Section 4125. Aggregate for Bituminous Sealcoat.

4125.01 DESCRIPTION.
Crushed stone, gravel, or sand.

• Must be washed.
• Crushed aggregate is required for primary and interstate roadways and may be specified for other projects.
• Produce crushed gravel as a separate operation by crushing the gravel particles retained on a screen at least 1/4 inch (6 mm) larger than the aggregate size specified.

4125.02 GRADATION.
Meet aggregate gradation requirements for the gradation number specified. Unless otherwise specified, use the 1/2 inch (12.5 mm) sieve size.

TABLE 4125.02
Size	Gradation No.
1/2 inch (12.5 mm) Crushed Gravel or Stone	19
Screened Gravel	20
3/8 inch (9.5 mm) Crushed Gravel or Stone	21 (a)
Sand Cover Aggregate	1 (b)
(a) 1/2 inch (12.5 mm) size may be used when 3/8 inch (9.5 mm) size is specified except for Primary Road applications. (b) For a crushed stone product allow up to 4% passing the #200 (75 μm) sieve.

4125.03 QUALITY.