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Crushed Granite (Characteristics, Application, Production, Cost)

Granite crushed stone is a fragment of rocks, which have an acute-angled shape. The material is formed as a result of natural weathering, but consists of loose and weakly cemented clusters. The debris can be up to 100 mm in size, and in terms of the degree of size, they are divided into several fractions:

- 0-5 mm are used for interior decoration, arrangement of tracks and sports grounds,

- 5-20 mm - this is a fine chipping stone, designed for the preparation of concrete and structures from it. It is used for equipping foundations, as well as supports for the bridge and canvas, covering roads and runways,

- 20-40 mm - this is rubble, which is a fragment of medium size. Used to create a cloth for cars and rail transport, as well as laying foundations of industrial facilities,

- 40-70 mm - this fraction is typical for a large-sized material, it is used in the manufacture of concrete, as well as structures and production areas of large size.

Mining is carried out in a career way: first, an explosion of granite is produced, and the blocks formed during the explosion are crushed. Crushing is carried out with the help of special equipment, which is located in the crushing and sorting complexes. The resulting fragments are sieved and divided into different fractions. The smallest fraction is the most expensive in price.

Granite crushed stone is distinguished by strength, frost resistance, flakiness (that is, determining the shape of fragments from the point of view of the plane of their shape) and radioactivity. From what are the indicators of flakiness, the density of the ramming of the material will depend.

Resistance to high temperatures depends on the number of freezing cycles and further thawing. Strength characterizes rubble as resistant to mechanical influences on grains (crushing, deterioration, compaction are checked). There are several strength groups:

- high is marked with M1200-1400,

- Sturdy - M800-1200,

- medium strength - M600-800,

- weak-strength - M300-600,

- very weak (M200).

Typically, the choice of brand of this natural material is determined by the degree of radioactivity. Suitability for use must be confirmed by mandatory certification and conclusions of sanitary-epidemiological institutions.

The structure of granite rubble contains spar, mica and quartz, the combination of which causes resistance to temperature changes.

The scope of granite rubble is quite wide:

- in the finishing works due to different shades of rubble,

- in the laying of trails,

- in the creation of concrete and reinforced concrete products,

- in the arrangement of the foundation of buildings,

- in the construction and repair of motor roads and railways,

- The smallest fraction is used for landscaping and decorative finishing of buildings.

The cost of granite rubble depends on its fraction - the smaller the fraction, the more expensive the price of cubic meter of material. The average cost of the small fraction is 2200 rubles per cubic meter, and the large one - 2000 rubles.

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