The specific gravity of granite ranges from 2.63 to 2.75, and its compressive strength ranges from 1050 to 14000 kilograms per square centimeter (15000 to 20000 pounds per square inch). Because granite has a greater strength than sandstone, limestone, and marble, it is more difficult to excavate. Due to the special conditions and firm structural characteristics of granite, it has the following common functions:
(1) With good decoration function, it can be used for public places and outdoor decoration.
(2) It has excellent processing functions: sawing, cutting, polishing, drilling, carving, etc. Its machining accuracy can reach 0.5 μ Below m, the luminosity reaches over 1600.
(3) Good wear resistance, 5-10 times higher than cast iron.
(4) The coefficient of thermal expansion is small and not easy to deform. Similar to indium steel, it is slightly affected by temperature.
(5) High elastic modulus, higher than cast iron.
(6) Good rigidity, large internal damping coefficient, 15 times larger than steel. It can withstand shock and shock absorption.
(7) Granite is brittle and only partially falls after damage, without affecting the overall straightness.
(8) Granite has stable chemical properties, is not easily weathered, and is resistant to acid, alkali, and corrosive gases. Its chemical properties are proportional to the content of silicon dioxide, and its service life can reach about 200 years.
(9) Granite is non conductive and non magnetic, and its field position is stable.