The Function of Dulux Architectural Coatings in the Curtain Wall of Yuanda Building

Architectural coating is a new functional architectural coating newly developed in China in recent years, and its application is increasing rapidly. Mainly used for painting the external walls of buildings. In addition to beautifying, decorating and protecting, it also has the function of covering cracks in the external wall and preventing water from infiltrating into the wall.

The application and development of elastic architectural coatings are closely related to the common leakage phenomenon of external walls.

The exterior walls of fluorocarbon buildings are mostly made of concrete, cement precast panels or cement-based block materials.

Before painting architectural coatings, most of the walls are leveled with cement mortar and plastered with cement mortar or cement slurry.

Cement is an inorganic brittle porous material. Because of its low tensile strength and almost inevitable volume shrinkage from wet state to dry state due to water loss, the mortar plastering layer often cracks, which is its inherent performance defect.

In addition, when the cement base of the wall is affected by environmental factors such as temperature change, dry-wet alternation and freeze-thaw cycle, cracks often occur.

The harm of this kind of crack to the building is that when there is water erosion, water will go deep into the crack and penetrate into the wall through the crack.

At this time, if it is damaged by freezing and thawing, it will produce more cracks or make the damage of cracks more serious.

For example, it may cause corrosion of steel bars in concrete and accelerate carbonation of concrete.

When the situation is serious, water will penetrate into the interior of the building and even affect the use function of the building.

Therefore, the leakage of the external wall of the building is considered to be a common problem of the building.

Wall leakage will also have a negative impact on wall decoration.

After the wall leaks, water seeps into the wall base and dissolves soluble salts, alkalis and other substances. These dissolved substances will spread to the surface with the migration of water and remain on the surface after evaporation. For colored paints or other decorative materials, these residues will produce irregular "white spots" or uneven pollution, which are generally called "pan-alkali" and "surface frosting", and are also common decorative defects.