Limestone #53 INDOT, also known as INDOT #53 stone, #53 crushed limestone, dense-graded aggregate, or specification-grade road base, is a well-graded blend of coarse limestone, smaller stone, stone dust, and fines produced to meet Indiana Department of Transportation requirements. It is commonly supplied as approximately 1 1/2-inch-minus material, with particles ranging from the larger top size down to fine limestone dust that supports tight compaction.
The balanced gradation allows smaller particles to fill the spaces between larger stone as the material is graded and mechanically compacted. This creates a dense, firm foundation with strong load-bearing capacity and dependable resistance to shifting, rutting, and settlement under vehicle traffic and structural loads.
Limestone #53 INDOT is widely used for roadway, driveway, parking, and site-development projects that require consistent gradation and specification-grade performance. Its larger top size provides substantial structural strength, while the fines help bind the aggregate into a stable base beneath asphalt, concrete, gravel surfaces, slabs, and other high-traffic improvements.
Common Applications of Limestone #53 INDOT
- Base beneath asphalt and concrete pavement
- Commercial and municipal road construction
- Driveway and heavy-duty access-road bases
- Parking lot and equipment-area preparation
- Sub-base stabilization over soft ground
- Construction entrances and staging areas
- Structural backfill and slab support
- Site grading and foundation preparation









