Professional rotary sand screening machines - high-performance, reliable, wet sand screening, capacity up to 15 cubic meters. sand per hour.

Professional sand screening machines SP72 and SP120

1. Seeders of the SP series are intended for enterprises producing concrete, which require the addition of sand of a certain fraction. As practice shows, with volumes of sand consumed over 20 tons per day, vibrating screens become unacceptable for sand screening tasks, since they cannot provide the required performance. This problem is solved by replacing the vibrating screen with a sand screening unit of the SP series. These installations are produced in two types, with a productivity of 7 and 15 cubic meters.

How to remove sand from the kidneys with folk remedies.

sand per hour.

2. Competitive advantages:

• very low operating noise due to the absence of vibrations
• much higher productivity when screening wet and wet sand
• convenient collection of sifting waste
• ease of integration into automated lines
• VERY high reliability and durability of the seeder due to the absence of vibration and reliable design (see photo below)
• practically maintenance-free
• The seeders use high-quality Pskov gearboxes produced at an enterprise that has existed since Soviet times - the Pskov Mechanical Drive Plant. Italian gearboxes, usually made in China, are much inferior and often fail.

All of the above advantages have already been convinced at many enterprises producing concrete, aerated concrete, foam concrete. One of them is SZNK, the largest producer of ready-mixed concrete in St. Petersburg!

3. Performance

• unit SP72 - 7 cubic meters sand per hour
• unit SP120 - 15 cubic meters sand per hour

The sifted sand comes out of the throat and can be directed both into the hopper and onto the conveyor belt. Loading of sand for sieving can be done either manually or by means of automatic feeding.

For small industries with low productivity, a VS-3 vibrating sieve is used.

4. Main characteristics:

Seeder price is indicated in the price list

Photo

Photo 1. 3d model. At the Stroy-Beton plant, all equipment is designed in three-dimensional design programs. Therefore, changes in accordance with the requirements of customers for a specific task are carried out as quickly and efficiently as possible.

Photo 2. Sand screening plant SP series

Photo 3. Loading throat

Photo 4. The drive system of the sand seeder of the SP series. Belt drive to the gearbox - insurance against jamming. The coupling is finger-type, not bolted - increases durability by at least 5 times.

Seeder video

Additional Information

1. Description of automated sand storage
2. Description of the shaker
3. Description of vibrating screens

Certificate

Screening - sand

Page 2

In fig. 75 shows a diagram of an installation with heating, without sand sifting.

The roughness was obtained by gluing grains of a certain size, obtained by sifting the sand through special sieves. Thereby, a uniformly distributed grain roughness was achieved.

Rotary sand screening machines, SP series

The roughness was obtained by gluing grains of a certain size, obtained by sifting the sand through special sieves.

Dust and clay particles from the sand must be removed in advance by sifting the sand on special sieves. Used sand, as it gets dirty, should be completely replaced or refreshed by adding fresh sand in an amount of 5 to 15%, depending on the air pressure, which is usually maintained in the range from 3 5 to 5 atm.

When making a solution directly on the site, it is necessary to mechanize the processes of slaking lime and sifting sand.

The process begins with the preparation in the compound shops of the charge, drying, grinding, sieving sand, dolomite, chalk, soda, sodium sulfate, pegmatite and other components. The charge is loaded into the furnace for melting, the resulting mass of glass is pulled out, rolled, the finished product is polished, sorted and packed.

On a non-automated sand drying plant (drum or other type), it is necessary to mechanize the processes of loading, drying and sifting sand. Sand should be sieved in an isolated chamber with dust extraction. Hopper or funnel for receiving raw sand equipped with protective grilles, which must not be removed during operation of the disc feeder.

When preparing the solution at the construction site, operations are added for mechanized lime slaking (Table 321), and sand sifting.

Grain, or granulometric, composition of sand is characterized by the content of grains of various sizes in it and is determined by sifting the average sample through sieves. A set of standard sieves for sifting sand includes sieves with 10 holes; 5; 1 25; 0 63; 0 315 and 0 14 mm.

The roughness was obtained by gluing grains of a certain size, obtained by sifting the sand through special sieves. By the same token, a uniformly distributed grain roughness was obtained.

Preparation of fresh sand consists in sifting it through a sieve. In foundries with occasional production of small amounts of castings molded into the ground (for example, in small foundries for non-ferrous casting), stationary flat wicker sieves with mesh sizes of 5 - 6 mm are used to screen sand. Sifting is carried out by manually throwing sand onto a sieve that is installed obliquely to the horizon. Fixed sieves are of low productivity, and therefore, with regular consumption of sand, even in not large quantities mechanized sieves are used.

Obtaining polished and reinforced building glass, glass blocks, glass profiles, as well as facing tiles has fundamentally the same technology, consisting of the following stages: 1) preparation of the charge by drying, grinding, sifting sand, dolomite, chalk, soda, sodium sulfate, parchment and other components; 2) cooking the batch in furnaces; 3) stretching, rolling the resulting mass of glass to obtain a particular product; 4) polishing, sorting and packaging of finished products.

For masonry mortar need sand with granules 5 mm, for plaster mortar(soil) - no larger than 2 5 mm. Fine sand (grains no larger than 1 25 mm) is needed for the top layer of plaster, especially for plastering internal surfaces and the ceiling. Therefore, it is necessary to have sieves with cells no larger than the indicated sizes for sifting sand.

In the 19th century, during the period of active creation and implementation metal structures required cleaning of the metal from rust before coating. A pneumatic device - sandblasting - which throws an abrasive material out of a nozzle at a high speed (300-800 km / h and more) has proven itself well in this sense.

In the middle of the 20th century, they began to actively invent and use new abrasives. There are many items on the market today Supplies to the sandblaster. This article is intended to help the buyer navigate this variety, to figure out which sand for sandblasting should be chosen in a given situation.

For quite a long time, simple quartz sand was taken as a consumable for sandblasting. From him came the name of the unit. Today, in the bulk of developed countries, sand is not used for sandblasting, it is prohibited for safety reasons. Since the sand for sandblasting, when it hits the surface, breaks into fine dust, capable of being carried far and extremely dangerous to human lungs. In any case, the worker must wear a respirator and special goggles. In addition, the sand is much softer. modern materials, which causes high consumption per unit area. Nevertheless, ordinary sand for sandblasting works is actively used in Russia and neighboring countries due to its exceptional cheapness and some positive factors... We list them below:

• The low abrasive strength guarantees a minimum of damage to the cleaned base, even with the wrong grain size. Suitable for non-ferrous metals.
• Waste sand from cleaning and sandblasting devices can be sold as building material or reused.
• Any nozzle can be used, including the most expensive tungsten carbide or boron nozzles, and they will last an order of magnitude longer.
• Any sand is suitable for work - sea, river, quarry, desert. The main thing is to sift and dry it well. This significantly reduces cash costs.
• With all this, sand includes the widest range of fractions for any effect.

Sand is suitable for sandblasting:

• Ordinary river sand for sandblasting. It is necessary to sift.
• Career. Smaller than river, you need to wash and sift.
• Industrial quartz sand for sandblasting. Significantly more expensive, it is made by sieving and separating into fractions of simple sand.
• Special abrasive crushed sand for sandblasting is obtained as a result of crushing quartz rocks, has an acute-angled grain shape, therefore it is effective in terms of operating speed and abrasive consumption.
• Nickel, copper slag. Made from copper and nickel production slag. Stronger and harder than sand (especially nickel).
• Pomegranate sand. Much harder than simple. Suitable for cutting metal with hydraulic sandblasting.
• Fractions of steel and cast iron. Dozens of times stronger, but more expensive. The base is hardened, like forging. Crushed shots are designed for faster and coarser processing.
• Electrocorundum. Crystalline aluminum oxide. The hardest of all, therefore, practically not damaged when processing any material.

First of all, it is required to take into account the nature of the planned work. What are you going to do: clean an old rusty cistern or paint an elegant pattern on the glass?

Also, consider the following:

• What is the strength and thickness of the pollution. Perhaps an abrasive that is too fine or not hard enough will not cope here.
• The stronger the surface to be treated, the harder the consumable is needed. The softer the base itself, the higher the likelihood of damage from too hard sand. For example, steel or cast iron beads are needed to machine steel parts of a car. Garnet sand and electrocorundum are used when working with alloy steel, titanium, and so on, when the hardness of quartz and slag is already low. To apply beautiful patterns on the mirror and glass, as well as to frost the glass, you will need the purest fine, homogeneous sand. For work with tempered glass - aluminum oxide 0.1-0.8 mm.
• What state is required to bring the surface? The larger the fraction, the rougher work... For example, to polish a copper or aluminum base to a shine, use a small consumable - up to 0.3 mm. If you need to peel off without damaging the surface, a resistant paintwork needs a fraction of 0.3-0.6 mm. To remove rust, you need sand or slag of medium size - 0.6-1.6 mm.
• Work execution time. Particles with sharp edges and high hardness (crushed sand, crushed shot, electrocorundum) will level or clean the surface much faster, but coarser than round sand of a similar fraction. A coarse abrasive for sandblasting is used to remove welding scale or to remove a thick bitumen coating.
• The ability to collect the remaining mining. In its absence, it is economically correct to load cooper, nickel slag and quartz sand into the gun.

Sandblasting of metal with quartz sand is a type of cold abrasive processing from secondary scale, burn-on, rust and other contaminants. In addition, this method can be used for cleaning glass or stone, as well as for removing from a metal surface various coatings(enamel, galvanized, primer, etc.). The sand is moved by a directed air stream or a jet of water (when water jetting).

Cleaning hardens surfaces, extends service life and prepares well for further coating or welding.
Quartz sandblasting has its advantages:

• thorough cleaning not only from scale, rust, old coating, but also from grease, which is extremely important for subsequent coating;
• increased adhesion (adhesion strength);
• versatility;
• economic benefit due to the low cost and availability of quartz sand.

The consumption of sand in each specific case depends on various factors: the power of the sandblaster, the amount of work, the degree of contamination of the base, the fraction of sand, the size and technical characteristics nozzles and some others.

For an approximate calculation of the average consumption of sand, we give the following general ratio: 30 kg / 1 m2. In the case of using low-power units, the air flow of which is 200 l / min, the sand will go about 0.25 kg / min. In high-power compressors operating with an air flow rate of up to 10 cubic meters / min, the consumption of sand will be about 12 kg.

The most common case in practice - it is necessary to clean a large metal structure or walls from paint and rust for the next painting. Here, ordinary, inexpensive, non-fractionated river sand is suitable. The main thing is to sift and dry it thoroughly before loading it. Acceptable humidity - sand should wake up freely when clenched in a fist. In addition, its fraction must be suitable for the size of the nozzle. Work should be carried out at a distance from home or in a sealed room with dust suppression equipment.

Craftsmen sift ordinary sand for a sandblaster in different ways: through a piece of tulle, construction mesh(panel), abrasive mesh, mosquito net, household fine sieve (for flour). Better to sieve twice or thrice. Thus, there are many options for cheap preparation of quartz sand for a sandblaster, up to zero price. Of course, if it is possible to use quartz sand, fused alumina or fine cast iron shavings, then the result will be excellent.

Modern industry produces various settings for drying bulk solids... These include a rotary sand dryer. Drying chamber with a built-in sieve allows you to significantly reduce the drying time and combine it with sieving sand, which will ultimately increase its quality.

In a domestic environment, drying sand for sandblasting is possible in one of the following ways. Secure a sheet of metal or metal box on the legs. Make a fire under it, or install a ten or another heater. Pour raw river sand on metal surface for drying. You can also dry the sand spilled on film or other material using a heat gun.

Where to get sand for sandblasting

Plastering surfaces is an integral part of the interior decoration. The final result of the repair depends on how well it will be performed. If you do all the work with your own hands, you should know which sand is best for plastering walls.

Choosing a filler for plastering walls

Sand can be called versatile material since it has found its application in all construction works Oh. As you know, it can be river and career. On the question of choice suitable sand for plaster, the opinions of experts differ. Some say that the river is preferable, since it does not contain foreign impurities, clay and foreign debris. This results in a better quality mortar and strong adhesion to the wall surface. Others believe that the presence of clay particles in the material from the quarry gives the mixture plasticity, so it is easier to apply to the substrate.
If you do routine repair in an apartment, then a quarry filler is quite suitable. It turns out that one type of filler makes the solution durable, and the other makes it easy to use. Which one to choose for you - decide for yourself, depending on your needs.

Quarry and river sand

The choice of filler depends on the thickness of the layer to be applied.

For finishing work with a thin layer, it is best to use river sand. Compared to other types of this material, it is environmentally friendly. It is extracted from the bottom of the river by a dredger. In such a sandy aggregate there are no clay particles and practically no stones. With an average size of up to 2.2 mm, it does not shrink, which makes it possible to use it for plastering walls and masonry.

If it is supposed rough finish walls with a thick layer, it is not recommended to use material of river origin. As a result of many years of exposure to water, sharp edges have been erased on the grains of sand. And therefore, it consists of small smooth balls that do not adhere well to the base and to each other.

Pit sand can provide a stronger coating with good adhesion. This ensures long term finishing services. It owes its origin to weathering. Quarry sand is formed from quartz rocks, mica and feldspar. Mine it open way from rocks. The cost of such a filler is much lower than that of a river. When purchasing a plastering material, be sure to check if it has been rinsed or cleaned.

Filler types for cement-sand mortar

Sand aggregate is divided into types according to the size of grain fractions:

• coarse-grained with a grain size of 2 to 4 mm;
• medium-fraction with a grain size of 0.5 to 2 mm;
• fine-grained with a grain size of 0.25 to 0.5 mm.

For plastering walls with your own hands with a cement-sand mortar, medium-fraction sand is usually used. It must be of high quality, without impurities. How smooth and uniform the layer will be depends on the size of the sand grains. The smaller they are, the easier it will be for you to work with the solution. It is perfect for finishing alignment floor or walls. For the first (rough) layer of plaster, coarse sand is used. For the preparation of plaster mortar, it is worth purchasing already cleaned and sifted sand.

It is important to know that even with a high roughness, the finer it is, the more binders and water are needed to envelop it.

How to sift sand correctly?

To correctly and efficiently sift the material for the cement-sand mortar, you will need a large sieve or wooden frame on which you can pull the mosquito net. If the volume of the sand filler is small, then a regular cut of unnecessary tulle is quite suitable. Sand for preparing a solution for plastering walls must be dry. But if it contains clay impurities, then it must be rinsed, and then wait until it dries completely.

1. Install the sieve on a container into which sand will be poured.
2. Pour the sand slowly in the form of a slide and then it will sort itself by size. The smallest one will be at the top. It is great for grouting.
3. It is necessary to throw the sand filler with a shovel from yourself. With this method, fine sand will lie closest, coarser sand farther away, and pebbles will fly off to the side.
4. If there is wind, you can also use its help. In this case, the sand is poured from a slightly raised container or thrown up with a shovel. The little one will be the farthest.

GOST standards

Not only various products are subject to standards and norms, but also natural materials. To find out if the sand pit filler meets the requirements of GOST, there are various checks.

The grain size composition of the sand filler is determined according to GOST 8736-93. To do this, it is sieved through sieves with cells of different sizes: 0.16; 0.315; 0.63; 1.25; 2.5 and 5 mm.

They also determine the resistance of sand to the influence of alkalis. This requirement must be taken into account when making concrete. There is a list of minerals that cannot be used for building mixtures.

According to GOST 8735, career construction sand always treat the sample with NaOH (sodium hydroxide) solution. This is a test for the presence of organic impurities. As a result of the check, he will not change the color of the mixture to a darker one or which matches the sample.

Cost of sand aggregate for plaster

When making repairs, people usually try to immediately make an estimate of the purchase costs. building materials... The cost of sand is relatively low, but taking into account all costs, do not forget about the investment in its purchase.

You should know that the higher the price of the material, the more actions were done with it during flushing and extraction. One of economical options will be a career, not washed and not seeded. Its cost per 1 m3 ranges from 350 to 450 rubles. Sifted or water-purified sand filler for construction work will cost from 600 to 750 rubles per 1 m3 + delivery.

The cost of river sand is much higher than that of quarry sand. The cost of purchasing it will be from 800 to 1000 rubles per 1 m3.

The most expensive material is fractionated quartz filler. A purchase from 10 tons with delivery will cost about 4,800 rubles per 1 m3.

Probably, a lot of irritation is sometimes delivered by pebbles in a solution, especially if you are trying to lay a brick and make the seam as thin as possible.

But I didn't have to sift through the sand to prepare a mortar for laying a stove or plastering walls. I was lucky with this, we have no problems with sand. In our places they generally extract it industrially(excavators, wagons ...), but there are also spontaneous holes in the glades. Sand of medium size, not dusty, homogeneous, without foreign inclusions.

However, people say that sifting has to be done. And although this activity is not as simple as it seems, for a true self-builder, obviously, there are no problems at all. Here, Victor writes:

Sand. Sifting sand through 3mm mesh is no problem. And when I tried it through a 1.5 mm mesh, the classics did not work here (with a shovel on an inclined mesh or chatting back and forth together), and the sand is damp, the mesh immediately clogs up.

Therefore, the idea came to sweep the top dry layer into a scoop with a broom and then "drive" it along the mesh with a brush. In good sun, during the day I slowly sifted about a cube of fine sand, without overloading my old back.

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Posted: 06/20/12
Updated: 11/08/14
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Home> Furnace works> We sow sand for mortar.

Egor
You can fix the wire on the terminals of the Krona battery with a tube cut from the cap of the medical needle.

What sand is needed for plaster

Plaster

What kind of sand is needed for construction (mortar for plaster, screed) river, quarry, or some other kind?

I want to order, but they ask which one is needed.

• Sea sand, building sand - for nothing they drag it along the river in barges far away from the land?

  All are needed, and here are the prices. Quarry sand from 350, Quarry washed sand from 490, River sand from 580, Seeded sand from 500, Coarse sand from 620, River sand, packed in bags (in 1m3-24 bags) from 60 rubles / bag! This is 1,440 rubles / cubic meter.

• River.
• Alluvium. For concrete screed in general, anyone will do, but for plaster you will still sift through a sieve (if you do not buy a ready-made mixture for plaster, which is better).
• mdaaaaaa. Where am I? to the beginning of the 20th century? sand in screed and plaster - last century... screed ready mix in bags. plaster - also ready mix in bags
• Better river.

Preparation of mortar for plaster

Preparation of the solution

Anyone can prepare a solution for plaster, there is no difficulty in it. As my friend says, he took cement, added sand to it, chopped it, added water, chopped it again, and got a solution. People who are engaged in plastering. You will be told that each operation needs a different solution. That is why we will consider how to prepare solutions for plastering work. The preparation of any plaster solution consists of such stages. In the first, you need to prepare the sand. Secondly for different solutions use different binders, which I also need preliminary preparation... First, having prepared all the necessary components, and only then proceed to the direct preparation of the solution.

Cement-sand mortar

To prepare a cement-sand mortar, we need cement, sand, water. It is better to take quarry sand for plastering. Sand preparation consists of sifting it and removing foreign materials such as clay. For sifting, we use fed. For spraying and filling with goggles 3x3 mm for covering 1.5x1.5 mm. To remove clay impurities, we wash the sand. We check the cement for freshness, for this we take it in our hand and squeeze it, if it flows out, then it is fresh and responds to its marking, which is indicated on the label. If it becomes a lump, or small lumps remain in the hand, then the cement has lost its properties, and therefore more will be needed to prepare the solution. Determine empirically.

The preparation of the cement consists in sifting it to separate the lumps. We measure the prepared material in the required quantities. For example, for plaster you need a solution of grade 100. The question is how to prepare it. In order to prepare the mortar, we need to find out what brand of our cement is 400 or 500. Our cement is 500, then to prepare a solution of 100 we need to take one part of cement and five parts of sand. We pour half of the sand into our container, then pour out the entire portion of the cement, and add the rest of the sand. We mix all this thoroughly. We get a gartsovka, add water to it, bringing the solution to a sour cream of a similar mass, which will correspond to 10-13 cm of immersion of a standard cone. This is a manual way of preparing the mortar if you are preparing with a concrete mixer. The cooking procedure is different. We start the concrete mixer, first check its grounding. First add water to the concrete mixer, and then required amount sand and cement. We add water until the required density is obtained. To prepare a solution of grade 100, we consume approximately 25 kg of cement of grade 500, 10 buckets of 12 liter sand and 3-3.5 buckets of water. For stronger solutions, we increase the amount of cement, for weaker solutions, we decrease it.

Cement-lime mortar

For cooking, cement- lime mortar, we perform all the same actions as for cement mortar plus preparation of lime. Lime is diluted to obtain milk of lime, and filtered through sated with glasses 2x2 mm. The solution is kneaded on milk of lime. To the required consistency, bring by adding water.

Mortar

After preparing all the components. The lime mortar is prepared in such a way, first, the required amount of lime is given, and gradually stirring, sand is added. Usually take one serving of lime and three servings of sand. To check the strength of the lime mortar, proceed as follows. Take seven bricks and fasten them with a lime mortar in a column and let dry. A good mortar should support the seven-brick post if carefully lifted by the top brick.

Clay solution

For cooking clay solution do so. I soak the clay, for a day, until it is completely softened. Next, the clay is filtered through sated, with glasses 2x2 mm, and two to four portions of sand are added to this portion, depending on the fat content of the clay, bringing to the required consistency.

Lime-gypsum mortar

The preparation of these solutions has a number of features. In the first, they are prepared in small portions, as they set very quickly for 10-15 minutes. Preparation of the solution, first prepare milk of lime, and then add gypsum to it. And this solution is used within 10 minutes. Another method is the preparation of dry mixtures, which are diluted with water, for direct use. An example of such mixtures is putties.

I check the consistency of the solution, empirically, collect the solution on the trowel and it must be kept on the trowel, but also be mobile. Some people can't figure out the ratio numbers, for example 1: 0.25: 6, what these numbers say. And they say that the solution consists of two astringent components of the first, you need to take one portion of the second 0.25 portions and sand 6 portions. The first figure is often asked for this amount of cement. No, only in cement mortars. In the lime-gypsum solution, there is no cement at all. Therefore, the first indicates how much lime the second is gypsum and the third is sand. In a cement-lime mortar, respectively, the first will indicate how much cement, the second how much lime and the third sand

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What is the best plaster composition? (page 1) - works, materials and constructions - construction forum of donetsk

In general, it is better to work on clay sand, since a more plastic solution is obtained on it, however, clay sand is not desirable for exterior plaster since clay impurities reduce frost resistance, it is also not advisable to use clay sand for a greasy solution (a solution with a high cement content) due to the fact that clay impurities increase the shrinkage of the solution and plaster for wet rooms because clay reduces the water resistance of the plaster.

Clay sand is easily distinguishable by color, as it is colored with clay inclusions from brown-yellow to brown-red, and sand with a low clay content, it is light yellow or generally white.

What sand is needed for.

Catalog

• Nonmetallic materials
  • Sand
    • River sand
    • Quarry sand
    • Sea sand
    • Quartz sand
    • Coarse sand
  • Lime
    • Quicklime
    • Slaked lime
  • Crushed stone
    • Granite crushed stone
    • Crushed gravel
    • Lime crushed stone
  • Crushed stone-sand mixture (SCHPS)
  • Chernozem
  • Granite screening
  • Expanded clay
• Lumber
  • Planks
    • Terrace board (Decking)
    • Edged board
    • Timber imitation
    • Floor board (tongue)
  • Sawdust
  • Croaker
  • Plywood
• Dry mixes
  • Tile adhesives
    • Osnovite tile adhesive
    • Knauf tile adhesive
    • Ivsil tile adhesive
    • Volma tile adhesive
    • Glims tile adhesive
    • Unis tile adhesive
    • Bolars tile adhesive
• Reinforced concrete products
  • Well rings
  • Asbestos-cement pipes
  • Benefits of using reinforced concrete slabs overlap
• Wallpaper
  • Non-woven wallpaper
  • Textile wallpaper
  • Vinyl wallpapers
  • Paper wallpaper
• Aquapanel Knauf
• Knauf gypsum fiber
• Plasterboard Knauf
• Useful articles
  • Sawdust mulching What sand is needed for.
  • Pellet production
  • How to glue non-woven wallpaper?
  • Needle-punched carpet. Features of the production process.
  • Stylish garden lights brighten the landscape
  • Heating film is unpretentious in maintenance
  • Professional production of paving slabs
  • Stainless steel products
• Free construction bulletin board

Based on materials from the site: http://shpatlevko.ru

How to knead cement with your own hands correctly and in the right proportions

In fact, the cement slurry is mixed, and the cement is only a constituent part of the cement slurry, which includes two more components: sand and water. The classic is the ratio of the volume of sand to the volume of cement 3: 1 (three parts of sand and one part of cement). Such a solution can be used both for plastering work and for brickwork.

To prepare cement mortar in small quantities and at home, you will need a plastic or metal container. Three volumes of sand are first poured into it, then one volume of cement is added. The cement must be fresh and dry, without hard lumps. If there are lumps of clay, earth or stones in the sand, then such sand must be sieved first.

Sifting sand

It is worth considering that the less impurities and large particles in the sand, the better and smoother the surface will be (when pouring) For sifting, you can use a sieve, colorant or fine mesh, or drill holes in a bucket with a thin drill, as my neighbor in the garage did. I had to sift sand in large quantities, so I put together a frame of wood one and a half by one and a half meters and nailed metal mesh... It only remained to throw in the sand and shake it over the edge. Fine-grained sand for cement mortar is ready. You can find sand in quarries, on a river, or simply buy it in a store.

Kneading process

Cement and sand are actively mixed with a spatula or special nozzle for a drill in a container until a homogeneous mass is obtained. If it is necessary to prepare a larger volume of solution, then use a concrete mixer or a wide bath, in which the components are stirred with a shovel. It is very convenient to knead the solution on a piece of linoleum or vinyl (from which advertising banners are made), but be careful - they can be easily torn with a shovel. After stirring, water is added to the container, the volume of which is approximately equal to the volume of cement. The components are constantly mixed until a homogeneous mass is obtained. Do not make the mortar too liquid, it should adhere well to the spatula or trowel. The ready-made solution can be applied within two hours. Therefore, calculate the volume that can be consumed during this time.

Consider an example of mortar consumption for brickwork:

The consumption of mortar for brickwork is almost the same for the production of any type of brickwork. The only thing that changes is the brand of cement.

For the preparation of 1 m 3 of cement mortar, 8 bags of cement, 50 kilograms each, are taken and mixed in proportion with sand 1: 4, where one part of the sand is also equal to 50 kilograms. For 1 m 3 of brickwork of a solid wall, approximately 0.25–0.30 m 3 of cement mortar is consumed.

If the solution for production internal works is kneaded on the basis of, say, a lime mortar, then cement is mixed into it in a ratio of 1: 3 or 1: 5, again based on the brand of added cement ("M", "D"). Depending on the required amount of cement, both manual and mechanized mixing methods can be used.

Cement mortar for the foundation.

For mixing, we need: 4 parts of dropout or crushed stone 5-10 mm in size 1 part of cement grade m400 or m500 3 parts of sand as well as water with a volume approximately equal to a part of cement It should be noted that the components are mixed not by weight, but by volume, that is We knead like this: pour one bucket of cement into a concrete mixer, fill it with a bucket of water, then fill in 3 buckets of sand, after which we fill in 4 buckets of sand.

Mixing the mortar in a concrete mixer

TO ORDER

Seeded sand- this is quarry sand, which is sifted through sieves with different sizes cells, achieving the desired grain. Thus, unnecessary small impurities and coarse fractions are eliminated. Such sand determines the quality of the mixture produced (indicator of shrinkage and strength) - the more homogeneous the sand, the higher the binding properties of the mixture produced. The larger the granules, the more "mobile" the concrete will be.

Seeded sand it is used in a wide range of construction works, depending on the resulting sand grain size. It could be making concrete mortars, fundamental, plastering work, improvement of the territory, Men at work etc.

once- Price for one-time deliveries.

reg- Price for orders with regular deliveries.

Seeded sand

Almost any type of construction uses sand. It can be river, quarry and sea. The name characterizes the method of extraction, on which the properties of the material and its price depend.

Quarry sand is the most popular, mainly due to the fact that it is inexpensive. The price is explained very simply - the material is easy to extract (in open pits), it is processed on site, transportation costs are small, since the mining sites are usually located nearby.

All quarry sand is contaminated different kinds impurities. These can be rock fragments, stones and other large inclusions. It is impractical and even dangerous to use it in this form. The sand is cleaned of impurities by washing or sieving.

Therefore, quarry sand is washed and seeded. Washed - undergoes hydromechanical treatment, during which clay, dust and other impurities are washed out.

Sand sifting mesh

But pebbles remain in the sand. When sifting, they are removed along with the rest of the coarse fractions, but the clay is not completely removed.

Seeded sand has a uniform granular structure and is well suited for the preparation of mortars, concrete and other building mixtures. It is used in production reinforced concrete products... The material will keep the equipment intact, because it does not contain pieces of rocks large sizes that lead to equipment breakdowns.

Seeded sand characteristics

Seeded sand characterized by filtration coefficient and size modulus. The size of the sand granules depends on the characteristics of the sieves through which it is sieved. The indicator affects the modulus of the sand fineness. This characteristic is necessary for the selection of sand when carrying out specific types of work.

Most often, the modulus of material fineness ranges from 1.2 to 1.8 mm, for coarse-grained it reaches 3.5 mm, for medium-grained material - from 2.1 to 2.8 mm. The filtration coefficient ranges from 3 to 10 m per day. Have more pure material the indicator is higher. Coarse seeded sand is suitable for construction drainage systems and highways.

Application of seeded sand

If during construction work, the content of impurities in the material is not critical, then seeded sand more profitable to use than river or washed. It is suitable for:

Construction of zero-cycle residential buildings and industrial facilities;

Foundation and plastering works;

Construction of roads and asphalt concrete mixtures;

Building materials production;

Drainage construction;

Improvement of various territories;

Brick production requires careful attention to the quality of raw materials. It depends on the fraction of the sand. That's why seeded sand before use, they are also washed. Thus, a homogeneous mixture is obtained that does not have foreign inclusions leading to the brittleness of the brick.

Quarry sand - environmentally friendly natural material... This property and its low cost allows it to be used for processing roads in winter. It increases the traction of the wheels with the road surface, reducing accidents.

In the production of concrete products, attention is paid to the homogeneity of the sand. The elasticity and strength of products depends on it. The quality of the material also affects frost resistance, water absorption and durability of structures.

This material is not always worse than river or washed material. A number of deposits supply seeded sand comparable in quality to other types of sand.

LLC "StroyTekhKomplekt" delivers sand seeded in bulk at low prices.

TO ORDER

To prepare quality sand-cement mortar a wooden frame with a tensioned on it is required mosquito net or you can simply take a large sieve to sift the sand correctly and well.

With a small volume, even a piece of used tulle material will come in handy.

How to knead cement with your own hands correctly and in the right proportions

If a solution is being prepared for plastering walls, then the sand is taken only dry. In the presence of clay impurities in it, the sand is washed and thoroughly dried.

A sieve is strengthened on the container into which the sand will be sifted. The sand itself is sorted by size if it is slowly poured in a small hill. The smallest caliber material will remain on top, perfect for grouting.

Throwing a sand filler should be carried out with a shovel away from you, so the trapped stones fly off to the side, then coarse sand falls, and the smallest one lies close.

In this case, the help of the wind, if any, is also used. In this case, the sand is thrown up with a shovel or poured from a slightly raised vessel and the fine sand then flies off into the distance.

You can buy sand in Rostov-on-Don in our online store Bun.su

You can read about the use of sand for plaster in our article.