Limestone crushed stone for construction works

Limestone crushed stone is used in finishing works, as well as in the production of mineral fertilizers and lime. This material is produced by the method of crushing and further sifting the rock, which is limestone.

general description

The most expensive and high-quality crushed stone is one that is obtained in the processing of rocks that are based on calcium carbonate. All kinds of impurities and additives reduce the level of quality and useful characteristics of limestone crushed stone. This material does not have high strength, but such properties as low cost, frost resistance, and environmental safety make it the most competitive material for construction work.

Specifications

Limestone crushed stone has excellent resistance to temperature changes, it has good strength and acts as an environmentally friendly material. Frost resistance and water absorption of rubble are at a high level. If the amount and percentage of impurities is small, the material has a reddish, brown or yellow tinge. If you compare with granite, limestone crushed rock has low radioactivity and high adhesion. In the end, it is possible to obtain dolomite crushed stone, which has high qualities of strength and durability. Quite often it is compared with granite gravel also on the principle of bulk density. The limestone variety has a less low bulk factor. This allows to minimize its consumption. The price of such material is much lower in comparison with similar products of other breeds and materials.

Basic properties

Limestone crushed stone has several varieties. The most relevant is the cuboid, its flakiness index is within 10%. A mixture of such a material is practically devoid of voids, this indicates a low consumption of the binder solution. Such a variety is widely used as a facing stone in the construction of roads, which will not have an impressive load. The density of the material does not exceed 80 MPa. Its frost resistance is high enough, that's why crushed stone can undergo up to 125 cycles of defrosting and freezing. Water absorption varies from 1 to 2.2%. If we talk about abrasion, then it is equivalent to a limit of 0.3-0.8 grams per centimeter square. An important quality is the specific weight, it ranges from 1260 to 1320 kilograms per cubic meter.

Quarrying

In order to make limestone crushed stone for construction work, it must be obtained. The deposits of the material are numerous, for this reason it is economically advantageous to acquire it from nearby quarries. The extraction is carried out in an open way, after small blasting. At the next stage, the rock is loaded with an excavator, and large formations enter the crushing machine. Together with fine fractions, sieving is carried out using a special screen. Initial sieving and further sorting to the relevant fractions are carried out by means of sorting units, "Grohot" can serve as an example. After this, it is possible to obtain a material that can have a fine, medium or coarse fraction. When sorting, modern equipment is used that allows you to obtain and determine the scope of use.

Application

When manufacturing the described material, orienting to GOST, limestone crushed stone can be used for various jobs. If it is a question of large-fraction elements, then they are used in the construction of roads. While small or medium-sized is more suitable for piling up the top layers of roads or arranging reinforced concrete products. Before acquiring the material, it is important to familiarize yourself with the relevant certificates and regulatory documents, where the quality characteristics and reliability of the material are prescribed. Before you buy granite, limestone, experts advise to pay attention to its radioactivity. However, if you have quality material in front of you, then this indicator will be extremely low, which indicates ecological compatibility and safety.

Application of different fractions of crushed stone

Crushed limestone (GOST 8267-93) can have different fractions. If we are talking about the size of the elements from 5 to 20 millimeters, then before you the material is finely ground. It is used in the manufacture of concrete mixtures. Ferro-concrete oversized structures are often produced using this fraction of limestone crushed stone. Widely used these materials in the facing of buildings, as well as the manufacture of lime. Crushed stone, the fraction of which varies from 20 to 40 millimeters, is applied most often in comparison with other varieties. As the main area of use is the ebb of the foundation, among other things, it is taken to equip the sites, as well as the tracks, which, after hardening, acquire a presentable appearance and retain their quality characteristics for a long time. The main direction of the use of this material is the manufacture of reinforced concrete structures and the construction of roads, which in the process of exploitation are subjected to intensive impact.

The use of coarse fraction chips

If the material elements have dimensions ranging from 40 to 70 millimeters, this indicates that it is used rarely. The main direction is a ballast layer or the arrangement of a gravel pillow. It is quite rare to see when the material of such a fraction is used for facade cladding. This can only be relevant for large projects.

Thus, the most popular is the rubble of the middle fraction. It acts as an indispensable building material, which has excellent binding characteristics and is an excellent filler. Among its features can be identified frost resistance, as well as maximum strength, which allows the material to function under conditions of a capricious climate with sharp changes in temperature and humidity.

Disadvantages and strengths

Before you buy crushed limestone M600, you should familiarize yourself with all the strengths and weaknesses of this material. First of all, it is necessary to remember that this kind of rubble is not so strong in comparison with gravel. However, the minuses end there. In view of its harmlessness, it is successfully used for the construction of various premises and houses for residential purposes. Mining is made easier compared to similar materials, this has a positive effect on the cost. Limestone crushed stone has low strength, which is why it is inappropriate to use it in the construction of large objects, which is not always convenient. However, it excellently demonstrates its best characteristics in the production of small-size reinforced concrete structures.