Bitumen modification is applied through various processes to enhance its properties for asphalt production. Common methods include the addition of polymers, such as SBS (styrene-butadiene-styrene), which improve elasticity and temperature resistance. Other techniques involve the use of crumb rubber from recycled tires, enhancing durability and reducing environmental impact. These modifications can be achieved through blending, where modifiers are mixed with bitumen at high temperatures, ensuring uniform distribution and improved performance in asphalt applications.