Aggregate Base Course (3/8″ To 1.5″, Ca-7, Limestone, Idot)

Aggregate Base Course - Ca-7 Limestone (IDOT), 3/8” to 1.5”

Aggregate Base Course with a Ca-7 limestone specification, approved by IDOT, in a 3/8" to 1.5" size range is a high-quality, crushed stone material commonly used as a foundational layer in construction projects. Produced from durable limestone, this aggregate is carefully graded to ensure consistent particle sizes, which enhances compaction and load-bearing capacity.




The 3/8" to 1.5" size range offers an optimal balance between stability and drainage. Larger particles provide excellent structural support, while the inclusion of smaller pieces helps fill voids for a tightly compacted base. This makes it ideal for use under roadways, driveways, parking lots, and concrete slabs, as well as for sub-base layers in commercial and residential construction. The Ca-7 specification ensures compliance with state standards, making it a reliable choice for public infrastructure projects. Pros include superior compaction, durability, and effective drainage, though the coarse texture may not be suitable for decorative or surface applications.