Now a heat-resistant mortar for plaster can be made independently, and the most important thing is that this can be done even without the use of cement. Not so long ago, a new recipe was found by scientists and engineers from the American Rice University. The consistency they created is a real breakthrough.
According to the scientists themselves from Rice University, they did not discover anything fundamentally new. It would be more correct to say that the engineers "rediscovered" the recipe for a heat-resistant mortar for covering plaster that has long existed in the history of mankind. Researchers are convinced that this is the mixture used by our distant ancestors in many parts of the world. The recipe remains relevant today.
The thing is that wood or coal ash in most cases is a very effective alternative to traditional cement in mortar. With proper mixing, the ash can provide not only high resistance to high temperatures, but also increase the strength of the structure. At the same time, the mixture is absolutely environmentally friendly and keeps on the wall for many years.
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How to prepare a miracle solution? The recipe is based on the use of calcium oxide. For cooking, you will need to take 800 grams of table salt, 4-5 liters of slaked lime, 6 liters of coal or wood ash. First of all, lime is diluted in 2.3 liters of water. Liquid is being filtered. Ash is sifted from large debris, mixed with salt and only then added to lime. All ingredients are slowly mixed until the solution reaches a homogeneous structure.
In continuation of the topic, read about 3 ways to get rid of the gap between the wall and a bathroom, so as not to breed dampness and not flood the neighbors.
Source: https://novate.ru/blogs/230322/62491/