In construction, crushed stone is more often used from the group of main fractions, each unit of which depends on the size. To perform a separate type of work, material is used from the group of auxiliary fractions. Crushed stone with large fractions is rarely used.
For the production of asphalt, concrete, reinforced concrete structures, structural crushed stone is used, which has a dense metal frame. Roads and railways are covered with rubble with a fraction size of 20 millimeters to 70 millimeters, since the smaller size is not suitable for this type of construction. It is also applied as a filler that creates the main volume in the construction of various structures. It is appropriate to use it when filling the roadway and laying the foundation.
The material must correspond to the radioactivity of the first class with an indicator of not more than 370 BC per kg. A higher degree of radioactivity have the material of the second class, which are used in road construction. High quality crushed stone always has a certificate, which indicates that it is harmless and not radioactive. The most popular in the use of crushed stone cubic small size. It is made on mills and is pre -prepared on special crushing devices, which give the material the desired shape and size.