1) Type AS1. Either natural or manufactured sand or a combination of the two conforming to the following requirements: Compact Bulk Density (Unit Weight). Minimum 70 pounds per cubic foot and not exceeding 110 pounds per cubic foot determined according to AASHTО Т 19. Crushed Fragments. If natural sand is furnished, not less than 35% of the fragments retained on the 2.36 mm (No.8) sieve are required to be crushed fragments, determined according to ASTM D 5821. Iron. Total of individual anti-skid particles containing metallic iron may not exceed 1.0% by mass (weight) of material, determined by dividing the mass (weight) of such particles retained on the 4.75 mm (No. 4) sieve by the total dry mass (weight) of the sample. 2) Type AS2. Crushed stone or crushed gravel conforming to the following requirements: Bulk Density (Unit Weight). Minimum 70 pounds per cubic foot and not exceeding 105 pounds per cubic foot determined according to AASHТО Т 19. Los Angeles Abrasion. Abrasion loss not exceeding 55%, determined according to AASHTO T96, Gradation D. Crushed Fragments. If natural sand is furnished, not less than 60% of the fragments retained on the 4.75 mm (No.4) sieve are required to be crushed fragments, determined according to ASTM D 5821. Iron. Total of individual anti-skid particles containing metallic iron may not exceed 1.0% by mass (weight) of material, determined by dividing the mass (weight) of such particles retained on the 4.75 mm (No. 4) sieve by the total dry mass (weight) of the sample.
