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American aashtom 247

AASHTO m247-81 glass beads are made of super grade glass.AASHTO m247-81 glass beads are round, full and clear. It has good refractive index and high hardness. At night, the visibility of road signs is improved, the drivers are guided to drive, and the traffic accidents are reduced. At the same time, the practicability and durability of pavement markings are enhanced, which is economical and practical.The following are the relevant parameters of AASHTO m247-81 (1996) surface type glass beads:Siev