What technical requirements define granular modified bitumen for asphalt or bitumen modification?

Granular modified bitumen must meet specific technical requirements, including appropriate viscosity and penetration levels to ensure proper workability and performance. The modification process often involves the addition of polymers or additives, which should comply with standards like ASTM D6373. Key properties include improved elasticity, temperature susceptibility, and resistance to aging and deformation. Additionally, the granule size and distribution must facilitate uniform dispersion within the bitumen matrix to enhance overall asphalt performance.