Granite rubble represents fragments of rocks having acute-angled shape.The material is formed as a result of natural weathering, and it consists of loose and weakly clusters.Debris can be up to 100 mm, and on the degree of fineness divided into several factions:
- 0-5 mm are used for finishing the interior, development paths and sports fields,
- 5-20 mm - a fine gravel screenings designed topreparation of concrete and structures thereof.It is used for everything foundations and supports for the bridge, and the web, covering roads and runways,
- 20-40 mm - this rubble, which is a mid-sized fragments.Used to create paintings for cars and railway transport, as well as laying the foundations of industrial facilities,
- 40-70 mm - a fraction of the material is characteristic of large size, used in the manufacture of concrete, as well as the design and production areas are large.
extraction is carried out pit method, first produced an explosion of granite and formed during the explosion lump is crushed.Grinding is done using special equipment that is placed in the crushing plant.The resulting fragments are sieved and divided into different factions.At the same time the smallest fraction of the most expensive in price.
crushed granite is durable, frost, flakiness (ie the definition of the form of debris from the perspective of the plane of their shape) and radioactivity.On what indicators flakiness will depend on the density of compaction of the material.
resistance to the effects of high temperatures depends on the number of cycles of freezing and thawing further.Strength characterizes rubble as resistance to mechanical stress on the grain (checked Crushable, wear, sealing).Identifies several grades:
- High is marked M1200-1400,
-Rugged - M800-1200,
- medium strength - M600-800,
- slaboprochnaya - M300-600,
- very slaboprochnaya (M200).
Typically, the choice of the brand of this natural material is determined by the degree of radioactivity.The suitability for use must be confirmed by obligatory certification and conclusions of sanitary-epidemiological institutions.
structure of crushed granite contains feldspar, mica and quartz, the combination of which causes resistance to temperature.
Scope of crushed granite is quite wide:
- finishing work thanks to the different shades of gravel,
- in laying tracks,
- in the creation of concrete and concrete products,
- in setting the foundations of buildings,
- constructionand repair of highways and railways,
- the smallest fraction is used for land improvement and decoration of buildings.
cost of granite rubble http://nerudr.ru/sheben.php depends on the fraction - less than a fraction, the higher the price of a cubic meter of material.The average cost of the fine fraction is 2200 rubles per cubic meter, and large - 2000 rubles.
