ЦПС М300: properties and technology of preparation of a building compound

Concrete is the main building material,which is used throughout the private and industrial construction. A reliable and durable material produced from a mixture of sand and cement (quite often it also accrue gravel or crushed stone). Depending on the technology of preparation of the solution and the ratio of its components, the physical and chemical properties of concrete will also change. Most often for its mixing, the M300 is used.

Classification

All cement-sand mixtures differ in their properties. On this basis, they can be used for various construction needs. Today, the following brands are distinguished:

M100 - plaster mixes, which additionally includes lime.
M150 - the most low-strength "thin" compounds, which are used only for masonry work, plastering and when restoring the fundamental foundations of ancient buildings.
M200 - the optimal composition, if we talk about its price and quality. Such solutions are used in the construction of walls and in the manufacture of cellular concrete.
M300 - this is the most durable composition, which is designed for a variety of types of work. Very often it is used for concreting.

Application area

Dry mixture is used for a wide variety oftypes of construction works. Most often, the M300 MTC are used in the construction of facilities that are not subject to serious operational requirements. Thus, the solution can be used for both internal and external works. Most often, dry screeds are made from it. In this case, the cost of the concrete base will be lower, and in its properties the plate will meet all the requirements. Also mixtures are used for sealing cracks in concrete, leveling various surfaces, etc.

DSP M300: Specifications

Cement-sand mixtures of this brand have the following properties:

Frost resistance. This parameter indicates how many times the frozen concrete structure can be defrosted and frozen without a pronounced decrease in strength and other characteristics. The M300 CCD can withstand up to 50 cycles, respectively, it can be used in the construction of unheated rooms (for example, garages).
Compressive strength. This parameter determines how strong the finished concrete structure will be when pressure is applied to it. Cement-sand mixture M300 is capable of withstanding loads up to 30 MPa or 9.81 kg / cm².
Temperature regime. There are special recommendations regarding the conditions under which concrete mortar can be laid. If it is a question of MPS 300, then it is recommended to implement it at a temperature of +5 to +25 degrees. If the air temperature is lower, then it will be necessary to take care of additional heating of the solution.
Adhesion. In simple terms, this parameter indicates how well the mixture will mesh with the base base. For a solution of grade M300, this value is 4 kg / cm². This means that the solution will adhere well to almost any surface.

Granularity of sand for mixture

When preparing a dry screed or otherConcrete structure takes into account such an indicator as the fraction of sand. Depending on the size of the granules of this material, the DSP can be used for various purposes:

Less than 2 mm is fine sand. Such raw materials are used in the preparation of mixtures for sealing cracks, seams and chips in concrete bases.
From 2 to 2.2 mm is the medium fractional sand. This material is applicable for the arrangement of screeds, the laying of paving slabs, curbs and much more.
More than 2.2 mm is coarse-grained sand. Such raw materials are suitable for the construction of more serious structures (foundations and other bases).

Consumption

CTC M300 is considered a fairly economical composition. However, everything depends on the thickness of the concrete to be laid. If the height of the base is 1 mm, then by 1 m² It will take about 1.7 kg of the finished dry mixture. With a thicker layer of concrete (about 2 mm), the consumption will increase to 3.5 kg. If the thickness of the screed is 10 mm, then you need to purchase at least 22 kg of dry composition.

Consider the example. Suppose you need to fill the screed area of 20 m². In this case, it will take about 460 kg of DSPM300, the price of which will be 3000 rubles. Of course, you can significantly save money if you prepare the mixture yourself on the construction site. However, it is much more convenient and easier to work with ready-made dry solutions.

Preparation

When making a solution, it is necessary to take into account the proportions of the components used.

Also into account it is necessary to take the type of construction under construction:

For screed, you will need 1 part Portland cement brand not lower than M400 and 3 parts sand. To ensure that the substrate is more durable, it is recommended to add fiber reinforcement or reinforcement.
For the preparation of mortar for plastering the proportion will be 3: 2 (sand, cement). It is worth considering that such a solution must be worked out as quickly as possible. Otherwise, it will dry up quickly.

Some novice builders believe that forself-preparation of the solution is enough to mix all the components with water. In fact, first of all, it is necessary to combine sand with cement and mix thoroughly until a homogeneous dry mass is obtained. Only then water can be added to the solution. At the next stage it is better to use a concrete mixer and mix everything thoroughly again.

If the solution is made in the wrongsequence, the finished construction will be characterized by low strength characteristics and will collapse quite quickly. Therefore, it is better to produce blends on specialized equipment.