Builders are sometimes used in the preparation of addition salts grout. It is the most cheap antifreeze additive. This is done in order to be able to continue the construction work at a negative air temperature and add a solution of additional features. On the cement setting will take about two days. The cold water as it may simply freeze and disrupt all the construction work. Expansion of the water does not allow the cement to fully connect with the filler, it becomes loose.
Manufacturers of building mixtures for winter purpose product sometimes with white cement added salt. Most cases used in production of tile adhesive, a universal solution and masonry mortar. More responsible manufacturers instead of salt use special polymeric additives. This increases the cost of the mixture, but dramatically improves its quality.
Expert Opinions on the feasibility of adding a salt solution differ greatly. Consider the pros and cons of using salt in the preparation of the cement slurry.
Disadvantages with salt solution:
Fittings - it rusts much faster;
- Increases concrete corrosion;
The advantages of using the salt in mortar:
- allows the use of mortar at low air temperatures;
- low price, compared with other antimoroznymi compositions.
Methods of Use of salt in the cement slurry with
1. While waiting for the temperature between 0 - 5 degrees during construction, it added 2% salt based on total weight of the mixture.
2. When the air temperature may drop from - 6 to - 15, the amount of salt is in solution 4% by weight of the total mixture. Accordingly, it can be concluded that the use of salt in the cement slurry with the cold permissible in the case where there is no reinforcing belt made of steel elements in the structure. When filling unreinforced structures it may well be an alternative to more expensive antimoroznymi additives.
According to expert opinion builders, pour the solution at negative temperature is not necessary at all. Better plan time work initially so that there was no need to pour the solution in the cold. Term operation of facilities that were built in the winter will be lower. The truth is the exact figures of this period, the difference no one gives.
