Oxidized Bitumen 85/40 General Description of Oxidized Bitumen 85/40 Oxidized Bitumen 85/40, also known as Blown bitumen, is produced by blowing hot air into penetration bitumen, making it more rubbery and harder. This process recovers weight loss under heating, resulting in a higher softening point and higher penetration index (PI) than regular bitumen. This special […]
