Most granites are hard and dense and thus are durable construction materials. It is resistant to water penetration and impact, and tolerates industrial environments. The appearance of granite is affected by the work done on the final surface, which may be hammered, chamottised, spiky or polished. The best-looking granite stone is a polished state that displays the beauty of color and the reflection of its crystals.
The stone staircase can be selected from any of the rock group of travertine, marble, stone, granite, or marble, but these rocks are purchased depending on the type of project and budget. For example, marble is recommended in the corridor and in very luxurious projects due to its high price. The use of stone granite is used for a staircase in a completely industrial environment (due to its high resistance to granite stone).
-Usually, water absorption is less than 1%
-The average marble content is 2.7 grams per cubic centimeter.
It has a moderate resistance and its elastic deformation is plastic. The compressive strength of the marble is between 19 to 140 MPa and its average compressive strength is about 110 MPa. Its compressive strength is between 15 and 6 MPa and its tensile strength is 4 MPa.
Travertine is one of the crystallized calcareous stones formed by the evaporation of calcium bicarbonate water in warm water springs. Generally, calcareous stones have variable texture, but most are fine-grained. Coarse grains are composed of large crystals or fossil fragments. The finest types are better off, and their weather resistance is better.
The Coope stone is a stone block that is separated from the chest of a mine and is generally cut in six cutters by special machines for processing in stone mills. Basically, rocks whose geometric shapes are regularly treated from the mine, such as rectangular cubes and large dimensions, are converted into slabs.
Slabs of stone are said to be of relatively large size, with slabs usually exceeding 120 * 220 cm. For the production of slabs, they should use healthy rocks of a large size, the so-called stone poplar. The cost of commissioning raw rock to produce slabs is approximately 2 times. The slab thickness is generally 2 centimeters higher.