Recycled Materials

Recycled Materials 4 Stone

#4 recycled concrete is old concrete that's been crushed and screened to pieces between about 3/4 inch and 1½ inches. It's made from broken-up sidewalks, driveways, and slabs run through a crusher. The rebar gets pulled out with magnets, and the pieces come out angular so they lock together under load.

The 4 is a screen size from the ASTM D448 spec. It tells you how big the pieces are and says nothing about where the concrete came from. It usually runs cheaper than fresh crushed stone at the same size because the raw stock is demolition debris instead of quarried rock. It works fine for base, drainage, or fill where color doesn't matter.

named grade in this family

What people use it for

Driveway sub-base under a top layer of gravelConstruction site entrances to keep trucks from tracking mudDrainage rock and French drainsBackfill around foundations and retaining wallsErosion control on slopes and shouldersFill for low spots on a lot

How to choose within recycled materials 4 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 4 stone grades

#4 Stone (3/4″ To 1.5″, Concrete, Recycled, Caramel)

Drainage systemsDriveway baseErosion control

1.5" to 3/4"

Other recycled materials families

Recycled Aggregate

Reference

Recycled rock is old concrete and asphalt that's been crushed down and screened to size.

35 grades→

Screenings

Reference

Screenings are the fine leftovers from crushing rock.

5 grades→

Recycled Materials 57 Stone

Reference

Recycled #57 stone is old concrete that's been crushed and screened down to pieces between about 1 inch and 1/4 inch.

3 grades→

Recycled Brick

Reference

Recycled brick is old clay brick crushed down into chunks and chips.

2 grades→

Recycled Materials Asphalt Aggregate

Reference

Recycled asphalt is old road pavement that's been ground back down into gravel-sized pieces.

2 grades→

Recycled Concrete Aggregate

Reference

Recycled concrete is old concrete that's been crushed and screened into usable sizes.

1 grade→

Recycled Materials 1 Stone

Reference

#1 recycled stone is crushed old concrete screened to a large size, roughly 1½ to 3½ inches across.

1 grade→

Recycled Materials 610 Stone

Reference

Recycled 610 stone is old concrete that's been crushed and screened down to a spread of sizes from about 1 inch to fines.

1 grade→

Recycled Materials 8 Stone

Reference

#8 recycled stone is crushed recycled concrete screened between about 3/8 inch and 1/8 inch.

1 grade→

Recycled Materials Aggregate Base Course

Reference

Recycled base is crushed-up old concrete — sidewalks, curbs, broken slabs, foundations — run through a crusher and screened down to a mix…

1 grade→

Recycled Materials Concrete Aggregate

Reference

Recycled concrete is old concrete that's been crushed and screened back into usable rock.

1 grade→

Recycled Sand

Reference

Recycled sand is the fine stuff left over when crushed concrete, brick, or old asphalt gets processed.

1 grade→

Browse all recycled materials families →