Aggregate Base Course (1.5″ Minus, Penndot, Subbase)

Aggregate Base Course, Penndot Subbase, 1.5” Minus

Aggregate Base Course in a 1.5" minus size, specified as Penndot Subbase, is a well-graded blend of crushed stone and fines designed for superior compaction and stability. The "1.5" minus" designation means the largest particles are 1.5 inches in diameter, with smaller particles and fines filling the gaps. This gradation ensures a dense, interlocking structure that resists shifting and settling.




The Penndot Subbase attribute indicates compliance with Pennsylvania Department of Transportation standards, making it suitable for both public and private infrastructure projects. This material is commonly used as a foundational layer beneath roads, driveways, parking lots, and concrete slabs. Its excellent compaction properties provide a stable, load-bearing base, while the fines help lock the aggregate in place, reducing voids and improving durability. While its dense nature makes it less ideal for drainage applications, it excels where strength and stability are required.