Concrete Aggregate

Concrete Aggregate 4 Stone

#4 stone is crushed rock that runs about 1½ inch down to ¾ inch. The pieces are big, angular, and full of open space between them, so water pours right through instead of pooling on top. You'll see it packed around foundation drains, dumped along culverts, and spread on muddy job-site roads to make them walkable in a hurry.

The 4 comes from ASTM D448, the spec that sorts crushed stone by size number. It tells you the pieces run roughly 1½ inch to ¾ inch and says nothing about the rock itself — you'll get limestone, granite, or trap rock depending on what's quarried near you. Because the stones are big and heavy, a yard covers less ground than smaller sizes like #57, so order a bit extra when you're building depth.

named grade in this family

What people use it for

Foundation and footing drainsFrench drains and dry wellsCulvert and large pipe beddingBase for muddy driveways or job-site access roadsErosion control on slopes and shorelinesHeavy fill under slabs and foundations

How to choose within concrete aggregate 4 stone

Match the mix design

Batch plants and ready-mix trucks work to a spec. Confirm the size and gradation the plant is running before you order.

Coarse vs. fine

Coarse aggregate gives the mix its strength; fine aggregate fills the gaps. A slab needs both — usually delivered separately and blended at the plant.

Cleanliness matters

Fines and clay contamination weaken the cure. If a load looks dusty, ask for a wash spec sheet before you take delivery.

All concrete aggregate 4 stone grades

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

Concrete aggregateDrainage baseDriveway stone

1.5" to 3/4"

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Other concrete aggregate families

Concrete Sand

Reference

Concrete sand is a coarse, washed sand screened to a specific size range so it works in a concrete mix.

16 grades→

Concrete Aggregate Sand

Reference

Concrete sand is a coarse washed sand with grains up to about 3/8 inch across.

4 grades→

Concrete Aggregate 57 Stone

Reference

#57 stone is crushed rock screened to fall between about 1 inch and 1/4 inch, with the fines washed out.

3 grades→

Concrete Aggregate Rip Rap

Reference

Rip rap is large, loose stone dumped along shorelines, creek banks, ditches, and bridge abutments to stop moving water from washing the g…

3 grades→

Concrete Aggregate 67 Stone

Reference

#67 stone is crushed rock screened between about 3/4 inch and 1/4 inch, with the fines washed out.

2 grades→

Concrete Aggregate Gravel

Reference

Concrete aggregate gravel is washed, rounded rock sized to mix into concrete.

2 grades→

Recycled Concrete

Reference

Recycled concrete is old concrete that's been broken up and crushed back down to gravel size.

2 grades→

Concrete Aggregate 1 Stone

Reference

#1 stone is one of the biggest sizes of clean crushed rock you can buy, with pieces roughly 1 1/2 to 4 inches across.

1 grade→

Concrete Aggregate 3 Stone

Reference

#3 stone is crushed rock sized between about 1 1/2 inches and 2 inches.

1 grade→

Concrete Aggregate 8 Stone

Reference

#8 stone is small crushed rock, roughly 3/8 inch down to the size of coarse sand.

1 grade→

Concrete Aggregate 89 Stone

Reference

#89 stone is small crushed rock, sized between about 3/8 inch and the coarse-sand range.

1 grade→

Concrete Aggregate Crushed Stone

Reference

Concrete aggregate crushed stone is the coarse rock that goes into a concrete mix.

1 grade→

Browse all concrete aggregate families →