Crushed limestone is used in finishing works, as well as in the production of mineral fertilizers and lime. This material is produced by crushing and further sifting the rock, which is limestone.
general description
The most expensive and high-quality crushed stone is the one that is obtained in the processing of rocks 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 differ in high strength, but properties such 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, has good strength and acts as an environmentally friendly material. Frost resistance and water absorption of crushed stone are at a high level. If the amount and percentage of impurities is small, then the material has a reddish, brown or yellow hue. If we compare with granite, then limestone crushed stone is characterized by low radioactivity and high adhesive ability. Ultimately, it is possible to obtain dolomite crushed stone, which has high qualities of strength and durability. Quite often it is compared with crushed granite according to the principle of bulk density. The limestone variety has a lower bulk coefficient. This minimizes its consumption. The price of such material is much lower compared to similar products of other breeds and materials.
Basic properties
Limestone crushed stone has several varieties. The cuboid one is the most relevant, the indicator of flakiness in it is within 10%. A mixture of such material is practically devoid of voids, this indicates a low consumption of a binder solution. Such a variety is widely used as a facing stone during the construction of roads, on which an impressive load will not be exerted. The density of the material does not exceed 80 MPa. Its frost resistance is quite high, which is why crushed stone is able to undergo up to 125 defrosting and freezing cycles. Water absorption varies from 1 to 2.2%. If we talk about abrasion, then it is equivalent to the limit of 0.3-0.8 grams per square centimeter. An important quality is the specific gravity, it ranges from 1260 to 1320 kilograms per cubic meter.
Quarry mining
In order to make limestone crushed stone for construction work, it needs to be mined . Deposits of material are numerous, for this reason it is economically feasible to acquire it from nearby quarries. Extraction is carried out in an open way, after minor blasting operations. At the next stage, the rock is loaded using an excavator, and large formations enter the crushing machine. Together with fine-grained conditions, screening occurs using a special sieve. The initial sieving and further sorting into the appropriate fractions is carried out by means of sorting units, as an example, “Roar” can be made. After this, it is possible to obtain material that may have a fine, medium or large fraction. When sorting, modern equipment is used, which allows you to get and determine the area of use.
Application
In the manufacture of the described material, oriented to GOST, limestone crushed stone can be used in various operations. If we are talking about coarse-grained elements, then they are used in the construction of roads. While small or medium is more suitable for filling the upper layers of roads or arranging reinforced concrete products. Before purchasing the material, it is important to familiarize yourself with the relevant certificates and regulatory documents, where the qualitative characteristics and reliability of the material are prescribed. Before acquiring crushed granite, limestone, experts advise to pay attention to its radioactivity. However, if you have high-quality material, then this indicator will be extremely low, which indicates environmental friendliness and safety.
The use of different fractions of crushed stone
Limestone crushed stone (GOST 8267-93) may have different fractions. If we are talking about the size of the elements from 5 to 20 millimeters, then here is the finely ground material. It is used in the manufacture of concrete mixtures. Reinforced concrete oversized structures are often produced using this fraction of limestone crushed stone. These materials are widely used in the cladding of buildings, as well as in the manufacture of lime. Crushed stone, the fraction of which varies from 20 to 40 millimeters, is used most often compared to other varieties. The main area of use is the ebb tide of the foundation, among other things, it is taken for the arrangement of sites, as well as tracks, which after solidification acquire a presentable appearance and retain their quality characteristics for a long time. The main area of use of this material is the manufacture of reinforced concrete structures and the arrangement of roads, which are subjected to intense impact during operation.
The use of coarse gravel
If the elements of the material have sizes ranging from 40 to 70 millimeters, then this indicates that it is rarely used. The main direction is the ballast layer or the arrangement of a gravel pillow. Quite rarely it can be found when the material of such a fraction is used for facing facades. This may be relevant only for large projects.
Thus, crushed stone of the middle fraction is considered the most popular. It acts as an indispensable building material, which has excellent binding characteristics and is an excellent filler. Among its features we can distinguish frost resistance, as well as maximum strength, which allows the material to function in a moody climate with sharp changes in temperature and humidity.
Cons and Strengths
Before you purchase crushed stone 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 type of crushed stone is not so strong in comparison with gravel. However, the cons end there. Due to its harmlessness, it is successfully used for the construction of various premises and residential buildings. Mining is easier compared to similar materials, this has a positive effect on cost. Limestone crushed stone has low strength, which is why it is impractical to use it in the construction of large facilities, which is not always convenient. However, it excels in showing its best features in the production of small-sized reinforced concrete structures.