LU86165A1 - PROCESS FOR OBTAINING SURFACE ROAD COATINGS BY SPREADING AQUEOUS BITUMEN EMULSIONS, AND COATINGS OBTAINED - Google Patents

PROCESS FOR OBTAINING SURFACE ROAD COATINGS BY SPREADING AQUEOUS BITUMEN EMULSIONS, AND COATINGS OBTAINED Download PDF

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Publication number
LU86165A1
LU86165A1 LU86165A LU86165A LU86165A1 LU 86165 A1 LU86165 A1 LU 86165A1 LU 86165 A LU86165 A LU 86165A LU 86165 A LU86165 A LU 86165A LU 86165 A1 LU86165 A1 LU 86165A1
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Luxembourg
Prior art keywords
coatings
emulsion
spreading
weight
agent
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Application number
LU86165A
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French (fr)
Inventor
Georges Langumier
Original Assignee
Colas Sa
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Application filed by Colas Sa filed Critical Colas Sa
Publication of LU86165A1 publication Critical patent/LU86165A1/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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
    • E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
    • 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
    • E01C19/12—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 distributing granular or liquid materials
    • E01C19/16—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 distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • 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
    • E01C19/12—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 distributing granular or liquid materials
    • E01C19/16—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 distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars
    • 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
    • E01C19/45—Portable apparatus for preparing, or for preparing and applying to the road, compound liquid binders, e.g. emulsified bitumen, fluxed asphalt

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Paving Structures (AREA)
  • Road Repair (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

La présente invention concerne un procédé d’obten-' tion d'enduits routiers superficiels par épandage d émul sions aqueuses de bitume.The present invention relates to a process for obtaining surface road coatings by spreading aqueous bitumen emulsions.

Le dépôt d'enduits superficiels est un moyen écono-5 mique pour redonner certaines propriétés de surface, notamment de l'imperméabilité et de la rugosité, aux revêtements routiers ou autres, usés. Ces enduits sont composés de liants hydrocarbonés, rendus fluides pour l'épandage, soit sous forme d'émulsions aqueuses, soit par adjonction au 10 bitume de fractions légères de distillation du pétrole ou . de la houille. Les mélanges de bitumes et produits hydrocarbonés, connus sous le nom d'enduits anhydres, sont répandus sur le sol à température élevée en général comprise entre 1200 C et 160 ° C, alors que les émulsions aqueuses de bitume 15 le sont vers 70°C ou même à température ambiante, ce qui est un de leurs avantages. Par contre, la prise des enduits anhydres est nettement plus rapide et sûre que celle des enduits à base d'émulsions aqueuses, dont la prise est en outre très influencée par les conditions de température 20 et d'hygrométrie ambiantes, puisque dans ce cas la prise nécessite l'évaporation de l'eau, contenue dans l'émulsion répandue ; cette phase d'évaporation, qui implique la rupture de l'émulsion, est d'autant plus importante qu'elle conditionne la fixation des granulats à' la surface de la 25 chausséê. Ces problèmes ont conduit à la préparation d'enduits superficiels à l'émulsion de bitume, composés de deux couches, ce qui permet de remettre la chaussée traitée rapidement en circulation ; on conçoit que de tels enduits bicouches soient plus coûteux, et il était souhai-30 table de mettre au point un procédé d'obtention d'enduits superficiels, peu coûteux, monocouches, répandables à température voisine de la température ambiante et pourtant de prise rapide et sûre, c'est-à-dire donnant des revêtements •--vs;. non fragiles, très cohérents, peu de temps après l'épandage.The deposition of surface coatings is an economical way to restore certain surface properties, in particular impermeability and roughness, to worn road or other surfaces. These coatings are composed of hydrocarbon binders, made fluid for spreading, either in the form of aqueous emulsions, or by the addition of light petroleum distillation or fractions to the bitumen. coal. Mixtures of bitumens and hydrocarbon products, known under the name of anhydrous coatings, are spread on the soil at high temperature generally between 1200 ° C. and 160 ° C., while aqueous bitumen emulsions are spread around 70 ° C. or even at room temperature, which is one of their advantages. On the other hand, the setting of anhydrous coatings is much faster and safer than that of coatings based on aqueous emulsions, the setting of which is also very influenced by the ambient temperature and humidity conditions, since in this case the taken requires evaporation of the water, contained in the spilled emulsion; this phase of evaporation, which involves the breaking of the emulsion, is all the more important as it conditions the fixing of the aggregates to the surface of the roadway. These problems have led to the preparation of surface coatings with bitumen emulsion, composed of two layers, which makes it possible to put the treated pavement back into circulation quickly; it is understood that such two-layer coatings are more expensive, and it was desirable to develop a process for obtaining surface coatings, inexpensive, monolayers, which can be spread at a temperature close to room temperature and yet which sets quickly and safe, ie giving coatings • --vs ;. non-fragile, very consistent, shortly after spreading.

35 ' Le procédé d'obtention d'enduit superficiel selon l'invention consiste.à répandre sur la chaussée simultané- y ment une émulsion aqueuse bitumineuse classique et un agent \ __„ . .The process for obtaining a surface coating according to the invention consists in spreading on the roadway simultaneously a conventional bituminous aqueous emulsion and an agent. .

» 2 de rupture de ladite émulsion, dans des conditions telles que la rupture de l'émulsion se produise rapidement dans l'ensemble de la masse répandue."2 rupture of said emulsion, under conditions such that the rupture of the emulsion occurs quickly throughout the mass spread.

Pour que la rupture ait lieu dans la masse, on doit 5 projeter l'agent de rupture sur le pinceau d'émulsion tombant verticalement de la répandeuse, dans la partie inférieure de ce pinceau, de préférence dans la moitié inférieure.For the rupture to take place in the mass, the breaking agent must be sprayed onto the emulsion brush falling vertically from the spreader, in the lower part of this brush, preferably in the lower half.

L'angle d'incidence est fonction de la puissance 10 du jet d'agent de rupture, des produits utilisés et des conditions atmosphériques ; il est en général compris entre 10e et 30° et sera facilement adapté par le spécialiste aux caractéristiques spécifiques du travail à effectuer, au besoin après des essais préalables.The angle of incidence is a function of the power of the jet of breaking agent, of the products used and of the atmospheric conditions; it is generally between 10 ° and 30 ° and will be easily adapted by the specialist to the specific characteristics of the work to be performed, if necessary after preliminary tests.

15 Divers agents de rupture des émulsions d'hydrocar bures sont connus : leur action résulte généralement d'une réaction de neutralisation ou encore de précipitation du milieu émulsionné'; la nature de l’agent de rupture dépend essentiellement du bitume émulsionné et de l'agent émulsi-20 fiant. Dans le cas d'une émulsion cationique, de pH supérieur à 2,5 et contenant 60 à 75 % en poids de liant bitu-mineux et de 0,1 à 0,5 % en poids, d'un émulsifiant de type chlorhydrate d'amine grasse ou d'imidazoline, l'agent de rupture peut être une solution aqueuse, de concentration 25 comprise entre 5 et 25 %, d'une base forte minérale, comme l'hydroxyde de sodium, ou d'un agent tensio-actif anionique, comme un alkyl(C10-C20)sulfate, ou un de leurs mélanges; la quantité de solution d'agent de rupture .projetée corres-• pond à 0,2 à 1 % en poids d'agent par rapport au poids 30 de l'émulsion à traiter.Various agents for breaking hydrocarbon emulsions are known: their action generally results from a neutralization reaction or else from precipitation of the emulsified medium; the nature of the breaking agent depends essentially on the emulsified bitumen and the fiant emulsi-20 agent. In the case of a cationic emulsion, with a pH greater than 2.5 and containing 60 to 75% by weight of bituminous binder and from 0.1 to 0.5% by weight, of an emulsifier of the hydrochloride type d fatty amine or imidazoline, the breaking agent may be an aqueous solution, of concentration between 5 and 25%, of a strong mineral base, such as sodium hydroxide, or of a surfactant anionic active, such as a (C10-C20) alkyl sulphate, or a mixture thereof; the quantity of solution of breaking agent projected corresponds to 0.2 to 1% by weight of agent relative to the weight of the emulsion to be treated.

On préfère utiliser un bitume de pénétration 80/100, ou mieux 180/220 (tel que défini par la norme NF T 65-001), en mélange avec 5 à 15 % en poids de bitume fluide, de -~4; viscosité ENGLER comprise entre 0 et 1 ; la teneur en liant 35 d'e l'émulsion est de préférence comprise entre 65 et 75 % en. poids et son pH supérieur^ à 3.We prefer to use an 80/100 penetration bitumen, or better 180/220 (as defined by standard NF T 65-001), mixed with 5 to 15% by weight of fluid bitumen, from - ~ 4; ENGLER viscosity between 0 and 1; the content of binder 35 of the emulsion is preferably between 65 and 75%. weight and its pH greater than 3.

, La façon dont l'agent de rupture et l'émulsion sont 3 r fe mis en contact est une autre caractéristique importante du procédé de l'invention. On a constaté,en effet que lorsque l'agent de rupture est envoyé sur la surface de l'émulsion déjà déposée sur le sol, le phénomène de rupture 5 ne se propage pas dans la masse et la prise a lieu superficiellement, conduisant à la formation d'une peau et d'un revêtement de mauvaise qualité.Another important characteristic of the process of the invention is the way in which the breaking agent and the emulsion are brought into contact. It has been found, in fact, that when the breaking agent is sent to the surface of the emulsion already deposited on the ground, the breaking phenomenon 5 does not propagate in the mass and the setting takes place superficially, leading to the poor quality skin and coating.

La figure 1-A montre l'orientation relative préférée du pinceau d'émulsion E et du jet d'agent de rupture R, 10 par rapport au sol S.Figure 1-A shows the preferred relative orientation of the emulsion brush E and the jet of rupture agent R, 10 with respect to the ground S.

La figure 1-B montre le cas précédemment décrit de dépôts successifs, ce qui entraîne la formation d'une peau.Figure 1-B shows the previously described case of successive deposits, which leads to the formation of a skin.

La figure 1-C schématise un procédé de répandage 15 simultané qui, en général, ne donne pas de résultats convenables du fait de la désorganisation du pinceau d'émulsion bitumineuse tombant sur le sol ; dans ce cas le jet d'agent de rupture est dirigé vers le haut du pinceau d'émulsion, près de la sortie de la répandeuse, et entre en contact 20 avec le pinceau dans la moitié supérieure de celui-ci.FIG. 1-C schematizes a method of simultaneous spreading which, in general, does not give suitable results due to the disorganization of the bituminous emulsion brush falling on the ground; in this case, the jet of breaking agent is directed upwards from the emulsion brush, near the outlet of the spreader, and comes into contact with the brush in the upper half thereof.

Le procédé d'obtention d'enduits superficiels à Îi base d'émulsions bitumineuses selon l'invention peut être -â|§ mis en oeuvre dans les conditions classiques de répandage des enduits superficiels sans utilisation d'agent de rup-25 ture ; les vitesses des pompes de distribution de l'émulsion,* la répandeuse et sa vitesse d'avancement ainsi que la quantité d'émulsion répartie sur une superficie donnée, n'ont pas à être modifiées, ce qui est un autre avantage de l'invention, l'homme du métier étant à même d'y adapter 30 les conditions de pulvérisation de l'agent de rupture, en fonction de la nature des composés utilisés et des conditions spécifiques du travail.The process for obtaining surface coatings based on bituminous emulsions according to the invention can be carried out under the conventional conditions for spreading surface coatings without the use of surfacing agent; the speeds of the emulsion distribution pumps, * the spreader and its forward speed as well as the quantity of emulsion distributed over a given area, do not have to be modified, which is another advantage of the invention, the skilled person being able to adapt to it the conditions for spraying the breaking agent, depending on the nature of the compounds used and the specific working conditions.

Les revêtements'obtenus par ce procédé, caractérisés par une prise rapide à température ambiante, associée à 35 de bonnes propriétés de surface, sont un autre objet de l'invention.Another object of the invention is the coatings obtained by this process, characterized by rapid setting at room temperature, associated with good surface properties.

* Danc ^ce qui suit, on décrit des exemples de mis.e 4 t en oeuvre de l'invention.* In the following, examples of the implementation of the invention are described.

Exemple 1 a) Emulsion aqueuse bitumineuseExample 1 a) Bituminous aqueous emulsion

On émulsifie 650 kg d'un mélange comportant 600 kg 5 de bitume pur 180/220 (.selon norme NF T-65 001) et 50 kg de bitume fluide 0/1 avec 350 kg d'une solution aqueuse d'un chlorhydrate d'une diamine (résultant de l'action sur 4 kg de diamine de suif, de 2,6 kg de solution aqueuse (R) de HCl à 32 % en poids), dans un homogénéiseur COLAS ', 10 en introduisant le bitume à 130°C et la phase aqueuse à 500C.650 kg of a mixture is emulsified comprising 600 kg of pure bitumen 180/220 (. According to standard NF T-65 001) and 50 kg of fluid bitumen 0/1 with 350 kg of an aqueous solution of hydrochloride d 'a diamine (resulting from the action on 4 kg of tallow diamine, of 2.6 kg of aqueous solution (R) of HCl at 32% by weight), in a COLAS homogenizer', 10 by introducing the bitumen at 130 ° C and the aqueous phase at 500C.

b) Agent de ruptureb) Agent of rupture

Il est composé d'une solution aqueuse contenant 10 % en poids d'hydroxyde de sodium et 2 % en poids de 15 lauryl-sulfate de sodium.It is composed of an aqueous solution containing 10% by weight of sodium hydroxide and 2% by weight of sodium lauryl sulfate.

c) Répandage A l'aide d'une rampe à émulsions équipée de gicleurs à pinceau située à 25 cm environ du sol, on répand à température ambiante 1,8 à 1,9 kg/m2 de l’émulsion obtenue selon 20 a) sur . la chaussée et simultanément, sous un angle d'incidence de 60° à 25°, 50 g/m2 de solution d'agent de rupture obtenue selon b) ; des gravillons 6/10 sont ensuite répartis sur le sol à raison de 8 1/m2. La prise du revêtement se fait à une température de 15eC en 2 heures environ ; 25 à ce marnent, la remise en circulation de la chaussée peut être réalisée. En appliquant le même mode opératoire que précédemment, on préparera un revêtement monocouche à double gravillonnage avec 2,1 à 2,4 kg/m2 d'émulsion obtenue selon a), et 7 à 9 1/m2 de gravillons 10/14 et 30 4 à 7 1/m2 de gravillons 4/6 ; la prise aura lieu en 2 heures environ.c) Spreading Using an emulsion ramp fitted with brush sprinklers located approximately 25 cm from the ground, 1.8 to 1.9 kg / m2 of the emulsion obtained is spread at room temperature according to 20 a) sure . the roadway and simultaneously, at an angle of incidence of 60 ° to 25 °, 50 g / m2 of solution of breaking agent obtained according to b); 6/10 gravel is then distributed on the ground at a rate of 8 1 / m2. The coating sets at a temperature of 15 ° C in about 2 hours; 25 at this marnent, the recirculation of the roadway can be carried out. By applying the same procedure as above, a double-grained monolayer coating will be prepared with 2.1 to 2.4 kg / m2 of emulsion obtained according to a), and 7 to 9 1 / m2 of gravel 10/14 and 30 4 to 7 1 / m2 of gravel 4/6; the taking will take place in approximately 2 hours.

Exemple 2 : Etude de l'amélioration de la qualité de la * fixation des gravillonsExample 2: Study of the improvement in the quality of the * gravel fixing

On a préparé, en laboratoire, des revêtements de 35 plaques métalliques, en étalant l'émulsion aqueuse bitumineuse obtenue selon l'exemple 1-a) en présence, ou non, de l'agent de rupture selon 1-b), et en répartissant sur f # 1 5 » « le revêtement obtenu, selon une technique habituelle, des = gravillons (adaptation de l'essai d'adhésion globale à la plaque Vialit). On a mesuré le pourcentage de gravillons restant collés aux plaques métalliques supports après 5 retournement de celles-ci, à différents moments après leur ' recouvrement. Les résultats obtenus, qui figurent dans le tableau 1, démontrent que la prise de l'émulsion est beaucoup plus rapide en présence d'agent de rupture.Coatings of 35 metal plates were prepared in the laboratory by spreading the aqueous bituminous emulsion obtained according to example 1-a) in the presence or not of the breaking agent according to 1-b), and in distributing on f # 1 5 "" the coating obtained, according to a usual technique, = gravel (adaptation of the overall adhesion test to the Vialit plate). The percentage of gravel remaining stuck to the metal support plates was measured after turning them over, at different times after their covering. The results obtained, which appear in Table 1, demonstrate that the setting of the emulsion is much faster in the presence of breaking agent.

TABLEAU 1 10 _!_:_:_ % de prise de l'émulsion à 22°C1TABLE 1 10 _! _: _: _% Uptake of the emulsion at 22 ° C1

Durée _^_ témoin essai 30 mn 0 % 45 % 1 heure 12 % 54 % 2 heures 17 S 59 % mesurée par rapport au nombre de gravillons restés collés à la plaque au nombre total de gravillons répartis.Duration _ ^ _ test indicator 30 min 0% 45% 1 hour 12% 54% 2 hours 17 S 59% measured in relation to the number of gravel stuck to the plate to the total number of gravel distributed.

/2 - /K ' 2/ 2 - / K '2

Claims (3)

6 * * ** ΐ ~ 1. Procédé d'obtention d'enduits superficiels par répandage d'émulsions aqueuses de bitumes, caractérisé en ce que la composition bitumineuse est mise en contact avec un agent 5 de rupture de 1'émulsion.6 * * ** ΐ ~ 1. Process for obtaining surface coatings by spreading aqueous bitumen emulsions, characterized in that the bituminous composition is brought into contact with an agent for breaking the emulsion. 2. Procédé selon la revendication 1, dans lequel l'émulsion aqueuse bitumineuse comporte 60 à 75 % en poids de liant bitumineux, et de 0,1 à 0,5 % en poids d'un émulsifiant cationique, caractérisé en ce que l'on projette de 0,2 à 1 % 10 en poids d'un agent de rupture en solution aqueuse choisi parmi les bases fortes, les tensio-actifs anioniques ou leurs mélanges .2. Method according to claim 1, in which the aqueous bituminous emulsion comprises 60 to 75% by weight of bituminous binder, and from 0.1 to 0.5% by weight of a cationic emulsifier, characterized in that 0.2 to 1% by weight of a breaking agent in aqueous solution is chosen, chosen from strong bases, anionic surfactants or their mixtures. 3. Revêtements superficiels de chaussée, à prise rapide, caractérisés en ce qu’ils sont obtenus par un procédé 15 selon l'une des revendications 1 ou 2. ''Λν,',ν3. Quick-setting pavement surface coatings, characterized in that they are obtained by a process 15 according to one of claims 1 or 2. '' Λν, ', ν
LU86165A 1984-11-21 1985-11-13 PROCESS FOR OBTAINING SURFACE ROAD COATINGS BY SPREADING AQUEOUS BITUMEN EMULSIONS, AND COATINGS OBTAINED LU86165A1 (en)

Applications Claiming Priority (2)

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FR8417758 1984-11-21
FR8417758A FR2573455B1 (en) 1984-11-21 1984-11-21 PROCESS FOR OBTAINING SURFACE ROAD COATINGS BY SPREADING AQUEOUS BITUMEN EMULSIONS AND COATINGS OBTAINED

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AT (1) AT396138B (en)
AU (1) AU580114B2 (en)
BE (1) BE903679A (en)
CA (1) CA1276082C (en)
CH (1) CH666924A5 (en)
CY (1) CY1474A (en)
DE (1) DE3540249C2 (en)
ES (1) ES8705066A1 (en)
FR (1) FR2573455B1 (en)
GB (1) GB2167975B (en)
IE (1) IE57173B1 (en)
IT (1) IT1201494B (en)
LU (1) LU86165A1 (en)
MX (1) MX168624B (en)
NZ (1) NZ214270A (en)
ZA (1) ZA858799B (en)

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CH666924A5 (en) 1988-08-31
CY1474A (en) 1989-07-21
IE852911L (en) 1986-05-21
FR2573455A1 (en) 1986-05-23
NZ214270A (en) 1988-09-29
CA1276082C (en) 1990-11-13
FR2573455B1 (en) 1986-12-26
AU5026585A (en) 1986-05-29
DE3540249C2 (en) 1995-01-26
MX168624B (en) 1993-06-02
BE903679A (en) 1986-05-20
GB2167975A (en) 1986-06-11
IE57173B1 (en) 1992-05-20
IT1201494B (en) 1989-02-02
ES8705066A1 (en) 1987-04-16
ZA858799B (en) 1986-07-30
ES549079A0 (en) 1987-04-16
IT8522825A0 (en) 1985-11-14
ATA337385A (en) 1992-10-15
GB2167975B (en) 1988-11-16
GB8528322D0 (en) 1985-12-24
AU580114B2 (en) 1989-01-05
DE3540249A1 (en) 1986-05-28
AT396138B (en) 1993-06-25

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