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AssigneeColas
InventorsNelson K. WESENBERG, Jean-Paul FORT
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In a method for renovating a roadway, a first tack coat including a bitumen emulsion, a second coat of fibres and then a third surface coat that is a “clean” bitumen emulsion or includes an anhydrous asphalt binder, is spread by a spreading machine from bottom to top and overlaid on the milled or planed roadway. The fibres are sprayed onto the tack coat and the sprayed fibres having a maximum length of 12 cm, an asphalt mix being subsequently spread over the surface coat, the residual binder of the “clean” bitumen emulsion having a penetrability of less than 40 dmm and a ball-ring temperature greater than 50° C., the ‘clean’ bitumen emulsion including between 30% and 70% bitumen, between 30% and 70% water, and between 0.1% and 10% surfactants, stabilisers and/or additives, the percentages being by weight. The application also relates to a spreading machine.
A method for renovating a vehicle traffic pavement, in which, in a first step, a first bituminous coat, called the tack coat, then a second coat of fibres, then a third bituminous coat, called the surface coat, are spread in a single passage of a spreading machine, from bottom to top and superimposed to each other on the pavement, fibres being sprayed on the tack coat and the sprayed fibres having a maximum length of 12 cm, wherein the surface coat is a coat of “clean” (“trackless”) bitumen emulsion or including an anhydrous bituminous binder,
A spreading machine for the simultaneous spreading of fibres and bitumen emulsion for a traffic pavement renovation method, the machine having a reserve of fibres, a bitumen emulsion tank and a bitumen emulsion and fibre spreading system, the bitumen emulsion and fibre spreading system including a first bitumen emulsion spreading boom, a fibre spraying device and a second bitumen emulsion spreading boom, the booms including nozzles, the first boom, the fibre spraying device and the second boom being arranged in such a way as to the spread successively and superimposed to each other, during the travel of the machine and a single pass, a first coat called the tack coat, consisted of the bitumen emulsion sprayed by the first boom, then a second coat of fibres, sprayed by the fibre spraying device, said sprayed fibres having a maximum length of 12 cm, then a third coat called the surface coat consisted of the bitumen emulsion sprayed by the second boom, the bitumen emulsion tank containing a “clean” (“trackless”) bitumen emulsion in such a way that the fibres can be taken between two coats of “clean” (“trackless”) bitumen emulsion, the “clean” (“trackless”) bitumen emulsion containing so-called “hard” bitumen, the “clean” (“trackless”) bitumen emulsion providing a residual binder once the emulsion breaking obtained, the residual binder of the “clean” (“trackless”) bitumen emulsion having the following properties:
Dependencies are inferred from the claim text.