Recycled Materials
Recycled Materials 8 Stone
#8 recycled stone is crushed recycled concrete screened between about 3/8 inch and 1/8 inch. It's made from old sidewalks, driveways, and demolition slabs run through a crusher and sized down to small angular chips. The pieces lock together when you tamp them, so they hold shape under weight instead of rolling around.
The 8 is a screen size from the ASTM D448 spec. It tells you how big the pieces are and nothing about where the rock came from, and in this case that's broken-up concrete instead of a quarry. Recycled #8 usually runs cheaper than virgin #8 crushed stone, and you'll see it used as pipe bedding, drainage under pavers, and backfill where the color doesn't need to match natural stone.
What people use it for
How to choose within recycled materials 8 stone
Base under something else
Reclaimed concrete or asphalt millings work great as base under a driveway or slab. The layer above hides what's underneath.
When the top layer is visible
Recycled base compacts to grey or dusty tan, not the clean look of fresh crushed stone. Fine under a surface course, off if it's the finish.
Check the source
Reclaimed loads vary by demo site. A supplier who can tell you where the feedstock came from is a better bet than the cheapest yard in town.
All recycled materials 8 stone grades
Other recycled materials families
Recycled Aggregate
ReferenceRecycled rock is old concrete and asphalt that's been crushed down and screened to size.
Screenings
ReferenceScreenings are the fine leftovers from crushing rock.
Recycled Materials 57 Stone
ReferenceRecycled #57 stone is old concrete that's been crushed and screened down to pieces between about 1 inch and 1/4 inch.
Recycled Brick
ReferenceRecycled brick is old clay brick crushed down into chunks and chips.
Recycled Materials Asphalt Aggregate
ReferenceRecycled asphalt is old road pavement that's been ground back down into gravel-sized pieces.
Recycled Concrete Aggregate
ReferenceRecycled concrete is old concrete that's been crushed and screened into usable sizes.
Recycled Materials 1 Stone
Reference#1 recycled stone is crushed old concrete screened to a large size, roughly 1½ to 3½ inches across.
Recycled Materials 4 Stone
Reference#4 recycled concrete is old concrete that's been crushed and screened to pieces between about 3/4 inch and 1½ inches.
Recycled Materials 610 Stone
ReferenceRecycled 610 stone is old concrete that's been crushed and screened down to a spread of sizes from about 1 inch to fines.
Recycled Materials Aggregate Base Course
ReferenceRecycled base is crushed-up old concrete — sidewalks, curbs, broken slabs, foundations — run through a crusher and screened down to a mix…
Recycled Materials Concrete Aggregate
ReferenceRecycled concrete is old concrete that's been crushed and screened back into usable rock.
Recycled Sand
ReferenceRecycled sand is the fine stuff left over when crushed concrete, brick, or old asphalt gets processed.