Selection of building sealant and its influencing factors
Building sealing glue is mainly used for sealing various joints or holes in buildings to prevent the penetration of gases, liquids and solids, and to prevent structural materials from being damaged when the structure is displaced, thus maintaining insulation, sound insulation, waterproof and dustproof. Anti-gas, fire, corrosion, shock absorption and the function of preventing seams from accumulating foreign matter. First, the classification of building sealing glue (1) According to its composition, there are various kinds of polysulfide rubber, neoprene rubber, acrylic acid, polyurethane, butyl rubber, silicone rubber, rubber-plastic composite type, thermoplastic elastomer, etc.; (2) According to the construction form, it is divided into hot coating type, cold coating type, curing reaction type and solvent evaporation type. (3), can be divided into doors and windows, caulking, waterproof and shockproof, prefabricated wall and so on according to the purpose. Second, the basis for the selection of building sealing glue (1) Good low permeability; (2) Good embedded construction performance; (3) Compatible with the joint substrate, no pollution, and stable bonding; (4) Cohesive failure does not occur during stress deformation; (5), does not produce excessive permanent deformation, softening or stickiness at the use temperature, no hardening and excessive embrittlement; (6) It is resistant to aging, weather and reasonable service life under the conditions of use; (7) The displacement capacity meets the requirements; (8), structural bond displacement capacity (%) and modulus strength are reasonably unified. Third, the factors affecting the construction of sealing glue (1) Radiation aging of UV in sunlight; (2) Oxidation of oxygen and ozone; (3) aging of water and water vapor; (4) The influence of temperature changes in the environment; (5), the role of wind load and shear force; (6), cyclic mechanical (compression / tensile) load; (7) Invasive air pollution, such as acid rain, salt spray, etc.; (8) Effects of microorganisms and large organisms, such as fungi. Bridge Faucets,bridge kitchen faucet,Bridge Faucets price Yuyao Zelin Sanitary Ware Co., Ltd , https://www.kitchen-sinkfaucets.com