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#57 limestone, also known as FDOT Code 10 stone, #57 crushed limestone, washed limestone, or clean drainage stone, is a specification-grade, angular aggregate used throughout Florida for roadway, drainage, concrete, and construction projects. It typically consists of clean limestone ranging from approximately 1/2 inch to 1 inch, with most pieces averaging around 3/4 inch. Exact gradation may vary by approved source and project requirements.
Because the stone is washed and contains little to no dust or fines, it creates open spaces that allow water to move through efficiently. Its fractured edges help the aggregate interlock and remain stable under load, providing a dependable combination of drainage, durability, and structural support.
#57 limestone is one of the most widely used construction aggregates because its versatile size performs well in both residential and commercial applications. It is large enough to maintain drainage and resist movement, yet small enough to spread evenly around pipes, foundations, retaining walls, concrete structures, and hardscape installations. FDOT Code 10 material is especially useful for projects that require consistent aggregate quality and specification-grade performance.
Common Applications of #57 Limestone (FDOT Code 10)
- Pipe bedding and utility trench support
- Retaining wall and foundation backfill
- Perimeter and subsurface drainage systems
- Structural support beneath slabs and flatwork
- Concrete production and aggregate mixes
- Roadway and infrastructure construction
- French drains and stormwater systems
- Driveway and parking-area stone
