Necessary consumption of material for a semi-dry floor screed. Consumption of finishing materials Consumption rates of finishing materials per 1 m2

In the course of the repair work definition the right amount plasters associated with the rates of its consumption, which directly depends on the thickness of the layer applied to the bearing surface, specifications mixture and area covered by the material.

Factors affecting the consumption of plaster

There are two main classifications, which render greatest influence on the amount of material used.

When making calculations, the following is taken into account:

• wall curvature;
• type of plaster mix.

Method of calculation for different types of mixtures

Consumption rates depend not only on the manufacturer and brand of material, but also on its type and texture. When making calculations, it is recommended to focus on their features, including.

Decorative plaster "Bark beetle" for walls:

Here the calculation method is different, different from other types. The value will depend not only on the thickness of the layer, but also filler sizes. It is not entirely accurate - the resulting number is needed multiply by 5-10%, to get the right amount:

• for a fraction of 1 mm - 2.4-3 kg / m2;
• fractions 2 mm - 5-6 kg / m2;
• fractions 3 mm - 7-9 kg / m2.

Thickness working surface it will from 10 mm to 30 mm.

Cement plaster for the facade texture "bark beetle":

Plaster mortar on cement base bark beetle texture is used as a finishing layer when finishing part of the building. She earned her recognition thanks to good quality indicators - strength and moisture resistance, and economical cost.

To cover 1 m2 of the working surface with the “bark beetle” texture, 3 kg of the mixture is required with a layer thickness of 1 cm. If it is necessary to make a calculation for a larger value, multiply 3 kg by the layer thickness in mm and get the desired numeric value.

Gypsum plaster "Rotband":

Application and consumption gypsum plaster.

The consumption of dry plaster mixture with gypsum binder "Rotband" is determined by the manufacturers and indicated on the packaging with the material.

For application manually you will need 8.5 kg of gypsum plaster per 1 m2 of surface with a thickness of 10 mm. If the layer thickness is more multiply it in mm by 8.5 kg and get the required value.

Venetian plaster mix:

It is rarely used, but it looks beautiful due to the marble texture. Consumption per 1 m2 will depend on the thickness of the layer:

• for 1 cm - 70 g;
• for 2 cm - 140 g;
• for 3 cm - 210 g.

Skills correct material calculation- your ability to spend it economically save your time and money.

Answer: The cost of construction wall materials, providing standard indicators of the wall structure in terms of thermal conductivity and in terms of heat transfer resistance coefficient, can be calculated based on the cost and consumption of a particular material. Depending on the choice of a particular material, the cost square meter wall structure can fluctuate in one direction or another within 10-30%. Therefore, it is possible to talk about the exact figures for the cost per square meter of a wall only with reference to a specific material that has its own average cost. So, for example, the price of a plaster mixture can be almost twice as different.

Tab. Calculation of the cost and consumption of building materials per 1 m 2 of the wall

This page presents reference Information about expense the most popular finishing materials . Taken as a basis reference manufacturer's recommendations - depending on the condition of the bases for finishing, their values ​​\u200b\u200bmay deviate. The table is updated as new mixtures and other components used in the decoration of apartments, dachas, cottages and country houses. We have also updated this section. instructions on their application.

Unless otherwise stated, the application rate applies to the area 1 sq. m. In the case of mixtures, the layer thickness for which the relevant standard is prescribed is also indicated.

Material consumption rates for the device false ceiling specified for the complete system P113(according to the Knauf classification).

For calculation, you can also use a special calculator presented on our website.

In square brackets […] the weight of one commodity unit is indicated; in the presence of several types of packaging, preference is given to the most popular in terms of consumer demand.

We will be happy to provide and selection of finishing materials, taking into account the characteristics of the premises, as well as the technologies used.

On a construction site of any level, from a skyscraper to country house, can not do without concrete. This material is used for pouring foundations, building walls in monolithic construction, devices of ceilings and screeds, in laying bricks and other artificial stone. Concrete preparation in correct proportion not only ensures the durability and strength of structures, but also avoids unnecessary costs for materials.

Composition of concrete

In the simplest case, concrete consists of three components:

• Binder.
• Aggregate.
• Water.

The consumption of materials per 1 m3 of concrete is determined by the properties of these materials. As for the production of the mixture, cements of grades M100-M600 are used in terms of strength. When mixed with water, a viscous mass is formed, upon solidification of which fake diamond. As a filler, sand or various are used. This increases strength. frozen solution, since the strength of crushed stone is higher than the strength of cement. In addition, the use of aggregate reduces the shrinkage of the cement mix.

In addition to the main components, the composition of concrete includes various additives that give the solution additional properties: frost resistance, water resistance, color, etc.

The required consumption of materials per 1 m3 of concrete - crushed stone, cement, sand - is determined based on the requirements for the characteristics of the mixture.

Main characteristics of concrete

The most important characteristic of concrete is its compressive strength. Depending on it, a strength class is set. Denoted English letter"B" and numbers corresponding to the strength of the sample in MPa. Concretes of classes from B3.5 to B80 are produced, in civil engineering solutions B15 - B30 are most applicable. In addition to classes, a brand can be used to indicate strength. It is designated by the Latin letter "M" and a number corresponding to the strength in kg / cm2. Classes and brands correlate quite accurately with each other, for example, M200 solution corresponds to class B15, and M300 to class B22.5.

The consumption of materials per 1 m3 of concrete can vary significantly depending on the required class or brand of mortar.

It should be noted that the actual class of concrete is determined only in laboratory conditions on day 28. Therefore, if it is necessary to know exactly the brand of the mixture, then at the stage of its preparation, several samples should be cast - cubes or cylinders 100 mm high. It is also possible to determine the strength of concrete using the instrumental method or the Kashkarov hammer, but these methods are less accurate.

Selecting the required concrete class

The required grade of concrete must be specified in project documentation to the construction site. If the construction is carried out independently, you should decide on the brand of the mixture, as this will decisively affect the strength and cost of the building or structure being built.

The purpose of concrete of the most common grades is given below.

• M100 - used for the installation of footings, the installation of parebriki, small architectural forms;
• M150 - used for arranging paths, sealing fence supports;
• M200 - for the construction of walls, porches;
• M250 - production of monolithic foundations, grillages, foundation slabs, lightly loaded floor slabs, stairs, retaining walls;
• M300 - for any loaded structures: walls, ceilings, foundations;
• M350 - bearing walls, columns, ceilings, beams, monolithic foundations.

Sand parameters

Sand is used to prepare the solution various origins: quarry or river. The second is more preferable, as it has a larger granule size and does not contain impurities. Quarry sand can vary in its granulometric composition. It is preferable to use sand with medium and large granules. Since quarry sand may contain clay or other impurities, it is recommended to sift it.

It is extremely important to pay attention to the moisture content of the sand. Depending on this, the amount of water added to the mixture should be adjusted. Taking into account the humidity and density of bulk sand, it can vary from 1.3 to 1.9 t / m3, this must be taken into account when calculating the consumption of materials per 1 m3 of concrete.

Choice of gravel

Crushed stone in the composition of the concrete mix increases the strength of concrete and reduces its shrinkage during solidification. When choosing gravel highest value have his faction and origin.

In construction, crushed stone fractions are used:

• from 5 to 20 mm;
• from 20 to 40 mm;
• from 40 to 70 mm.

Depending on the raw material, crushed stone is classified into:

• Limestone, based on sedimentary rocks.
• Gravel from rounded rock fragments.
• Granite, obtained by crushing granite and granite-gneiss rocks.

Granite crushed stone has the best strength parameters, so if concrete is being prepared for critical structures - foundations, columns, ceilings, then it is better to use it. We must not forget that the crushed stone used should not contain impurities, especially clay.

Water cement ratio

In the production of concrete, the ratio of cement and water is of paramount importance. Water is needed for chemical reaction hydration of cement, leading to the formation of cement stone. This ratio decisively determines the class of the concrete mixture. It is important to take into account the brand of cement. The lower the water-cement ratio, the stronger the concrete. The minimum ratio required for cement hydration is 0.2. In practice, concretes with a ratio of water to cement of 0.3-0.5 are used. Mixtures with a high water-cement ratio are practically not used.

Determining the proportions of the concrete mixture

As a rule, cements and M500 are used for the preparation of concrete. In practice, the following table is used to determine the consumption of cement per 1 m3 of concrete.

These data are given for conditions with normal temperature and air humidity, as well as for cement, the parameters of which correspond to those indicated on the package. AT real life an excess of cement of 10-15% should be provided.

For example, the consumption of materials per 1 m3 of M200 concrete will be: cement grade M500 - 240 kg, sand - 576 kg, crushed stone - 984 kg, water - 120 l.

Concrete making

At large volumes concrete works it is advisable to buy ready-made concrete at the nearest factory with delivery by a mixer. In conditions industrial production materials per 1 m3 of concrete are kept quite strictly. If this is not possible, you can prepare the required amount of the mixture at home. It is important to correctly assess your capabilities - the concreting of a separate structure must be carried out in one go.

Before mixing the mixture, the consumption of materials per 1 m3 of concrete is determined. It is not necessary to calculate the consumption rate of the components; it is enough to use the table below.

The mixture is prepared in a concrete mixer of the appropriate volume, putting measured portions of dry cement, sifted sand and gravel into it. Water is recommended to be added in portions last.

Additives

In addition to the main components, additives for various purposes are added to the concrete composition:

• Modifiers. Designed to increase the strength and increase the frost resistance of concrete.
• plasticizers. Increase the mobility and water resistance of the mixture.
• Mobility regulators. They allow to extend the setting time, maintain mobility during transportation.
• Antifreeze additives. Provides normal setting of the solution at negative temperatures down to minus 20 degrees.
• Setting accelerators. Increase setting speed providing maximum speed dial strength on the first day.

When using additives, the consumption of materials per 1 m3 of concrete should be determined taking into account the manufacturer's recommendations. Violation of the instructions for use can have quite the opposite effect.

Flow calculation cement screed per 1 m2 is mandatory procedure, which allows you to determine the exact ratio of components, in particular cement. It is the correctness of the obtained indicators that makes it possible to create a basis that is distinguished by reliability and durability. Also, the expense determines the financial costs that will be required to purchase materials.

It must be borne in mind that the calculation of the screed is made taking into account the components included in its composition. The main substances are cement and sand, to which the necessary additives are mixed. The mixture is made by adding water. The resulting ratio depends on the final result.

The purpose of the coating can also affect the consumption of material:

1. Create a surface to be used in technical room. It can be the floor in the back room or garage.
2. fill rough coating thickness from 80 mm. For this purpose, it is best suited concrete mix for floor screed, which includes a large fraction. To obtain lower indicators, it copes with the task and cement-sand mortar, but subject to reinforcement.
3. Finishing option, which serves as the basis for subsequent cladding decorative materials. The coating has a thickness of 5 to 30 mm.

The main thing is to correctly determine the purpose of the surface in order to create a truly reliable design.

Preparation process for flow determination

Before performing the necessary calculations, preparation should be made to help achieve an accurate result:

• Everything superfluous is removed from the room, the base must be completely free. If required, the old coating is removed.
• The surface is assessed for possible damage. In the presence of cracks putty putty is carried out.
• After the initial preparation, the zero level is set. According to the measurements of height differences, the final thickness of the coating is determined. It is this indicator that is one of the main ones in order to calculate the consumption of cement for a screed when pouring per 1m2.

On a note! It should be borne in mind that the values ​​\u200b\u200bof 1 m² when working with a floor screed are not entirely correct, since the surface has a third indicator - thickness. That is why cubic values ​​are initially determined.

Screed calculation technology

Calculation of screed flow starts with the choice optimal composition for work. There are currently two large groups: ready mixes and solutions requiring preparation. The first variety is much preferable as it already has the exact amount necessary components and additives.

Calculation of the finished dry mix

Due to the fact that ready-made dry mix for screed allows you to get a better result, it is becoming increasingly popular. It must be borne in mind that the characteristics of the finished compositions vary, so you should familiarize yourself with the products in advance.

Each package contains information about the consumption of material per 1 m2 with a coating thickness of 1 or 10 mm. To obtain values ​​that depend on the actual thickness, the following actions are performed:

1. Computed total area rooms by multiplying the length and width. With a complex configuration, it is advisable to refer to the plan of the house or apartment.
2. The thickness of the floor is translated into meters, the indicators are multiplied.
3. The resulting value is divided by 0.1.

Calculation example:

The area of ​​the room is 10 m2. The required thickness is 0.05 m.

10*0,05 = 0,5/0,1 = 5.

Approximate consumption finished composition for a 10 mm floor screed - 14.6 kg.

14.6 * 5 \u003d 73 kg of dry matter.

Thus, the total amount of the required composition per 10 m2 with a thickness of 50 mm is 0.5 cubic meters. Water is added based on the conditions that are determined by each manufacturer individually.

Consumption of traditional solution

For calculation required amount composition prepared by hand, you need to do the following:

• The cubic value is determined, for this the area is multiplied by the thickness. For example, 30 m2 * 0.04 m = 1.2 m3.
• The consumption of cement per 1 m2 of screed is calculated at the rate of one part of cement to three parts of sand.
• The total number of parts is 4, which means 0.3 m3.

0.3 is a part of Portland cement for an area of ​​30 m2 with a thickness of 40 mm. Sand accounts for 0.9 m3.

• Based on approximate data, one cubic meter of cement is equal to 1300–1400 kg.

1300 * 0.3 \u003d 390 kg.

• One cubic meter of sand is 1625 kg.

1625 * 0.9 \u003d 1462 kg.

• To obtain a solution, water is added to the dry components, its amount varies from 0.3 to 0.5 liters per 1 kg of cement.

Thus, for 30 m2 with a coverage of 40 mm, 1852 kg of dry mix and about 200 liters of water will be required. Accordingly, 61 kg of composition and 6.5 liters of liquid are needed per 1 m2.