AASHTO R 106-22

This standard determines application quantities for applied graded cover aggregate and emulsified asphalt for sand seals on properly prepared bituminous streets. A sand seal is the application of emulsified asphalt following immediately by an application of a single layer of fine graded cover aggregate. The seal may be applied in multiple lifts depending on traffic demands and existing road surface conditions.

This standard was formerly designated as provisional practice PP 90.