Preventive measures for stone formation Bai Hua

We often see that there are some white crystals from stone to flow out of the seams, which is white China. Here, we get to know about the issue on the White China. Stone White China is in the stone surface or at a white powder or caulk sagging phenomenon often occurs in outdoor or water rich place, flowery table, outdoor stairs, exterior caulk the Department. When the stone with a wet method to install, its backfill cement mortar in an alkaline substance such as calcium hydroxide, dissolved out by the amount of water penetration to the stone / surface or caulk inaccuracies, calcium hydroxide and then with the air carbon dioxide or SO2 in sulfuric acid rain compounds react to form calcium carbonate or calcium sulfate, when the water evaporates, calcium carbonate or calcium sulfate crystallization formed on Bai Hua. stone coated steel roofing tile
Bai Hua stone formation factor and water spots similar to a lot of water, alkali metal ions are the causes of white China, where water plays a role destroy with the alkali metal ions dissolved by the capillarity penetrate to the surface of the stone or caulk inaccuracies, further form Bai Hua. Therefore, prevention of water and alkali metal ions penetrate to the surface of the stone or caulk inaccuracies, you can prevent the occurrence of white China.
Measures to prevent the formation of white China are as follows:
First, the stone should be applied prior to installation for protection works (front, five-sided or six-sided, depending on project requirements), to prevent excessive inhalation of stone water to prevent flooding from the stone facade or groundwater sources into the stone beneath the cement mortar, in order to avoid alkali metal ions cement mortar into the stone, causing Bai Hua.
Second, the selection of suitable stone to fill the gap material, and the right to apply for construction method. Good quality caulking materials and facilities for the correct method to prevent the occurrence of caulk at the White China.
Third, in the deployment of cement mortar, the use of low water-cement ratio or add a plasticizer. Reduce excessive moisture to avoid the occurrence of a white China.
Fourth, in the cement mortar adding water repellent, can avoid a lot of water dissolved metal ions are formed on the surface of stone from oozing white China. stone coated steel roofing tile
Fifth, the aggregate selection of pollution, such as to avoid the use of calcium, magnesium, sodium and other ions more sand and avoid mineral groundwater more mixing water, reduce the metal ion source, reducing the chance of white bloom .