Gravel is called bulk inorganic material, which is formed naturally when the mountains are destroyed. Its dimensions vary from 5 to 10 mm. The form of gravel, unlike crushed stone, is even and rounded. Gravel happens:
small – dimensions from 1 to 2.5 mm;
average – dimensions from 2.5 to 5 mm;
large – dimensions from 5 to 10 mm.
It is mined in open careers. It contains impurities such as sand, dust and clay.
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The following types of gravel exist: glacial, mountain, river, sea, lake. The most frequent in use is mountain gravel, which has a rough surface, which leads to better clutch. This gravel is used when filling the grounds, filling the sites for sports and gaming, in road construction, as a filler for heavy concrete. It is also used by laying the foundation for the production of roofs.
River and sea gravel is also used in construction. But its surface is smoother and there are fewer impurities in it.
The range of colors in gravel is wide: pink, black, brown, gray-blue, white and yellow. Its shades change depending on illumination and humidity.
Thanks to this, gravel is widely used to create landscape designs. Namely: breaking flower beds, decorating the garden, arranging roadway roads and garden pedestrian paths.