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
  • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
  • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
  • E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C7/00—Coherent pavings made in situ
  • E01C7/08—Coherent pavings made in situ made of road-metal and binders
  • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
  • E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping

Definitions

• the invention relates to a method of cold milling the surface layers of the pavement covering in which the milled material is recovered with a view to its reuse. It also relates to a machine implementing said process and the use of the milled material obtained according to this process.
• Maintenance of the road surface may, among other things, use so-called cold milling techniques.
• the surface layers of the coating are removed by milling, with a view to lowering and regularizing the level of the surface, thus preparing it to receive a new coating.
• resulting materials can then be either eliminated or reused, if necessary after subsequent storage and reprocessing.
• precise reuse of the resulting materials for example as a foundation layer or for pavement adjustment, it is then necessary to subject one or more additional treatments to the milled material, so that it acquires the quality compaction required.
• Such processing can only be carried out at the cost of additional operations and using ancillary facilities, which increase the total cost of all operations accordingly.
• an aqueous composition such as an aqueous solution or suspension or simply water.
• an organic composition such as a solvent or a mixture of organic solvents, for example toluene, heavy or light aliphatic hydrocarbons or other petroleum distillation residues.
• organic composition it is also advantageous to use a binder or mixture of anhydrous binders, such as lacquers or so-called "cut-back" binders.
• an aqueous organic composition such as an emulsion of bitumen or tar for example.
• the nature of the liquid composition will in fact depend on the use assigned to the milling material, in accordance with current practices.
• the quantity of liquid composition to be incorporated into the milling material is calculated as a function of the various parameters making it possible to define the milling material: this quantity will in particular be a function of the mass of milled material collected, of the particle size curve of said material , the angularity of the grains constituting said material and the compaction energy accepted according to standard SN 670 330 a (PROCTOR test or similar).
• the quantity of liquid composition thus calculated will be that which makes it possible to obtain a milled material with an optimum content of compacting liquid.
• additional mixing can be carried out in order to obtain optimal homogenization of the material mixed with the liquid composition.
• Such mixing can be carried out on the same milling site, immediately after the incorporation of the liquid composition or during a separate step, in an appropriate installation.
• the method of the invention can be suitably implemented using a cold milling machine comprising a device for storing the composite. tion, a device for bringing the liquid composition into the milling zone and a device for dosing the liquid-incorporated composition into the milled material.
• any known means can be used, such as a tank for example, fixed on the machine itself or on an auxiliary vehicle, the device bringing the liquid composition to the desired level then being arranged accordingly.
• a metering pump is preferably used, controlled by the speed of advance of the machine. The control of such a pump can be achieved using any suitable known means, for example using an independent tachometer, a tachometer connected to the transmission system of the machine or the milling element of said machine, or through the PTO of the milling element of the machine.
• the pump flow (Q) is then determined as follows:
• the milled material resulting from the process according to the invention can be reused immediately or after intermediate storage, in particular for the preparation of foundation layers, adjustment layers or wear layers of roadways.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Road Repair (AREA)
• Road Paving Structures (AREA)
• Road Signs Or Road Markings (AREA)
• Heat Treatment Of Steel (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=4295324

Family Applications (1)

Country Status (4)

Cited By (10)

Families Citing this family (2)

Family Cites Families (3)

• 1984
  • 1984-11-20 CH CH5541/84A patent/CH661953A5/fr not_active IP Right Cessation
• 1985
  • 1985-11-18 EP EP85810547A patent/EP0182748B1/de not_active Expired - Lifetime
  • 1985-11-18 DE DE8585810547T patent/DE3575752D1/de not_active Expired - Lifetime
  • 1985-11-18 AT AT85810547T patent/ATE50012T1/de not_active IP Right Cessation

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