Waterproof coating construction methods and types

First, waterproof coating construction Polymer-a cement waterproof coating, acrylic waterproof coating, polyurethane waterproof coating construction operation is not easy to lead to deep defects, it is necessary to repeat its preventive measures.

1, the film produces air holes or bubbles: caused by the stirring method and mixing time is not good, should adjust the stirring speed, stirring time to 2-5min is appropriate.

2. Pay attention to grassroots processing, the grassroots must be smooth, solid, clean, and there must be no floating sand or dust.

3, polyurethane waterproof coating film in the reaction process to produce CO, gas, each coating is too thick and other reasons, can make the coating produce air holes or bubbles, the formation of weak parts of the leakage of water. Therefore, the coating thickness should be strictly controlled during construction.

Second, the type of waterproof coating 1, polymer cement waterproof coating. It is a kind of volatilization-curing coating, which is mainly divided into two types: Type I, with polymer emulsion as the main component, adding a small amount of inorganic active powder, and curing to form a flexible coating, which can be applied to the water surface as a waterproof layer; Type II, mainly inorganic active powder such as mud, adding a certain amount of polymer emulsion coating, cured to form an elastic cement coating, can be applied to the water surface and the back surface waterproof construction.

2, acrylic waterproof coating. It is a volatilization-curable coating and has good weather resistance. It is suitable for waterproof construction of exposed, non-exposed areas and water-facing surfaces. Water-emulsion color acrylic waterproof coating has both decorative functions and is suitable for waterproofing and decoration of roofs and walls. Polymer-cement waterproof coating and water-emulsion colored acrylic waterproof coating can be applied on the surface of wet (no water) or dry base layer. Water-based paints with a water resistance of less than 80% shall not be used for waterproofing of long-term soaking water in basements.

3, polyurethane series coatings. It is a reaction-curing coating, with good overall performance, high strength, high elongation, good elasticity, and good adhesion and sealing performance. One-component polyurethane coatings rely on the absorption of air and the moisture of the base layer and the action of the catalyst. They can be applied on the surfaces of wet or dry bases. When multi-component polyurethane coatings are applied, they must be prepared on site and should be applied on the surface of dry bases. Application of polyurethane waterproof coating must pay attention to choose low toxicity or non-toxic solvents and strictly limit the amount of use, reduce the impact on the atmospheric environment and the impact on personal safety polyurethane waterproof coating should be applied in non-exposed waterproof engineering.

4, cement-based penetrating crystalline waterproof coating. It is a rigid waterproof coating material composed of Portland cement, ordinary portland cement, and quartz sand, which is made of active chemical substances. The active chemical substances contained in the material are penetrated into the interior of the concrete with water as a carrier. Insoluble dendritic crystals are formed in the concrete to fill the capillary channels, thereby making the concrete dense and waterproof. This type of paint can be used for waterproof surface on the water side and waterproof construction on the back surface, and is suitable for construction on the wet base surface.