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Limestone #8 INDOT, also known as INDOT #8 stone, #8 crushed limestone, or specification-grade limestone aggregate, is a clean, angular stone produced to meet Indiana Department of Transportation gradation requirements. Rather than being a single fixed stone size, INDOT #8 is a graded aggregate with particles distributed across specified sieve sizes for consistent performance. Under the current INDOT specification, all material passes the 1-inch sieve, with most passing the 3/4-inch sieve and smaller portions continuing through the 1/2-inch, 3/8-inch, and No. 4 sieves.
Its washed, low-fines composition supports dependable drainage, while the angular limestone particles interlock to provide stability and load distribution. This balance makes Limestone #8 INDOT useful in construction, drainage, concrete, and hardscape applications where controlled sizing and specification compliance are important.
Limestone #8 INDOT is commonly selected for roadway, municipal, commercial, and residential projects that require a consistent coarse aggregate. Its graded particle range makes it suitable for drainage layers, structural support, bedding, and surface applications while providing more stability than uniformly sized decorative gravel.
Common Applications of Limestone #8 INDOT
- Retaining wall and foundation backfill
- Pipe bedding and utility trench stone
- Perimeter and subsurface drainage systems
- Aggregate drainage layers beneath pavement
- Concrete and construction aggregate
- Driveway and access-road surfacing
- Hardscape and paver support layers
- Decorative landscape gravel with drainage
