Features and properties of concrete brand M300

The M300 brand of concrete is a common and adaptable building material. The M300 concrete is widely preferred for use in building foundations, driveways, sidewalks, and other structural components due to its exceptional strength-to-cost ratio. It is a well-liked option for both residential and commercial projects due to its dependable performance.

The high compressive strength of M300 concrete—typically around 300 kg/cm²—is one of its primary characteristics. Because of its strength, it can withstand a variety of environmental stresses and support heavy loads. M300 concrete also has good workability, which enables it to be easily mixed, poured, and shaped to fit the particular requirements of a project.

The durability of M300 concrete is another crucial feature. In regions with large temperature swings, its resistance to cracking and damage from freeze-thaw cycles is essential. Because of its durability, M300-built structures last longer, require less maintenance, and have long-term stability.

To get the best results when working with M300 concrete, mixing and curing the concrete properly are crucial. Typically, the mix consists of precisely measured amounts of cement, sand, gravel, and water. For the concrete to fully set and become durable, it needs to be kept damp and given enough time to cure.

In general, M300 concrete is a dependable and effective option for a variety of building uses. Because of its strength, workability, and durability, it is a building industry mainstay that guarantees strong, safe structures for many years to come.

General information about concrete

The building composition known as Concrete M300 (class B22.5) is composed of cement, water, different additives, and fine, fractional, and coarse fillers. If we are discussing factory concrete, the material’s passport and certificate of conformity to GOST always contain information about the precise measurements, qualities, and traits of the material. Because of its high density, concrete (M300) can support heavy loads and is a robust material.

Designation and decoding

Like other types of concrete, concrete M300 has a standard marking system. The given value is regarded as a gauge of the maximum pressure that will be experienced when the material is compressed. As a result, the M300’s strength is 300 kgf/kV. cm. This indicator is tested in a lab setting by exerting force on frozen material planes that have been cast into a 15-cm-side cube shape.

Every concrete brand is equal in terms of strength to its class. The latter is crucial for organizing and carrying out the final structure’s parameter calculations, which will have an impact on the maximum load. Class B22.5, which is equivalent to concrete M300, has a possible compression strength of 22.5 MPa under the letter B.

The coefficient of variability (KV) is used to compare the brand and concrete class; for M300, this is equal to 13.5%. The coefficient establishes the quality of each component in the mixture and represents the consistency of the concrete’s composition. In the end, this metric clearly demonstrates the concrete brand’s degree of dependability.

Characteristics and properties of the material

Within 4 weeks of being laid, concrete M300 gains 95–98% of its strength; however, it takes 6 months for all of its technical indicators to match the declared values.

Crucial! Since it controls all other concrete stone properties and is subject to variation based on the quality of the initial raw materials and the accuracy of the proportions, the strength indicator is regarded as the primary one.

The following are additional characteristics and technical details of the material:

  • Density-1.85-2.5 t/1 m3;
  • Resistance to negative factors: frost, heat, sharp temperature differences;
  • suitability for all climatic zones;
  • low thermal conductivity;
  • fire resistance – the material does not melt and does not burn;
  • environmental friendliness, security for humans;
  • the possibility of further improvement of properties by introducing additives and plasticizers.

Other indicators

Other significant qualities of any concrete are crucial for the design of construction facilities.

A mass of concrete

Standards state that the M300 brand concrete cube weighs between 1800 and 2500 kg. The addition of various fillers to the mixture’s composition, which has a direct impact on the mixture’s mass and density, is the cause of a significant scatter (at 700 kg).

For instance, the weight will be at least 2300–2500 kg when using high-density rocks like granite or graniorite. This will lead to the creation of heavy concrete that has exceptional resistance to moisture and frost.

The mass of the solution will be 1800–1900 kg per cubic meter if it is made on limestone. Due to an excessive number of air voids, the material is deemed defective at lower weights.

Frost resistance

The number of freezing and defrosting cycles that concrete M300 can withstand without losing its strength is approximately 150. When plasticizers are included, the number rises to 200.

The benefits of frost resistance include:

  • removal of air voids, vibrational seal of concrete using presses or vibrators;
  • the introduction of special frost -resistant additives;
  • replacing the lime filler granite, refusal to use expanded clay.

Litera F reflects the frost resistance indicator, which can be interpreted as Frost Resistance (F150-F200).

Water resistance

The material’s moisture resistance is denoted by the letter W, which stands for "Water Resistant." It represents the water pressure in MPa when it passes through 0.15 meters of concrete. The indicator for this brand is W5-W6, which is a reasonably high parameter.

The material does not miss the liquid at all when the water pressure is between 5 and 6 atmospheres (0.5 and 0.6 MPa). The indicator can be raised even further by adding specific hydrophobic additives to the mixture. Compaction of the solution thoroughly can produce an effect similar to this one.


The letter "P" stands for the composition’s degree of mobility, which influences how easy it is to fill structures. Mobility in a brand-name M300 solution is equivalent to P1–P5, and it is directly influenced by the water norm and the addition of plasticizers. When utilizing pumping equipment for pouring, mobility needs to be at least P4-5.

The M300 brand of concrete is a popular and adaptable building material that is well-known for its strength and resilience. It’s perfect for building pavements, foundations, and other structural components that need strong support. M300 is appropriate for a range of construction projects because of its balanced combination of cement, sand, and gravel, which provides outstanding resistance to mechanical stress and weathering. A project’s longevity can be increased by knowing the characteristics and features of M300 concrete, whether you’re building a road, a bridge, or a home.

Application in construction

M300 concrete is used in a variety of construction applications. Both the construction of industrial buildings and structures and the construction of private homes benefit greatly from it. It is used to make individual parts of cottages, houses, sheds, garages, warehouses, and household blocks.

Crucial! All kinds of walls, partitions, ceilings, stairs, fences, and blindsers can be constructed with this material.

Additionally, they create from it:

  • roads, sites;
  • borders, paving slabs;
  • wall panels and blocks;
  • reinforced concrete structures;
  • piles and pillars;
  • screed;
  • warm floor;
  • plaster;
  • sewer pipes.

Raw materials and fillers

Water, target additives, and fillers of various fractions are added to the solution during manufacturing.

Coarsely -frauding fillers – gravel and gravel

A large fraction of crushed stone is used to knead the solution; a multi-size filler works best because it minimizes the number of voids. Frozen concrete stone may crack if you use only tiny crushed stone. Granite is thought to be the best choice, but the final product will cost more.

The following are suggestions for the filler’s size:

  • for the construction of roads, bridges-5-20 mm;
  • for industrial buildings – up to 40 mm;
  • for overall structures-40-70 mm.

5–10 mm crushed stone is regarded as small, 10–40 mm as medium, and 40–70 mm as large. A large aggregate is utilized in order to make the solution mobile. Concrete’s norm can be raised by 10% of the suggested amount if granite is added in place of regular gravel.

Features of the choice of crushed stone

It is preferable to utilize gravel rather than gravel in order to produce a high-quality concrete monolith. The primary distinction between them is that crushed stone has uneven surfaces and sharp faces, which enable you to increase cement adhesion.

Take the filler’s purity into consideration when making your selection. It is preferable to purchase mountain crushed stone if at all possible, as it is far more durable than gravel.

Small -fractional filler – sand

Sand used to make concrete needs to be pure, free of silt, clay, and other contaminants. In extreme circumstances, the latter ought to stay within 3%. It is advised to use small sand, with particles up to 5 mm making up no more than 5% of the total. River sand is a better choice in terms of type, though you can also buy a career.


In the process of making concrete, M300, M400, or M500 cement is utilized. The M300 brand cement shouldn’t be used because the finished product won’t be any stronger than the binder itself.

Crucial! The only composition that is fit for use is one that has the proper expiration date.


The concrete fluid needs to be pure and free of chemicals, oils, and oil permits. While regular tap water is also utilized, deep well water is preferred.

Usually given at a ratio of up to 40–70% of the liquid to the cement. This standard is close to 40% for the production of dense concrete and up to 70% for foundations.


To enhance the composition’s qualities, additives and other elements are added. For instance, plasticizers are added to increase mobility, speed up gravity and curing (calcium chloride), and increase frost resistance (sodium nitrite).

Making concrete with your own hands

Skilled artisans frequently purchase ready-made concrete directly from the producer. These products exactly match the attributes and qualities listed in the passport.

You can use your hands to create a solution that fits the following proportions to fill a small structure:

  • cement-300-350 kg;
  • sand – 650 kg (at a density of about 140 kg/m³);
  • crushed stone – 1300 kg;
  • Water – 180 l.

These standards are appropriate for the production of M300 standard concrete. A large filler is not added when making a special cast solution, which is required to align horizontal bases prior to laying flooring.

Work tools

It is best to prepare a concrete mixer with a suitable volume for the task—either 150–250 liters or 60–120 liters. A container, a shovel, and a construction mixer are needed for manual kneading. To measure the components, calipers or measuring containers are required.

Feature Description
Strength Can withstand up to 300 kg per cm²
Usage Ideal for foundations, driveways, and floors
Composition Made from cement, sand, and gravel
Durability Highly durable and long-lasting
Water Resistance Good resistance to water and moisture

The M300 concrete brand is a notable option for a range of construction projects due to its versatility and dependability. It’s perfect for floor slabs, pavements, and foundations because of its well-balanced strength and workability. With a 300 kg/cm² compressive strength, it offers the sturdiness required for both commercial and residential uses.

This kind of concrete is renowned for its dependability and user-friendliness. To create a material that can withstand heavy loads and environmental stresses, a mixture of cement, sand, crushed stone, and water is usually used. Because of its moderate setting time, construction sites can work more efficiently and have less downtime.

The ability of M300 concrete to withstand weathering and erosion is one of its main benefits. It works well in a range of climates, which makes it appropriate for outdoor structures that are exposed to the elements. Furthermore, the strength and durability of M300 concrete are further improved by its compatibility with reinforcement materials, guaranteeing the durability of structures constructed with it over time.

M300 concrete is a wise option for projects that need to strike a balance between high performance and cost effectiveness. Its qualities enable a broad range of applications, from daily residential building requirements to heavy-duty industrial floors. Builders can guarantee the success and longevity of their constructions by making informed decisions based on their understanding of its features and benefits.

Video on the topic

Experiments with sand concrete M300

Concrete. Brand and Class of Concrete. With your own hands. Proper concrete according to the standards.

Concrete M300 m200. Proportions and sequence of filling

My method and proportion of concrete kneads with your own hands M300 brand

M300 or M500? Which brand of concrete to choose? #shorts

Mark and concrete class – what is the difference? | School of concrete

The difference between concrete of the brand M200 (250) and M300 (350)

What color, in your opinion, is able to make a person happier?
Share to friends
Alice Chernyshev

Artist with 15 years of experience, color solutions specialist in interior design. I am in love with the world of colors from childhood, I am happy to share my knowledge and experience.

Rate author
Add a comment