EP1713977B1 - Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers usages, notamment d'enrobes usages a recycler - Google Patents

Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers usages, notamment d'enrobes usages a recycler Download PDF

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Publication number
EP1713977B1
EP1713977B1 EP05717706.5A EP05717706A EP1713977B1 EP 1713977 B1 EP1713977 B1 EP 1713977B1 EP 05717706 A EP05717706 A EP 05717706A EP 1713977 B1 EP1713977 B1 EP 1713977B1
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EP
European Patent Office
Prior art keywords
heating
recycled
road materials
chamber
coated road
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.)
Active
Application number
EP05717706.5A
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German (de)
English (en)
French (fr)
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EP1713977A1 (fr
Inventor
Émile Lopez
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Fenixfalt
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Fenixfalt
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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
    • 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
    • E01C19/02—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 preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E01C19/1036—Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
    • 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
    • E01C19/02—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 preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • 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
    • E01C19/02—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 preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/109—Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow

Definitions

  • the present invention relates to a method and a device for heating road asphalt, in particular used asphalt for recycling.
  • the manufacture of asphalt mix includes a first step of processing aggregates.
  • These aggregates are of different particle sizes and mixed in suitable proportions to obtain a base of aggregates studied according to the coating to be produced.
  • the aggregates must be free of water and facilities take advantage of the rise in temperature required for this coating to dry the aggregates in a preliminary step.
  • One of the means for heating these aggregates is to use a rotary drum type oven, inclined, with a burner that emits a flame, this preferably against the flow of aggregates flow, the displacement of the aggregates being obtained by a suitable inclination of the drum .
  • a suitable rotation and fins and other stirring means disposed on the internal walls of said drum to obtain the proper speed of movement and the desired brewing.
  • the burner is fed with liquid or gaseous petroleum fuel and the flame generated is in profile adapted for propagation along the longitudinal axis of the drum.
  • the aggregates are thus subjected to heating by the various transmission means: convection, conduction and radiation.
  • hot aggregates are then optionally sieved and stored and then metered and stirred in kneaders in the presence of hot new bitumen otherwise preserved in order to coat them and obtain a mix ready to be used.
  • the coating operation is carried out in the final part of the heating drum, before leaving.
  • addition fines are added in addition to recovery fines after filtration of the heating gases at the time of coating so as to obtain more compact asphalt layers.
  • the mix thus prepared is then deposited on a prepared surface to receive it and it is compacted energetically before cooling. During this cooling step, the bitumen acts as a cohesion and bonding agent.
  • the hot recycling of asphalt mixes consists in using for a part or even all road costs.
  • These recovered mixes consist of isolated aggregates but also agglomerates whose elements are strongly bound by bitumen.
  • the analysis of the asphalt to be recycled indicates the granulometry of the mixture, the nature and the content of the bitumen present. The knowledge of these parameters will allow complementary bitumen supply operations and / or specific additives as well as additional new aggregates and / or correctors.
  • the problem is the treatment of recycled asphalt because it is necessary to bring to temperature aggregates that are already coated with bitumen and which are in the form of small or large particles isolated or in the form of agglomerates with bitumen contained within even of these agglomerates.
  • the flame which is of the order of 1100 ° C. at the burner outlet, propagates while maintaining 900 ° C. at its end.
  • the gases then pass 700 ° C outside the flame zone to fall to about 200 ° C, that is to say 50 ° C above the temperature to be reached within the same asphalt.
  • the fines present are entrained with the gaseous effluents.
  • the small size and their limited mass induce a very rapid temperature rise compared to other aggregates and thus a quick and easy detachment of the support.
  • Recycling must be able to be applied as well from production units established in a fixed place, from dismountable and mobile installations as for units operating directly on the roadway to be treated. For the latter operating by continuous reprocessing on costs also produced continuously, the problems mentioned above are intensified, especially the rejections. Similarly with the devices heating the surface of the roadway to be recycled, it is difficult to achieve diffusion in the thickness of the asphalt layer due to poor heat transfer and degradation consequences of the bitumen.
  • a document DE-B-2916187 aims to solve some problems including the transfer of used asphalt through conveyors stacked superimposed into each other successively. Nevertheless, the The method does not provide heating at two temperatures in two modules in order to treat the different compounds of bitumens according to their degree of volatility.
  • This device provides either a heating with heating conveyor soles or a flame heating but no radiant heating on top of used road asphalt is provided to refine the heating temperature of each sole or part of hearth.
  • the present invention proposes solutions to overcome the problems mentioned in the preamble and uses heating means by radiant panels with a particular arrangement for illustrating the method and provide a solution in terms of device, satisfactory but not limiting.
  • the method according to the present invention consists in treating asphalt mixes in a device equipped with radiant heating means by panels.
  • milled mixes are used for the description of the description, but also the mixes resulting from mechanical block and crushed shrinkage.
  • radiant heating panels used cover any surface arrangement capable of emitting radiation leading to radiant heating.
  • the maximum point temperature reached can not exceed the deterioration temperature of the bitumens as will be indicated below.
  • the aggregate mixture aggregate has a specific surface area of 15 to 20 m 2 per kilogram with about 50 grams of bitumen, which leads to thicknesses of bitumen films of a few microns.
  • fractions of mineral elements small fine and very fine. These fractions concentrate a greater quantity of bitumen due to differences in specific surface area.
  • the method also consists of mechanical conveying preferentially by gravity but also by forced conveying and with vibrations. These vibrations, in their emission, will have at least one vertical component, preferably with a high amplitude, so as to allow a regular reversal of the grains. This change of orientation allows a homogeneity of presentation of the entire surface of each grain in front of the infrared radiation of the radiant heating means.
  • bitumen is not exposed in an extreme way to the air and therefore to the oxygen it contains, which can cause accelerated oxidation and aging.
  • the associated device is represented on the figure 1 . It comprises a first enclosure 10 in which conveyors or transfer belts 12 are arranged. This enclosure is of substantially parallelepipedal shape in this embodiment to be the simplest.
  • the device In the case of mobile machines, the device is necessarily the road gauge to allow movement and positioning in the immediate vicinity of construction sites. This same limitation to the road gauge is applicable to mobile machines moving continuously along the site to work the costs as and when continuous.
  • the limitation of the size of the device and the need for a sufficient residence time of the mixes generate constraints.
  • transfer mats arranged one below the other, these mats being inclined or horizontal and vibrated by any means 14 adapted to vibration and for example unbalance motors.
  • heating means of radiant type in the form of panels 18. The power, the distribution and the power supply means must be adapted to the processing capacity.
  • the materials to be treated contain a certain amount of water that must be removed and the residence time
  • the heating power are parameters to be taken into account also when sizing the installation.
  • the temperature of the asphalt to be reached at the outlet is of the order of 105 to 130 ° C. so as to bring the bitumen into the viscous state and cause complete evaporation of the water and completely dry the introduced materials.
  • the method then provides a second step which consists of bringing the mix to the final working temperature, ie 160 to 220 ° C, into a second module.
  • the grains and agglomerates derived from the first module are preferably continuously introduced into means for agglutinating fine elements, grains and agglomerates. The fines ensure cohesion.
  • the heat output is modified to fill the heat sink and reach the desired temperature.
  • the second module presented in figure 2 is substantially identical in design to the first module and the identical elements bear the same references with a "".
  • the mixes resulting from this second module can be composed of 100% of materials to be recycled. It is necessary to add regeneration additives of the old bitumen, this operation to be carried out in a kneader, in a known manner. These additives are preheated and dosed in an amount related to the mass flow rate of recycled mixes in a continuous production unit or a mass of previously weighed mixes before introduction into the mixer for a discontinuous unit.
  • the mixes from this second module can be recycled with a supply of virgin aggregates which are introduced together with the asphalt used in the first module.
  • This virgin material is also prepared in a known manner.
  • bitumen supplied by the used asphalt In addition to the bitumen supplied by the used asphalt, it is added regeneration additives and new bitumen as well as filler.
  • the mix including all or part of the recycled mix is ready for use.
  • the central cylinder 100 receives heating means 124, for example a burner 126 using liquid fuel.
  • heating means 124 for example a burner 126 using liquid fuel.
  • the flue gases are evacuated in known manner at the upper end 128 of the central cylinder, the burner being arranged at the bottom.
  • the mixes are introduced into the space between the two cylinders, in the upper part and flow by gravity downwards.
  • the rotation ensures the presentation of all the faces of the grains to the infrared radiation emitted by the outer wall of the central cylinder.
  • the radiating surfaces are curved and can be equipped with any suitable mixing means.
  • the methods and devices according to the present invention make it possible to solve the problems posed by the recycling of old mixes while respecting the environmental constraints.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Processing Of Solid Wastes (AREA)
  • Road Paving Structures (AREA)
  • Working-Up Tar And Pitch (AREA)
EP05717706.5A 2004-02-09 2005-02-07 Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers usages, notamment d'enrobes usages a recycler Active EP1713977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450225A FR2866037B1 (fr) 2004-02-09 2004-02-09 Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers, notamment d'enrobes usages a recycler
PCT/FR2005/050075 WO2005075742A1 (fr) 2004-02-09 2005-02-07 Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers, notamment d'enrobes usages a recycler

Publications (2)

Publication Number Publication Date
EP1713977A1 EP1713977A1 (fr) 2006-10-25
EP1713977B1 true EP1713977B1 (fr) 2016-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05717706.5A Active EP1713977B1 (fr) 2004-02-09 2005-02-07 Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers usages, notamment d'enrobes usages a recycler

Country Status (6)

Country Link
US (1) US9045867B2 (pt)
EP (1) EP1713977B1 (pt)
ES (1) ES2598130T3 (pt)
FR (1) FR2866037B1 (pt)
PT (1) PT1713977T (pt)
WO (1) WO2005075742A1 (pt)

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MX2008013924A (es) * 2008-09-22 2010-05-03 Angelo Benedetti Inc Aparato para reciclar asfalto.
US8562247B2 (en) 2009-01-02 2013-10-22 Heatwurx, Inc. Asphalt repair system and method
US8556536B2 (en) 2009-01-02 2013-10-15 Heatwurx, Inc. Asphalt repair system and method
US8801325B1 (en) 2013-02-26 2014-08-12 Heatwurx, Inc. System and method for controlling an asphalt repair apparatus
US9416499B2 (en) 2009-12-31 2016-08-16 Heatwurx, Inc. System and method for sensing and managing pothole location and pothole characteristics
RU2576540C1 (ru) * 2011-12-03 2016-03-10 Е-Мак Макине Инсаат Тиджарет Ве Санайи А.С. Система рециклинга асфальта и способ производства нового слоя асфальта из асфальта, который необходимо повторно использовать
USD700633S1 (en) 2013-07-26 2014-03-04 Heatwurx, Inc. Asphalt repair device
FR3067100A1 (fr) * 2017-06-02 2018-12-07 Sticks Management Systeme et procede de sechage d’articles en bois pour l’industrie agro-alimentaire

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Also Published As

Publication number Publication date
WO2005075742A1 (fr) 2005-08-18
EP1713977A1 (fr) 2006-10-25
ES2598130T3 (es) 2017-01-25
PT1713977T (pt) 2016-10-25
US9045867B2 (en) 2015-06-02
US20070172313A1 (en) 2007-07-26
FR2866037B1 (fr) 2006-04-28
FR2866037A1 (fr) 2005-08-12

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