Efflorescence can destroy masonry. How to avoid them

It is the work in the offseason is becoming common cause of white stains (efflorescence) on the facade of the house. At the end of the season we are trying to finish the work by any means. Add plasticizers and additives in antifreeze mortar. But not only do they lead to the formation of efflorescence.

Where are the efflorescence

Efflorescence these white spots called because of the fact that they are on the tread surface of the salt. Where does the salt in the masonry? Sometimes because of the bricks, but it will talk about below. However, most often it is found in antifreeze additive for masonry mortar.

salted water temperature is below freezing. Therefore, the main component of antifreeze additives are often exactly salt.

If masonry is not completed before the frost, can not do without antifreeze additives. But if the temperature is still above zero in the autumn, it is possible to reduce the time set the strength of the solution by the use of plasticizers. To prevent white bloom, choose salt-free formulations.

The more dangerous efflorescence

Unfortunately, emerges on masonry salt not only spoils the appearance. If the brick and the solution has a large number of salts, expanding, they create stresses in the surface layer of the masonry. Microcracks appear, the front part may swell, peel or flake off. Therefore, it is important not to go too far with additives in solution.

From what else may appear efflorescence

White patches often found on the masonry, which is being built on a solution without any additives. What is the reason?

salts of compounds contained in the clay from which the brick is made. If a lot of them, appear the efflorescence. The results of chemical analysis of bricks when buying us, of course, no one will give. But the way to avoid the appearance of a white plaque on laying there.

It is noted that salt active emerges with a moisture excess. To deal with this factor in several ways:

• observe the water-cement ratio at the kneading solution (not pour out excess water);
• use salt-free plasticizers;
• work in dry weather;
• use a brick with low water absorption (5-6%).

If you follow these simple rules, you do not have to buy washing and the spring to wash the walls of efflorescence.

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