Bitumen penetration grade 20-30 is a semi-hard penetration grade bitumen which is usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties.
Bitumen penetration grade 20-30 is a semi-hard penetration grade bitumen which is usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties.