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Marble is a limestone found in various colors
When limestone is long underground and under high heat and pressure, it is transformed into a marble. The main ingredient in marble is calcium carbonate. Some types of marble contain 99% calcium carbonate. The presence of aluminum and magnesium in marble results in a variety of colors.
Because of its special beauty, marble has always been used in sculpture, construction works and decorations.
Other types of marble gems are green stones that are used in Iran more often in religious places.
Marble gems are used as unique materials to decorate large buildings and sculptures.
These rocks have different minerals and colors, and their main features include beautiful colors and fine gloss. For decades, it has been used in building. These types of rocks are especially applicable in decoration, stairs, interior, column and floor.
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Nowadays, with the advent of science and technology, stone extraction has become easier and its use in the construction industry has increased dramatically. Rocks have unique capabilities that are not comparable to other building materials. Among them, they can be durable and highly resistant, good solderability, high abrasion and impact resistance, ability to cut and polish, washability, color stability, heat and humidity resistance, suitable tensile and bending strength, non Penetrability, resistance to weather changes, hardness and high compressive strength, resistance to acidic and alkaline materials, and so on. The stone is used to cover the interior walls of the building, the facade, the pavement, the walls and the foundation, the floor of the street, and the pavement and decorations.
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Features of suitable building stones for sale
Stones are used extensively due to their resistance to various factors in building. In the present era, due to the ease of stone mining operations, its use is expanding and used in various places of the building.
Floor of the building and stairs
The stone used for stairs and flooring will be exposed to wear and shock, so it should be very hard and have a high abrasion and impact resistance. The stone used for this part of the building should be cut in one direction, such as sedimentary and metamorphic rocks that have the advantage. In addition, rock floors and stairs due to exposure to contamination should have a small porosity, so that they can not be damaged by washing with detergents and pouring acidic substances or playing on them. Amongst the rocks that are suitable for the floor and the stairs, quartzite and gneisses can be mentioned.
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Environmental pollution and its effect on building stone
Calcium carbonate rock is particularly susceptible to acidic environments. Sulfur oxide produces sulfuric acid in a humid environment and oxygen in the air, which affects calcareous stones and produces calcium sulfate. Calcareous limestone and limestone sandstones are more sensitive in this regard.
In the case of limestone, the calcium sulfate produced at the surface is washed with water. But on surfaces that can not be washed, the surface is blackened by the soot and is converted into hard shells and bulges that contain round limestone around it. In magnesium calcareous stones, the formation of magnesium sulfate accelerates the process of corruption.
In sandstones, pores are filled with gypsum (calcium sulfate), hardened shells often collapse due to the difference in thermal expansion. Silica sandstones, although not directly damaged by the invasion of acids in the air, but the gypsum produced by limestone causes them to break down due to evaporation due to crystallization in their surface.
Marble, which is essentially calcium carbonate, is attacked by acids in the air, and its polished surface is shrinking over time. But due to its denser and denser texture, it is less affected by crystallization.
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A guide to buying and installing a variety of building stone
When designing a building for a building you want to choose, then it’s good to know and consider the tips before buying. Knowing these tips before buying a building stone does not harm your finances and do not regret your choice.
The stone you choose is best suited to atmospheric conditions and weather conditions. For example, a rock that is installed in a cool, wet area, should have a low porosity. Because it may collapse due to cold and frost, or in areas where winds and storms are high, the stone you choose should have a high abrasion resistance.
You should know the mineral composition in the rock, because harmful minerals such as iron cause the rock to oxidise against weather and humidity, and it gets worn very soon, and this causes rock destruction in a short time.
The stone should have good adhesion to the mortar.
Its color must be stable and stable due to exposure to sunlight.
It is very important to note the absence of stones. To find that the stone is free from cracks, you can hear it sounding like a glass or stone after striking a stone.
Consider that due to the difference in temperature between night and day, as well as seasonal variation, as a result of expansion and contraction, if only the installation with slurry and cement is used, it may not be durable and not lasting. To avoid this, you can use a scoping or drying method to prevent stones from falling.
Considering that stone is one of the most important factors in appearance, it is one of the most important materials used in building industry and the choice of rock type and its design and implementation is one of the most important concerns of mass makers and respectable builders in this field. Industry is.