GB2167975A - Process for obtaining surface coatings of bitumen - Google Patents

Process for obtaining surface coatings of bitumen Download PDF

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Publication number
GB2167975A
GB2167975A GB08528322A GB8528322A GB2167975A GB 2167975 A GB2167975 A GB 2167975A GB 08528322 A GB08528322 A GB 08528322A GB 8528322 A GB8528322 A GB 8528322A GB 2167975 A GB2167975 A GB 2167975A
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GB
United Kingdom
Prior art keywords
emulsion
agent
weight
surface coatings
bitumen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08528322A
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GB2167975B (en
GB8528322D0 (en
Inventor
Georges Langumier
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 GB8528322D0 publication Critical patent/GB8528322D0/en
Publication of GB2167975A publication Critical patent/GB2167975A/en
Application granted granted Critical
Publication of GB2167975B publication Critical patent/GB2167975B/en
Expired legal-status Critical Current

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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

Landscapes

  • 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)

Abstract

Coatings are obtained by spreading on a surface an aqueous emulsion of bitumen and contacting this with an agent for breaking down the emulsion.

Description

SPECIFICATION Process for obtaining road surface coatings by the spreading of aqueous emulsions of bitumen and coatings obtained The present invention relates to a process for obtaining surface coatings for roads by the spreading of aqueous emulsions of bitumen.
The deposition of surface coatings is an economical means for imparting certain surface properties, notably those of impermeability and of ruggedness, to the road or other coatings which are used. These coatings are composed of hydrocarbon-containing binders, which are rendered fluid for spreading, either in the form of aqueous emulsions or by the addition to the bitumen of light fractions from the distillation of petroleum or of coal. The mixtures of bitumens and hydrocarbon-containing products, which are known under the name of anhydrous coatings, are spread on the ground at a high temperature which is generally within the range between 120 C and 160 C, while spreading of the aqueous emulsions of bitumen takes place at about 70"C or even at ambient temperature; this is one of their advantages.On the other hand, the hold of the anhydrous coatings is clearly more rapid and reliable than that of the coatings based on aqueous emulsions, the hold of which is moreover influenced to a very great extent by the ambient temperature and humidity conditions, since in this case the hold necessitates the evaporation of the water contained in the emulsion which is spread. This evaporation phase, which involves the breakdown of the emulsion, is all the more significant because it influences the fixation of the aggregates to the surface of the roadway.These problems have led to the preparation of surface coatings which comprise bitumen emulsion and which are composed of two layers, which permits the treated roadway to be used again rapidly for traffic; it is understood that such two-layer coatings are more costly, and it was desirable to develop a process for obtaining surface coatings which are cheap, monolayer, spreadable at a temperature close to ambient temperature and nevertheless exhibiting a rapid and reliable hold, that is to say providing coatings which are non-fragile and very coherent a short time after spreading.
The process for obtaining a surface coating according to the invention consists in spreading on the roadway, simultaneously, a traditional bituminous aqueous emulsion and an agent for breaking down the said emulsion, under conditions such that the breakdown of the emulsion takes place rapidly within the entire spread mass.
In order that the breakdown should take place within the mass, it is necessary to discharge the breakdown agent onto the emulsion brush, falling vertically from the spreader, in the lower part of this brush, preferably in the lower half.
The angle of incidence is a function of the power of the jet of breakdown agent, the products employed and the atmospheric conditions; it is generally within the range between 10 and 30 and will be readily adapted by the specialist to the specific characteristics of the work to be undertaken, if necessary after preliminary tests.
Various agents for breaking down emulsions of hydro-carbons are known: their action generally results from a reaction of neutralisation or indeed of precipitation of the emulsified medium; the nature of the breakdown agent depends essentially on the emulsified bitumen and the emulsifying agent. In the case of a cationic emulsion, having a pH exceeding 2.5 and containing 60 to 75% by weight of bituminous binder and from 0.1 to 0.5% by weight of an emulsifying agent of the fatty amine or imidazoline hydrochloride type, the breakdown agent may be an aqueous solution, having a concentration within the range between 5 and 25%, of a strong mineral base, such as sodium hydroxide, or of an anionic surfactant, such as a (C10-C20) alkylsulphate, or one of the mixtures thereof; the quantity of solution of breakdown agent discharged corresponds to 0.2 to 1% by weight of agent in relation to the weight of the emulsion to be treated.
It is preferred to use a bitumen of penetration 80/100, or more preferably 180/220 (as defined by the standard NF T 65-001), in admixture with 5 to 15% by weight of fluid bitumen, of ENGLER viscosity within the range between 0 and 1; the content of binder in the emulsion is preferably within the range between 65 and 75% by weight, and its pH greater than 3.
The manner in which the breakdown agent and the emulsion are brought into contact is another significant characteristic of the process of the invention. It has in fact been noted that when the breakdown agent is sent to the surface of the emulsion which has already been deposited on the ground, the phenomenon of breakdown is not propagated within the mass and the hold takes place superficially, leading to the formation of a skin and of a coating of poor quality.
Figure 1-A shows the preferred relative orientation of the emulsion brush E and of the jet of breakdown agent R, in relation to the ground S.
Figure 1-B shows the case previously described of successive deposits; this involves the formation of a skin.
Figure 1-C shows in schematic form a process for simultaneous spreading which, in general does not give satisfactory results because of the disturbance of the brush of bituminous emulsion falling on the ground; in this case, the jet of breakdown agent is directed towards the upper part of the emulsion brush near the outlet of the spreader, and comes into contact with the brush in the upper half of the latter.
The process for obtaining surface coatings based on bituminous emulsions according to the invention may be implemented under the traditional conditions of spreading surface coatings without the use of a breakdown agent; the speeds of the pumps for the distribution of the emulsion, the spreader and its speed of advancement as well as the quantity of emulsion distributed on a given surface, do not need to be modified; this is another advantage of the invention, the person skilled in the art being in a position to adapt thereto the conditions of atomisation of the breakdown agent, as a function of the nature of the compounds used and of the specific conditions of the work.
The coatings obtained by this process, which are characterised by a rapid hold at ambient temperature, associated with good surface properties, are another subject of the invention.
In the following, a description is given of examples of the implementation of the invention.
Example 1 a) Bituminous aqueous emulsion Emulsification takes place of 650 kg of a mixture 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 a hydrochloride of a diamine (resulting from the action on 4 kg of tallow diamine of 2.6 kg of a 32% by weight aqueous solution of HCI), in a COLAStR' homogeniser, by introducing the bitumen at 130"C and the aqueous phase at 50"C.
b) Breakdown agent It is composed of an aqueous solution containing 10% by weight of sodium hydroxide and 2% by weight of sodium lauryl sulphate.
c) Spreading By means of an emulsion bank equipped with brush jets and situated at a distance of approximately 25 cm from the ground, spreading takes place, at ambient temperature, of 1.8 to 1.9 kg/m2 of the emulsion obtained in accordance with a) on the roadway and simultaneously, at an angle of incidence of 60 to 25 , 50 kg/m2 of breakdown agent solution obtained in accordance with b); 6/10 chippings are then distributed on the ground at a rate of 8 I/m2. The hold of the coating is achieved at a temperature of 15"C in approximately 2 hours; at this time, the resumption of the use of the roadway for traffic may be undertaken.
With the application of the same mode of operation as previously, a monolayer coating will be prepared with double application of chippings with 2.1 to 2.4 kg/m2 of emulsion obtained in accordance with a), and 7 to 9 l/m2 of 10/14 chippings and 4 to 7 l/m2 of 4/6 chippings; the hold will be achieved in approximately 2 hours.
Example 2 Study on the improvement of the quality of the fixing of the chipping Coatings of metal plates were prepared, in the laboratory, by distributing the bituminous aqueous emulsion obtained in accordance with Example 1-a) in the presence, or not in the presence, of the breakdown agent in accordance with 1-b), and by distributing chippings on the coating obtained, in accordance with a conventional technique (adaptation of the Vial it test of overall adhesion to the plate). The percentage of chippings remaining attached to the metallic support plates after the latter had been turned over was measured at different times after covering thereof. The results obtained, which are shown in Table 1, demonstrate that the hold of the emulsion is far more rapid in the presence of breakdown agent.
TABLE 1 % of hold of the emulsion at 22"C * Duration control test 30 min 0% 45% 1 hour 12% 54% 2hours 17% 59% * measured by the ratio of the number of chippings which remained attached to the plate to the total number of chippings distributed.

Claims (5)

1. Process for obtaining surface coatings by the spreading of aqueous emulsions of bitumens, characterized in that the bituminous composition is brought into contact with an agent for breaking down the emulsion.
2. Process according to Claim 1, wherein the bituminous aqueous 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 from 0.2 to 1% by weight of a breakdown agent is discharged in aqueous solution selected from the strong bases, the anionic surfactants or mixtures thereof.
3. Process according to Claim 1 or Claim 2 and in which the emulsion is applied to a surface by means of brush jets and the breakdown agent is simultaneously applied to the surface at an angled incidence between 25 and 60 .
4. Roadway surface coatings, exhibiting rapid hold, characterized in that they are obtained by a process according to any preceeding claims.
5. Process for obtaining surface coatings substantially as hereinbefore particularly described with reference to Figures A and B in the accompanying drawings.
GB08528322A 1984-11-21 1985-11-18 Process for obtaining road surface coatings by the spreading of aqueous emulsions of bitumen, and coatings obtained Expired GB2167975B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8417758A FR2573455B1 (en) 1984-11-21 1984-11-21 PROCESS FOR OBTAINING SURFACE ROAD COATINGS BY SPREADING AQUEOUS BITUMEN EMULSIONS AND COATINGS OBTAINED

Publications (3)

Publication Number Publication Date
GB8528322D0 GB8528322D0 (en) 1985-12-24
GB2167975A true GB2167975A (en) 1986-06-11
GB2167975B GB2167975B (en) 1988-11-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08528322A Expired GB2167975B (en) 1984-11-21 1985-11-18 Process for obtaining road surface coatings by the spreading of aqueous emulsions of bitumen, and coatings obtained

Country Status (16)

Country Link
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)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618350A1 (en) * 1987-07-24 1989-01-27 Applic Derives Asphalte PROCESS FOR CAUSING THE BREAKAGE OF EMULSION USING A BREAKING AGENT
FR2626593A1 (en) * 1988-01-29 1989-08-04 Screg Routes & Travaux Process and device for producing a road covering
FR2695949A1 (en) * 1992-09-18 1994-03-25 Sud Ouest Liants Method for bituminous surface treatment for roads - involves spraying emulsion then spreading chippings and spraying additive on them to break up emulsion round particles forming real skin
WO1994023129A1 (en) * 1993-03-26 1994-10-13 Exxon Research And Engineering Company Bituminous surface construction
WO1995025848A1 (en) * 1994-03-22 1995-09-28 Mark & Mekan Ab A valve device
FR2732369A1 (en) * 1995-03-28 1996-10-04 Colas Sa METHOD AND MACHINE FOR THE IMPLEMENTATION OF A COUPLING LAYER AND ROAD COATING COMPRISING SUCH A LAYER
FR2748283A1 (en) * 1996-05-06 1997-11-07 Routiere Beugnet Method of re-metalling road surfaces
WO1999043890A1 (en) * 1998-02-26 1999-09-02 Antonino Ancione S.P.A. A cold waterproofing, bituminous emulsion, modified with elastomers
GB2392399A (en) * 2002-08-28 2004-03-03 Antonino Ancione S P A Process for the application of a bituminous coating
US10899929B2 (en) 2014-07-10 2021-01-26 Lhoist Recherche Et Development Calcium/magnesium compound slurry for bituminous road material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017228A1 (en) * 1990-05-07 1991-11-14 Emoleum (Australia) Limited Improved bitumen emulsions
FR2662193B1 (en) * 1990-05-21 1992-10-30 Colas Sa DEVICE FOR SPREADING A FLUID MATERIAL, IN PARTICULAR A BITUMINOUS MIXING EMULSION, AND PAVEMENT CONSTRUCTION MACHINE COMPRISING SUCH A DEVICE.
FR2665717B1 (en) * 1990-08-08 1993-08-06 Colas Sa DEVICE FOR SPREADING A FLUID SUBSTANCE AND MACHINE FOR THE SIMULTANEOUS APPLICATION OF SUCH SUBSTANCE AND COATING OF A PAVEMENT.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1167265A (en) * 1966-04-02 1969-10-15 Bayer Ag Process for the Manufacture of Bituminous Insulating Layers
GB1244535A (en) * 1968-09-28 1971-09-02 Bayer Ag Coatings
GB1303598A (en) * 1970-03-06 1973-01-17
GB1383463A (en) * 1972-05-10 1974-02-12 Tremco Mfg Co Method of depositing coagula from bituminous emulsion-rubber latex compositions
GB1531573A (en) * 1975-01-24 1978-11-08 Shell Int Research Method for the formation of bituminous coatings on a substrate

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DE256573C (en) *
DE490082C (en) * 1926-08-20 1930-01-20 Eduard Pree Dipl Ing Process for the production of a gravel road surface using an emulsion of asphalt o.
CH152535A (en) * 1931-02-20 1932-02-15 Ruetgerswerke Ag Process for the preparation of emulsions from tar products.
CH298445A (en) * 1951-02-14 1954-05-15 Zeller & Gmelin Process for the production of building materials suitable for road surfaces.
CH338265A (en) * 1954-02-19 1959-05-15 Bataafsche Petroleum Reversible water-in-oil type emulsion for coating mineral aggregates and other solid material with a thin adherent hydrophobic layer, its manufacture and use
AU421971B2 (en) * 1967-09-13 1972-03-02 Ib. E. Limited Coating with emulsions
DK143034C (en) * 1967-10-04 1981-10-19 Chevron Res SURFACE COATING MATERIAL AND PROCEDURE FOR ITS MANUFACTURING
DE2161705A1 (en) * 1971-01-27 1972-08-10 Marini Off Mec Device for spray mixing of materials
DE2816657C3 (en) * 1978-04-17 1981-11-26 Gebr. Happich Gmbh, 5600 Wuppertal Coat hooks for sliding arrangement on the handle formation of handles to be arranged in vehicles
DD206491A3 (en) * 1982-06-16 1984-01-25 Petrolchemisches Kombinat COLD-PROCESSABLE MIXTURE FOR ROADWORK PURPOSES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1167265A (en) * 1966-04-02 1969-10-15 Bayer Ag Process for the Manufacture of Bituminous Insulating Layers
GB1244535A (en) * 1968-09-28 1971-09-02 Bayer Ag Coatings
GB1303598A (en) * 1970-03-06 1973-01-17
GB1383463A (en) * 1972-05-10 1974-02-12 Tremco Mfg Co Method of depositing coagula from bituminous emulsion-rubber latex compositions
GB1531573A (en) * 1975-01-24 1978-11-08 Shell Int Research Method for the formation of bituminous coatings on a substrate

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618350A1 (en) * 1987-07-24 1989-01-27 Applic Derives Asphalte PROCESS FOR CAUSING THE BREAKAGE OF EMULSION USING A BREAKING AGENT
FR2626593A1 (en) * 1988-01-29 1989-08-04 Screg Routes & Travaux Process and device for producing a road covering
FR2695949A1 (en) * 1992-09-18 1994-03-25 Sud Ouest Liants Method for bituminous surface treatment for roads - involves spraying emulsion then spreading chippings and spraying additive on them to break up emulsion round particles forming real skin
WO1994023129A1 (en) * 1993-03-26 1994-10-13 Exxon Research And Engineering Company Bituminous surface construction
WO1995025848A1 (en) * 1994-03-22 1995-09-28 Mark & Mekan Ab A valve device
EP0736629A1 (en) * 1995-03-28 1996-10-09 Colas S.A. Process and apparatus for applying an adhesive layer and road surface having such a layer
FR2732369A1 (en) * 1995-03-28 1996-10-04 Colas Sa METHOD AND MACHINE FOR THE IMPLEMENTATION OF A COUPLING LAYER AND ROAD COATING COMPRISING SUCH A LAYER
US5893679A (en) * 1995-03-28 1999-04-13 Colas S.A. Process and a machine for the implementation of a bonding layer and road-type coating comprising such a layer
AU721015B2 (en) * 1995-03-28 2000-06-22 Colas S.A. A process and a machine for the implementation of a bonding layer and road-type coating comprising such a layer
FR2748283A1 (en) * 1996-05-06 1997-11-07 Routiere Beugnet Method of re-metalling road surfaces
WO1999043890A1 (en) * 1998-02-26 1999-09-02 Antonino Ancione S.P.A. A cold waterproofing, bituminous emulsion, modified with elastomers
GB2392399A (en) * 2002-08-28 2004-03-03 Antonino Ancione S P A Process for the application of a bituminous coating
US10899929B2 (en) 2014-07-10 2021-01-26 Lhoist Recherche Et Development Calcium/magnesium compound slurry for bituminous road material

Also Published As

Publication number Publication date
CH666924A5 (en) 1988-08-31
CY1474A (en) 1989-07-21
LU86165A1 (en) 1986-03-24
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
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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PE20 Patent expired after termination of 20 years

Effective date: 20051117