The granite structure is compact, with high compressive strength, low water absorption, high surface hardness, good chemical stability and durability, but poor fire resistance. Granite is a granular structure with fine, medium or coarse grains, or a plaque-like structure. The particles are uniform and fine, the gap is small (the porosity is generally 0.3% to 0.7%), and the water absorption rate is not high (the water absorption rate is generally 0.15). %~0.46%), with good antifreeze performance. The hardness of granite is high, its Mohs hardness is about 6, and its density is between 2.63g/cm3 and 2.75g/cm3. Its compressive strength is 100-300MPa, and fine-grained granite can be as high as 300MPa or more. At 10 to 30 MPa. Granite is often produced in the form of rock foundations, rock strains, rock blocks, etc., and is controlled by regional geodetic structures. Generally, the scale is relatively large and the distribution is relatively wide. Therefore, it is easy to mine, easy to produce large materials, and its joint development is regular. It is conducive to the mining of stone with shape rules. Granite has a high rate of desertification and can be processed in various ways. Also, granite is not easily weathered and can be used as an outdoor decorative stone. Granite has a uniform texture, although the color is mainly light, but it is also rich in red, white, yellow, green, black, purple, brown, beige, blue, etc., and its color changes little, suitable for large The use of the area.