White alum is made by processing and refining the sulfate mineral alunite. Mainly containing hydrated potassium aluminum sulfate, this product is in irregular block or granular shape.
The function of the compound waterproofing agent is actually to fill the gaps in the concrete, thereby making the concrete waterproof.
Alum contains aluminum ions, which hydrolyze into aluminum hydroxide. Aluminum hydroxide is a very good surfactant, which can form a film on the surface of vermicelli, which is beneficial to the loosening of vermicelli.
Alum, also known as alunite, is an inorganic compound with the chemical formula Al2(SO4)3. It has astringent, pore-reducing, and sterilizing effects.
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