Concrete Aggregate

Limerock

Limerock is a soft, porous kind of limestone quarried mostly in Florida and the rest of the Southeast. It's off-white to tan, sometimes chalky to the touch, and it breaks apart under a hammer more easily than the hard gray limestone you'd see up North. When it's crushed for concrete work, you get angular chunks with plenty of stone dust mixed in. That dust helps it pack tight, which is why road crews and concrete plants have leaned on it for a hundred years.

The name is regional. A Florida pit calls it limerock; a quarry in Ohio would call the same rock limestone or high-calcium stone. When it's sold for concrete, it's usually screened to a coarse size like #57 or #67 so it mixes clean with sand and cement. Price stays cheap near the source pits and climbs fast as the truck gets farther from them, since limerock is heavy and the freight is most of what you pay.

named grade in this family

What people use it for

ready-mix concreteroad basedriveways and parking padsfoundation fillerosion controlutility trench backfill

How to choose within limerock

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 limerock grades

Limerock (Limerock, Concrete, Gray)

Road baseDrivewaysConcrete aggregate

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 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→

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