Common knowledge of coating: causes of problems in waterproof construction of polymer waterproof coating

Core tip: after asphalt waterproof and mortar waterproof, coating waterproof material is a new material widely used in industrial and civil buildings This kind of coating is composed of various synthetic polymer waterproof coatings and caulking materials, some of which are only applied with several layers of coating, some of which are placed with glass fiber, synthetic fiber or non-woven reinforced fabric between the coating to form a reinforced waterproof coating layer As the coating waterproof materials generally have good material property, good waterproof property, large adhesive force and extensibility, they can be constructed under normal temperature and can be applied to the structural base of various complex shapes, especially Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Coating home news: coating waterproof material is a new material widely used in industrial and civil buildings after asphalt waterproof and mortar waterproof This kind of coating is composed of various synthetic polymer waterproof coatings and caulking materials, some of which are only applied with several layers of coating, some of which are placed with glass fiber, synthetic fiber or non-woven reinforced fabric between the coating to form a reinforced waterproof coating layer As the coating waterproof material generally has good material property, good waterproof property, large adhesive force and extensibility, it can be constructed under normal temperature and can be applied to the structural base of various complex shapes, especially conducive to the sealing of internal and external corners, gutter free inlets and ends Therefore, it has been developing in the near future However, in recent years, the quality of the coating waterproof project can not be ignored The related problems are described as follows: 1 It can not be completely closed to the construction surface At present, solvent and water emulsion type are commonly used for coating waterproof, and solvent type waterproof materials are widely used, such as neoprene waterproof coating, recycled rubber asphalt waterproof coating, which can be sprayed or brushed separately or used in combination with glass fiber cloth, water emulsion type waterproof coating is also widely used, and some rubber or resin based waterproof coatings, such as neoprene - hiparene coating, poly Ammonia fat coating also has excellent performance, weather resistance and stability are relatively reliable However, in practice, it is easy to occur the phenomenon that the construction surface cannot be completely closed If the coating cannot be closely pasted with the construction surface, it does not have the waterproof function The main reason is that the construction surface is not dry, which is related to the ambient temperature during construction 2、 Whether the waterproof effect can be achieved depends on whether the uniform thickness of the coating film is obtained and whether the construction surface of the cement mortar is smooth Due to some errors allowed in the construction of concrete and cement mortar, the thickness of the coating film is uneven 3 Due to the influence of structural cracking, the drying cracking of concrete usually occurs within 1-6 months after concrete pouring, and the width of initial cracks is more than 0.03 mm After 1 year, there are often obvious oblique cracks at the corner of reinforced concrete slab or obvious transverse cracks in the center Once cracking occurs, it is often affected by temperature change, dry shrinkage and wet expansion, so that the cracks gradually expand In addition to uneven settlement of the foundation or earthquake and other factors, the degree of cracks is more obvious, and there are many engineering cracks whose width is more than 5mm Under the above circumstances, it is difficult to break the film with a thickness of 1-2 mm Even if it is not broken, the film will become thin and cannot be restored to its original state due to pulling, and become a thin surface which is physically unable to be lifted on the crack Its shape is like a very thin board Many of the bridge decks are damaged by external forces Once damaged, rainwater will be immersed into the whole crack, which is the source of building leakage 4 Affected by the quality of the construction base, the current roof waterproofing works usually start with a layer of cement mortar leveling layer Because the waterproof coating material adheres to the cement mortar, it will crack, swell (loosen) and lose its waterproof function with the cement mortar Compared with coiled materials, due to the thin film, it is more susceptible to the quality of cement mortar, which should be paid attention to Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,