Limestones are very popular in the market of construction and finishing materials today. In spite of the fact that this material is very fragile and whimsical, it processed in a special way is used in internal and external finishing and also during creation of waterproofing constructions.
Limestone is a certain sedimentary rock as which main component serves calcium with a small share of different impurity of clay, silicon and even skeletons of microorganisms. In the nature beige or slightly yellowish limestone, depending on type of the impurity prevailing in breed, as a rule, meets, it is possible to see pink shades less often.
Types of limestone
On the direct origin material limestone happens: - organogenic, that is formed due to active connection together of various remains of organic character,
- chemical, arising by means of release of calcium from various solutions, - detrital, formed by concentration of fragments of the oldest calcareous sedimentary rocks.
Typical limestone the whole layers in pools of superficial sea lies, is more rare than fresh reservoirs therefore production of this most valuable breed is conducted in the easy, open way, that is with use of crowbars and ordinary excavators.
Limestone types
Depending on type of properties with which the nature allocated breed it is accepted to emit marble and also porous and especially dense limestone. The first is used, as a rule, for creation of various sculptures, he is a close relative of marble. Dense breeds - excellent material for production of finishing materials, it it is possible to meet on external facing of facades of many modern constructions and even in the Egyptian pyramids. In our country noted by severe climatic conditions special are used, breeds which are applied in construction of Orthodox churches for a long time are frost-resistant. And here porous limestones have the internally division on degree of granularity degree inherent in them. Distinguish, as a rule, shelly, oolitic and other porous materials. Shell rock is a material especially decorative as it is possible to guess, consisting of small shells, and it is accepted to call it chalk. Thanks to the special heat-insulating characteristics, durability, special ease in processing and durability, limestone became a basis for creation of many construction materials. It can be processed in any direction, it perfectly gives in to cutting, splitting, a file. The concrete and lime used for construction of the bases of the building also are derivatives of usual limestone. Limestone and in food, both petrochemical, and tanning, and even paint and varnish industry is applied, limestone is an irreplaceable basis of many necessary mineral fertilizers, is used for production of soda.