Crushed stone - This Loose Grainy Inorganic Material

Crushed stone is a friable granular inorganic material with fractions larger than 5 mm. It is produced by the method of separating rocks, boulders and gravel, simultaneously produced by enclosing rocks or substandard wastes, for example, mining companies for processing minerals.

It is divided by origin - unnatural and natural. Produced from different rocks, therefore, they are divided into granite, lime and gravel. When dividing into classes of crushed stone, it is given a certain marking for certain more significant characteristics, rather than making a wider classification. For example, according to the shape of the stones of rubble, it is marked as cubed and, so-called, breamy. Cuboid crushed stone has a high resistance to wear and bumps, and flaky - guarantees excellent connectivity as a filler. However, in terms of density and strength, the granite variant prevails. It is used as a filler for concrete, the cargo of railway tracks, and even when creating automobile routes, etc. Depending on the purposes of use, different requests are made for such properties as hardness, bulkiness, fractional composition and presence of impurities. Granite crushed stone is produced by the method of crushing natural granite. It appears to be one of the most demanded building materials, without it no construction is feasible.

But, the spheres of its use are delineated by an increased radiation background and a relatively high price. If radiation is a property of granite, then the price is justified by the complexity of the crushing of this solid rock. To create it, granite is used, which is divided into fragments of various sizes: 0, 5 mm - granite chips used on tracks and playgrounds; 5 - 20 mm is the most popular grain size. The standard is a fraction of 20-40 mm, it is used for the manufacture of reinforced concrete products; 20 - 70 mm and 40 - 70 mm - a large fraction, it is used for concrete and construction of considerable buildings from it; 70 - 300 mm - rubble stone, used for finishing houses, swimming pools or baths. Gravel crushed stone is very popular in the construction industry as a filler of concrete and reinforced concrete products.

It is formed when sifting sand in quarries, and, like any other, during the crushing of rocks. The use of such a building material can significantly reduce the prime cost of concrete, while retaining all its characteristics. It is less radioactive than granite. In addition, this building material is used in the arrangement of roads and in the role of cargo for railways. In addition, it is freely used in landscape design - paving paths, pads, etc. By the way, for this purpose it is allowed to use both separately and a mixture of gravel and sand. While this coverage does not require significant costs. Limestone crushed stone or limestone or limestone, in contrast to all other varieties, is particularly economical and popular.

It is subdivided into conventional fractions of 5 - 20 mm, 20 - 40 mm, 4 - 70 mm. It consists of calcite, and forms it in consequence of the addition of lime. The most popular fraction is 20-40 mm. From it, a substrate is prepared for laying on top of the asphalt and in the manufacture of reinforced concrete products.

There is such a situation, as collateral crushed stone. After crushing "construction debris", more concrete than the old asphalt, brick or concrete, we acquire this by-product building material.