AASHTO #57 - Laurel Aggregates
AASHTO #57. Spec Size: 1" Clean. Application: Driveway gravel, foundation backfill, slab on grade, subgrade material, concrete aggregate. Also referred to as: 2B. Specs with PennDOT 2A Other products. LAUREL AGGREGATES. R-8 Rip Rap . R-7 Rip Rap . R-6 Rip Rap ...