Wulian gray board, as a type of board, is often affected by external climate and environment in the external environment, and later evolved into a phenomenon of chemical weathering of the board. During the reaction process, many new substances will be produced in the Wulian ash board, which will damage the physical and chemical properties as well as the external appearance of the board.
1、 Water soluble chemical weathering. The minerals contained in the Wulian gray board will undergo certain chemical changes at a certain temperature after being soaked in water, which is called the hydrolysis of material particles in Wulian gray board. In fact, when the long plates in the rock slab are hydrolyzed, the alkali ions in the long plates are replaced by the H ions in the water molecules, and the H ions enter the lattice of the Wulian gray plate, forming new clay minerals.
2、 Oxidative chemical weathering. The metal minerals in the Wulian gray board react chemically with oxygen in the external environment, resulting in a series of cracks and discoloration of the board. The common reaction in Wulian gray board is oxidation reaction, and its basic principle is the interaction between the iron ore plate in Wulian gray board containing pyrite, pyrite, and iron ore with oxygen-containing substances. As is well known, after the installation of many lotus ash boards, various board diseases such as yellow rust and flow marks often occur. After a long time, these iron containing parts will have pits and cracks, and the strength of the dense areas will decrease.
3、 Karst reaction chemical weathering. Generally speaking, under the combined action of water and carbon dioxide, Wulian gray board granite, board gray board, Dali board, etc. will slowly generate calcium carbonate in the later stage, which will then dissolve calcium ions and carbonate free radicals. With the passage of time, under the influence of external environmental temperature and pressure, the appearance of Wulian gray board will exhibit phenomena such as whitening, cracking, and degradation. This phenomenon has been found to varying degrees in some buildings.
The above is a concentrated phenomenon that can easily cause chemical weathering reactions in Wulian ash boards. Only by doing the corresponding maintenance work well in the later stage can the board exert its great value and add lasting charm to our living environment.