Range of works to protect the building from moisture or from the harmful effects of filtering or washing water or other corrosive liquid called waterproofing. Waterproofing contributes to normal buildings, facilities and equipment, increases their durability and reliability. This complex includes the following activities: sealing joints and interfaces, training grounds, the device waterproof cover and a protective sheath. By type of primary waterproofing material waterproofing distinguish polymer, bitumen-polymer, asphalt, rock, plastic and metal. By way of devices, waterproofing is painting, plastering, , evaporated, cast, impregnating, laminated, and mounted injection.
Waterproofing penetrating developed back in the 40's of last century. She based on the effect of capillary conductivity of concrete. Penetrating (penetrating) the materials are made of cement with additions of crushed sand and chemically active substances. Supplements together with capillary moisture penetrate into the concrete base and form in the pores of threadlike crystals, reacting with the chemical components of concrete. The pores become narrow, difficult access to water, thickness of the layer is 1-5 mm. Used such compounds mainly in the fresh concrete when the pores of the most open in the repair of old foundations have deep cleaned the surface with a water jet or sand blasters. Injection waterproofing by forcing a binding material into the seams and cracks in building structures or the adjacent soil by methods similar to the device impervious curtains.
This kind of waterproofing is used, as Typically, when repairs. To use it all the more widely used new polymers (urea, furan resin). Mounted waterproofing is made from specially manufactured items (profile tape, metal and plastic sheets) are attached to the basic construction of assembly constraints. It is used in particularly complex cases. Improvement of it goes towards the use of fiberglass, rigid pvc, industrial manufacturing precast concrete products coated with factory-plastering or painting waterproofing. Evaporated waterproofing done in the form of a thin (less than 2 mm) multilayer coating, usually from the bitumen and polymer coatings and paints, for protivokapillyarnoy and corrosion protection of steel and concrete structures. The most reliable hot bitumen-polymer and cold epoxy-rubber coverage. Increasing use of new polymeric materials get cold hardening. When choosing the type of waterproofing prefer such a coating which, at equal reliability and cost, allow a whole mechanize the waterproofing work to eliminate their season.