How from oxidized bitumen 115/15 can make bitumen 60/70

By adding solvent and heating the media you can back to one stage before which has been bitumen 60/70.Bitumen 115/15 already taken the hydrocarbon so if you add into and mix it then bitumen 60/70 will appear. For more information : http://localhost/atdmco-Old/oxidized-bitumen-115-15/