This type of bitumen is obtained during the process of oxidation of vacuum bottom (the bitumen production feedstock that derives from distillation tower residue in vacuum oil refineries) at bitumen production units. In a manner that its penetration point (kind of test to indicate the hardness of bitumen) becomes between 60-70.
|Bitumen 60/70||Specification||Test method|
|Specific gravity @25/25 C||1.01-1.06||D-70|
|Penetration @25 C||60/70||D-5|
|Softening point C||49/56||D-36|
|Ductility @25 C||100 min.||D-113|
|Loss on heating (wt)%||0.2 max.||D-6|
|Drop in penetration after heating %||20 max.||D-6 & D-5|
|Flash point C||250 min.||D-92|
|Solubility in CS2 (wt)%||99.5 min.||D-4|
Usage: The main common usage of this product is in road making in temperate regions.