Extinguishing lime

Lasering with air access

Depending on the state of lime impurities, use the appropriate lasing (quenching) method.
Lasering to powdered state: A piece of lime is immersed in water. When it is removed from the water, it disintegrates into a powder.This powder, mixed with water, gives a lime cake with less binding force than lasing with excess water.
Lasing with excess water:
1. pure lime is poured into water in the ratio of 1 part lime to 3 parts water and mixed immediately so that the water reaches every particle of lime. During lasering, the lime gives off as much heat as it took in the firing. In places where the water does not reach, lumps form and the lime burns. It then has less binding force and is unsuitable for painting purposes.Lime lumps in the plaster on the wall - after contact with water from the air - lasso and splinter. Clean lime should lick off after 10 minutes. The purer the lime, the sooner it lashes. To the extent that the above proportion of water is added to impure lime, it will lase slowly, unable to heat such an amount of water, and will form the so-called "sunken lime" with low binding force.
2.Contaminated lime (in 10 ÷ 30%) needs water for lasing in the ratio of 1 : 1. First, less water is taken and added as necessary.
And to make sure that all the lime particles are well lased, the lime dough should be kept for a certain period of time, such as one year.
Two types of lime contamination:

1. Marls and clay.
2. Alkali, sodium and potassium salts, which is very dangerous, because under the action of moisture the salts dissolve. Saltpetre is produced and the plaster peels finely.

In order to clean the lime from the above salts, it should be washed 5 - 6 times with water after slicking (when it thickens).
Water penetrating through the crevices of the box soaks into the ground along with the salts dissolved in it.
When removing the dug lime from the box, it is necessary to leave a 30-centimeter layer of lime at the bottom, as this layer contains the most impurities.
The lime cake needs to be examined for grains and the size of the swollen particle.
The larger the particle, the more prominent and better the lime.
Calcium hydroxide can be dissolved in water - for 1 g of lime 1 ÷ 1.5 liters of water. Then the so-called "lime water" is obtained, quite clear, becoming cloudy when heated.
In the fresco technique it is used as a binder.
After coming into contact with CO2 from the air, lime water turns into crystalline calcium carbonate.
Crystalline CaCO3 is the canary white marble from which the best grades of quicklime are obtained.
Lime dough is used for mortar. Lime water - as a mineral binder.
Neither gypsum nor cement can be used as a binder or for mortar.
Cement contains a lot of alkaline salts and any addition can cause salt efflorescence on the surface in as little as two years.

Airless forestry

A hole is dug in the ground to a depth of 1.5 meters.
The sides of the pit are planked with boards.
The bottom is lined with river sand to a thickness of 20 ÷ 30 cm. On this is placed a half-meter layer of quicklime and covered again with the same layer of sand.
The whole is poured with three times the amount of water.
As soon as the water enters the lime, lasification occurs. The lime increases in volume and a lot of water vapor is produced, which seeks an outlet through the sand.
However, this should not be allowed to happen. It is necessary to add water, add sand and supervise for 12 hours.
After sizing, every day, add two-three times the amount of water (for 2 - 3 days) to flush out alkaline salts.
Such lime after three months can be used for frescoing. It has a very swollen particle, no grains. Its lime water gives a thick crystalline coating.