If you are looking for more information regarding anti carbonation paint you are in the right place. Below, our technical team would like to introduce the effects of carbonation on concrete in exposed areas.
Where Can Carbonation Happen?
Generally, carbonation happens around areas such as car parks or along busy roads. Promain are often contacted by contractors looking to restore dilapidated columns, walls and pillars in parking areas. Customers also request advice on masonry coatings for high street buildings alongside high traffic areas.
What Exactly is Carbonation?
Concrete is a highly alkaline material. If uncarbonated concrete has a pH in the region of 12.6. Carbonation starts on the surface of the concrete and can ultimately reach the depth of the steel reinforcement. Reinforcement bars are a requirement in most concrete structures. Concrete is strong in compression but weak in tension. Therefore, the incorporation of reinforcement provides extra tensile strength. The alkaline state of the concrete provides a passive resistive layer to the surface of the steel reinforcement that prevents corrosion.
Once concrete comes into contact with carbon dioxide and other pollutants within the air, then a reaction may occur. Carbon dioxide can form carbonic acid with the water in the cement that then neutralizes the alkaline state of the concrete. If this happens, then carbonation moves through the concrete as a front that gradually reduces the pH value to 8pH; neutral is 7pH. However, corrosion to the reinforcement can occur if the pH value falls below 11pH.
Different factors determine the time frame of carbonation, such as the quality of the concrete. For example, if the cement is very porous or has low cement content then the time frame will be significantly quicker than if the concrete is not very porous and has high cement content.
Carbonation Prevention Using Anti Carbonation Paint
Preventing and slowing down carbonation in concrete is quite simple. You can apply anti carbonation paint to the cleaned surface of the concrete. This will prevent the ingress of carbon dioxide and other pollutants. This method should prevent carbonation for approximately 10 years.
Promain’s Top Anti-Carbonation Paint
Below we have listed a few of our most popular anti carbonation paints. Hopefully, this will help customers decide which solution is best for their requirements.
Mapei Elastocolor Pittura Paint
Elastocolor Paint is a single component acrylic resin-based paint in water dispersion. It forms a film on the surface due to the action of natural light. Once completely dry, Mapei Elastocolor Paint forms a flexible finishing coat. It is impermeable to water and aggressive agents in the atmosphere (CO2 – SO2). However, Elastocolor remains permeable to vapour. Suitable for anti carbonation use.
Elastocolor Pittura Paint has excellent resistance to ageing, freezing weather conditions and de-icing salts. The photo-chemical film which forms makes it very difficult for dirt to remain attached to the surface.
Glixtone High Performance Masonry Paint AC1
AC1 Smooth Masonry Paint is a high performance, water based paint coating. You can use AC1 on new build housing projects and over existing masonry paints. AC1 offers anti-carbonation properties that provide outstanding level of resistance to carbon dioxide and other acidic gases. Glixtone AC1 has a life expectancy in excess of 30 years.
As well as offering you a long lasting service, AC1 is highly resistant to UV light, oil, grease, alkali, salt, carbonation (acid) and dirt and is also moisture vapour permeable. It works to resist against blistering and flaking due to its micro-porous nature.
Rustoleum Murfill Waterproofing Coating
Rustoleum Murfill Waterproofing Coating is a paint for walls, a high performing elastic waterproof coating designed for the protection and beautification of exterior walls and façades. This paint offers 400% elasticity and moves with the surface without cracking, flaking or peeling. Available in a variety of colours and special tints may be available on request.
Sika Sikagard 550W
550W is used for protection and enhancement of concrete structures (normal and lightweight concrete), especially exposed outdoor concrete surfaces with a risk of cracking.
Remmers Concrete Acrylic Betonacryl
Remmers Concrete Acrylic, particularly when combined with Remmers Impregnation Primer, meets the requirements for use as a CO2 inhibiting and water repelling protective coating for renovation and repair measures on concrete surfaces. Cement-bound render surfaces and fibrated cement boards can also be coated with Remmers Concrete Acrylic.
Because of its high standard of development, Remmers Concrete Acrylic is distinguished by a wide range of properties. In spite of its high CO2 diffusion resistance, Remmers Concrete Acrylic coatings have good water vapour diffusion values. Concrete Acrylic protects the substrate in an optimal way against rain. The coating is driving rain and splash water. The material is also non-yellowing, extremely weather resistant and completely saponification stable.
Mapei Antipluviol W
Antipluviol W is a milky, silane and siloxane-based dispersing agent in watery emulsion, characterised by its high capacity to penetrate all absorbent mineral materials used in the building industry to make them water repellent.
Antipluviol W is ideal for the restoration treatment for damp rendered walls exposed to the eroding action of rainwater. It provides a colourless, water-repellent protective layer for historical buildings of architectural interest. Also suitable as a water-repellent treatment for walls, facing bricks and natural stone.
Are you looking for more info regarding anti-carbonation coatings? Contact our technical team today on 01462 421333. Alternatively, view our anti-carbonation paint category on our website here: