Bitumen cut-backs

Cut back or 160/220 70/100 grade bitumen by mixing bitumen with kerosene to set Penn Vykvzyth is produced.

The current time in seconds by using a standard tar viscometer (Standard Tar Viscometer: STV) specify and design. There are three grades of this type of pitch: 50, 100 and 200 seconds. Application of bitumen, cut back to the level used (surface dressing) and a large part of it to the standard asphalt and asphalt (deferred set asphalt) is used. In addition to STV and solubility tests, tar distillation and diffusion properties needed Cut-back should be adapted for the remaining bitumen. Cut back the bitumen specifications in the table below: