wonder how salt get into the masonry?
They may be contained in the brick and masonry mortar.Other additives in building materials, such as antifreeze, or hardening accelerators, promote the formation of salt.Also, salt can penetrate with precipitation or rising from the soil with capillary moisture (if there is no waterproofing the walls), or under the influence of ground water (in case of failure of drainage system).Efflorescence
formed mainly in porous materials where the salt solutions can freely move, particularly in brick.The ice-salt solution in dry weather to seek the surface moisture evaporates, respectively, and the salt left a white film.
It consists of two stages: the removal of spots and prevent their occu
If you decide to do your own cleaning, it would be better to experiment: in the small areas of applied compounds and evaluate the results.When using smyvok requires caution, as they contain harmful substances.You must use protective clothing, gloves, goggles.Technology application smyvok not complicated: the treated surface with a brush or spray, 10-30 minutes, all washed off with water.Some salt deposits manage to wash off with water without pre-treatment chemical composition.
On the walls of old buildings efflorescence cleaned mechanically - brush or wooden spatula.Metal objects are not used as they leave dark marks on the masonry.Also handle 2-4% solution of hydrochloric acid (surface should be pre-moistened).After 5-10 minutes, the treated area thoroughly watered power shower.
after surface treatment, we should not think that everything will be okay.It happens that some time later reappear efflorescence.This requires prevention through treatment of water-repellent - water repellent.This should be done immediately after drying walls, peeled wash.Most repellents - silicone.Since silicone film protects the surface from penetration of water molecules and prevents air exchange.The service life of the treated surface such means reaches 5 years, depending on the material and the climate.
So how do you avoid the appearance of efflorescence?
before the original masonry structure of brick, use a thick cement solution with a low content of soluble salts.Laying produce in dry weather, and do not besmirch the front of the brick masonry mortar.It is necessary to close the clutch at the end of its work and to cover the protective compounds.