Natural stone characteristics and advantages analysis
Stone is a kind of high-grade building decoration material, mainly for decoration. Stone is the earliest building material in the history of human development. It has a history of tens of thousands of years. Because of its natural beauty, it is decorated with the indoor and outdoor environment of human beings. There are many stone building masterpieces left in the history of architecture. Fire resistance All kinds of stone are different, and some stones are chemically decomposed under the action of high temperature. (1) Gypsum: Decomposes when it is greater than 107 C. (2) Limestone, marble: decomposes when it is greater than 910 c. (3) Granite: At 600 C, it is cracked due to uneven heating of the constituent minerals. 2. Frost resistance 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, it will be destroyed. Generally, if the water absorption rate is less than 0.5%, the frost resistance is not considered. 3. Expansion and contraction Stone is also thermal expansion and contraction, but if it is cooled after heating, its shrinkage can not return to its original volume, and some must remain a permanent expansion; the US arsenal has tested from 00C to 1000C, then down to 00C, and measured permanent. The degree of expansion increases from 0.02 to 0.045%. 4. Compressive strength The compressive strength of stone varies depending on factors such as mineral composition, crystal thickness, uniformity of cemented material, load area, load and angle of cleavage. If other conditions are the same, a dense material in which the crystal grains are fine and bonded to each other generally has a high strength. Dense volcanic rocks have no difference in compressive strength after drying and saturated water (water absorption is extremely low). If it is porous and water-resistant cemented rock, its drying and moisture intensity are significantly different. There are two kinds of stone for architectural decoration: natural stone and artificial stone. It is mainly made of natural stone. It is a kind of high-grade decorative material. It is mainly used in the engineering with high decoration grade. The artificial stone belongs to the lower grade decoration material. It is only used in medium and low-grade interior decoration projects. The so-called marble refers to sedimentary or metamorphic carbonate rock, including marble, dolomite, limestone, sandstone, shale and slate. For example, the famous Chinese white marble is the dolomite produced by Fangshan in Beijing, the marble in Yunnan is the marble in Dali County, and the famous Dandong green is the serpentine petrosilicate. Similarly, as various types of magmatic rocks for stone mining, such as granite, andesite, diabase, chlorite, gneiss, etc., it is called granite. For example, the white granite of Beijing Baihuyu is granite, Jinanqing is gabbro, and the black granite of Qingdao is diabase. Artificial stone is a synthetic decorative material. According to the different binders used, it can be divided into organic artificial stone and inorganic artificial stone. According to the different production processes, it can be divided into four types: polyester artificial marble, composite artificial marble, silicate artificial marble and sintered artificial marble. There is a kind of marble called Xiaolanbao, also known as Pingnan G654. Xiaolanbao is a newly developed stone product sample/. small sapphire material with a small blue crystal point in the roadside development zone of Pingnan County. It is also called “blue starlightâ€. Because of the god-like import of "trees hanging ice flowers", it has the reputation of domestic "tree hanging ice flowers". Mainly used for exterior walls, countertops, outdoor squares (fire board). Is a good building decoration Among the four artificial stone decorative materials, organic (polyester) is the most commonly used, and its physical and chemical properties are also the best. To a large extent, it can replace the use of ordinary Wood Screws (wood Screws are not heat-treated) . At the same time, wood screws are the first by the AIDS to navigation technology production, not only save materials, but also more sharp thread. The range of applications in the fastener industry, the product is similar to the drywall screw as an important and huge sales variety, in furniture manufacturing and other industries widely used, but the use of the DIY market is still very limited. At present, domestic consumers in the building materials supermarket procurement of this variety, mainly for the installation of rails, hinges (such as 3.5 * 16, etc.) , with fish-type expansion installation (such as 4 * 40, etc.) and replace the installation of wood screws to make furniture, cabinets and so on. Better quality, choose Shanghai Hangtou Standard Parts factory to produce a better Yuan Leng Brand, quality, packaging, price, all aspects are more economical and affordable, plus claw cutting tail fibreboard screw is the improvement of ordinary fibreboard screw products, it is mainly from the thread design optimization, the pursuit of higher drilling speed, and the use of hard wood to solve the problem of easy to cause cracking, technical content is higher. Phillips pozi,squre torx,single,squre,double Nantong Safe Yawl Import &Export Co.,Ltd , https://www.ntsyspring.com