EP0925406B1 - Agregats pour surfaces destinees a la circulation - Google Patents

Agregats pour surfaces destinees a la circulation Download PDF

Info

Publication number
EP0925406B1
EP0925406B1 EP97942802A EP97942802A EP0925406B1 EP 0925406 B1 EP0925406 B1 EP 0925406B1 EP 97942802 A EP97942802 A EP 97942802A EP 97942802 A EP97942802 A EP 97942802A EP 0925406 B1 EP0925406 B1 EP 0925406B1
Authority
EP
European Patent Office
Prior art keywords
aggregate
bitumen
active substance
grain size
grains
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
EP97942802A
Other languages
German (de)
English (en)
Other versions
EP0925406A1 (fr
Inventor
Wilhelm Kämereit
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0925406A1 publication Critical patent/EP0925406A1/fr
Application granted granted Critical
Publication of EP0925406B1 publication Critical patent/EP0925406B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E01C11/00—Details of pavings
    • E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
    • E01C11/245—Methods or arrangements for preventing slipperiness or protecting against influences of the weather for preventing ice formation or for loosening ice, e.g. special additives to the paving material, resilient coatings

Definitions

  • the invention relates to an aggregate for surfaces of traffic areas according to the preamble of claim 1 and a method for manufacturing of this aggregate and a method for its installation in a traffic area.
  • the main active ingredients are salts such as NaCl for use.
  • Such an additive which is in the form of a filler, So a very fine-grained material in a mixing plant the mix for one bituminous top layer is added. To wash out too quickly of the active ingredient and unwanted moisture formation in high humidity prevent, the active ingredient is mixed with a water repellent.
  • method for the production of appropriate fine grain mixtures as ice-inhibiting fillers are for example from the patent documents EP 0 422 753 A1, DE 34 04 271 A1 and DE 41 29 621 A1 are known.
  • the surface layer of a road surface is usually several centimeters thick.
  • the course of the life of the cover layer becomes only a small part of its layer thickness abraded by wear, so that from the total in the top layer mixed in aggregate with ice formation inhibiting effect only one accordingly small part can develop its intended effect at all.
  • a Protective layer made of a granular mineral component and a binder described for the surfaces of traffic areas the mineral component contains an ice-inhibiting material that is at least partially in Form of a filler, so it is very finely divided. Otherwise, the mineral Component present as crushed sand and / or grit.
  • the proportion of the ice inhibiting Material on the mineral component should preferably be at least 30% by mass.
  • the object of the invention is a fine-grained aggregate with anti-icing Propose effect for the construction of traffic areas that can be produced cheaply and is easy to process, with a concentration of this aggregate should be possible as close as possible to the surface of the cover layer.
  • the amount the substance effective for inhibiting ice formation should be as high as possible.
  • a method for producing this additive and a method are also intended specified for its installation in traffic areas.
  • the invention provides for the aggregate to be in the form of a fine-grained material with a maximum grain size of less than 0.5 mm.
  • the aggregate preferably has at least 85% by weight of a grain size of less than 0.2 mm.
  • An essential component of the individual grains is an active ingredient which inhibits ice formation, preferably a salt such as NaCl, KCl or MgCl 2 , NaCI being particularly preferred because of the economically advantageous procurement options (for example as a residual salt from another production).
  • the active ingredient consists of primary grains with a maximum primary grain size of less than 0.2 mm, preferably less than 0.09 mm, the surface of which is treated with bitumen, so that in particular the smallest primary grains are agglomerated with one another to form larger secondary grains or glued to larger primary grains.
  • the aggregate according to the invention is already well protected against moisture absorption and an undesirably quick washout.
  • it may be expedient to hydrophobicize the active substance separately ie the primary grains are mixed with a hydrophobizing agent before the treatment with bitumen.
  • the proportion of bitumen in the finished aggregate is usually in the range from 1 to 10% by mass, preferably in the range from 3 to 5% by mass.
  • the aggregate can contain other components if required, such as limestone powder.
  • the aggregate according to the invention can be produced in a very simple manner respectively.
  • the finely divided active ingredient preferably ground hydrophobized NaCI, as well as any other desired components that have a primary grain size less than 0.2 mm, preferably less than 0.09 mm, are placed in a compulsory mixer (e.g. ploughshare mixer).
  • a compulsory mixer e.g. ploughshare mixer
  • bitumen addition can be done in one Step or in several subsets in succession. If the bitumen is added in the form of an emulsion, the mixing can be cold, ie at ambient temperature respectively.
  • bitumen is used as a binder the walls of the mixer are heated to prevent the mixture from sticking avoid, and the bitumen with a temperature in the range of about 180 - 250 ° C, preferably 220-230 ° C, added.
  • Mixing will last at least as long carried out until the bitumen is evenly distributed in the mixture, and finished before the agglomerates that form have a secondary grain size of 0.5 mm, preferably 0.3 mm.
  • the mixture produced is then removed from the mixer and filled into transport containers for further processing in traffic area construction.
  • the product produced in this way is extremely free-flowing and does not undergo shredding (e.g. by grinding).
  • known preparation of an additive requires the mixture Use of hot bitumen as a binding agent not even at a low temperature to be cooled before it can be packaged as it is surprisingly remains free-flowing even when warm.
  • the amount of bitumen added is preferably set in the range of 3-5% by mass.
  • the mixing time can generally be in the range from 1.5 to 8 minutes, preferably 3 - 5 min. Should be minor under unfavorable conditions Parts of undesirably large secondary grains may have formed Need be screened. However, this usually does not happen.
  • the processing of the aggregate according to the invention ie its installation in bitumen-bound traffic areas, can be carried out in different ways. It is advisable to apply the aggregate in the amount desired, preferably 100 to 1000 g / m 2 , in particular 300 to 500 g / m 2 , to the top or bottom layer of the traffic area, the bitumen portion of which has not yet solidified, applied warm or cold, the individual grains of the aggregate should impinge on this uppermost layer at an increased speed in order to be able to penetrate into the open cavities of the uppermost layer with the greatest possible surface coverage, so that the cavities are largely preserved.
  • the additive which can be conveyed very well pneumatically, can thus be inflated, for example, onto the surface of the cover layer, so that the impact velocity of the active substance particles is greater than in a free fall if the additive were merely sprinkled on.
  • the traffic area is then rolled over, so that the aggregate is also stored to a certain depth in the surface layer.
  • the use of the material according to the invention is possible in principle in the construction of new traffic areas as well as in the surface treatment by applying protective layers, both in hot installation and in cold installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Road Signs Or Road Markings (AREA)
  • Traffic Control Systems (AREA)
  • Road Repair (AREA)
  • Disintegrating Or Milling (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Claims (20)

  1. Agrégats pour surfaces destinées à la circulation, comprenant un matériau granuleux dont le principal composant est une substance active inhibant la formation de glace, la substance active étant présente sous la forme de grains primaires fins et liée au moyen d'un liant,
    caractérisés en ce
    que les grains primaires de la substance active présentent une granulométrie maximale inférieure à 0,2 mm et sont traités en surface au moyen de bitume de sorte qu'au moins les fines de la substance active avec une granulométrie inférieure à 0,003 mm soient complètement ou presque liées par le bitume aux grains secondaires à agglomérer, la granulométrie maximale des agrégats ne dépassant pas 0,5 mm.
  2. Agrégats selon la revendication 1
    caractérisés en ce
    les grains primaires sont traités avec un moyen imperméabilisant.
  3. Agrégats selon l'une des revendications 1 à 2
    caractérisés en ce
    que la granulométrie des grains primaires ne dépasse pas 0,09 mm.
  4. Agrégats selon la revendication 3
    caractérisés en ce
    qu'au moins 85 % en masse des agrégats présentent une granulométrie inférieure à 0,2 mm.
  5. Agrégats selon l'une des revendications 1 à 4
    caractérisés en ce
    que la substance active est essentiellement constituée d'un sel, notamment du NaCl.
  6. Agrégats selon l'une des revendications 1 à 5
    caractérisés en ce
    que la proportion de bitume est comprise entre 1 et 6 % en masse, notamment entre 3 et 5 % en masse.
  7. Procédé pour la fabrication d'agrégats selon la revendication 1
    caractérisé en ce
    qu'une substance active broyée de granulométrie inférieure à 0,2 mm, notamment à 0,09 mm, est mélangée dans un malaxeur à mélange forcé avec 1 à 10 % en masse de bitume (par rapport au mélangé) et que le bitume est réparti de manière uniforme,
    que le malaxage est interrompu avant que l'agglomération en cours des grains primaires de la substance active ne produise des grains secondaires de granulométrie supérieure à 0,5 mm et en ce
    que les agrégats ne subissent plus aucun broyage après avoir quitté le malaxeur.
  8. Procédé selon la revendication 7
    caractérisé en ce
    qu'on met en oeuvre comme substance active un sel moulu, notamment du NaCl moulu.
  9. Procédé selon l'une des revendications 7 à 8
    caractérisé en ce
    que le bitume est ajouté à une température comprise entre 180° et 250 °C et que les parois du malaxeur à mélange forcé sont chauffées.
  10. Procédé selon la revendication 9
    caractérisé en ce que la température est réglée entre 220° et 230 °C.
  11. Procédé selon l'une des revendication 9 à 10
    caractérisé en ce
    que la quantité de bitume ajouté est réglée sur 3 à 5 % en masse.
  12. Procédé selon l'une des revendications 7 à 11
    caractérisé en ce
    que le mélange est interrompu avant que la granulométrie secondaire ne dépasse 0,3 mm.
  13. Procédé selon l'une des revendications 7 à 12
    caractérisé en ce
    que le temps de malaxage est réglé sur 1,5 à 8 minutes, notamment sur 3 à 5 minutes.
  14. Procédé selon l'une des revendications 7 à 8
    caractérisé en ce
    que le bitume est ajouté sous forme d'émulsion aqueuse.
  15. Procédé selon l'une des revendications 7 à 14
    caractérisé en ce
    que lé bitume est ajouté au mélange en plusieurs fois pendant le malaxage.
  16. Procédé selon l'une des revendications 7 à 15
    caractérisé en ce
    qu'avant sa mise en oeuvre, la substance active broyée est traitée avec un moyen imperméabilisant.
  17. Procédé pour l'intégration d'agrégats selon la revendication 1 dans une surface destinée à la circulation
    caractérisé en ce
    que les agrégats sont appliqués uniformément en quantité voulue sur une couche supérieure, déposée à chaud ou à froid selon une méthode connue en soi, de la surface destinée à la circulation, et dont la part de bitume n'est pas encore solidifiée, l'application s'opérant à une vitesse supérieure à la vitesse de chute libre des grains des agrégats, et en ce que la surface destinée à la circulation est ensuite passée au rouleau.
  18. Procédé selon la revendication 17
    caractérisé en ce
    que les agrégats sont convoyés pneumatiquement et appliqués par soufflage vertical sur la couche supérieure de la surface destinée à la circulation.
  19. Procédé selon l'une des revendications 17 à 18
    caractérisé en ce
    que la quantité d'agrégats appliquée est comprise entre 100 et 1000 g/m2, notamment entre 300 et 500 g/m2.
  20. Procédé selon l'une des revendications 17 à 19
    caractérisé en ce
    que la couche supérieure est déposée au cours de l'application d'une couche de protection sur une surface destinée à la circulation déjà existante.
EP97942802A 1996-09-10 1997-09-04 Agregats pour surfaces destinees a la circulation Expired - Lifetime EP0925406B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19638743 1996-09-10
DE19638743A DE19638743C2 (de) 1996-09-10 1996-09-10 Körniges Material, dessen Herstellung und Verwendung
PCT/DE1997/001972 WO1998011301A1 (fr) 1996-09-10 1997-09-04 Agregats pour surfaces destinees a la circulation

Publications (2)

Publication Number Publication Date
EP0925406A1 EP0925406A1 (fr) 1999-06-30
EP0925406B1 true EP0925406B1 (fr) 2001-07-04

Family

ID=7806449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97942802A Expired - Lifetime EP0925406B1 (fr) 1996-09-10 1997-09-04 Agregats pour surfaces destinees a la circulation

Country Status (7)

Country Link
EP (1) EP0925406B1 (fr)
AT (1) ATE202813T1 (fr)
AU (1) AU4450897A (fr)
CZ (1) CZ81299A3 (fr)
DE (2) DE19638743C2 (fr)
PL (1) PL332090A1 (fr)
WO (1) WO1998011301A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117437A1 (de) * 2001-04-03 2002-10-17 Wilhelm Kaemereit Verfahren zur Verhinderung winterlicher Glättebildung auf Verkehrsflächen sowie Bitumenemulsion
US7465360B2 (en) * 2005-05-02 2008-12-16 Southwest Research Institute Methods for removing a dispersed lubricious coating from a substrate

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3404271A1 (de) * 1984-02-03 1985-08-08 Mannesmann AG, 4000 Düsseldorf Feinkorngemisch
DE3808250A1 (de) * 1988-03-12 1989-09-21 Veba Oel Ag Strassenbelag aus einem asphaltmischgut mit einer eishemmenden komponente
NO176812C (no) * 1989-10-13 1995-05-31 Mannesmann Ag Fremgangsmåte for fremstilling av en finkornblanding som viser hydrofobe egenskaper
CS113591A3 (en) * 1991-04-22 1992-11-18 Pavol Ing Kovac Antifreeze ingredient into bituminous wearing courses of roads andpavements
DE4129621A1 (de) * 1991-09-06 1993-03-11 Gruenau Gmbh Chem Fab Pulverfoermiger hydrophober fueller fuer bitumengebundene verkehrsflaechen
DE4230545C1 (de) * 1992-09-09 1994-03-24 Mannesmann Ag Verfahren zur Herstellung eines synthetischen salzhaltigen Brechsandes und/oder Splitts
WO1994023130A1 (fr) * 1993-04-01 1994-10-13 Mannesmann Ag Couche superficielle de protection de surfaces de circulation et procede d'application d'une couche de protection

Also Published As

Publication number Publication date
AU4450897A (en) 1998-04-02
EP0925406A1 (fr) 1999-06-30
DE59703969D1 (de) 2001-08-09
ATE202813T1 (de) 2001-07-15
WO1998011301A1 (fr) 1998-03-19
CZ81299A3 (cs) 1999-07-14
DE19638743C2 (de) 1998-11-26
DE19638743A1 (de) 1998-03-12
PL332090A1 (en) 1999-08-30

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