Aggregate Base Course (3/8″ To 3/4″, Ca-5, Idot)

Aggregate Base Course Ca-5, IDOT, 3/8” to 3/4”

Aggregate Base Course with a Ca-5, IDOT specification in a 3/8" to 3/4" size range is a high-quality crushed stone blend designed for use as a stable foundation layer in construction projects. Produced by mechanically crushing and screening durable stone, this material meets Illinois Department of Transportation (IDOT) standards, ensuring consistent gradation and performance.




The 3/8" to 3/4" size range offers an optimal balance between compaction and drainage. The angular particles interlock well, creating a firm, load-bearing base that resists shifting, while the gradation allows for efficient water movement to prevent pooling and frost heave. This makes it ideal for use under roadways, driveways, parking lots, sidewalks, and patios. The Ca-5, IDOT attribute guarantees compliance with state requirements, making it suitable for both residential and commercial projects. Pros include excellent stability, reliable drainage, and ease of compaction; however, its coarser texture may not be suitable for decorative surface applications.