Decryption of quality granite standards

Granite is a volcanic eruption of the lava in the molten state under considerable pressure to the surface of the crust to the surface of the crust, magma does not spray the ground, and slowly under the ground cooling and solidification formed after the tectonic rock, is a deep Igneous rock belongs to magmatic rock. Granite is igneous rock, also known as acid crystal deep diagenesis, is the most widely distributed igneous rock, composed of feldspar, quartz and mica, rock hard and dense.

Classification of Granite:

First, according to the type of minerals contained, can be divided into black granite, muscovite granite, horned granite, two mica granite;

Second, according to the structural structure points, can be divided into fine granite, granite granite, coarse granite, plaque granite, plaque granite, crystal cave granite and gneissed granite Stone and so on;

Third, according to the sub-mineral points, can be divided into tin stone granite, containing niobium iron granite, containing beryllium granite, lithium mica granite, tourmaline granite and so on. Common petrochemical, Yunying rock, electrical and petrochemical and other self-metamorphism.

Granite Features:

First, the granite structure is compact, high compressive strength, low water absorption, surface hardness, chemical stability, durability, but poor fire resistance.

Second, the granite is fine, medium grain, coarse grain granular structure, or plaque-like structure, the particles are uniform and fine, small gap (porosity is generally 0.3% to 0.7%), water absorption is not high (water absorption in general 0.15% ~ 0.46%), with good frost resistance.

Third, the hardness of granite, its Mohs hardness of 6 or so, the density of 2.63g / cm3 to 2.75 g / cm3 between the compressive strength of 100-300MPa, of which fine granite can be up to 300MPa or more, bending strength Generally in the 10 ~ 30Mpa. Granite is often in the form of rock, rock, rock and other forms of output, and by the regional tectonic control, the general size is relatively large, the distribution is also more extensive, so easy to mining, easy to large anise, and its joint development regular, Is conducive to mining the shape of the rules of stone.

Fourth, granite into a high rate of land, can carry out a variety of processing, plate can be a good fight. There are granite is not easy to weather, can be used for outdoor decorative stone. Granite texture texture evenly, although the color to the main color, but also very rich in red, white, yellow, green, black, purple, etc., and its relative color change is not large, suitable for large area of use.

From:Granite