(One Hundred Questions About Waterproofing) #5 What is "wall cancer"? How is it formed? How can it be cured?

Answer:

The term "wall cancer" is not mentioned in dictionaries or technical literature in China or abroad. It is purely a vernacular term used by ordinary mud plasterers and painters, meaning "uncurable" or "incurable" is an exaggerated term. In fact, there is no such thing as incurable wall cancer in buildings themselves.

(一) There are two types of wall cancer:

1. Because the relative temperature or relative humidity causes water to form a wall-like condensation in the indoor air, which causes wall paint to mold.(Molds)Corrosion(Corrsion)The phenomenon of waiting.
   1. Wall cancer caused by water infiltration in the exterior wall structure—metallic alkali within the concrete or cement plaster layer(For example: Sodium, magnesium, calcium, and potassium)Of which is calcium hydroxideCa(OH2)The most easily dissolved by water, then carried to the seepage outlet to "dissolve" crystal particles.(Crystal growth phenomenon)Then when there is carbon dioxide in the air, it crystallizes into calcium carbonate crystals and accumulates on the wall, forming what is known as limestone cancer. If this phenomenon occurs repeatedly, it also causes the carbonate crystals of limestone to form.

(二) Wall cancer treatment method:

• Strengthen the brick structure:

• RCStructure: