Reasons for the formation of stone whiteness

Baihua refers to the phenomenon of white powder or sagging on the stone surface or at the joint filling, which often occurs outdoors or in places with abundant water resources, such as flower beds, outdoor stairs, and external wall joint filling.
When the stone is installed in a wet way, the alkaline substances such as calcium hydroxide in the cement mortar on its back are dissolved by a large amount of water and infiltrated into the surface of the stone or the joints are not filled properly. The calcium hydroxide reacts with the carbon dioxide in the air or the SO2 sulfate compound in the acid rain to form calcium carbonate or calcium sulfate. When the water evaporates, the calcium carbonate or calcium sulfate will crystallize and precipitate to form a white flower.
The factors that cause the formation of white hua are similar to water spots. A large amount of water and alkaline metal ions are the reasons for the formation of white hua, in which water plays the role of destroying the belt. After dissolving the alkaline metal ions, the capillary phenomenon penetrates into the surface of the stone or the joints are not solid, further forming white hua. Therefore, to prevent water and alkaline metal ions from penetrating into the stone surface or filling the joints is not solid, we can prevent the occurrence of whitewash.