Oxidized Bitumen 115/15 (Blown Asphalt 115/15) Oxidized Bitumen 115/15 — also referred to as Blown Asphalt 115/15 or Blown Bitumen 115/15 — is a hard-grade industrial bitumen produced through a controlled air-blowing process applied to vacuum-bottom petroleum bitumen at temperatures exceeding 250°C. The designation “115/15” directly encodes its two defining parameters: a ring-and-ball softening point […]
