Prevent rainwater, groundwater, industrial and civil water supply and drainage, corrosive liquids, moisture and steam in the air from intruding into building materials. The parts of buildings that require waterproofing treatment are mainly roofs, walls, floors and basements. There are many kinds of waterproof materials, which are divided into 4 categories according to their main raw materials:
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①Asphalt waterproof material. Asphalt linoleum, paper asphalt linoleum, solvent-based and water-emulsion asphalt or asphalt rubber coatings and ointments made from natural asphalt, petroleum asphalt and coal asphalt as the main raw materials have good adhesion, plasticity, Water resistance, corrosion resistance and durability.
②Rubber plastic waterproof materials. Using raw materials such as chloroprene rubber, butyl rubber, EPDM rubber, polyvinyl chloride, polyisobutylene and polyurethane, elastic tireless waterproof membranes, waterproof films, waterproof coatings, coating materials, ointments, and clay can be made , waterstops and other sealing materials have the characteristics of high tensile strength, large elasticity and elongation, good adhesion, water resistance and weather resistance. They can be used cold and have a long service life.
③Cement-based waterproof materials. Admixtures that promote the setting and compaction of cement, such as waterproofing agents, air-entraining agents and expansion agents, can enhance the hydrophobicity and impermeability of cement mortar and concrete; accelerating setting agents based on cement and sodium silicate Mortar can be used to plug leaks and waterproof underground projects.
④Metal waterproof materials. Thin steel plates, galvanized steel plates, profiled steel plates, coated steel plates, etc. can be directly used as roof panels for waterproofing. Thin steel plates are used as metal waterproofing layers in basements or underground structures. Thin copper plates, thin aluminum plates, and stainless steel plates can be made into waterstops for building deformation joints. The joints of the metal waterproof layers should be welded and painted with anti-rust protective paint.
