielles, qui se repartissent l'amélioration des fonctions spécifiques de la nouvelle couche de roulement, à savoir améliorer les caractéristiques de surface et améliorer le drainage et le pouvoir anti-orniérant La couche de roulement bitumineuse drainante comprend deux couches partielles superposées dont la couche partielle supérieure comporte des granulats de faible granulométrie et un liant bitumineux modifié, et dont la couche partielle inférieure comporte des granulats de forte granulométrie et un liant bitumineuxThus, the invention relates to a draining bituminous wearing course comprising two parts or layers partial, which share the improvement of the specific functions of the new wearing course, namely improving the surface characteristics and improving the drainage and anti-rutting power The drainage bituminous wearing course consists of two overlapping partial layers including the partial layer upper layer contains aggregates of small particle size and a modified bituminous binder, and the lower partial layer comprises aggregates of large particle size and a bituminous binder
Les couches partielles sont constituées ou traitées avec des liants hydrocarbonés élastomères ou nonThe partial layers are formed or treated with hydrocarbon binders, elastomeric or not
Les matériaux et les liants sont déterminés en fonctionMaterials and binders are determined according to
• du type de climat • de l'altitude• type of climate • altitude
• du niveau de sollicitation L'invention prend également en compte'• the level of solicitation The invention also takes into account '
• le risque d'orπiérage,• the risk of mining,
• le risque de fissuration par choc thermique, • le risque lié à la vitesse lente des poids lourds et leur circulation canalisée.• the risk of cracking by thermal shock, • the risk linked to the slow speed of heavy goods vehicles and their channeled circulation.
• les risques liées à des zones singulières• the risks linked to unique areas
(courbes a petit rayon zones de freinage, zones de stationnement rampes) Ainsi, les couches partielles de la couche de roulement sont formulées de façon que la couche de roulement résultante(curves with small radius braking zones, ramp parking zones) Thus, the partial layers of the wearing course are formulated so that the resulting wearing course
• ne peut pas orniérer ou ornière peu,• cannot rut or little rut,
• est peu génératrice de bruit, • favorise l'obtention d'une microrugosité accrue en surface en conservant la macrorugosité originelle des enrobés drainants classiques,• does not generate much noise, • promotes the obtaining of an increased microroughness at the surface while retaining the original macroroughness of conventional draining mixes,
• améliore par son assemblage substantiellement la pérennité de la capacité drainante des enrobes dans le temps A cet effet, l'invention concerne également les caractéristiques ci-après considérées isolément ou selon toutes leurs combinaisons techniquement possibles:• substantially improves the durability of the coating's drainage capacity over time by its assembly To this end, the invention also relates to the characteristics below considered in isolation or in all their technically possible combinations:
Le rapport de granulométrie des granulats des deux couches partielles est de I ordre de 3.1 à 4:1The particle size ratio of the aggregates of the two partial layers is of the order of 3.1 to 4: 1
La granulométrie des granulats de la couche partielle supérieure est choisie parmi les gammes de 2/4, 4/6 et 6/10The granulometry of the aggregates of the upper partial layer is chosen from the ranges of 2/4, 4/6 and 6/10
La granulométrie des granulats de la couche partielle inférieure est choisie parmi les gammes 10/1410/20 et 14/20 Les granulats sont de type monogranulaire sans fines dans la couche partielle supérieure.The granulometry of the aggregates of the lower partial layer is chosen from the ranges 10/1410/20 and 14/20 The aggregates are of monogranular type without fines in the upper partial layer.
Les granulats sont de type monogranulaire sans fines dans la couche partielle inférieure.The aggregates are of the monogranular type with no fines in the lower partial layer.
Le terme monograπulaire signifie l'utilisation d'une seule classe granulaire pour la préparation du matériau respectivement de la couche partielle supérieure ou inférieure.The term monograπulaire means the use of a single granular class for the preparation of the material respectively of the upper or lower partial layer.
La teneur en vide de la couche partielle inférieure de la couche de roulement est supérieure ou égale à 25%. La vitesse de percolation mesurée au dramomètre de chantier (NF P 98-254-3) sur la couche de roulement est supérieure ou égale à 3,2 cm/sThe vacuum content of the lower partial layer of the wearing course is greater than or equal to 25%. The percolation speed measured with a site dramometer (NF P 98-254-3) on the wearing course is greater than or equal to 3.2 cm / s
La rugosité Hsv de la couche partielle supérieure est supérieure ou égale à 0,80 mm (NF P 98-216-1). L'atténuation phonique du bruit de roulement liée au complexe de la couche de roulement (NF S 31-119) est supérieure ou égale à 3dBAThe roughness Hsv of the upper partial layer is greater than or equal to 0.80 mm (NF P 98-216-1). The sound attenuation of the rolling noise linked to the complex of the wearing course (NF S 31-119) is greater than or equal to 3dBA
L une et/ou I autre des couches partielles inférieure et supérieure peut comprendre des additifs minéraux ou organiques Ces additifs peuvent être par exemple des fibres de roche ou de verre ou des granulats de déchets. Ils sont introduits lors de la fabrication du matériau pour constituer la couche partielle correspondanteOne and / or the other of the lower and upper partial layers can comprise mineral or organic additives. These additives can be, for example, rock or glass fibers or waste aggregates. They are introduced during the manufacturing of the material to constitute the corresponding partial layer
Le bitume modifié utilisé pour la réalisation d au moins une des couches partielles renferme au moins un élastomère ou polymère et une très forte proportion de bitumes routiers c est-a-dire au moins un bitume ayant un pourcentage notable d asphaltènes L'utilisation d'un tel bitume modifié permet d améliorer les caractéristiques des produits obtenus et d'atteindre le but de l'invention dans de très bonnes conditions économiquesThe modified bitumen used for the production of at least one of the partial layers contains at least one elastomer or polymer and a very high proportion of road bitumens, that is to say at least one bitumen having a significant percentage of asphaltenes The use of such a modified bitumen makes it possible to improve the characteristics of the products obtained and achieve the goal of the invention under very good economic conditions
Le bitume modifié qui est avantageusement utilisé pour la réalisation de l'une ou l'autre, ou éventuellement de chacune des deux couches partielles, est obtenu en deux étapes selon lesquelles dans la première étape on prépare une dispersion homogène constituée d'élastomère et de bitume sélectionné a faible pourcentage en produits saturés et en asphaltènes, et dans la seconde étape on dilue la dispersion avec un bitume routier. L'élastomère préféré est un élastomère à base de styrène-butadiène-styrène, avantageusement de type linéaire Et le bitume sélectionné renferme moins de 6 % de produits saturés et moins de 7 % d'asphaltènes et a un indice d'instabilité colloïdale compris entre 02 et 0,6 Le bitume modifié comprend, en poids, au moins 30 %, avantageusement plus de 50 % de bitume routier et au moins 3 % d'élastomèreThe modified bitumen which is advantageously used for the realization of one or the other, or optionally of each of the two partial layers, is obtained in two stages according to which in the first stage a homogeneous dispersion consisting of elastomer and bitumen selected has a low percentage of saturated products and asphaltenes, and in the second stage the dispersion is diluted with a road bitumen. The preferred elastomer is an elastomer based on styrene-butadiene-styrene, advantageously of the linear type and the selected bitumen contains less than 6% of saturated products and less than 7% of asphaltenes and has a colloidal instability index of between 02 and 0.6 The modified bitumen comprises, by weight, at least 30%, advantageously more than 50% of road bitumen and at least 3% of elastomer
Selon différentes variantes de réalisation, le bitume modifié a l'une ou l'autre des caractéristiques suivantes consiαérées isolément ou en combinaison - une pénétration à 25 °C comprise entre 40 et 200According to different variant embodiments, the modified bitumen has one or the other of the following characteristics considered individually or in combination - penetration at 25 ° C between 40 and 200
1/10ème de mm de préférence entre 40 et 80 1/10ème de mm et, selon un choix particulier, de 62 1/10ème de mm1 / 10th of a mm preferably between 40 and 80 1 / 10th of a mm and, depending on a particular choice, 62 1 / 10th of a mm
- une température bille-anneau supérieure à 60 °C de préférence supérieure à 85 °C et selon un choix particulier de 95 °C,- a ball-ring temperature greater than 60 ° C, preferably greater than 85 ° C and according to a particular choice of 95 ° C,
- un retour élastique à 10 °C supérieur à 90 % et selon un choix particulier de 97 %- an elastic return at 10 ° C greater than 90% and according to a particular choice of 97%
- une cohésion à 35 °C supérieure à 2 J/cm2 et selon un choix particulier de 255 J/cm - une cohésion à 40 °C supérieure à 1.5 J/cm2 et. selon un choix particulier de 1,83 J/cm2 - a cohesion at 35 ° C greater than 2 J / cm 2 and according to a particular choice of 255 J / cm - a cohesion at 40 ° C greater than 1.5 J / cm 2 and. according to a particular choice of 1.83 J / cm 2
La formulation de la couche supérieure et celle de la couche inférieure sont choisies de façon que les courbes de granulométrie respectives soient continues et que les couches partielles présentent un taux de vide important, ce taux étant approximativement le même pour les deux couches partielles, à savoir compris entre 20 et 30, de préférence entre 25 et 30 II est bien entendu que, pour obtenir même approximativement seulement le même taux de vide dans les deux couches partielles, il importe de choisir la formulation granulométπque en conséquence pour chacune des couches partielles.The formulation of the upper layer and that of the lower layer are chosen so that the respective particle size curves are continuous and the partial layers have a high void ratio, this rate being approximately the same for the two partial layers, namely between 20 and 30, preferably between 25 and 30 It is understood that, to obtain even approximately only the same void rate in the two partial layers, it is important to choose the particle size formulation accordingly for each of the partial layers.
Pour la couche partielle supérieure, la granularité utilisée va de 0/4 à 0/10 Avantageusement, la composition granulométπque pour une granularité 0/10 est la suivante:For the upper partial layer, the granularity used ranges from 0/4 to 0/10 Advantageously, the particle size composition for a granularity 0/10 is as follows:
Figure imgf000008_0001
Figure imgf000008_0001
La formulation ainsi faite permet d'obtenir pour la couche supérieure, avec le bitume modifié en tant que liant préconisé et avec une épaisseur de couche de 4 cm, une perméabilité ou vitesse de percolation d'environ 39 cm/sThe formulation thus made makes it possible to obtain, for the upper layer, with the modified bitumen as a recommended binder and with a layer thickness of 4 cm, a permeability or percolation rate of approximately 39 cm / s
Une couche partielle supérieure drainante d'enrobés sans sable de granulométrie, par exemple, 2/4 - 4/6 avec un liant élastomère et d épaisseur réduite en surface de l'ordre de 1,5 à 2 cm permet deAn upper draining partial layer of asphalt mixes with a grain size, for example 2/4 - 4/6 with an elastomeric binder and reduced surface thickness of the order of 1.5 to 2 cm makes it possible to
• assurer les caractéristiques de surface (uni- sécuπté)• ensure the surface characteristics (uni- safety)
• réduire le niveau de bruit, • assurer le contact pneumatique - chaussée,• reduce the noise level, • ensure tire-road contact,
• conforter la rugosité de surface et assurer la macrorugosité Pour la couche partielle inférieure, la granularité utilisée va de 0/2 a 0/14 Avantageusement, la composition granulométπque pour une granularité 0/14 est la suivante• reinforce the surface roughness and ensure macroroughness For the lower partial layer, the granularity used ranges from 0/2 to 0/14 Advantageously, the particle size composition for a granularity 0/14 is as follows
Figure imgf000009_0001
Figure imgf000009_0001
La formulation ainsi faite permet d'obtenir pour la couche inférieure, avec le liant préconisé, à savoir un bitume routier, et avec une épaisseur de couche de 4 cm, une perméabilité ou vitesse de percolation d'environ 3,9 cm/s A titre de comparaison, la vitesse de percolation à travers des couches de roulement drainantes réalisées avant l'invention est de l'ordre de 1,5 cm/sThe formulation thus made makes it possible to obtain, for the lower layer, with the recommended binder, namely a road bitumen, and with a layer thickness of 4 cm, a permeability or percolation rate of approximately 3.9 cm / s A By way of comparison, the percolation speed through draining wearing courses produced before the invention is of the order of 1.5 cm / s
Une couche partielle inférieure drainante d'enrobés à très forte granulométrie, par exemple 10/14 - 14/20, avec un liant élastomère ou non et d'une épaisseur de l'ordre de 2,5 à 4 cm permetA lower partial draining layer of asphalt with very large particle size, for example 10/14 - 14/20, with an elastomeric binder or not and with a thickness of the order of 2.5 to 4 cm allows
• d'annuler l'effet d'encrassement de l'enrobé grâce à sa très forte draiπabilité qui lui confère une durée d'efficacité supérieure aux enrobés drainants de la norme NFP 98-134 ou défini dans les avis techniques sur les produits d'entreprise,• to cancel the fouling effect of the asphalt mix thanks to its very high draiπability which gives it a duration of effectiveness greater than the draining mixes of standard NFP 98-134 or defined in the technical opinions on the products of business,
• d'améliorer le pouvoir anti-orniérant de l'enrobé,• improve the anti-rutting power of the asphalt,
• d'augmenter la capacité de drainage,• increase the drainage capacity,
• de favoriser la circulation horizontale et verticale de l'eau• promote the horizontal and vertical circulation of water
L'invention a aussi pour objet un enrobé bitumineux a chaud drainant destiné à constituer un revêtement comprenant des granulats et un liant bitumineux modifié par des polymères au sens de la présente invention Ses principaux avantages sont décrits ci-avantA subject of the invention is also a hot bituminous asphalt mix intended to constitute a coating comprising aggregates and a bituminous binder modified by polymers within the meaning of the present invention. Its main advantages are described above.
L enrobe bitumineux de I invention peut avoir l'une ou I autre des caractéristiques techniques suivantes, isolément ou en combinaison le liant bitumineux modifié est un bitume pur modifié par un copolymère styrène-butadièπe- styrene (SBS),The bituminous coating of the invention may have one or the other of the following technical characteristics, individually or in combination the modified bituminous binder is a pure bitumen modified with a styrene-butadiene-styrene copolymer (SBS),
• le liant bitumineux modifié peut être de composition différente suivant la couche partielle du revêtement• the modified bituminous binder may be of different composition depending on the partial layer of the coating
• la teneur en liant recommandée est fonction de la classe granulaire utilisée, de l'apport éventuel de filler et de la nature minéralogique des granulats, • la teneur en liant bitumineux modifié est supérieure ou égale à 3 % en poids• the recommended binder content depends on the granular class used, the possible filler input and the mineralogical nature of the aggregates, • the modified bituminous binder content is greater than or equal to 3% by weight
• les granulats sont de type monogranulaire sans fines pour la couche partielle inférieure du revêtement • les granulats sont de type monogranulaire sans fines pour la couche partielle supérieure du revêtement• the aggregates are of the monogranular type without fines for the lower partial layer of the coating • the aggregates are of the monogranular type without fines for the upper partial layer of the coating
• la granulométrie des granulats est conforme à une des gammes suivantes - pour la couche partielle supérieure 2/4 - 4/6 -• the granulometry of the aggregates conforms to one of the following ranges - for the upper partial layer 2/4 - 4/6 -
6/10 ou 0/2 - 2/4 - 4/6 - 6/106/10 or 0/2 - 2/4 - 4/6 - 6/10
- pour la couche partielle inférieure 10/14 - 14/20- for the lower partial layer 10/14 - 14/20
- 10/20 ou 0/2 - 10/14,- 10/20 or 0/2 - 10/14,
• le taux de vide est approximativement le même pour les deux couches partielles,• the void rate is approximately the same for the two partial layers,
• la couche partielle supérieure a sensiblement le même taux de vide que la couche partielle inférieure• the upper partial layer has substantially the same void rate as the lower partial layer
• le volume moyen des vides (volume total des vides divisé par le nombre de vides) de la couche partielle supérieure est plus petit que le volume moyen des vides de la couche partielle inférieure• the average void volume (total void volume divided by the number of voids) of the upper partial layer is smaller than the average void volume of the lower partial layer
• il y a un apport de filler ou non, l'apport de filler peut être nécessaire lors de la fabrication de cet enrobé si la teneur en fines naturelles de la classe (ou des classes) util ιsée(s) est trop faible Le filler d'apport est un filler habituellement utilisé dans la formulation des enrobés de nature calcaire et apporté en un pourcentage de l'ordre de 1 à 5%, • il y a un ajout d'additifs minéraux ou organiques.• there is an addition of filler or not, the addition of filler may be necessary during the manufacture of this mix if the content of natural fines of the class (or classes) used ιsée is too low The filler filler is a filler usually used in the formulation of asphalt mixes of a calcareous nature and provided in a percentage of the order of 1 to 5%, • there are addition of mineral or organic additives.
L'application d'une couche d'accrochage et d'étanchéité (liant et dosage adaptés) permetThe application of a bonding and sealing layer (suitable binder and dosage) allows
• d'assurer le collage au support de la couche, et• ensure bonding to the support of the layer, and
• d'obtenir l'étanchéité de surface de l'ancienne couche de roulement• obtain the surface seal of the old wearing course
L'invention concerne par ailleurs une chaussée réalisée avec une couche de roulement ou un enrobé bitumineux tels que définis ci-avantThe invention also relates to a roadway produced with a wearing course or a bituminous mix as defined above.
L'invention concerne également un procédé de réalisation d'une couche de roulement telle que définie plus haut, a) le collage des deux couches partielles pouvant être assuré par un engin de mise en oeuvre assurant en une seule passe la mise en oeuvre du revêtement, et b) le collage des deux couches partielles pouvant être assuré aussi par deux passages du finisseur sans collage chimiqueThe invention also relates to a process for producing a wearing course as defined above, a) the bonding of the two partial layers which can be ensured by an implementation machine ensuring in one pass the implementation of the coating , and b) bonding of the two partial layers which can also be ensured by two passages of the finisher without chemical bonding
La granulométrie spécifique de la couche partielle supérieure du revêtement assure un accrochage mécanique avec la couche partielle inférieure par interpénétration des éléments granulaires des surfaces de contact lors du compactage appropriéThe specific particle size of the upper partial layer of the coating ensures mechanical attachment to the lower partial layer by interpenetration of the granular elements of the contact surfaces during appropriate compaction
Chaque partie de I enrobé est compactée par cylindrage lisse L'enrobe bitumineux selon l'invention est fabriqué dans n importe quelle centrale d'enrobage conforme à la production d'enrobé de qualitéEach part of the coated asphalt is compacted by smooth rolling The bituminous coating according to the invention is manufactured in any asphalt mixing plant conforming to the production of quality asphalt
Des essais particuliers tel l'essai CANTABRO, qui permet d évaluer la perte de poids d'une éprouvette à l'usure et qui permet donc de mettre en avant la cohésion de l'enrobe ont montré la supériorité des enrobés drainants utilisés pour la réalisation de la couche de roulement selon l'invention par rapport à un enrobé drainant traditionnel, sur la tenue mécanique sous traficSpecial tests such as the CANTABRO test, which makes it possible to evaluate the weight loss of a test piece when worn and which therefore makes it possible to highlight the cohesion of the coating showed the superiority of the draining asphalt used for the production of the wearing course according to the invention compared to a traditional draining asphalt, on the mechanical strength under traffic
En effet, l'essai CANTABRO qui est défini par la norme espagnole NLT-352/86, consiste à mouler des éprouvettes cylindriques d environ 1300 g, puis de les user à une température choisie dans un tambour en rotation de type Los Angeles On mesure alors la perte de poids de chaque éprouvette après usure Plus la perte est faible, plus l'enrobé est considéré comme résistantIn fact, the CANTABRO test, which is defined by the Spanish standard NLT-352/86, consists in molding cylindrical test pieces of about 1300 g, then in using them at a chosen temperature in a rotating drum of Los Angeles type. then the weight loss of each test piece after wear The lower the loss, the more resistant the asphalt is considered
Des essais effectués respectivement à -10 °C et à + 18 °C ont donné le résultat suivant pour la PERTE DE MASSETests carried out respectively at -10 ° C and + 18 ° C gave the following result for LOSS OF MASS
Figure imgf000012_0001
Figure imgf000012_0001
L'enrobé drainant selon l'invention a une perte de masse identique à celle d un enrobe mince et une perte nettement plus faible que celle α un enrobé drainant traditionnel D'autres caractéristiques et avantages non limitatifs de l'invention ressortiront à la lecture de I exemple de réalisation ci-aprèsThe draining mix according to the invention has a loss of mass identical to that of a thin coating and a loss much smaller than that of a traditional draining mix Other characteristics and non-limiting advantages of the invention will emerge on reading I example of embodiment below
- Fabrication de l'enrobé pour la couche partielle inférieure avec • une granulométrie 10/14 > à 95%- Asphalt fabrication for the lower partial layer with • a grain size 10/14> 95%
• un apport αe matière à filler passant au tamis de 80 μ >_à 2%• a supply of material to be filler passing through a sieve of 80 μ> _ at 2%
• une teneur en liant modifié tel que celui connu sous la dénomination « COLFLEX » > à 3 ppc - Fabrication de l'enrobé pour la couche partielle supérieure avec.• a content of modified binder such as that known under the name "COLFLEX"> at 3 ppc - Asphalt fabrication for the upper partial layer with.
• une granulométrie 4/6 > à 95%• a particle size 4/6> 95%
• un apport de matière fil ler passant au tamis de 80 μ > à 2%• a supply of wire material passing through a sieve of 80 μ> 2%
• une teneur en l iant modifié tel que celui connu sous la dénomination « CO LFLEX » > à 4 ppc.• a content of modified cement such as that known under the name "CO LFLEX"> at 4 ppc.
La température de fabrication et de mise en oeuvre reste similaire à cel le des enrobés drainants monolithiques aux l iants élastomères Elle est supérieure ou égale à 135°C. The manufacturing and processing temperature remains similar to that of monolithic draining mixes with elastomeric binders. It is greater than or equal to 135 ° C.

Claims

REVEN D ICATI ONS 1 Couche de roulement bitumineuse drainante comprenant deux couches partielles superposées dont la couche partielle supérieure comporte des granulats de faible granulométrie et un l iant bitumineux modifié, et dont la couche partiel le inférieure comporte des granulats de forte granulométrie et un l iant bitumineux, caractérisée en ce que la couche partiel le supérieure comprend un apport de matière à f 111er entre 2 et 1 1 % en poids 2 Couche selon la revendication 1 , caractérisée en ce que le rapport de granulométrie des granulats des deux couches partiel les est de l'ordre de 3 1 à 4 1REVEN D ICATI ONS 1 Draining bituminous surface layer comprising two superimposed partial layers, the upper partial layer of which is of small particle size aggregates and a modified bituminous bond, and of which the lower partial layer comprises of granules of large particle size and a bond bituminous, characterized in that the upper partial layer comprises a supply of material to be f 111er between 2 and 1 1% by weight 2 layer according to claim 1, characterized in that the granulometry ratio of the aggregates of the two partial layers is in the range of 3 1 to 4 1
3 Couche selon la revendication 1 ou 2, caractérisée en ce que la granulométrie des granulats de la couche partiel le supérieure est choisie parmi les gammes 2/4, 4/6 et 6/1 03 layer according to claim 1 or 2, characterized in that the granulometry of the aggregates of the upper partial layer is chosen from the ranges 2/4, 4/6 and 6/1 0
4 Couche selon l'une des revendications 1 à 3, caractérisée en ce que la granulométrie des granulats de la couche partiel le inférieure est choisie parmi les gammes 10/14, 1 0/20 et 14/204 layer according to one of claims 1 to 3, characterized in that the granulometry of the aggregates of the lower partial layer is chosen from the ranges 10/14, 1 0/20 and 14/20
5 Couche selon l'une des revendications 1 à 4, caractérisée en ce que les deux couches partiel les supérieure et inférieure ont approximativement le même taux de vide5 layer according to one of claims 1 to 4, characterized in that the two upper and lower partial layers have approximately the same void ratio
6 Couche selon l'une des revendications 1 à 4, caractérisée en ce que les deux couches partiel les supérieure et inférieure ont approximativement le même taux de vide et en ce que le volume moyen des vides de la couche partielle supérieure est plus petit que le volume moyen des vides de la couche partiel le inférieure 7 Chaussée comprenant une couche de roulement bitumineuse drainante caractérisée en ce que la couche de roulement est conforme à l'une quelconque des revendications 1 a 66 Layer according to one of claims 1 to 4, characterized in that the two upper and lower partial layers have approximately the same void ratio and in that the average void volume of the upper partial layer is smaller than the average void volume of the lower partial layer 7 Pavement comprising a drainage bituminous wearing course, characterized in that the wearing course conforms to any one of claims 1 to 6
8 Procède de réal isation d' une couche de roulement bitumineuse drainante selon l'une des revendications 1 à 6, caractérisé en ce que les couches partiel les supérieure et inférieure sont appl iquées en un seu l passage d'un finisseur8 A process for realizing a draining bituminous wearing course according to one of claims 1 to 6, characterized in that the upper and lower partial layers are applied in one pass with a finisher
9 Procédé de réal isation d' une couche de roulement bitum i neuse drainante selon l'une des revendications 1 à 6, caractérisé en ce que les couches partielles supérieure et inférieure sont appliquées en deux passages successifs d'un finisseur 9 A method of real isation of a draining bituminous surface course according to one of claims 1 to 6, characterized in that the upper and lower partial layers are applied in two successive passes of a finisher
PCT/FR2000/000374 1999-02-15 2000-02-15 Bituminous upper layer draining blanket WO2000047820A1 (en)

Priority Applications (5)

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EP00905140A EP1155195A1 (en) 1999-02-15 2000-02-15 Bituminous upper layer draining blanket
JP2000598710A JP2002536571A (en) 1999-02-15 2000-02-15 Bitumen upper layer drainage blanket
PL00352316A PL352316A1 (en) 1999-02-15 2000-02-15 Bituminous, dehydrating coating of the top layer
AU26774/00A AU2677400A (en) 1999-02-15 2000-02-15 Bituminous upper layer draining blanket
CA002362017A CA2362017A1 (en) 1999-02-15 2000-02-15 Bituminous upper layer draining blanket

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FR99/01789 1999-02-15
FR9901789A FR2789705B1 (en) 1999-02-15 1999-02-15 DRAINING BITUMINOUS LAYER, PAVEMENT COMPRISING SUCH A LAYER AND METHOD FOR OBTAINING SUCH A LAYER

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FR2807029A1 (en) * 2000-03-31 2001-10-05 Auxiliaire Du Maitre D Ouvrage SEALING COMPLEX, PREPARATIONS, USES; ORIGINAL BITUMINOUS CONCRETE
FR2823233B1 (en) * 2001-04-06 2004-01-30 Colas Sa FREEZE-FREEZE RESISTANT PAVEMENT AND METHOD FOR MANUFACTURING SUCH A PAVEMENT

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DE3926099A1 (en) * 1989-02-03 1990-08-09 Baulabor Ag RELATED CEILING FOR ROADS AND AIRPLANES, METHOD FOR THE PRODUCTION OF THE CEILING AND USE THEREOF
EP0381903A1 (en) * 1989-02-10 1990-08-16 BEUGNET, Société dite Coated materials comprising coarse aggregate and bituminous binder for the construction of layers of roadway coverings and porous roadway covering obtained from such coated materials especially adapted for drainage through surface and noise abatement
FR2688808A1 (en) * 1992-03-19 1993-09-24 Beugnet Sa Draining road surface layer, more especially intended for covering emergency braking lanes of motorways or high-speed roadways, as well as method for obtaining such a draining road surface layer
EP0605377A2 (en) * 1992-11-12 1994-07-06 Fina Research S.A. Composition for bituminous draining mixes
DE29803077U1 (en) * 1998-02-24 1998-06-25 Hermann Kirchner GmbH & Co KG, 36251 Bad Hersfeld Additional equipment for a paver
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DE3926099A1 (en) * 1989-02-03 1990-08-09 Baulabor Ag RELATED CEILING FOR ROADS AND AIRPLANES, METHOD FOR THE PRODUCTION OF THE CEILING AND USE THEREOF
EP0381903A1 (en) * 1989-02-10 1990-08-16 BEUGNET, Société dite Coated materials comprising coarse aggregate and bituminous binder for the construction of layers of roadway coverings and porous roadway covering obtained from such coated materials especially adapted for drainage through surface and noise abatement
FR2688808A1 (en) * 1992-03-19 1993-09-24 Beugnet Sa Draining road surface layer, more especially intended for covering emergency braking lanes of motorways or high-speed roadways, as well as method for obtaining such a draining road surface layer
EP0605377A2 (en) * 1992-11-12 1994-07-06 Fina Research S.A. Composition for bituminous draining mixes
FR2768162A3 (en) * 1997-09-08 1999-03-12 Saada Sa Self-draining road surface
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FR2789705A1 (en) 2000-08-18
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CA2362017A1 (en) 2000-08-17
AU2677400A (en) 2000-08-29
FR2789705B1 (en) 2003-06-20

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