Redispersible latex powder solves the problem of wall efflorescence：
Alkali efflorescence is one of the concerns within the dry-mix mortar industry. It affects the aesthetics of exterior finishes and, with the increasing prevalence of high-rise and super-high-rise buildings, makes cleaning facades more challenging. It is imperative for professionals in the construction industry to pay close attention to this issue and take preventive measures at various stages to avoid the occurrence of alkali efflorescence.
I. What is Alkali Efflorescence?
In simple terms, alkali efflorescence refers to the alkaline substances within the wall, which crystallize as water vapor evaporates, resulting in frost on the wall surface.
II. Problems Caused by Alkali Efflorescence
Alkali efflorescence leads to the peeling of putty.
Restoration of ancient buildings becomes challenging due to alkali efflorescence.
Alkali efflorescence adversely affects aesthetics.
III. Suggestions for Alkali Efflorescence Prevention
Add Redispersible Polymer Powder (RDP)
Adding redispersible polymer powder causes the hydration reaction products to bond together, forming a complete mesh structure. This reduces the number of interconnected pores, and the dense polymer film hinders water migration.
Surface Sealing
Use waterproof coatings to protect the surface layer. This method is widely adopted, but it comes with increased costs and additional construction procedures.
Incorporate Alkali-Absorbing Powder
Alkali-absorbing powder with micrometer-sized particles clogs capillaries, reducing the probability of water migration and gradually eliminating alkali efflorescence.
IV. How to Avoid Alkali Efflorescence in Construction
Before construction, avoid excessive water spraying on the base surface. Construction should be avoided in rainy or foggy weather.
Pay attention to joint filler construction: extensive cleaning should only be conducted after the joint filler has dried completely to prevent premature alkali efflorescence.
When using hydrochloric acid for facade cleaning, ensure the concentration does not exceed 10%. After cleaning, rinse immediately with a large amount of water to prevent secondary alkali efflorescence caused by acid penetration.
Note: This translation may be subject to further refinement based on specific context and terminology preferences
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