EP0760882B1 - Procede et dispositif pour le melange a froid de materiau de revetement routier - Google Patents

Procede et dispositif pour le melange a froid de materiau de revetement routier Download PDF

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Publication number
EP0760882B1
EP0760882B1 EP95923652A EP95923652A EP0760882B1 EP 0760882 B1 EP0760882 B1 EP 0760882B1 EP 95923652 A EP95923652 A EP 95923652A EP 95923652 A EP95923652 A EP 95923652A EP 0760882 B1 EP0760882 B1 EP 0760882B1
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EP
European Patent Office
Prior art keywords
aggregate
particle size
bitumen emulsion
mixed
screen
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.)
Expired - Lifetime
Application number
EP95923652A
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German (de)
English (en)
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EP0760882A1 (fr
Inventor
Leif Lennart Persson
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.)
LEIF PERSSON PLANT I LOMMA AB
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LEIF PERSSON PLANT I LOMMA AB
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Publication of EP0760882A1 publication Critical patent/EP0760882A1/fr
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Publication of EP0760882B1 publication Critical patent/EP0760882B1/fr
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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
    • E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
    • E01C19/1045—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers the mixture being discharged continuously
    • 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

Definitions

  • the present invention relates to a method and a device for cold mixing of road surfacing material.
  • Hot mixing requires stationary plants, in which a bituminous binder and gravel material are mixed during heating.
  • the road surfacing material must then be transported to the road which is to be coated.
  • WO A1 83/00700 discloses a batchwise method and an apparatus for hot mixing of asphalt concrete.
  • heated aggregate is divided into three different particle sizes by screening.
  • the coarse-grained portion (> 3 mm) is mixed with a hot bituminous binder.
  • the hot bituminous binder covers the surface of the particles of the coarse-grained portion.
  • a filler ( ⁇ 0.1 mm) is added to increase the thickness of the bituminous film on the particles of the coarse-grained portion.
  • the fine-grained portion ( ⁇ 2 mm) added, which thus has a greater particle size than the filler and which is added to the thickened layer of bitumen on the particles of the coarse-grained portion.
  • the adding of the filler results, in hot mixing, in the particles of the fine-grained portion more easily adhering to the particles already coated with the bituminous binder.
  • a problem in today's hot mixing is the large amounts of diesel oil, solvent and dust emitted to the surroundings during heating and working of the road surfacing material.
  • the increasing cost for transporting the heated road surfacing material is an additional problem.
  • US-A-4,974,993 discloses a method and a device for renewing a road surface.
  • the road material is first scarified and screened in order to separate particles > 35 mm from particles having the size of 0-35 mm.
  • the reason for such screening is that subsequently the material having a particle size of > 35 mm is to be crushed to a smaller size.
  • the particles of the two different portions, which are then united, thus have essentially the same size range.
  • a solvent and a bitumen emulsion are then added to the crushed portion, which is then mixed with the portion that has not been subjected to crushing.
  • WO A1 87/03317 discloses a method and an apparatus for mixing gravel material and a bitumen emulsion.
  • the gravel material is separated into two portions.
  • the two different portions are separately sprayed with the bitumen emulsion and are then united.
  • the two portions sprayed with bitumen emulsion are then mixed together by letting the material fall freely onto strongly inclined baffles. Any remaining bitumen emulsion is added to the total mix of the two portions before being discharged from the apparatus.
  • One object of the present invention is to provide a road surfacing material without any problems of emission of various chemicals and dust.
  • a further object is to provide a road surfacing material which is of uniform composition after cold mixing and which, when being spread, does not cause the forming of lumps and the coming-loose of stones.
  • the present invention relates to a method and a device for continuous cold mixing of road surfacing material.
  • Aggregate is supplied to a hopper, weighed on a belt weigher and conveyed to a screen to be separated into different size ranges.
  • the different portions are then supplied to a compulsory mixer in which they are cold mixed with bitumen emulsion.
  • the aggregate is screened continuously into at least three portions which are supplied to the compulsory mixer via different inlets.
  • the portion having the greatest particle size is first mixed with an excess of bitumen emulsion for this portion.
  • Each aggregate portion of successively decreasing particle size is then separately mixed with an excess of bitumen emulsion for that aggregate portion at the same time as it is successively mixed with the aggregate portion/s already mixed with bitumen and having a greater particle size.
  • the aggregate portion/s having the smallest particle size/s is/are mixed with the aggregate portions already mixed with bitumen, without additional bitumen emulsion being supplied separately to this/these aggregate portion/s having the smallest particles.
  • Bitumen emulsion is supplied via nozzles which are arranged in the vicinity of the inlets for the aggregate portion/s having the greatest particle size/s, no nozzle being arranged adjacent the inlet for the aggregate portion/s having the smallest particle size/s.
  • the advantage of the present invention is that a road surfacing material of uniform composition is obtained, which, when being spread, yields a road surface of high and uniform quality, without problems of lumps being formed and stones coming loose.
  • aggregate new aggregate in the form of crushed stones and recovery masses, i.e. scarified masses, having a predetermined size distribution.
  • Fig. 1 is a principle sketch of a preferred embodiment of the entire inventive device
  • Fig. 2 is a principle sketch of an enlarged portion of a preferred embodiment of the screening and mixing device according to the invention.
  • the embodiment of the inventive device as illustrated in Fig. 1 comprises a hopper 1 whose lower part is provided with a conveyor belt 2. Under the discharge end of the conveyor belt 2, a belt weigher 3 is arranged. Adjacent the belt weigher 3, there is a further conveyor belt 4. The discharge end of this conveyor belt 4 opens into an inlet 5 of a screen 6. Under the screen 6, a compulsory mixer 7 is arranged. Fig 2 is an enlarged longitudinal section of the screen 6 and the compulsory mixer 7. The screen comprises two different grading screens 8a, 8b which open into different inlets 9a, 9b of the compulsory mixer 7.
  • the compulsory mixer 7 there are a number of nozzles 10a, 10b, 10c and an agitator 11, in which three of four agitator blades 12 propel the material in the direction of arrow 13, whereas the fourth agitator blade 12 propels the material in the opposite direction.
  • the aggregate In the continuous cold mixing of the road surfacing material, the aggregate is first supplied to the hopper 1. Then the aggregate is conveyed continuously to the belt weigher 3 which registers the weight of the aggregate which is to be supplied to the screen 6 and the compulsory mixer 7. Subsequently, the aggregate is conveyed to the inlet 5 of the screen 6. Now the aggregate is discharged and falls onto the grading screen 8a which separates the smallest particles. The largest particles thus do not pass through this grading screen 8a but roll along this screen into the inlet 9a, in which the particles are mixed with an excess of bitumen emulsion for this portion, said bitumen emulsion being discharged from the nozzle 10a in the vicinity of the inlet 9a.
  • the particles that have passed through the two grading screens are supplied to the compulsory mixer over a longer distance and are mixed with the other portions of greater particle size, which have already been mixed with an excess of bitumen emulsion. From the nozzle 10c, the remaining bitumen emulsion is then supplied that is required for the total road surfacing material to have the correct consistency.
  • bitumen emulsion it is not always necessary to add any remaining bitumen emulsion via the nozzle 10c. It may also happen that all the bitumen emulsion has been supplied before adding the aggregate portion/s having the smallest particle size.
  • the added quantity of bitumen emulsion in the different nozzles 10a, 10b, 10c is controlled by the measured input weight of the aggregate that is measured on the belt weigher 3.
  • the proportions of the output quantities in the different nozzles are controlled on the basis of the known size distribution of the aggregate.
  • bitumen emulsion When the largest particles are first mixed with an excess of bitumen emulsion, bitumen emulsion is immediately deposited and adheres to the large particles. Since there is an excess of bitumen emulsion around the large particles, the fine material adheres to these stones and there will be a minimum of separation.
  • the ready-mixed road surfacing material is uniform, and the quality of the final road surface will be uniform and high.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (5)

  1. Procédé de mélange à froid d'un matériau de couche de surface de route, comprenant des étapes de transmission d'un agrégat à une trémie, de pesée de l'agrégat sur une bascule à courroie et de son transport vers un crible afin qu'il soit séparé en fractions granulométriques différentes, dans lequel les fractions différentes sont transmises à un mélangeur obligatoire dans lequel elles sont mélangées à froid avec une émulsion de bitume, caractérisé par les étapes suivantes :
    la séparation continue de l'agrégat, avant le mélange avec l'émulsion de bitume, en au moins trois fractions dans le crible,
    le mélange ultérieur de la fraction ayant les plus grosses particules avec un excès d'émulsion de bitume correspondant à cette fraction,
    le mélange séparé de chaque fraction d'agrégat de dimension particulaire diminuant progressivement, sauf la fraction ou les fractions d'agrégat ayant la plus petite ou les plus petites dimensions particulaires, toujours avec un excès d'émulsion de bitume pour cette fraction d'agrégat, avec mélange successif avec la fraction ou les fractions d'agrégat déjà mélangées avec du bitume et ayant une plus grande dimension particulaire, et
    le mélange ultérieur de la fraction ou des fractions d'agrégat ayant la dimension ou les dimensions particulaires les plus petites aux fractions d'agrégat antérieurement mélangées à du bitume, sans transmission séparée d'émulsion supplémentaire de bitume à cette fraction ou ces fractions d'agrégat ayant les particules les plus petites.
  2. Procédé selon la revendication 1, caractérisé en ce que l'émulsion restante de bitume qui est nécessaire pour l'obtention de la consistance convenable du matériau total de couche de surface de route est ajoutée et mélangée au matériau de couche de surface de route après que la fraction ou les fractions d'agrégat de plus petite dimension particulaire ont été transmises.
  3. Procédé selon la revendication 1, caractérisé en ce que toute l'émulsion de bitume est ajoutée avant le mélange de la fraction ou des fractions d'agrégat ayant la dimension particulaire la plus petite.
  4. Appareil de mélange continu à froid d'un matériau de couche de surface de route, contenant un agrégat et une émulsion de bitume, l'appareil comprenant une trémie (1) destinée à l'agrégat, un crible (6), un mélangeur obligatoire (7), une courroie transporteuse (2) destinée au transport de l'agrégat de la trémie (1) au crible (6), et une bascule à courroie (3) destinée à peser l'agrégat transmis par la trémie (1) au crible (6), le crible (6) étant placé au-dessus du mélangeur obligatoire (7), caractérisé en ce que le crible (6) est destiné à séparer l'agrégat évacué de la trémie (1) en au moins trois fractions ayant des dimension particulaires différentes avant transmission de l'agrégat au mélangeur obligatoire (7), en ce que le mélangeur obligatoire (7) a des entrées différentes (9a, 9b) pour les fractions séparées dans le crible (6) en fonction de la dimension particulaire, et en ce que des buses (10a, 10b) d'émulsion de bitume sont placées au voisinage au moins des entrées (9a, 9b) de la fraction ou des fractions ayant la dimension ou les dimensions particulaires les plus grandes, alors que de préférence aucune buse n'est placée près de l'entrée de la fraction ou des fractions ayant la dimension ou les dimensions particulaires les plus petites.
  5. Dispositif selon la revendication 4, caractérisé en ce qu'une buse (10c) est placée après l'entrée de la fraction ayant la plus petite dimension particulaire.
EP95923652A 1994-06-27 1995-06-27 Procede et dispositif pour le melange a froid de materiau de revetement routier Expired - Lifetime EP0760882B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9402263A SE502772C2 (sv) 1994-06-27 1994-06-27 Sätt och anordning för kallblandning av vägbeläggningsmaterial
SE9402263 1994-06-27
PCT/SE1995/000785 WO1996000324A1 (fr) 1994-06-27 1995-06-27 Procede et dispositif pour le melange a froid de materiau de revetement routier

Publications (2)

Publication Number Publication Date
EP0760882A1 EP0760882A1 (fr) 1997-03-12
EP0760882B1 true EP0760882B1 (fr) 2002-04-10

Family

ID=20394535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95923652A Expired - Lifetime EP0760882B1 (fr) 1994-06-27 1995-06-27 Procede et dispositif pour le melange a froid de materiau de revetement routier

Country Status (8)

Country Link
EP (1) EP0760882B1 (fr)
AT (1) ATE216008T1 (fr)
AU (1) AU2813395A (fr)
DE (1) DE69526341D1 (fr)
NO (1) NO307389B1 (fr)
PL (1) PL178217B1 (fr)
SE (1) SE502772C2 (fr)
WO (1) WO1996000324A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102367645A (zh) * 2011-11-07 2012-03-07 中煤建筑安装工程公司第六十九工程处 灰土拌和机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849873B1 (fr) * 2003-01-14 2005-11-04 Famatec Melangeur pour la fabrication d'un produit enrobe
CN1683715B (zh) * 2004-04-14 2013-07-17 卡尔·根纳·奥尔森 增加由间歇操作装置混合的沥青铺路料粘度的方法和设备
ITBO20130040A1 (it) * 2013-01-30 2014-07-31 Mauro Albini Procedimento per il riempimento di materassi bituminosi per ancoraggio e zavorramento di condotte sottomarine.
CN104452539B (zh) * 2014-12-05 2017-01-04 江苏云端重工科技有限公司 一种节能环保的路用旧沥青混合料油石分离生产装置
CN104452537B (zh) * 2014-12-05 2017-01-04 江苏云端重工科技有限公司 一种节能环保的路用旧沥青混合料喂料装置
CN108951368B (zh) * 2018-09-05 2020-09-29 三一汽车制造有限公司 沥青搅拌站的自动配料方法及自动配料系统和沥青搅拌站

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3265423D1 (en) * 1981-08-25 1985-09-19 Karl Gunnar Ohlson Method and apparatus for making asphalt concrete
NO157510C (no) * 1985-11-29 1988-03-30 Nodest Vei As Fremgangsmaate og anordning for blanding av grusmaterialer og bitumen.
IT8819093A0 (it) * 1988-01-15 1988-01-15 Wirtgen Macchine Srl Procedimento di rigenerazione di un manto stradale in conglomerato bituminoso con applicazione a freddo del materialedi ricoprimento riciclato.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102367645A (zh) * 2011-11-07 2012-03-07 中煤建筑安装工程公司第六十九工程处 灰土拌和机

Also Published As

Publication number Publication date
PL317966A1 (en) 1997-05-12
AU2813395A (en) 1996-01-19
NO963832L (no) 1996-09-13
SE502772C2 (sv) 1996-01-08
SE9402263D0 (sv) 1994-06-27
SE9402263L (sv) 1995-12-28
ATE216008T1 (de) 2002-04-15
PL178217B1 (pl) 2000-03-31
NO307389B1 (no) 2000-03-27
DE69526341D1 (de) 2002-05-16
EP0760882A1 (fr) 1997-03-12
WO1996000324A1 (fr) 1996-01-04
NO963832D0 (no) 1996-09-13

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