INTRODUCTION OF VISCOSITY GRADE BITUMEN (VG BITUMEN) This particular variety of bitumen, which is of an appropriate grade, is put to use in the production of asphalt, street paving, and concrete sidewalks. Refinery bitumen is produced via vacuum baton aeration in the distillation tower. Viscosity Grade Bitumen (VG Bitumen), which is the type of bitumen … Continue reading VISCOSITY GRADE BITUMEN (VG BITUMEN)