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It is necessary to improve the quality of cement slurry on its own without having to purchase expensive additives? In fact, there is one ingredient that is added to the solution in the days of the Soviet Union. This "antiquated method." Suitable method for almost any construction tasks.
In Soviet times it was difficult to get the plasters and tile adhesives. That is why the people came their own way to improve the quality of cement mortar. This method was, to put it mildly, "unpretentious" and consisted of the addition of PVA glue. We used this mixture to create a floor screed, plaster, tiling, and many other types of work.
Today in the shops you can find a lot of ready-made mixtures with addition of glue. Here are just a price tag on such compositions is incredibly high. But the owner and the master there is a great chance, resorting to the use of "antiquated method," improving grout using PVA glue, to save money.
Only two adhesive injection process in solution can be identified. In the former case the adhesive was diluted with water. In the second - once introduced undiluted. The difference is that the first method, the compound PVAc and cement provides an additional margin of safety, and greatly increases adhesion. In the second case of the cement slurry out great adhesive substance.
We should also highlight the recipe for the preparation of the composition for filling floor screed. In this case you can safely use such a proportion: 100 kg of cement, 200 kg of sand, crushed stone 300 kg, 5 kg resistant pigment alkali and all this still 20 kg of glue. Also, water is added to obtain the desired consistency. This screed well fills all voids, and will be much less susceptible to the process of cracking.
Finally, PVA glue can be used in the preparation of the solution for plaster. The basis should take M400 cement, which is mixed with sand in proportions of 1 to 3. Water is added until the desired consistency. In 10 liters of solution must be added 60 grams of PVA glue.
Continuing the theme 5 practical solutions for those who really value their time and not only.
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A source: https://novate.ru/blogs/090918/47721/