Gravel

Gravel is small, loose, rock particles. It is any loose rock that is larger than 2 mm (0.079 in) in its smallest dimension (about 1/12 of an inch) and no more than 64 mm (2.5 in).

Small gravel is composed of granules (>2 to 4 mm/0.079 to 0.16 in). Large gravel is called pebbles (>4 to 64 mm/0.16 to 2.5 in).

Particles smaller than gravel are sand, larger particles are cobbles.

Gravel and sand are used for road surfaces, and for cement and Tarmac. Mixtures of gravel and sand mixed with various crushed material, are known as aggregate in the trade. This is used for drainage in the basement of roads, and other purposes. Mixture of stones and resin is also used to pave footpaths, driveways, etc. This mixture is known as Resin Bonded Gravel.^[1][2]

1. ↑ "Resin Bonded Gravel". Resin Bonded Gravel. Retrieved 2020-10-29.
2. ↑ "Resin Bonded Gravel". www.resinbondedgravel.org.uk. Retrieved 2020-11-16.