Grades of protection and product solutions
A protective treatment for concrete surfaces is in principle selected on the basis of concrete quality and the external stresses to which it is exposed. In the case of high-quality concretes used in building construc- tion, such treatments in general simp- ly provide weather-proofing. In the case of lower quality concrete and severe exposure to pollutants, the emphasis is always on protecting the reinforcement from corrosion. Which grade of protection is to be applied is determined by an analysis of the actual state of the object.
1
2
Carbonation has nearly reached reinforcement.
Good concrete, very slight carbonation
Grade of protection: Weather-proofing
Grade of protection C: protection from penetration of CO 2 from the air Mode of action: The surface of the concrete must be sealed in such a way that gaseous CO 2 cannot penetrate (gas-tight coating). The pores and blowholes of the concrete surface cannot be closed simply by applying a coating. If CO 2 -proofing is to be effective, pores and blowholes must always be closed by filling (full-cover filling) prior to application of the coa- ting.
Mode of action: Thanks to their consolidating action (silicification), silicate coatings can provide long-term weathering protec- tion and weather-proofing for the con- crete surface. Shuttering board textures can be strengthened and so secured. Weather protection can be further enhanced by additional water-repellent substrate treatments.
Product solutions KEIM Concretal-Lasur
Product solutions KEIM Concretal-Feinspachtel with KEIM Concretal-C usable as additional water-proofing: KEIM Silan-100 KEIM Hydrophobin-2000
low-pigment or opaque KEIM Concretal-W usable as additional water-proofing:
KEIM Silangrund KEIM Silan-100
10
Made with FlippingBook Learn more on our blog