Bitumen. Bitumen is a brown to black semi-solid highly viscous form of petroleum. It is present in some natural deposits,such as asphalt lakes,but can also be a product of refining. It's primary use is in road-surfacing and roofing material where it is mixed with gravel | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Schwanberg, Victor |
Taille de l’image : | 5014 px × 3510 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |