(19)
(11) EP 1 408 157 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.01.2005 Bulletin 2005/01

(43) Date of publication A2:
14.04.2004 Bulletin 2004/16

(21) Application number: 03023201.1

(22) Date of filing: 13.10.2003
(51) International Patent Classification (IPC)7: E01C 19/10
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 11.10.2002 SE 0203057

(71) Applicant: Ohlson, Karl Gunnar
281 90 Hässleholm (SE)

(72) Inventor:
  • Ohlson, Karl Gunnar
    281 90 Hässleholm (SE)

(74) Representative: Kastel, Stefan Dipl.-Phys. 
Flügel Preissner Kastel Schober, Patentanwälte Postfach 31 02 03
80102 München
80102 München (DE)

   


(54) Method and device for producing asphalt mix


(57) The invention relates to a method for producing an asphalt mix that includes a coarse fraction, a fine fraction, filler and bituminous binder with the following steps in the mentioned order:
  • a) mixing the coarse fraction and the liquid binder in a mixer (10) and
  • b) discharging the filler with a controlled flow rate to powder the binder liquid which is distributed over the surface of the coarse fraction with the filler and
  • c) spreading the fine fraction over the layer of filler,
wherein the discharge of the filler and the fine fraction is controlled in such a way that the filler and the fine fraction becomes enclosed in a combined suspension where the filler, the fine fraction and the coarse fraction are parts of a closed liquid volume. For improving the mixing method in such way that the time intervals and flow rates can be easier optimised to develop the closed liquid volume and that the production of an asphalt mix with still further reduced tendency to crack is producible, the invention proposes that the filler and/or the fine fraction is discharged into a downwardly directed material flow in the mixer (10). Further, a device for carrying out said method is described.






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