As a high-grade building decoration material, Stone is widely used in interior and exterior decoration design, curtain wall decoration and public facilities construction. The stones commonly found on the market are mainly divided into natural stone and artificial stone and marble.
Natural stone is divided into slate and granite according to its physical and chemical properties. Artificial stone is divided into terrazzo and synthetic stone according to the process. The terrazzo is forged from cement, concrete and other raw materials; the synthetic stone is made of natural stone gravel as raw material, and is pressed and polished with a binder. The latter two are made by hand, so the strength is not as high as natural stone. Stone is a high-grade product of architectural decoration materials. Natural stone is roughly divided into granite, slate, sandstone, limestone, volcanic rock, etc. With the continuous development and advancement of technology, the products of artificial stone are constantly changing, and the quality and beauty are not inferior to natural. Stone. With the development of architectural design, stone has already become one of the important raw materials for construction, decoration, roads and bridge construction.
Chinese name stone
Foreign name Stone
Use of construction
Main classification Natural stone and artificial stone
In the industrial upgrading, China's stone industry needs technological transformation of product innovation, management innovation, and marketing innovation. At the same time, it must adapt to the needs of beautiful China's construction, and focus on resource conservation and clean production.
Due to the different parts decorated with natural veneer stone, the type of stone used is different. When used for outdoor building decoration, it needs to withstand long-term wind, rain, sun and sun. Because granite does not contain carbonate, it has low water absorption rate and strong weather resistance. It is best to use various types of granite stone; The decorative stone on the floor of the hall requires stable physical and chemical properties and high mechanical strength. The granite stone should be preferred; it is used for the decoration of the wall skirt and the home bedroom floor. The mechanical strength is slightly poor, and the marble with beautiful patterns is used.
All kinds of stone are different, and some stones are chemically decomposed under the action of high temperature.
(1) Gypsum: Decomposes at more than 107 °C.
(2) Limestone, marble: decomposes at greater than 910 °C.
(3) Granite: cracked at 600 ° C due to uneven heating of the constituent minerals
Expansion and contraction
It is also thermal expansion and contraction, but if it is cooled after being heated, its shrinkage cannot return to its original volume, and a part must be retained as permanent expansion; the US arsenal has been tested from 0 °C to 100 °C and then lowered to 0 °C.
At minus 20 degrees Celsius, freezing occurs, and the water expansion in the pores is 1/10 larger than the original volume. If the rock cannot resist the force generated by such expansion, the phenomenon will be destroyed. Generally, if the water absorption rate is less than 0.5%, the frost resistance is not considered.
Stone has good durability and structures constructed of stone have a permanent possibility. Ancient people have long recognized this, so many important buildings and monumental structures are made of stone.