As aggregate materials are called the aggregate materials (rock, gravel, sands) or industrial origin (slags, recycled concrete, etc.) and other inorganic materials used in combination with some adhesive (cement , bitumen, etc.) for the production of compositions such as concrete, asphalt mixes and paved pavements or even (e.g., railroad ballast). They are called aggregates because the majority of them do not chemically react with the various "adhesive" materials. The largest amount of aggregates comes from the breakage of suitable mined rocks (mainly limestone) or from further rupture of natural deposits (a mix of mainly limestone, quartz and granite rocks) of rivers and streams.