Oxidized bitumens are made by blowing air through hot paving grade bitumen.
The so-called blowing process results in harder bitumen that softens at a higher temperature than that at which paving grade bitumen softens.
Industrial bitumens also have more rubber like properties and their viscosities are much less affected by changes in temperature than is the case with paving grade bitumen.
|Specific Gravity at 250c||1.01-1.05||1.01-1.05||1.01-1.05||1.01-1.05||ASTM D-70|
|Penetration at 250c, 100gm, 5 sec||0.1 MM||20/30||20/30||35/45||10/20||ASTM D-5|
|Softening Point, Ring & Ball||0c||80/90||90/100||85/95||110/120||ASTM D-36|
|Ductility at 250c, after TFOT, MIn||CM||1.5||1.5||1.5||1.5||ASTM D-113|
|Loss on HEating, MAX||0c||260||260||260||260||ASTM D-92|
|Solubility in CS@, Min||% Wt||99||99||99||99||ASTM D-4|