Concrete Aggregate

Concrete Aggregate 3 Stone

#3 stone is crushed rock sized between about 1 1/2 inches and 2 inches. The pieces are big, angular, and rough, so they lock together and leave open gaps that let water pour straight through. You'll see it under railroad tracks, along shorelines that need armor, and as a thick base layer beneath heavy slabs and pipes.

The 3 comes from the ASTM D448 sieve chart. It tells you the size and says nothing about the rock itself, so you can get #3 in limestone, granite, or trap rock depending on what your local quarry pulls out of the ground. It's usually priced lower per ton than smaller washed stone because it takes less screening. Freight adds up fast, though, since the pieces are heavy and a yard weighs close to 2,700 pounds.

named grade in this family

What people use it for

Railroad ballastErosion control on shorelines and steep slopesHeavy drainage layer under buildings and parking lotsSub-base under thick concrete slabs and large pipesFill in wet or boggy ground where water needs to moveFrench drains and dry wells

How to choose within concrete aggregate 3 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 3 stone grades

#3 Stone (1″ To 2″, Crushed, Concrete)

Drainage systemsRoad baseErosion control

2" to 1"

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 4 Stone

Reference

#4 stone is crushed rock that runs about 1½ inch down to ¾ inch.

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 →