DK2148004T3 - Process for making asphalt - Google Patents

Process for making asphalt Download PDF

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Publication number
DK2148004T3
DK2148004T3 DK09008351.0T DK09008351T DK2148004T3 DK 2148004 T3 DK2148004 T3 DK 2148004T3 DK 09008351 T DK09008351 T DK 09008351T DK 2148004 T3 DK2148004 T3 DK 2148004T3
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DK
Denmark
Prior art keywords
granulate
old asphalt
process according
asphalt granulate
old
Prior art date
Application number
DK09008351.0T
Other languages
Danish (da)
Inventor
Frank Wagner
Original Assignee
Benninghoven Gmbh & Co Kg Mülheim
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 Benninghoven Gmbh & Co Kg Mülheim filed Critical Benninghoven Gmbh & Co Kg Mülheim
Application granted granted Critical
Publication of DK2148004T3 publication Critical patent/DK2148004T3/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
    • 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
    • E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
    • 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
    • E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
    • E01C19/1068—Supplying or proportioning the ingredients

Description

The invention relates to a method for the production of asphalt in which white material and old asphalt granulate are processed.
Methods for the production of asphalt are based on the heating of rock material, so-called white material, and on the admixture of additives. From DE 40 35 050 C2, a method for the production of asphalt mixtures is known according to which a heated mixture is transported from an asphalt factory to a satellite factory where it is mixed with molten asphalt to form an asphalt mixture. From EP 0 641 886 A2, a processing drum for heating rock material and recycled asphalt granulate is known, wherein the processing drum provides a simple and cost-effective way of heating large quantities of recycled asphalt granulate and adding the same to the new rock material. Other methods and devices for the production of asphalt are known from WO 2007/103345 A2, from US 6,196,710 B1, from US 4,867,572, and from US 4,600,379 A.
Document WO 2007/103345 A2 discloses a method comprising the features of the preamble of claim 1.
The invention is based on the objective of providing a method for the production of asphalt that prevents fine-grained old asphalt granulate from sticking together.
This objective is attained by the features of claim 1. The gist of the invention is, in a method for the production of asphalt by means of a further processing of white material and old asphalt granulate, to charge the old asphalt granulate with a filler prior to reaching a station for further processing. Suitable stations for further processing may include a dryer drum, a granulate dryer drum, a mixer or a hot elevator. The filler used is preferably dust which, by adhesion, turns a sticky of the asphalt granulate into a relatively dry and pourable material surface. This effect is also referred to as the so-called Panier effect. The filled used for this is the product of a dust extraction device that is part of an asphalt mixing facility, wherein the filler is graded as coarse filler and fine filler depending on its particle size. Furthermore, the filler used for charging the old asphalt granulate may also be produced externally.
Further advantageous embodiments of the invention will emerge from the subclaims.
Further features and details of the invention will emerge from the ensuing description of five embodiments by means of the drawing in which
Fig. 1 to Fig. 5 show schematic views of facilities according to the invention for the production of asphalt according to five exemplary embodiments. A facility 1 shown in Fig. 1 includes a dryer drum 4 at which an injection belt 9 is arranged. Furthermore, a thrower belt 6 is provided in an outlet region 7 of the dryer drum 4. A hot elevator 10 is directly connected to the outlet region 7 of the dryer drum 4. A dust hopper 11 is connected to the thrower belt 6 via a screw conveyor 5. In the facility 1, old asphalt granulate 2 is heated continuously, wherein a filler 3 is continuously added to the old asphalt granulate 3 as well before a heating process takes place in the dryer drum 4. The filler 3 is available as a product of a dust extraction device, which is configured as a filter, in the dust hopper 11. The filler 3 is fed to the old asphalt granulate 2 via the screw conveyor 5, and may further be conveyed by means of all known and suitable conveyor devices such as conveyor belts, vibrating chutes or pneumatic conveyor systems. The old asphalt granulate 2 charged with the filler 3 is fed to a white material 8 via the thrower belt 6 in the outlet region 7 of the dryer drum 4. The white material 8 is conveyed to the dryer drum 4 via the injection belt 9. In the dryer drum 4, a heating of the white material 8 and of the old asphalt granulate 2 and a mixing of the white material 8 with the old asphalt granulate 2 is carried out at the same time. A heated material obtained by mixing the old asphalt granulate 2 charged with the filler 3 with the white material 8 is conveyed to the hot elevator 10 via the outlet region 7 of the dryer drum 4. A second embodiment of the invention will be described hereinafter with reference to Fig. 2. Structurally identical parts are denoted by the same reference numerals as in the first exemplary embodiment to the description of which reference is made. The essential difference with respect to the first embodiment is that an admixture belt 12 is arranged in a centre region of the dryer drum 4. Furthermore, the dust hopper 11 is connected to the dryer drum 4 via the screw conveyor 5, a filler elevator 13 and an admixture ring 14. Contrary to the first exemplary embodiment, the filler 3 is fed to the old asphalt granulate 2 by means of the screw conveyor 5 and the filler elevator 13. The old asphalt granulate 2 charged with the filler 3 is conveyed to the dryer drum 4 via, and via the admixture ring 14. There, the white material 8 and the old asphalt granulate 2 are heated and mixed continuously in the dryer drum 4. Subsequently, this heated and mixed material is conveyed to the hot elevator 10. A third embodiment of the invention will be described hereinafter with reference to Fig. 3. Structurally identical parts are denoted by the same reference numerals as in the first two exemplary embodiments to the description of which reference is made. The essential difference with respect to the first two exemplary embodiments is that the admixture belt 12 is directly connected to an old asphalt granulate elevator 16 the outlet of which is adjoined by a granulate dryer drum 15. The granulate dryer drum 15 is arranged in the facility 1 in addition to the dryer drum 4 and is also referred to as parallel drum. The old asphalt granulate 2 is charged with the filler 3 via the screw conveyor 5 and fed to the granulate dryer drum 15 via the admixture belt 12 and the old asphalt granulate elevator 16. The continuous heating of the white material 8 is performed in the dryer drum 4, the continuous heating of the old asphalt granulate 2 is performed in the granulate dryer drum 15. Contrary to the feeding of the white material 8 into the dryer drum 4, the old asphalt granulate 2 is not fed to the granulate dryer drum 15 at a position that has the greatest distance from a burner of the granulate dryer drum 15 but instead at the position where the burner of the granulate dryer drum 15 is installed. The reason for this is that the old asphalt granulate 2 is relatively more likely to inflame than the white material 8 so when it comes into contact with the burner of the granulate dryer drum 15, the old asphalt granulate 2 is in a cold and damp initial state and not in a dried state. A fourth exemplary embodiment of the invention will be described hereinafter with reference to Fig. 4. Structurally identical parts are denoted by the same reference numerals as in the first three exemplary embodiments to the description of which reference is made. The essential difference with respect to the first three exemplary embodiments is that the old asphalt granulate 2 is fed to the dried white material 8 in the hot elevator 10 directly in a cold and damp initial state without prior heating in the dryer drum 4 or in the granulate dryer drum 15; in the hot elevator 10, it is then heated and dried continuously. The old asphalt granulate 2 is charged with the filler 3 by means of the screw conveyor 5 directly before the old asphalt granulate 2 is fed to the hot elevator 10. A fifth exemplary embodiment of the invention will be described hereinafter with reference to Fig. 5. Structurally identical parts are denoted by the same reference numerals as in the first four exemplary embodiments to the description of which reference is made. The admixture belt 12 is arranged at a feeder of an old asphalt granulate elevator 16. The old asphalt granulate elevator 16 is connected to a mixer 19 via a belt weigher 17 and a chute 18. The essential difference with respect to the first four exemplary embodiments is that the old asphalt granulate 2 is heated discontinuously. To this end, a quantity of the filler 3 corresponding to the asphalt composition is added to the old asphalt granulate 2 via the screw conveyor. The old asphalt granulate 2 charged with the filler 3 is conveyed to the belt weigher 17 via the admixture belt 12 and the old asphalt granulate elevator 16 where the old asphalt granulate 2 charged with the filler 2 is being weighed. Via the chute 18, the cold old asphalt granulate 2 is conveyed to the mixer 19 in which overheated white material 8 is disposed.
Old asphalt granulate 2 is produced by milling old road surfaces. Depending on the milling procedure used, the size of the particle diameters may vary, wherein fine-grained old asphalt granulate 2 distinguishes itself by particle diameters smaller than 10 mm, in particular smaller than 5 mm, and in particular smaller than 2 mm.
The filler 3 produced by dust extraction exhibits particles with diameters of between 0.9 mm and 2.0 mm, in particular 1.5 mm to 2.0 mm, and is therefore referred to as coarse filler. Coarse filler is particularly advantageous for charging the old asphalt granulate 2 since the coarse filler, being a product of dust extraction, is in a heated condition, which facilitates the bonding of the old asphalt granulate 2 to the coarse filler. The old asphalt granulate 2 can also be charged with a so-called fine filler that distinguishes itself by particle diameters of between 0 mm and 0.9 mm, in particular 0.1 mm and 0.9 mm, in particular between 0.5 mm and 0.9 mm. Depending on particular national specifications, the limiting value between fine filler and coarse filler may also be 0.63 mm instead of 0.9 mm.
The method according to the invention for the production of asphalt is based on the idea of adding old asphalt granulate 2 to white material 8, can be used for many known methods for heating old asphalt granulate 2 and is configured such that already existing methods and facilities for the production of asphalt that do not take into consideration the addition of old asphalt granulate 2 can be operated according to the new method by retrofitting them with the respective components.

Claims (14)

1. Fremgangsmåde til fremstilling af asfalt omfattende: opvarmning af hvidt materiale (8) og gammelt asfaltgranulat (2), blanding af det hvide materiale (8) med det gamle asfaltgranulat (2) og fyldning af det gamle asfaltgranulat (2) med et fyldmateriale (3) før fremkomsten til en viderebearbejdningsstation, kendetegnet ved, at - det kolde asfaltgranulat (2) påfyldes en på forhånd vejet mængde af fyldmateriale (3) før opvarmningen.A process for making asphalt comprising: heating white material (8) and old asphalt granulate (2), mixing white material (8) with old asphalt granulate (2) and filling the old asphalt granulate (2) with a filler material (3) prior to arrival at a further processing station, characterized in that - the cold asphalt granulate (2) is filled with a pre-weighed amount of filler material (3) before heating. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at opvarmningen af det hvide materiale (8) og det gamle asfaltgranulat (2) foregår i to adskilte beholdere (4,15).Process according to claim 1, characterized in that the heating of the white material (8) and the old asphalt granulate (2) takes place in two separate containers (4.15). 3. Fremgangsmåde ifølge krav 1, kendetegnet ved, at opvarmningen af det hvide materiale (8) og det gamle asfaltgranulat (2) foregår i en fælles beholder (4).Process according to claim 1, characterized in that the heating of the white material (8) and the old asphalt granulate (2) takes place in a common container (4). 4. Fremgangsmåde ifølge et af kravene 1 til 3, kendetegnet ved, at asfaltgranulatet (2) har en partikeldiameter, som er mindre end 10 mm, især mindre end 5 mm og især mindre end 2 mm.Method according to one of claims 1 to 3, characterized in that the asphalt granulate (2) has a particle diameter of less than 10 mm, especially less than 5 mm and especially less than 2 mm. 5. Fremgangsmåde ifølge et af kravene 1 til 4, kendetegnet ved, at opvarmningen af det gamle asfaltgranulat (2) foregår kontinuerligt.Process according to one of claims 1 to 4, characterized in that the heating of the old asphalt granulate (2) is continuous. 6. Fremgangsmåde ifølge krav 5, kendetegnet ved, at fyldningen af det kontinuerligt opvarmede gamle asfaltgranulat (2) med fyldmaterialet (3) foregår kontinuerligt.Process according to claim 5, characterized in that the filling of the continuously heated old asphalt granulate (2) with the filling material (3) takes place continuously. 7. Fremgangsmåde ifølge et af kravene 1 til 4, kendetegnet ved, at opvarmningen af det gamle asfaltgranulat (2) foregår diskontinuerligt.Process according to one of claims 1 to 4, characterized in that the heating of the old asphalt granulate (2) takes place continuously. 8. Fremgangsmåde ifølge et af kravene 1 til 7, kendetegnet ved, at der som fyldmateriale (3) anvendes støv, som ved fasthængningen på det gamle asfaltgranulat (2) væder dettes klæbrige overflade, således at den med støv vædede overflade på det gamle asfaltgranulat (2) er risledygtigt.Process according to one of Claims 1 to 7, characterized in that dust is used as filler material (3) which, when attached to the old asphalt granulate (2), wets its sticky surface, so that the dust-wetted surface of the old asphalt granulate (2) is rice-resistant. 9. Fremgangsmåde ifølge et af kravene 1 til 8, kendetegnet ved, at fyldmaterialet (3) foreligger som fint fyldmateriale med en partikeldiameter på imellem 0 mm og 0,9 mm, især 0,1 mm til 0,9 mm, især 0,5 mm til 0,9 mm, og som groft fyldmateriale med en partikeldiameter på imellem 0,9 mm og 2,0 mm, især 1,5 mm til 2,0 mm.Method according to one of claims 1 to 8, characterized in that the filler material (3) is present as fine filler material with a particle diameter between 0 mm and 0.9 mm, in particular 0.1 mm to 0.9 mm, especially 0, 5 mm to 0.9 mm, and as coarse filling material having a particle diameter of between 0.9 mm and 2.0 mm, in particular 1.5 mm to 2.0 mm. 10. Fremgangsmåde ifølge et af kravene 1 til 9, kendetegnet ved, at fyldmaterialet (3) er et produkt af en afstøvning i et anlæg (1) til fremstillingen af asfalt.Process according to one of claims 1 to 9, characterized in that the filling material (3) is a product of a dusting in a plant (1) for the production of asphalt. 11. Fremgangsmåde ifølge et af kravene 1 til 10, kendetegnet ved, at det gamle asfaltgranulat (2) er granuleret genanvendt asfalt, som fremstilles ved affræsning af gamle gadebelægninger.Process according to one of claims 1 to 10, characterized in that the old asphalt granulate (2) is granulated recycled asphalt which is produced by milling old street pavements. 12. Fremgangsmåde ifølge et af kravene 1 til 11, kendetegnet ved, at det hvide materiale (8) er et stenmateriale til fremstillingen af asfalt.Process according to one of Claims 1 to 11, characterized in that the white material (8) is a stone material for the production of asphalt. 13. Fremgangsmåde ifølge et af kravene 1 til 12, kendetegnet ved, at det hvide materiale (8) og det gamle asfaltgranulat (2) transporteres imellem genbearbejdningsstationer.Process according to one of Claims 1 to 12, characterized in that the white material (8) and the old asphalt granulate (2) are transported between reworking stations. 14. Fremgangsmåde ifølge krav 13, kendetegnet ved, at genbearbejdningsstationerne er en tørretromle (4), en granulat-tørretromle (15), en blander (19) eller en varmelevator (10).Process according to claim 13, characterized in that the reworking stations are a dryer (4), a granular dryer (15), a mixer (19) or a heat lift (10).
DK09008351.0T 2008-07-23 2009-06-26 Process for making asphalt DK2148004T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008034247A DE102008034247B3 (en) 2008-07-23 2008-07-23 Process for the production of asphalt

Publications (1)

Publication Number Publication Date
DK2148004T3 true DK2148004T3 (en) 2017-06-06

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ID=41167475

Family Applications (1)

Application Number Title Priority Date Filing Date
DK09008351.0T DK2148004T3 (en) 2008-07-23 2009-06-26 Process for making asphalt

Country Status (5)

Country Link
EP (1) EP2148004B1 (en)
DE (1) DE102008034247B3 (en)
DK (1) DK2148004T3 (en)
ES (1) ES2625297T3 (en)
PL (1) PL2148004T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2987631B1 (en) * 2012-03-05 2014-10-31 Famaro COATING CENTRAL AND METHOD FOR PRODUCING COILS, IN PARTICULAR FOR ROAD COVERINGS

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600379A (en) 1985-09-09 1986-07-15 Elliott E J Drum heating and mixing apparatus and method
US4867572A (en) * 1987-09-08 1989-09-19 Astec Industries, Inc. Asphalt plant with fixed sleeve mixer
DE3911425A1 (en) * 1989-04-07 1990-10-11 Deutsche Asphalt Gmbh METHOD AND DEVICE FOR THE ENVIRONMENTALLY FRIENDLY PREPARATION OF ASPHALTIC MATERIAL WITH REUSED OLD ASPHALT
DE4035050C2 (en) 1990-11-05 1998-09-17 Benninghoven Gmbh & Co Kg Process for making asphalt mixes
DE4320664A1 (en) * 1993-06-22 1995-01-05 Gibat Ohl Ingenieurgesellschaf Process for producing asphalt using heated, fresh asphalt and heated, worked-up reclaimed asphalt
DE9313422U1 (en) 1993-09-07 1993-12-02 Benninghoven Gmbh & Co Kg Processing drum for heating rock material and granulated asphalt
US6196710B1 (en) 1999-11-26 2001-03-06 Astec Industries, Inc. Dust distributor for asphalt mixing machine
DE10065174C1 (en) * 2000-12-23 2002-06-13 G & P Ingenieurgesellschaft Fu Modified bitumen production, for use as binder in asphalt mixtures, comprises continuous supply of additives, e.g. waste plastics, to hot liquid bitumen in jet apparatus
US7566162B1 (en) 2006-03-07 2009-07-28 Astec, Inc. Apparatus and method for a hot mix asphalt plant using a high percentage of recycled asphalt products

Also Published As

Publication number Publication date
ES2625297T3 (en) 2017-07-19
DE102008034247B3 (en) 2009-12-17
EP2148004A2 (en) 2010-01-27
PL2148004T3 (en) 2017-08-31
EP2148004A3 (en) 2012-09-26
EP2148004B1 (en) 2017-02-22

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