Sand concrete grade M300: application features and performance characteristics

Sand concrete grade M - 300 “Stone Flower” is suitable for both external (foundation construction, production of concrete tiles) and internal work (restoration of concrete walls, floor screeds). This material has increased resistance to moisture, frost and atmospheric influences, thanks to which building structures last longer in any climate.

In the production of this material, only high-quality granular compounds and plastic additives are used; they give sand concrete excellent performance characteristics - resistance to moisture and negative temperatures, high strength.

This material does not emit harmful components, does not corrode and can withstand heavy loads. Unlike similar compositions, sand concrete m 300 does not wear out over time and does not delaminate.

It is used for the following work:

• Construction of high-strength foundations;
• Production of high quality self-leveling floors ;
• Pouring screeds that are perfectly smooth and resistant to stress due to the use of a fine-grained composition;
• Construction of paths for various purposes, and similar elements of private estates.

The ability to adjust the strength of concrete by adding plasticizers or different amounts of sand, making it suitable for strengthening reinforced concrete structures and staircases.

Characteristics of sand concrete M300

Application and consumption rates

Instructions for using sand concrete M300 should be indicated on the packaging. If for some reason it is not there, you can use the following recommendations:

1. The solution is mixed with water at room temperature.
2. The proportions of M300 sand concrete and water depend on the composition of the initial mixture, so it is strongly recommended not to deviate from the manufacturer’s advice. Typically, 10 kg of mixture requires 1.7 liters of water.
3. Do not pour water into the construction mixture. The dry powder should be gradually poured into a container of water with constant stirring and diluted until the lumps are completely dissolved. To do this, you should use a special device or drill with a special attachment.
4. You can control the proportions visually, based on the thickness of the solution. The result should be a fairly viscous homogeneous mass with high plasticity.
5. Before use, it is advisable to let the solution sit for five to ten minutes.
6. The optimal temperature for laying the mortar is from +5 °C to +25 °C. However, the technology can be used at temperatures as low as -15 °C.
7. The properties of the mixture ensure good adhesion. To further increase this indicator, it is recommended to carry out preliminary cleaning and preparation of the base.
8. The prepared solution is viable for two to three hours. During this time, you need to have time to complete all the required work.
9. The solution hardens within a day. The structure gains maximum strength after 28 days.

The composition and proportions of M300 sand concrete have a slight effect on the required amount of water and the volume of solution output. Typically, one and a half to two tons of dry mixture are required to fill one cubic meter. Calculation of the consumption for the screed can be done in a similar way if you decide on the required thickness. For a standard screed 1 cm thick, 20 kg of mixture will be required.

Sand concrete is a modern building material, lightweight and easy to use. The quality of the mixture greatly depends on the production conditions. You should not trust unverified suppliers, especially if the packaging does not indicate all the characteristics of the product and instructions for its use. Using a ready-made construction mixture saves time on searching for the required sand on sale and mixing it with cement.

Rules for laying sand concrete screed

Sand-concrete mixture of grades M300, as well as M200 and M250, is widely used when constructing floor screeds. To ensure that concrete does not shrink strongly, does not crack, and is convenient to use, it is necessary to select the correct mixture taking into account the characteristics of the room, follow the rules for preparing the solution and laying technology.

Key points to pay attention to when installing a screed:

• choose a sand mixture for screed from a trusted manufacturer, since the use of low-quality sand with impurities or cement below M300 reduces the strength of the finished concrete;
• pay attention to the production date and appearance of the dry mixture - the properties of cement weaken over time;
• the appearance of the material is important - a high-quality mixture can form lumps when in contact with air;
• use sand mixtures in accordance with their purpose and prepare the solution strictly according to the instructions;
• mix in a construction mixer or concrete mixer;
• Before pouring the screed, clean the surface thoroughly;
• let the prepared solution sit for 10-15 minutes and work it out within an hour;
• observe the temperature regime - for application and proper drying of the concrete mixture, the optimal temperature is from +50C to +200C;
• The screed must be moistened with water or covered with plastic film to prevent drying out and cracking.

Attention! The finished solution is suitable for use within 2-3 hours.

An important factor influencing the quality of the screed is compliance with the curing time of the mixture. To do this, you need to understand how long sand concrete takes to dry. The first stage of hardening occurs 3-4 days after pouring the screed - movement on a leveled surface is allowed. On day 7-8, strength reaches 55-60%. Complete hardening of the concrete and its achievement of the declared strength is achieved 28-30 days after pouring the screed.

Types of compositions and requirements

Despite the fact that any CPS composition includes cement and sand, the final characteristics of the solution can vary greatly. The main parameter is strength, which depends on the ratio of components. The level of strength and resistance of the cement-sand mixture to various influences depends on the scope of application of the solution. Therefore, for different jobs, the DSP mixture is prepared according to a specific recipe.

Types

The proportion of cement and sand affects the characteristics of the mixture. As a rule, one brand of cement is used in conventional mortars. But the brand of cement is not the same as the brand of mortar. So, you can make a cement-sand mortar M150 or M300 from it, taking the binder in a certain volume. On the other hand, for the required grade of cement, grades of cement are taken an order of magnitude higher. The binder is supplied in bags of 25 kg or 50 kg.

Main brands of cement-sand mixtures:

• M100 – the greatest strength, from M200-M500 cement, with a certain volume of sand.
• M200 is the most common type of mixture, suitable for creating surfaces and paths in everyday life, withstands light loads, dries quickly and is not demanding on conditions.
• M300 - floor slabs and foundations of good strength are made from mortar.
• M400 - durable concrete prepared on the basis of M400/M500 cement, used for multi-storey construction, reinforced concrete floor slabs, etc.
• M500 is the most durable concrete that is used in private housing construction (there are also grades M600, M700, but they are prepared for special objects). Withstands high loads, retains its original properties for many years, and is not afraid of external negative factors.

In addition to the above, there are also intermediate grades - this can be a cement-sand mixture M 150, M250, M350, etc. But their characteristics do not differ significantly from those of the main grades of concrete.

Supplements

Before diluting cement with sand (choose the correct proportions, measure everything), you should think about the possibility of using additives that change the properties of the mixture. Additives are introduced into the composition to adapt the mixture to the required conditions and increase/decrease certain indicators. Thus, using additives, you can even obtain liquid glass used for plaster.

Dry cement mixtures, as a rule, do not need modification, but they are also more expensive. But if you decided to prepare the DSP yourself, then the list of possible additives and their properties will come in handy.

What can be added to the sand-cement mixture:

• PVA - makes the solution more plastic and increases adhesion to other materials. Before starting work, you need to select the correct proportions for the cement mortar.
• Lime - only slaked lime is used. The additive slightly increases strength and vapor permeability, but requires strict adherence to the ratios. Most often, lime is added to plaster solutions.
• Graphite and carbon black do not affect the physical properties of DSP, but are relevant in the form of dyes.
• Detergents - improve the plasticity of the solution, are introduced into the mixture after water in exact proportions.

You should think about additives before mixing the mixture, since not all substances can be added after adding water to the composition - some only at the stage of mixing the dry ingredients.

Application in construction and repair

All mixtures are divided into universal, specialized, installation and masonry and plastering.

The material has a certain brand strength, which should be taken into account when carrying out work:

• sand concrete M100 - most often the mixture is used for plastering work. The material does not have good strength (100 kg/cm²) and water resistance. The composition includes river sand of fraction 0.8-1.2 mm;
• sand concrete M150 – suitable for repairing facades and plastering. Often used for pouring screed and brickwork. The strength of the finished coating is 150 kg/cm². The composition includes river and quartz sand 0.8-2.0 mm. The material is lightweight and reduces costs. It can be supplied to a height of up to 52 m using a concrete pump;
• sand concrete M200 - can be used for arranging screeds for heated floors and other interior work. The composition includes fine-grained river and quartz sand. The finished coating is resistant to deformation and can withstand loads of up to 200 kg/cm²;
• sand concrete M250 - the material is characterized by durability and high strength (250 kg/cm²) and is used in the construction of various technical buildings;
• sand concrete M300 - the mixture is used for the construction of various high-strength concrete structures, the production of expanded clay, pouring floors, etc. This is the most versatile brand. Such partitions and walls can be easily plastered and tiled. In addition, the practice of using such sand concrete in monolithic construction has fully justified itself.
• sand concrete M500 - rarely used in private housing construction, applicable when carrying out work on civil and industrial construction sites.

The use of heavy concrete in private construction may be unacceptable when limiting the weight of finished structures. It is in this case that it is advisable to pay attention to sand concrete

Regardless of the brand, be it M150 or M300 sand concrete, the instructions for use should be the master’s main guide for preparing the working solution.

Due to its homogeneous and dense consistency, sand concrete most often does not require additional reinforcement; the shrinkage of the finished mixture is close to “0”.

What is luxury sand concrete?

Materials produced under this marking have a range of distinctive characteristics:

• increased concentration of Portland cement;
• increased elasticity (mobility);
• Strength gain is achieved twice as fast.

Calculation for materials

Sand concrete M300 is mixed with cold water at temperatures up to +20 degrees without any impurities in the composition. Water consumption is determined by the proportion: 10 kilograms of dry mixture requires 1.7 liters of water. Mix the solution with an electric drill with a special attachment.

If you plan to prepare large volumes, use a concrete mixer. To improve the quality of mixing, first pour two-thirds of the volume of water required for the composition into the drum, then add it as the concrete mixer works. The solution should be viscous, homogeneous, and plastic. Before starting to work with it, it is advisable to soak the concrete for 10 minutes.

Then you can work with the solution: pour out the concrete and level it with a rule or spatula, then remove air bubbles with a vibrator or bayonet.

For plaster

To prepare the mixture, the relevant proportion is 1:3. You will need about 17 kilograms of cement per square meter with an average thickness of the plaster layer.

For masonry

Here special attention is paid to the sand - it must be clean, without impurities or inclusions. Only in this case will it be possible to knead a homogeneous mass that can reliably hold the masonry material together

The proportions used are different: both 1:3 and 1:6. Consumption per square centimeter is 0.05 m3.

For screed

For floor screeding, M150/M200 grade mortar is usually used. Take in a ratio of 1:3 or 1:2 (depending on the brand of cement used). Fiber fiber is often added to the solution in volumes of 800 grams per cubic meter. Consumption is 20-21 kilograms per square centimeter.

Cement-sand mixture is one of the most popular repair and construction materials. But a large range of products makes it difficult to choose the optimal composition

Therefore, calculations must be performed carefully and accurately, following the technology and taking into account the scope of application of concrete

Calculation of sand concrete costs

The characteristics of this material allow it to be used in creating wear-resistant surfaces, leveling them and when laying stone, brick and tiles. In addition, it is used as a composition with fine grains for concreting.

The main conditions for this are high-quality preparation of the surface: it is necessary to clean it well, level it and then prime it, and treat it with agents that resist the development of fungus.

When mixing the working solution for 40 kg of dry mixture, add 6.5-7 liters of water, after which water is poured into a clean container, and the dry mixture is added, the composition is mixed, allowed to stand for 5-10 minutes, after which it is mixed again. Working time with mixed composition is no more than 2 hours.

But when mixing, it is necessary to take into account the manufacturer’s requirements; for compositions without additives, the preparation conditions are almost the same, but for sand concrete with all kinds of additives this can play a decisive role. In addition, it is necessary to take into account the requirements for preparing the base: use recommended priming materials, which improves the characteristics of the surface or final indicators (setting time, improving adhesion).

Also, different manufacturers may recommend the use of concentrated additives intended for specific purposes: from strengthening compounds to antibacterial agents.

The cost of the finished mixture per 1 m2 of surface varies depending on the thickness of the layer: for example, for a 3-5 cm screed, 2.5 kg/m2 of solution is enough. For 1 m3 of concreting, 25-30 bags of dry mixture without adding filler will be required.

When using fillers (it is permissible to add fine gravel, fine crushed stone, sand to the solution), the properties of the finished concrete change and the consumption of the dry mixture becomes less.

In order to more accurately calculate the consumption of sand concrete for the entire area of ​​the room, it is necessary to establish the average thickness of the screed layer over the entire floor; this can be done using “base survey”. For this purpose, it is best to use a laser plotter; in the drawn plan of the room, height levels with a density of 1 mark per 1 m2 of room are placed, the data obtained from the measured points are summed up, after which the result is divided by the number of measurements.

From the height of the “finished floor” it is necessary to minus the thickness of the final coating, taking into account the base material, for example, porcelain stoneware will be laid on the floor as a base, the thickness of this material in most cases is 8 mm, the total thickness with the adhesive solution will be approximately 12-13 mm.

For example: in a room of 60 m2, it is necessary to pour a screed 6 cm thick. To level the floor you will need about 19-20 kg of sand concrete per 1 m2. Dry mixture x 6cm = 120kg, material costs for the entire area of ​​the room will be 7200 kg, 150 bags of sand concrete m 300.

Technical characteristics of sand concrete M300

Before moving on to the section - sand concrete instructions for use, let's find out what features and technical characteristics the dry mixture in question has.

The first parameter we will consider will be the brand compressive strength. Here it is immediately worth noting that after 30-40 days, after hardening, M300 sand concrete is able not to deform under a pressure of 29 MPa (if it is a really high-quality material). Due to the fact that the construction suspension contains fine sand, dust and a precisely calculated dosage, it is impossible to create a similar material with the same technical characteristics at home.

The filling fraction can be different, it depends on the purpose, that is, the purpose of using the M300 mixture. If it is necessary to use sand concrete for casting slabs and reinforced concrete structures, then gravel is better suited as a filling fraction, but if it is necessary to use such material for the production of concrete products, then screening is an excellent option.

One of the main advantages of the material in question is almost zero water permeability. After the hardened material reaches its highest level of strength, the moisture content in it will be no more than 0.9%. If you purchase high-quality sand concrete M300 with correctly selected additives, then the indicator in question will become even lower.

Frost resistance. In this case, we can immediately say that this indicator is quite high, and in practice this has been proven more than once.

The color of sand concrete is gray (depending on the amount and type of additives, it may be slightly lighter or darker). Material consumption is 2 kg per meter, layer thickness ranges from 15 to 50 mm.

Sand concrete - GOST

According to the classification of the state standard, sand concrete belongs to fine-grained concrete, and according to its intended purpose, to structural concrete and has the characteristics indicated in the tabular data.

Dry building mixture perfectly accumulates generated heat, therefore it is successfully used to create a layer covering the heating element in a “warm floor” system.

The quality of dry construction mixture is regulated by GOST 7473-94, in accordance with this, markings are applied to the product. It allows you to find out exactly what fraction of sand was used as a filler, the rate of hardening and other parameters.

Peculiarities

Sand concrete is often referred to as an intermediate element between cement and concrete mixture. Dry material is often used for restoration, repair and construction work. It is lightweight and easy to work with, does not shrink, and has proven itself well on unstable soils. Sand concrete M200 is indispensable in the construction of concrete floors where serious loads are noted - garages, warehouses, shopping centers.

The mixture contains crushed stone and chemical additives, which ensures that the material does not shrink even with a fairly thick layer. Strength can be increased by using plasticizers, as well as ensuring sufficiently high frost resistance.

When adding various additives (especially to impart workability to the mixture), it is necessary to correctly determine the optimal volume in order to ensure the desired consistency without compromising the strength characteristics.

Pigments give sand concrete the desired color - there is also quite a wide variety here. The main thing is to choose the right supplement and work according to the instructions.

Preparing sand concrete for work

Sand concrete dry mix, presented on the construction market, is an almost ready-to-use material. Add clean water to the dry mixture in the recommended proportion and stir using a drill with an attachment until a homogeneous consistency.

The low cost and ease of working with sand concrete of this brand is a convenient option for use on private construction sites.

To prepare the finished solution, you need to carefully calculate the correct proportions of the required amount of dry bagged mixture. For example, a package of sand concrete m150 50 kg will require about 6 liters of clean water.

To obtain the stated strength of the solution, it is necessary to strictly adhere to the permissible proportions of water + dry mixture. The proportion of water for mixing the ideal solution is indicated in the instructions included with each package. It is not recommended to dilute the prepared solution with water during operation.

Basically, 10 kg of dry mixture requires 1.6 -1.8 liters of clean water. It is allowed to change the proportional amount of incoming ingredients, depending on the required mechanical properties of the solution.

Composition of sand concrete and main areas of application

Sand concrete is structural concrete. Refers to heavy, fine-grained concrete mixtures, which are widely used in repair and construction work. Its difference from lightweight concrete is the absence of large porous fillers in the composition of sand concrete.

Contains:

• Portland cement,
• sand of different fractions (up to 5 mm),
• water,
• additives to improve the characteristics of the mixture.

Portland cement is produced by grinding clinker and gypsum. Clinker is a product of firing a mixture of limestone (shell rock, chalk, limestone tuff, marble) and clay (loam, shale) in proportions, respectively, 75-78% to 22-25%. Corrective additives are used: bauxite, opoka, pyrite cinders, tripoli. Silicates and aluminates are added to increase strength.

Depending on the size of the filler - river or quartz sand - fine-, medium- and coarse-grained sand concrete is distinguished. The smaller the fraction, the more plastic and less durable the cement-concrete mixture.

The concentration of components in the finished substance is influenced by the brand of cement used and its shelf life, the moisture content of the sand, the purpose of the finished solution and its priority properties. Depending on the purpose of using the sand mixture, when preparing it, add 2-5 parts of sand of the required fraction to 1 part of Portland cement. Cement grades not lower than M300 are used. If necessary, additives and additives are included in the composition of sand concrete, the most common of which are:

• plasticizers - improve the plasticity and mobility of the mixture without adding excess water;
• fiber fiber – increases the strength of the concrete mixture, reduces shrinkage cracking;
• anti-corrosion additives – protect reinforcement in concrete and its surface from corrosion;
• granite chips – increases chipping strength.

The exact dosage of sand concrete components is selected by manufacturers experimentally and depends on the raw materials used and production technology. Different manufacturers have different proportions and additives, different quality of incoming raw materials. When choosing a sand mixture, it is necessary to give preference to reliable manufacturers with proven product quality, because “handicraft” production of the mixture can significantly affect the properties and, most importantly, the strength of the resulting concrete.

The main purpose is to use different grades with different properties at different stages of construction.

What is sand concrete used for:

• rough finishing of premises (plastering internal surfaces, installing floor screed in an apartment or house, plastering from the street);
• construction of foundations of different loads;
• construction of floors, frames, monolithic walls and other durable structures.

Depending on the proportions of the incoming components, compliance with the technologies for mixing and laying the solution, as well as the required temperature and humidity when pouring the screed and during the concrete hardening period, adding chemical or mineral additives, you can achieve the desired result with the characteristics stated in GOSTs.

Preparation of concrete

For large volumes of work, it is better to order concrete from the factory. Making large quantities of mortar by hand or even using concrete mixers is a difficult task, and laying it in batches requires additional effort to ensure that the layers adhere well. However, you can prepare concrete manually. In this case, there are two sequences of actions:

1. First, concrete and sand are mixed dry. It is mixed until the color becomes uniform. Then crushed stone is poured in, everything is mixed again, and water is added last.
2. First, water is poured into it and cement is poured into it. When everything is mixed, add sand and then coarse aggregate.

The order of adding components for concrete during mixing may be different.

In the first option, there is a possibility that during manual mixing, unmixed composition will remain at the bottom, near the walls of the container, which will lead to a decrease in the strength of the concrete. The solution is to mix everything well and thoroughly. But you can’t spend too much time on this: the solution will begin to set.

The second option has its disadvantages: obtaining a homogeneous cement laitance (a mixture of water and cement) sometimes takes a lot of time. As a result, there is simply not enough of it to form bonds with the backfill: the cement “seizes” and the strength of the concrete also decreases.

All this is not so critical when using concrete mixers, but it is also not ideal. There is another difficulty here. Concrete is usually delivered to the construction site in carts. The entire volume does not fit into one, and the remainder is left to spin in a concrete mixer. This is better than leaving it just standing, but if you mix it too long, the solution may begin to delaminate, resulting in lower concrete strength. The solution is two carts and two people to carry them. The filling method - first or second - choose for yourself.

For small volumes, concrete can be mixed by hand

So after all, how to prepare concrete. The choice is yours. If the volumes are small, you can knead by hand. Just do it carefully. To pour the foundation, it is better to order a mixer, but you can also use a concrete mixer (or two, depending on the volume). And to solve problems with the heterogeneity of the mixture (although it is better that it is good), treat the concrete being laid with a vibrator. Most of the problems will go away.

Next, we will talk about the requirements for concrete components, their sizes and qualities.

Tips and tricks

When mixing the M300 dry mixture, it is important to strictly follow the manufacturer’s instructions indicated on the packaging. A 40 kilogram bag usually requires a maximum of 7 liters of water

It is advisable to mix only with cold water and mix thoroughly with a mixer or drill with a special attachment.

The suitable temperature for work is in the range from +5 to +50 degrees, but if concrete is used at a lower temperature, it does not change its properties, but hardens and gains strength longer.

It is advisable not to mix the composition manually, as this can cause the mixture to become uneven and lead to the appearance of lumps and air cavities. After the solution is mixed, you need to let it rest for 5-10 minutes, then mix again and use it in your work.

Several recommendations for working with dry mix M300:

• It is better not to prepare a large volume of the mixture at a time, but plan to use the mixed mixture within an hour and a half.
• You need to prepare all working containers and tools in advance - they must be dry and clean (necessarily fat-free).
• All highly absorbent and porous surfaces are pre-primed, collapsing structures are pre-reinforced.
• Leveling and installation of beacons for pouring are required. When pouring a floor screed, it is enough to simply pour the concrete over the surface, and then carefully level it with the rule.
• During the first 3 days after pouring, it is necessary to prevent excessive evaporation of moisture by covering the poured concrete with a tarpaulin or film.
• To level a surface with minor defects, a layer of 10 millimeters is sufficient; if you need to make a durable layer between the base and the finishing floor, it is allowed to fill in a layer of up to 100 millimeters.

Dry mix M300 is a universal building material that is suitable for performing a wide variety of tasks and, subject to the preparation instructions and application technology, provides high levels of strength, durability, reliability and durability.

Which brand is best for floor screed in an apartment?

The variety of building material brands and their similar characteristics raise the question of which sand concrete is best for floor screed. The most popular brand of sand concrete is M300, which has universal characteristics for a wide range of applications in private construction and renovation. It is widely used for leveling floors in residential and industrial premises with different weight and temperature loads.

To screed the floor in the apartment, sand concrete grades M200 and M250 are used. If there are heated floors, pour a solution of M250 or M300.

Sand mixture M300 has low water permeability and good frost resistance, so it is often used to level the floor in the bathroom or on a cold balcony.

Number of PCB bags for brickwork and calculations on a calculator

Laying a brick wall should be done using a mixture with a grade corresponding to the brick. This structure is as durable and uniform as possible. In general, M100-M200 is used for masonry.

So it is necessary to take into account the quality and strength of the material (both the mixture and the brick). Using basic standards, approximately 250 kg of M100 mixture should be used per 1 m3 of wall.

If you prepare the solution yourself, then the proportion should be 1 to 4. Liquid should be added to the CPS, which is usually half the total weight of the mixture.

Of course, the laying of a wall greatly depends on the thickness of the seams; as the space between the bricks expands, the amount of mortar per 1 m3 also increases. The thickness of the walls also plays an important role, so for facing bricks laid in 1 layer, significantly less cement is required than for load-bearing walls of 2-4 bricks.

Calculation for masonry

Regulatory documents contain detailed recommendations and the relationship between wall thickness and the amount of mortar used.

Examples are presented based on ordinary bricks and the required quantity per 1 m3:

• wall 12cm - 420 bricks and 0.19 m3 of mortar;
• wall 25cm – 400 bricks and 0.22 m3 of mortar;
• wall 38cm – 395 bricks and 0.234 m3 of mortar;
• wall 51cm – 394 bricks and 0.24 m3 of mortar;
• wall 64cm - 392 bricks and 0.245 m3 of mortar.

A mixture of cement and sand - characteristics and preparation of mortar

As a result of mixing cement and sand, a sand-cement mixture is obtained, which, when water is added, becomes suitable for use. In large-scale construction, independent preparation of the mixture is often used, although there is also a DSP specially prepared at the enterprise.

Cement sand mixture

If you purchase a factory-made DSP, then in its composition, in addition to the basic components, there are plasticizers and other additives. They are used to give the solution homogeneity and plasticity; some add frost-resistant additives for work in the cold season.

Factory mixture

Preparation of cement-sand mortar

The preparation of cement mortar greatly depends on the brand of cement and the required mortar. From this the required ratio of ingredients is calculated.

The number of components strongly depends on the purpose of the mixture, so some types of work involve a smaller amount of sand (concreting) or, conversely, a larger amount (masonry).

For more flexible preparation of the solution, sand and cement should be mixed manually; the standard ratio is 1 to 3, but it can be 1 to 2-4. The mixtures are also different; a huge range covers most ordinary needs.

But it is not always possible to achieve an exact value due to the lack of information about the density of the material, because it may differ.

The purpose of cement plays an important role when choosing a brand:

• m100 is used only for plastering walls, approximate consumption 550-570 kg/m3;
• m150 is usually used for bricklaying, cinder block or installation; in rare cases, for concreting, the consumption is 570-590 kg/m3;
• m200 masonry and installation mixture must be prepared 590-620 kg/m3;
• m300 is used for concreting and pouring areas that bear increased load, consumption 620-660 kg/m3;
• m400 for especially strong concrete structures, consumption ranges from 660-710 kg/m3.

When calculating the required materials per 1 m3, it is possible to quite accurately determine the brand and quantity of PCB. They are also interchangeable, if the use of M150 is recommended, the cement can be replaced with M200 and M100 without much damage to the calculations and strength of the structure.

What is the material used for?

The building regulations define the following scope of application:

• sealing cracks and holes in floors and walls;
• the use of sand concrete for screed, including slope-forming screed, is encouraged;
• implementation of masonry;
• pouring concrete, sand-cement bases;
• leveling and filling of floors, including heated floors;
• arrangement of foundations and foundations;
• monolithization of various concrete structures;
• creation of staircase structures;
• construction of elements of the local area, pedestrian paths, etc.

The basic method for calculating the required amount of sand concrete mortar

Professional and private builders are able to calculate how much sand concrete is needed for 1 cubic meter of concrete. After all, such building material is one of the most important components at various stages of repair. The costs of building materials depend on the quality of raw materials. The sand concrete mixture includes the following components:

• a special chemical substance that has high strength and astringent properties - first grade Portland cement;
• sand with a fraction size of no more than 3 millimeters;
• plasticizers, which have the properties of increasing moisture resistance and strength of building materials;
• In order to improve the properties, granite powder is added to the solution.

How many bags of sand concrete are in 1m3? The mixtures are sold in prepackaged packages weighing 25, 40 and 50 kg. This building material is a type of heavy concrete, for this reason the mass of one m3 is approximately 2.4 tons. Using special calculations, when the consumption of sand concrete is 20 kg per 1 square meter, with a layer thickness of 1 cm, then the quantity is calculated using the following formula:

• the volume of a forty kilogram bag is divided by 20 kg, resulting in 2 cm. In order to process 100 cm/2 cm of area, 50 bags will be needed;
• if the volume is 50 kg, then in order to treat an area of ​​1 m2 you will need 40 packages.

Before determining the required amount of sand concrete per 1 m3 of solution, it is recommended to take into account the condition of the surface layer, the required mixture proportions and the thickness of the coating.

It is recommended to determine this using the following parameters: 1 m3 of sand concrete has a weight of 2400 kg, which must be divided by the package weight of 40 kilograms. The total is:

• 0.010 cubic meters in a 25 kg sand concrete bag;
• 0.017 cubic meters in a 40 kg sand concrete bag;
• 0.021 m3 per 50 kg package.

What is sand concrete m 300

Sand concrete m 300 can easily be called one of the most popular, widely in demand and effective mixtures today. This is a fairly new type of building mixture, although it is already attracting increased interest due to its versatility and excellent characteristics. It is successfully used in a wide variety of construction and finishing works, as well as at almost all its stages. This is a modern self-leveling mixture, it hardens quickly thanks to the components of which it consists, in particular, cement and some additives, and has a gray color. This material has a number of significant advantages compared to many similar mixtures.

1. One of the main advantages of this sand concrete is its high strength and reliability, long service life.
2. The material can withstand the highest loads and is not afraid of mechanical and other damage.
3. Has high density.
4. Sand concrete is resistant to precipitation and high humidity.
5. Excellent resistance to corrosion.
6. It has excellent resistance to high temperatures, as well as temperature changes.
7. Significantly reduces the load on the soil and structures.
8. Sand concrete m 300 is a universal material that can be used for both internal and external work.
9. The material is very easy to use, saving time and costs.
10. Allows you to create a perfectly flat surface.
11. It has a fairly low price, which makes it accessible to almost all buyers.

Advantages of the M300 brand

Sand concrete M300 has earned its popularity due to its high versatility. It is very convenient when one material is suitable for different purposes. The main features of this brand are as follows:

• quite high strength;
• sufficient density;
• Possibility of application for external and internal work;
• high resistance to mechanical wear and shock loads;
• ease of use;
• long service life of products;
• rapid hardening of the solution;
• resistance to sudden changes in weather conditions;
• corrosion resistance;
• acceptable price.

At home, the simplest version of M300 sand concrete can be obtained by mixing one bucket of sand and 3.5 kg of M500 Portland cement. To obtain the finished solution, this amount of mixture will require 2.3 liters of water. It is advisable to use river sand. If you don’t have one, you can take a quarry one, but previously washed to remove soil and clay inclusions.

Material cost

Sand concrete m 300 has a fairly reasonable price and is suitable for every buyer. You can buy this material in almost every construction supermarket or small store, but it is very important to purchase a high-quality product from a trusted company. In addition, you need to know some facts, for example, on what criteria the cost of sand concrete m 300 depends.

• First of all, it depends on the quality and type of material.
• Depending on the brand of sand concrete composition, the higher the brand, the correspondingly higher the price.
• From the weight of the packaging bag, since there are several standard packages of this mixture.
• An important role and brand of the manufacturer.

The average price of a 40 kg bag of sand concrete m 300 ranges from 100-120 rubles. Sand concrete Stone Flower m 300 is considered one of the most inexpensive and frequently used mixtures. This is a high-quality mixture that is practically in no way inferior to its more expensive counterpart and has an excellent quality-price ratio. There is a great opportunity to buy sand concrete with delivery; many manufacturers offer this service to their customers. This is still a convenient and profitable option.

By choosing sand concrete m 300 as a building material, you will get an excellent result and unsurpassed quality of work. And the excellent characteristics of this building mixture allow you to achieve the expected results with minimal expenditure of time and money.

How to make a solution

So, we have found out how much material such as sand concrete M300 will be needed to fill the foundation or screed. Its consumption is quite high, but in general, the use of this material in private housing construction seems appropriate. Of course, when using this material, you must knead it correctly. It is best to perform this operation in the following sequence:

• Warm water (from +15 to +25 g) is poured into a container of the required volume. The consumption, depending on the purpose of the solution, should be 0.18-0.23 liters per kilogram of sand concrete.
• Next, the dry mixture itself is poured into the water.
• The resulting mass is thoroughly mixed until all, even the smallest, lumps disappear. The finished mixture must be absolutely homogeneous.

The solution should be used within 2 hours. It is allowed to work with M300 sand concrete at temperatures from +5 to +35 degrees. Water cannot be added to a ready-made solution. During the pouring process, it is recommended to periodically pierce the mixture with a stake, rod or shovel to remove air bubbles. The drying time of the finished mixture is one day. You will be able to walk on the screed in a week. The formwork is removed from the foundation on the second day. Sand concrete gains its final strength after 28 days, that is, like ordinary concrete. Reinforcement is required when the screed thickness is more than 2 cm. Of course, the frame will need to be installed when pouring the foundation. Crushed stone is not added to the mixture when used. Its role is played by large sand particles (3-7 mm). Waterproofing is carried out as usual.

From all of the above, a simple conclusion can be drawn. Sand concrete foundations and screeds are more expensive than cement-sand ones. Therefore, it is advisable to use this material when resistance to cracking of the finished structure is required or its final price does not play a very important role. Sand concrete, for example, is an excellent option when constructing walls from not very strong aerated concrete and foam concrete blocks.

Application for foundation

If low-rise construction is underway or it is impossible to make/order heavy concrete, sand concrete can be a successful alternative solution. For the construction of foundations, a mixture with increased characteristics of strength, density and frost resistance is used. To carry out the work, it is advisable to use a material not lower than M300.

The finished solution is suitable for arrangement:

• monolithic strip foundations;
• prefabricated and block structures;
• prefabricated monolithic (mixed) bases.

If Portland cement is not readily available, you can purchase simple cement, but then its consumption will increase by one and a half times, which will increase the cost of work

The working mixture can be used both as a base material and as a binding material (filling cracks, performing dressing elements, etc.). Practical experience shows that there is a slight deterioration in the bearing capacity of the foundation. If the fill is compacted, the occurrence of defects is minimized.

When arranging the foundations, it is better to know that pouring 1 m³ of solution will require about 750 kg of dry mixture. Sand concrete is packaged in bags from 20 to 100 kg, which will simplify the purchase of the material.

Structural repair of surfaces

EMACO, used for structural repairs, has high adhesion and no shrinkage. In addition, the solution works in close contact with the restored structure.

Characteristics of EMAKO structural compositions

EMAKO S66–S88 (self-leveling) and S88C (thixotropic type) are made on the basis of Portland cement, quartz sand, modifying master alloys and polymer fiber. Reinforcing the composition with fiber helps prevent the occurrence of shrinkage cracks, and Portland cement provides high-quality adhesion to the structure being repaired (see photo).

EMACO SFR

Compositions - SFR, S150CFR (self-leveling type) and S170CFR (thixotropic), are produced with flexible metal fiber and are used for repairing stressed concrete structures with damaged reinforcement.

Thanks to nanotechnology, the following brands appeared in the Emako product range: Nanocrete R3, R4, R4 Fluid. These are fast-hardening unique compositions that allow the application of a repair coating of great thickness on ceiling and vertical surfaces.

Selecting the required composition

Use of sand concrete m 300

Due to the versatility and practicality of the material, it is widely used in almost all areas of construction. It is excellent for both internal and external construction work. An ideal option for the construction of durable structures and concrete products. Sand concrete is necessary for the construction of utility, domestic and residential premises, as well as large construction complexes. Very often, this building mixture is used for screeding floors, pouring foundations, and during installation work. This material is well suited for sealing various seams and for leveling horizontal and vertical surfaces.

Sand concrete m 300 is indispensable for emergency work, where fast hardening speed and good resistance to external factors are required. In addition, this mixture is also used for restoration work, for laying garden paths and staircases. Often used for making borders, various types of paving slabs and much more. In some cases, it is used as the main solution for preparing expanded clay concrete; this occurs by adding expanded clay to the sand concrete mixture.

In order to get an excellent result, before using sand concrete m 300, it is necessary to prepare the surface on which the material will be applied. The base must be thoroughly cleaned of dust, dirt and paint coatings, and crumbling surfaces must also be removed. Large cracks and seams must be repaired. Then it is best to moisten the surface or prime it.