Patents Assigned to Laxa Bruk AB
  • Patent number: 4613376
    Abstract: A surfacing mass especially for outdoor use and mainly comprising a mixture of asphalt and a stone material having a low content of fine material. The mixture comprises a little amount of fibres of a type which is not solved or softens in the asphalt, preferably mineral fibres. The fibre material has an average diameter of between 1 and 5 .mu.m and is added in an amount of between 0.5 and 20% by weight calculated on the amount of asphalt. The invention also relates to a method of manufacturing such surfacing mass at a mixing temperature of 140.degree.-170.degree. C. or preferably 150.degree.-160.degree. C. both for the asphalt and the stone mass. Preferably the fibre material is admixed in the asphalt before the mixing thereof with the stone material. The fibre material may be admixed in the asphalt at an asphalt temperature which is higher than the mixing temperature for asphalt and stone material.
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: September 23, 1986
    Assignee: Laxa Bruk AB
    Inventors: Nils-Olov Nilsson, Ingmar Andersson, Ulrik Sandberg, Eils Karlsson