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What Are the Sizes of Gravel?

The udden-wentworth scale, widely used by geologists in the us, defines granular gravel as particles with a size from 2 to 4 mm (0.079 to 0.157 in) and pebble gravel as particles with a size from 4 to 64 mm (0.16 to 2.52 in). This corresponds to all particles with sizes between coarse sand and cobbles.

What Are the Sizes of Gravel?

Gravel comes in a variety of sizes. The smallest gravel is called fines and is about 1/16 1/8 of an inch (1.6 3.2 mm) in diameter. The largest gravel is called cobbles and is about 3 6 inches (76 152 mm) in diameter.

There is also pea gravel, which is about 1/4 3/8 of an inch (6.4 9.5 mm) in diameter. The size of the gravel you use will depend on what you are using it for.

For example, if you are using it for a driveway, you will need to use a larger size gravel than if you are using it for a walkway.

Here are a few more examples of gravel sizes and their uses:

Fine gravel:

Asphalt aggregate Concrete aggregate

Drainage stone

Landscaping Medium gravel:

Driveway gravel

Railroad ballast

Roofing gravel Coarse gravel:

Base course for roads and parking lots

Drainage stone Riprap

Gabion stone

As you can see, there are a variety of uses for gravel of

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