Some high-build coatings result in a very slippery surface when wet and may not be suitable for pedestrian or vehicular traffic.Įpoxy resins are commonly used repair materials that generally have good bonding and durability characteristics and can be mixed with fine aggregates to improve abrasion and skid resistance.High-build coatings alter the appearance of the surface and may be pigmented.Suitable for use against rain, salts, and mild chemicals.Reduce reinforcement corrosion in repair work.High-build coating is used for decorative or protective barrier systems.3: High Build Floor Coating 4.1 Functions of High-build Coating The coating material must be durable and the bond between the coating and concrete substrate must be strong.įig. On floors, resistance to abrasion and punctures and resistance to mild chemicals (salts, grease and oil, and detergents) are also important. For exterior environments, the coating must be resistant to oxidation and UV and infrared radiation exposure. Breathability is often an important factor when selecting a protection material on exterior walls and slabs-on-ground. High-build coatings are materials with a dry thickness between 0.25 mm and 0.75 mm applied to the surface of the concrete. Certain paints, whether oil-based or latex-based (such as styrenebutadiene, polyvinyl acetate, acrylic or blends of these with other polymers dispersed in water), can also be included if the resulting thickness of layer is less than 0.25 mm.High molecular weight methacrylate(HMWM).These products are affected by UV exposure and wear under surface abrasion: Some of these products depend on solvents to work and may have problems with environmental quality. They also may or may not permit the transmission of water vapor.Reduce the intrusion of water, chlorides, and mild chemicals.The hydrophobic nature of some of these products may reduce the movement of moisture into narrow cracks and some of these products may fill dormant cracks, and are effective in filling (not bridging) small, nonmoving cracks. Surface sealers do not have significant crack-bridging capabilities. Pigmented or naturally colored paints are used according to the requirements, while transparent paints result in a wet or glossy appearance. The finished thickness may be 0.03 to 0.25 mm. Sealers and paints are applied on the surface of concrete where it adheres. 2: Application of Corrosion Inhibitor for Concrete Surface 3. The effectiveness and life expectancy of these materials varies with the properties of the concrete, site conditions and type of inhibitor material.įig. Surface-applied corrosion inhibitors are designed to reduce the rate of corrosion. Some of these products are solvent-based (that can cause air-pollution) and others are water-based:ĭifferent equipment can be used apply penetrating sealer to the concrete substrate and proper surface preparation is important for successful application: Surface hardeners ultra-violate, wear, and abrasion resistance are generally good when compared with coatings or membrane systems.ĭifferent types of penetrating sealers are presented below.Penetrating sealers are effective for protection in two ways: 1: Concrete Surface Treated with Penetrating Sealer 1.1 Functions of Penetrating Sealer The sealants do not usually hide the surface flaws.įig. The appearance of concrete surface is usually not affected by applying these sealers, only slight change in color may take place. Penetrants do not have crack-bridging capabilities, but the hydrophobic properties imparted by some of these products may reduce the intrusion of moisture into narrow cracks. Deep penetration of sealers is usually not an important factor, but it is desirable for abrasion resistance of surfaces. The depth of penetration varies by the product, the size of the sealer molecule, and the size of the pore structure in the concrete. Penetrating sealers are materials that are generally absorbed within the repaired concrete. This can be done by restricting corrosion which can be achieved through reducing the existing moisture level in the concrete and preventing further ingress of moisture and chlorides. The purpose of surface treatment application is to improve surface aesthetics, repair, protect, and consequently increase service/ wear life of various surfaces.
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