Slaked and quicklime, what's the difference? Quicklime: pros and cons.

4377 02/13/2019 5 min.

The chemical substance - calcium oxide, better known to us as lime, has a very wide use in the construction industry. Its use is justified for obtaining various coatings and mortars, especially in the manufacture of so-called lime cement. Building lime production characteristics and scope - all this is our article.

Manufacturing

In spite of long history and the use of lime in the most various industries life activity of a person, in its pure form, quicklime is quite difficult to meet. The manufacture of this material involves a certain chemical process.

Lime can be obtained in two ways:

Thermal decomposition of limestone rock. A traditional and very costly method that requires special equipment. The main disadvantage is the release of a large amount of carbon dioxide.
Thermal treatment of oxygen-containing calcium salts- an alternative method, more and more common in recent years. Not consumed when firing. a large number of oxygen, so it is more environmentally friendly.

The physical properties of lime are also well studied. It is usually crystalline white color and characteristic "viscous" structure.

Usually you can find the following types of lime on sale:

When lime is quenched with water, irreversible processes occur, and the process itself requires maximum caution. Recommended use of funds personal protection Do not splash lime on exposed skin or mucous membranes. Extinguishing the composition can take quite a long time, sometimes up to a day. The addition of water must be controlled. Usually the volume of liquid should be determined by the tasks.

There are three types of lime mortar:

Hydrated lime, the so-called fluff. Used in construction, the consistency of the solution assumes approximately equal proportions.
lime dough- the second type of slaked lime. It is also used in construction or domestic purposes. The proportions are about 4:1, so the mixture is quite thick.
milk of lime represents the most liquid suspension, the content of dry lime is rather insignificant compared to the mass of water.

Depending on the ultimate goal and the use of slaked lime, a suitable solution is made. Cooking usually takes from 8 minutes for quick-cooked to several hours for slow-cooked. It is not recommended to use lime before the final slaking, as in this case there is no guarantee of obtaining a high-quality coating.

About how many bags of cement in one cube of concrete, and by analogy and lime, you can find out

Chemical processes in such a solution are suspended, but reappear when water enters. This promotes the growth of fungus and mold, which is why slaked lime is commonly used in construction.

You can find out how long the cement floor screed under the tile dries from this

Application in construction and everyday life

The use of quicklime is extremely wide. Dry matter is added to cement mortars for rapid hardening and imparting the necessary plasticity. Lime is used for whitewashing walls and ceilings. This method is still very relevant due to good decorative effect and the highest available price. A big advantage is the ease of application and the environmental friendliness of the solution.

for video application in construction:

Find out what the composition is cement mortar for plaster can be from this

Several options for using lime for domestic needs:

As already described earlier, special kind This substance - bleach is widely used for disinfection and disinfection of surfaces. This is especially true in crowded places, so bleach is traditionally used to wash latrines, plumbing equipment. For disinfection, bleach is used in hospitals, children's institutions and other similar premises. Due to the high toxicity of the substance, it is increasingly being replaced by analogues that do not have such a pronounced negative impact.

Lime is a versatile substance that, due to its extensive and varied properties, can be used in almost any field of activity. She happens various kinds, depending on the selection criteria, and is divided into several varieties. The options for preparing solutions with its content do not differ much from each other and do not cause difficulties, so this raw material can be used independently without the involvement of specialists.

Peculiarities

Quicklime- This is calcium oxide obtained by roasting calcium carbonate, it has a finely porous structure. Sometimes quicklime is called boiled lime.

Advantages over slaked lime

It has many advantages over the slaked variety:

high strength;
absorbs less moisture;
work with this material can be carried out in winter;
no waste;
very broad scope.

Quicklime is dangerous to human health, therefore it is advisable to carry out work in open space, using protective equipment.

A good advantage of quicklime can be considered a low cost in comparison with other mixtures. Lime material is resistant to temperature extremes, it does not crack, it has antimicrobial properties.

Specifications

Lime is a substance that is often found in nature (mainly in rocks), and the production of the product takes place in full compliance with established standards, because mixtures based on this must be high level perform protective functions.

Ready lime should consist only of carbonate rocks (limestone) with a small clay content. Various additives and impurities are allowed in the composition of the material based on GOSTs, depending on the application.

Limestone is very similar in appearance to chalk or coke, but they have different properties and are not interchangeable. To distinguish limestone from chalk, you can drop water on them. The chalk will not give any reaction, but the limestone will begin to foam and give off heat. If you use chalk to whitewash walls, it will leave marks on clothes and surfaces in contact with the wall. Lime does not leave any traces, so it is most often used for whitewashing walls.

Quicklime is divided into three grades (1, 2 and 3), and slaked lime is subdivided into 1st and 2nd grade. The exception is powdered quicklime, it is divided into two grades and has additives. Other types are made without impurities.

By external physical indicators, for example, by color, it is possible to determine the grade of the material. After heat treatment of limestone, quicklime is obtained, and if it has a white color, this means that the material does not contain additives and belongs to high grade. In other cases, the material has a grayish color, most often it is dolomitic and hydraulic lime.

The manufacture of lime material consists of the extraction of the rocks themselves, their crushing to required dimensions and subsequent firing in special furnaces. Currently, shaft and rotary tube furnaces are most commonly used because they provide a uniform temperature effect on the material and a continuous firing process.

The strength of raw materials is affected by the temperature during firing and manufacturing process. There are three strength options for the finished product: hard burnt, medium burnt and soft burnt lime.

Soft lime is very popular in construction, due to the following properties:

the extinguishing process is fast, about 3 minutes;
such material has a small size and low density.

Lime refers to low class danger, but during transportation and storage, safety precautions must be observed. Since quicklime reacts violently with water, it is necessary to make sure that moisture cannot get on the material.

The composition of lime most often includes various mineral additives that improve the properties of the material: granulated blast-furnace slag, quartz sand and other substances.

Kinds

There are two types of lime, which are distinguished by the amount of calcium silicate and aluminoferrite content in them: air and hydraulic. They perform various functions, for example, air speeds up the concrete hardening process, and hydraulic speeds up reactions in water.

It is important that all fragments of the substance are of the same size. This moment indicates that the raw material was completely calcined in the furnace. If pieces that are too large or too small are encountered, they may not be fully exposed to heat treatment, and from this the quality of the finished material will decrease.

According to the type of processing, several types of material are distinguished:

quick-cooked lump (boiler);
quicklime ground (powdered);
slaked hydrate - Ca (OH) 2;
lime dough;
lime milk.

lump lime

Lump lime is a mixture of lumps that differ in size. It consists of calcium oxide and magnesium, as well as materials such as calcium carbonate, aluminates, silicates. Magnesium or calcium ferrites, which are formed during the firing of raw materials, can be added.

The good strength of concrete is ensured by the fact that lump lime requires very little water (due to the fine grinding of the material) and generates practically no waste.

ground lime

Ground lime has the same composition as lump lime, but the difference lies in the fact that lumps of raw materials are ground much stronger and more thoroughly.

The main advantages of ground lime:

strength;
water resistance;
fast hardening.

To increase or decrease the rate of hardening, calcium chloride or sulfuric acid(gypsum material is also suitable).

Hydrated lime

Hydrated lime (also called fluff) is a slaked type of material with a highly dispersive composition. Quenching occurs by adding water to the lime raw material. To prepare such a solution, 70 to 100% water is added to the powder.

In order for the lime to completely go through the slaking process, it must be placed in a special pit for 2-3 weeks. So it will gain optimal strength and ductility. The minimum redemption period is 36 hours. In order to prevent the raw material from burning out, it is advisable to add water gradually until the moment when steam ceases to be released.

Lime dough is formed when sufficient water is added to form a plastic material. You can also find a solution such as milk of lime (mainly used for whitewashing tree trunks). Milk of lime is obtained by adding excess water to lime paste.

Formulation types

Depending on the scope of application, the following types of compositions are distinguished:

building lime- it is added for the preparation of concrete and cement mixtures in order to increase the strength of the composition;
hydraulic- also used for the production of concrete, but low grades. Ideal for structures that are located in areas with high humidity;
Komovaya- mainly used to prepare a solution for whitewashing;
Sadovaya- used in agriculture as a soil fertilizer, treatment of plants from insect pests, protection from decay and improvement of growth, it is highly undesirable to use it simultaneously with other types of additives and fertilizers;
soda- applied in chemical industry and in medicine;
Chloric- used as a disinfectant and for water purification.

Lime classification by slaking time

quick-extinguishing (up to 8 minutes);
medium extinguishing (up to 25 minutes);
slow-extinguishing (from 25 minutes).

Types of air lime

Depending on the percentage of presence in the composition of magnesium oxide, there are such types of air lime:

calcium;
magnesian;
dolomite.

Scope of application

Lime is used in many areas.

In agriculture, lime is used to control pests, reduce soil acidity, prevent the appearance of fungus, supplement animal nutrition, improve land cultivation, replenish calcium and phosphorus. It is best to treat heavy soil with quicklime. Lime is widely used as a material for whitewashing trees and processing plants.
Construction. It is used to accelerate the hardening of cement and impart plasticity to the composition, is involved in the production of thermal insulation materials and dry building mixtures, and serves as a link in building structures.
Ferrous metallurgy - enriches ferruginous and polymetallic ores.
Chemical industry - used in the paint and varnish, perfumery and pharmaceutical industries. It is used as a reagent and as a neutralizer of acid tars.
Pulp and paper industry.
Textile industry.

Chlorine lime is used for disinfection and washing of public places. because it has disinfectant properties. Quicklime is used even in Food Industry for mixing substances, and milk of lime is used to make sugar. Soda lime is used in medicine (artificial ventilation of the lungs or for anesthesia) and for respiratory systems (scuba gear, respirators and other devices).

Lime mortar coating wooden surfaces protects them from the processes of decay and the occurrence of fires.

How to use?

When preparing a lime mortar, it is important to ensure the safe interaction of raw materials with water for humans. It is advisable to carry out work in a well-ventilated area, and preferably in an open space. Since the substances used are chemicals, it is necessary to adhere to safety rules when working with such materials.

The powder substance can be used both in dry form and in liquid form. To prepare a liquid solution, the powder is poured into a container and filled with water. The solution must be mixed and diluted to the desired consistency.

For whitewashing trees, the raw material is diluted with water and applied to the tree trunk with a wide brush. But due to the liquid consistency of the solution, it will be necessary to process the barrel several times. In order to reduce the time of work, you can add clay, milk, PVA glue to the solution. These ingredients will make the mixture thick and viscous, it will evenly fall on the surface. Before processing the tree, all dead layers of bark must be removed, while not damaging the trunk.

To protect plants from fungus, you can use soda ash instead of lime, because soda dissolves faster and completely in water.

Do not work the soil too much big amount lime, as it will become alkaline, which will also not contribute good growth and development of plants. It is impossible to use manure and lime at the same time, because such a combination will prevent the formation of useful substances.

Before using bleach, check the reaction of the surface. To do this, you can process small plot, and if it remains intact after about 10 minutes, then you can use bleach for the entire surface. First, water is added to the raw material in a small amount and mixed until sour cream, and then more water is gradually added, also stirring, until a liquid solution is formed. In dry form, bleach is used only on wet surfaces.

Lime - Greek word which has its own meaning. Literally translated, it means "inextinguishable". This is one of those materials that have been around since time immemorial. It has long been used by humanity for its own purposes. Oddly enough, its properties were determined quite by accident. But they began to apply the material in many areas, through errors and trials, one might say, blindly. Lime - versatile material which is still in use today.

Due to its properties, the material is used in different industries, which differ from each other. In this article, we will look at how the material is mined, how slaked lime differs from quicklime, and in what areas it is used.

The history of the material

In ancient times, when people still did not understand anything about calcium and its compounds with oxygen and coal, they realized something. What exactly? By "scientific poke" it was found that limestone has excellent properties, especially as building material. In addition, if you burn some rocks, such as the same limestone, dolomite, chalk, etc., then you get a substance with binding properties.

If we recall the history of ancient China, then with limestone cement, workers stabilized the soil and made masonry of their famous Great Chinese wall. Its length is 2500 km. It is amazing that she has survived to this day, and today we can see her greatness. Over time, lime has become a key ingredient in the preparation of fertilizers used in agriculture.

There are two types of material: slaked and quicklime. How is one form or another obtained? What is the difference between them? Let's find out the answers to these questions.

Production of raw materials

We already know that lime is a product rock. It is mined by firing in special kilns from limestone, dolomite and chalk. The output is a material in the form of white lumps, or as it is also called, a lumpy "boiler". This is quicklime. The extraction process takes place in special factories, from where the lime is delivered further. "Kipelka" is the initial product from which other species will be produced further. Chemical formula material - CaO (calcium oxide).

The raw material ready after firing is not used for mortars and cement, as it has the ability to absorb moisture very strongly, and also contributes to the formation of fungal mold on the walls. Nevertheless, boiling water is quite in demand in the construction industry, namely for the manufacture of cinder concrete, sand-lime brick, colorants and mixtures for plaster.

Depending on the time during which it is possible to extinguish the lump "boiler", it is divided into 3 types. The first of these is quick-extinguishing lime. The time it takes to pay it off is up to 8 minutes. The second type is medium-extinguishing, which reaches in 25 minutes. Well, the last type is slow-extinguishing, which takes 25 minutes or more to reach the condition. This is how we smoothly moved on to another type of material - slaked lime.

Lime slaked

Differences between slaked and quicklime, what are they expressed in? The name itself already shows what the difference between the materials is. If a conventional raw material has the formula CaO, then slaked material obtained by adding water: CaO + H 2 O \u003d Ca (OH) 2. This is the extinction process. It is noteworthy that when raw materials are mixed with water, a violent reaction occurs, during which a huge amount of heat and smoke is released. The water literally boils. That is why lump lime is called "boiling". The output is a hydrate fluff.

From the lump "boiler" you can get different subspecies: ground quicklime, hydrated fluff, limestone dough or milk. Depending on the amount of water added for quenching, dough or milk is obtained. For example, to obtain limestone dough, the reaction liquid is required 3-4 times more than the material itself. And if you need to get limestone milk, then the amount of liquid increases by 8-10 times.

How to make slaked fluff

For the production of slaked lime, you need to follow some rules. Dehydration (quenching process) is required to be carried out on outdoors. The raw material itself must be placed in a tank or container. Since a fairly large amount of steam will be released during the process, you need to protect yourself. The material itself can also harm a person and even burn the skin. That is why it is necessary to protect the skin of the hands and the whole body, the eyes and the respiratory tract. You can not do without a suit or special clothing, gloves, goggles and a respirator. Then everything will be safe for your health.

It is important to remember that there is no need to rush in this matter. The quality of quicklime can vary, one is extinguished quickly, the other for a long time. If you do not bring the whole thing to an end, then it is possible that the material will smoke in the ready-made plaster. When you use slow-extinguishing lime, it is not recommended to immediately fill it with water. It is better to do it in small portions. Medium and quick-extinguishing are poured until the steam completely disappears to prevent burnout.

Note! Freshly slaked lime may have residues of the original material. They are extinguished again, and then removed.

After dehydration, the amount of lime will be greater. From 1 kg of quicklime material, you can get 2 or more. Lime slaked and quicklime difference is obvious. But where are these materials used?

Application in construction

The main area in which slaked and quicklime is used is construction. Lime is an excellent binder. One of its advantages is ecological purity and naturalness. It is completely harmless to humans. We have already talked a little about the use of quicklime raw materials, but these are not all aspects. It is necessary for the manufacture of dry building mix, mortar and plaster composition. In addition, by adding lime to concrete products, they become much stronger, more moisture resistant and denser.

Lime, or calcium oxide, is a chemical obtained from the processing of limestone. It has found its application in construction, and many other areas. This is due to its property of bonding fine sand particles, disinfection, high speed absorption of moisture and the rapid flow of a chemical reaction with water, as a result of which heat is released.

How lime is made

The process of obtaining lime begins with the collection of limestone. This rock is mined open way in quarries by means of explosions. Limestone is delivered to the production, where it is fired. First, the blocks of stone are broken down by a crusher into smaller pieces. The ground rock is calibrated by size, since the firing requires the use of raw materials of the same section. When the rock is heated to a temperature of +800 degrees, an active release of carbon dioxide begins from it. Thermal decomposition of limestone ends at a temperature of +1200 degrees. As a result, quicklime, also known as calcium oxide, is formed.

Initially finished material is a pile of white, which is already usable, but still does not have sufficient amenities for use. In this regard, it is ground into powder. It is he who is the finished product of production.

Types of lime

Initially, during the processing of limestone, the production of quicklime is carried out. In this form, it has increased alkaline properties, which makes it difficult to use in many areas. In this regard, it is processed into other aggregate types:

Hasted.
Chloric.
sodium.

slaked

First of all, calcium oxide is processed to obtain slaked lime. To do this, quicklime raw materials are poured with ordinary water. As a result, an active chemical reaction begins, from which a strong release of heat is carried out. After its completion, 2 products can be obtained - milk of lime or dough. Milk is a liquid in which a large volume of water is present. It got its name from its white color. As for lime dough, it is obtained if less water has been added, so its concentration is not enough to achieve a liquid state.

When selling slaked lime, the state of aggregation of the dough is usually used, which is also referred to as lime paste. The material is sold in sealed sealed plastic bags weighing 2 kg or more.

Chloric

This type of lime is obtained as a result of a mixture of hydrochloride or chloride with calcium hydroxide, the so-called slaked lime. This substance is a powerful bleaching agent, invented back in 1799. Its alternative names are whitewash or simply bleach. This is an active substance belonging to the second hazard class. As a result, extreme care is required when using it.

sodium

This type of lime is obtained by mixing calcium hydroxide and sodium. This is usually done in a laboratory. For production, it is also possible to use calcium oxide in the amount of 2 parts to 1 part of pure caustic sodium with the addition of water. The mass is mixed, after which the water is evaporated in an iron container. The resulting stone is broken and sifted through a sieve. This substance is stored only in well-closed containers with minimal air contact. This is due to the property of absorption of carbon dioxide by soda lime. The quality of this material is evaluated by heating after mixing with sugar. As a result of heat treatment, the mixture should not emit the smell of ammonia. In its presence, this indicates the presence of nitrate salts, which are an undesirable impurity.

Areas of use of lime

The direction of application of each type of lime is different, due to different chemical properties each of them. First of all, they have a difference in alkaline reaction.

The use of quicklime

Calcium oxide is commercially available as a white crystalline powder. It is poorly soluble in water, leaving a residue. This substance is included in the basis of silicate bricks and mortars for brickwork. Often this material is used to produce slaked lime, the scope of which is wider. For this, the finished product is mixed with water. The resulting solution is immediately ready for use. Most often, calcium oxide is used to produce lime cement, but with the advent of more modern materials the need for it has diminished.

The substance found its response in laboratory practice. It is used as a cheap agent capable of quickly absorbing excess liquid solutions. Quicklime is used to make chemical packages for heating canned food in soldier's and tourist dry rations. Calcium oxide is placed in plastic bag next to the canned food to be reheated. Water is added to the bag, after which a violent chemical reaction takes place with the release of heat. As a result, lunch is warmed up.

Calcium oxide is also used in the food industry. It is better known to consumers as additive E529. Of course, it is not added to products for direct consumption, but it is used in chemical reactions, for example, at the stage of processing beets into granulated sugar.

The use of slaked lime

Calcium hydroxide is more common. It can be purchased as a wet dough placed in airtight bags. The main purpose of this material is to whitewash the premises. It is with these substances that the borders and tree trunks are painted white. By mixing a part of calcium hydroxide with water and four parts of sand, a mortar is obtained for laying bricks and stone. Now this material has already been practically abandoned, since it is inferior in strength to good cement. In addition, the solidified solution constantly absorbs and releases moisture. This leads to its destruction at negative temperatures.

Slaked lime, as well as quicklime, can be used in the production of silicate bricks. It is also used in tanning leather to increase its softness. Calcium hydroxide is also used in the food industry, where it is better known as additive E526.

When carrying out whitewashing, it is necessary to mix slaked lime with water to obtain milk. The suspension can be applied or with the help of. If you let it settle, then the lime suspension present will settle to the bottom. As a result, the substance is stratified into clear water top and sediment. The liquid purified in this way is called lime water. This solution is an indicator of carbon dioxide. Water becomes cloudy, turning whitish upon contact with it.

The use of slaked lime is also typical for dentistry. In particular, it is used to disinfect the root canals of the teeth. Many chemicals are made from calcium hydroxide, such as Bordeaux mixture and other fungicides.

Appointment of chloride of lime

Chlorine is used as a bleach and disinfectant. With its help, fabrics are washed in order to give them a white color. When water is added, the resulting solution is used to treat areas with a high concentration of bacteria. Almost all chemical substances for cleaning toilets contains bleach.

Chlorine is also added to tap water. This process is more commonly known as chlorination. It is used to disinfect communication pipes. Most often, this method is used in the hot season during a surge in the development of bacteria. Water saturated with lime has a characteristic smell of bleach. Despite this, this method of disinfection is used most often, since it is one of the cheapest and most effective. When such water is exposed to the open air, active chlorine particles are neutralized as a result of contact with it. After that, the water returns to normal properties.

Application of soda lime

The scope of lime in this form is the most modest. This substance has a high absorption of carbon dioxide, due to which it is used as a trap in closed systems. It is found in gas masks and diving equipment. Such lime, only in the amount of 5 kg, is able to absorb all the carbon dioxide that a person releases as a result of breathing per day. Previously, it was used in spaceships, but this technology has become a thing of the past.

Features of working with lime

All varieties of lime are dangerous substances with strong alkaline properties. In this regard, when working with them, it is required to take care of the availability of personal protective equipment. It is important to prevent contact of the substance with exposed skin areas. Rubber gloves must be worn on hands. When using hydrated and quicklime, it is ideal to use personal respiratory protection.

The vast majority of materials containing lime are best avoided. One of the few exceptions is silicate brick, which, as a result of the treatment with firing, loses the alkaline properties of its component.

When using milk of lime for the purpose of whitewashing, it must be taken into account that when it is applied to the surface, it becomes slightly grayish. Whiteness appears gradually only when it dries.

Lime-based plasters cannot be used in wet areas such as bathrooms, basements, and so on. They have a fairly high porosity, so they are not suitable for delicate finishes, such as painting or wallpapering.

Lime can rightly be included in the list of the most commonly used materials by man. At the same time, we use it not only in finishing work, but also in a number of tasks where the properties of lime are ideally suited.

called given material calcium hydroxide. It is obtained from calcium oxide (quicklime) by reacting the latter with water. A so-called quenching reaction takes place, which can take less than 8 minutes and more than 25 minutes. Depending on this, quicklime, which is usually lumps of a gray hue, is divided into fast-, medium- and slow-extinguishing lime.

The quenching process is chemical in nature, and during it a large amount of heat is released. Water evaporates, and we can observe this steam during the process. When slaking lime, a fluff or dough is obtained. The latter has unique properties, allowing it to be stored for a long time in the ground. It is noteworthy that in this case specifications material only increase, as the remaining particles are quenched during storage.

Areas of application of slaked lime

Whitewashing of premises and other surfaces, including tree trunks, thus protected from pests;
Use in brickwork. Most often - in the laying of the stove. In this case, we can talk about the highest adhesion to a brick or cinder block surface;
Used as a finish on wood. However, in this case, it is necessary to use a plaster mesh or shingles.
Preparation of lime mortar, which has been used since ancient times. To prepare the solution, three to four parts of sand and one part of slaked lime are used. Water is released during the process, which is a disadvantage, therefore, in rooms created using this solution, always high humidity. So the cement has almost completely displaced this solution over time;
Preparation of silicate concrete. This concrete differs from simple concrete in accelerated setting time;
Production of bleach;
leather tanning;
Neutralization acidic soils and fertilizer production. At the same time, lime is applied to the soil after flares in the spring and autumn period of the year;
Lime milk and lime water. The first is used to prepare mixtures to combat plant diseases. And the second is for detecting carbon dioxide;
Dentistry. With the help of slaked lime, the canals of the teeth are disinfected;
Food additive E526.
In fact, there are a lot of ways to use lime. We have listed only some of them.

How to store slaked lime

In case if we are talking about winter period, then lime is stored in the ground at least at a depth of 70 cm. In this case, the dough will be protected from freezing.

Depending on the purpose, the dough is aged for a certain time. In the case of use in plaster solutions, we are talking about keeping for at least a month. If the solution will participate in the masonry, then two weeks is enough.

If you are preparing a solution based on lime, then in this case ideal solution will be the gradual addition of pre-sifted sand to the dough. Gradually kneading is carried out to form a homogeneous mass. Can be filtered later ready solution through a sieve, removing everything that prevents it from being homogeneous;
By adding to mortar plaster, you will significantly increase its setting time. In this case, the setting time is estimated to be approximately 4 minutes. In the case of the addition of cement, hardening occurs over a longer period of time. A pure solution of lime seizes for a very long time.

3 ways to slake lime

Method 1: Lime clods are laid in layers 25 centimeters thick. After that, they are watered with water and covered with wet sand from above. The slaking process takes about two days, after which the lime can be used;
Method 2: In the case of lime of medium or slow slaking. A hole is dug, at the bottom of which a solution container is installed in the form wooden box with a flap at the bottom created using a fine mesh. Lumps are placed in a box and filled with water. Water is added as the fragments break up into smaller ones. As soon as all the fragments are extinguished, and the final product is ready-made milk of lime, we drain the excess water by moving the damper. After that, lime porridge is covered with a layer of sand of 10 centimeters, which will protect it from drying out;
Method 3: Pushenka can be prepared by pouring lime with water in equal proportions. During the quenching process, the mixture is stirred. However, one must be careful not to bend over during periods of the highest heat generation, so as not to breathe in vapors.

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