Knotted Netting,Brid Netting,Rope Netting Hengqu Metal Products Co., Ltd. , http://www.gzwiremesh.com
Two factors of "inside and outside" of stone lesions
When it comes to stone, it gives a hard, firm and reliable feeling. With its outstanding features, stone has been favored by consumers and is widely used in various decoration and decoration. But under this hard appearance, who would have thought that stone would be sick? The reason is nothing more than the influence of two factors, "inside and outside." Internal Causes of Stone Diseases Structural Structure of Stone: There are micro-cracks and hairs in natural stone. It will absorb fine dust and dirt in the air for a long time, and slowly penetrate into the stone due to capillary action, which greatly reduces the stone. The decorative properties and service life, the smaller the pores, the stronger the capillary action and surface adsorption. Relatively complex chemical composition: Some components in the stone are easy to interact with the external environment, causing erosion or variability of the stone. Stones generally contain iron components to varying degrees, and rust yellowing due to moisture erosion. The higher the iron content in the stone, the higher the rust height is. In addition, most of the natural marble's main components are carbonates, calcium carbonate and magnesium carbonate, as well as a small amount of basic oxides. Calcium carbonate and magnesium carbonate are relatively stable compounds. In a humid environment, they easily react with acidic oxides such as carbon dioxide, sulfur dioxide, sulfur trioxide, nitrogen dioxide in the air, and change the physical structure inside the marble. . Similar chemical damage will occur on Other stone materials. Lighter will make the surface of the stone tarnish, and even the color will fade and appear stains; in the case of heavy, the hardness of the natural stone will decrease and the surface will be weathered and peeled off. The external causes of stone lesions affect the decorative effect of the stone and the external causes of the service life, such as improper maintenance during mining and storage and storage; the influence of bonding materials used for installing stone and natural environmental factors. The impact of mining, processing, storage and transportation: such as the crack and mining method of stone is not scientific, the mining method is unscientific, it will greatly increase the probability of stone cracking; the iron tools used in processing may also leave hidden dangers for the rust of the stone, inappropriate The stone coolant will pollute the stone; improper maintenance during storage and transportation will also cause pollution such as rust and grass rope yellow. The effect of the bonding material used for installing the stone: If the wet stone is applied by the cement paste when installing the stone, the alkaline soluble substance in the cement will ooze out along the capillary pores of the stone due to the erosion of the rain, and Alkaline compounds such as Ca(OH)2 will chemically react with CO2 or H2O in the air to form CaCo3 crystallized on the surface of the stone to form a salting-out and pan-alkali phenomenon. In addition, some of the salts formed after the hydration of the cement have the characteristics of a desiccant, and after infiltrating the stone, the moisture in the air is absorbed to form a water spot on the surface of the stone, which seriously affects the appearance. In addition, the use of improper bonding materials, such as some stone glue, will also make the stone yellow. Environmental factors: Environmental factors include environmental pollution, acid rain erosion and freezing damage. Air pollution, acid rain and other man-made pollutants in the natural environment can cause pollution and corrosion to the stone. In addition, freezing damage is also an environmental factor that cannot be ignored. Because the stone is water-absorbing (even if it is used for dry hanging construction), in the cold winter, the weathering process is accelerated by freezing, so that the strength is reduced, which not only affects the use. Life expectancy also threatens personal safety. After the cause of the disease in the stone, we must find ways to prevent the disease and treat the diseased stone. For stones that have already developed lesions, it is necessary to use cleaning, grinding and coloring to control, restore the original appearance, and then do protective treatment, so as to treat both the symptoms and the root causes. Otherwise, the stone lesions will be aggravated until it is weathered, peeled off, etc., and cannot be used.