What is Oxidized Bitumen 85/40? Oxidized Bitumen 85/40, also known as blown bitumen, is a semi-solid petroleum bitumen grade resulting from air-blowing asphalt flux. The flux is normally derived by oxidizing asphalt 60/70 with hot air. 85/40 is grade referring to penetration value and the softening point of the material. Softening point is carried out […]
Oxidized Bitumen 90/40, also called blown asphalt 90/40, combines a high softening point of 85 to 95 °C with a relatively soft body of 35 to 45 dmm penetration. That pairing is unusual and it is the reason the grade exists: it holds its shape in heat like a hard grade, but still tolerates the movement […]
