Concrete b30: properties, application, material cost

The composite material considered in the article consists mainly of inorganic binders. And its physical characteristics depend on the correct concrete mix. The composition of the latter consists mainly of cement (binder), water, various aggregates, special additives and additives.

General information about the material

The main goal is to achieve the specified technical requirements, which include:

• required strength;
• frost resistance;
• water resistant

Concrete M400 B30 refers to heavy types of materials.

Its characteristics correspond to the high class, which allows:

• use the product in the construction of facilities with increased technical requirements;
• build structures that are operated under severe conditions;
• meet the most stringent requirements and standards in the design and construction.

Today, the concrete grade B30 is used much more often than just 5-10 years ago. This is due to increased state control over all stages of the construction process.

In concrete M400 be sure to include high-quality granite rubble. The use of special plasticizers and chemical additives for concrete is also allowed.

Tip: when you purchase this brand of material, be sure to require all the necessary certificates and technical documents on product quality.

Properties

According to GOST-7473, defining "concrete mixes", the proportions of materials in 1 m³ Brand 400 is (in kg):

• cement - 395;
• sand - 870;
• rubble - 1075;
• water - 170;
• plasticizers - 7.4.

Consider the following characteristics of concrete B30:

• class - B 30;
• the density of concrete B30 M400 is 2430 kg / m³;
• waterproof class refers to W6-W12;
• mobility class is P3-P5;
• frost resistance - F100-F300;
• Hardness to solidification - Ж1-Ж4.

To check the consistency of the solution, special tools are used, for example, a cone having a perfectly smooth inner surface.

Its dimensions are:

• height - 300 mm;
• lower width - 200 mm;
• upper width - 100 mm.

Two handles are installed on both sides of the device, and two stops, similar to blades, are attached below.

They stand with their feet and pressed to a horizontal platform in the form:

• plywood sheet;
• wide board;
• become.

The instruction looks like this:

1. The site must be sprinkled with water.
2. Put a cone on it.
3. Press it with your feet.
4. Fill it three times with 100 mm solution of each layer.
5. Pierce 25 times with the rod.
6. Remove excess solution after filling.
7. Take the cone by the handles and gradually raise.

The concrete mixture from the cone will begin to settle, changing shape. After the cessation of subsidence, place a cone near it and measure the distance with a ruler between its upper part and the mass.

Remember, the thinner the solution, the greater will be its sediment.

Approximately the distances are:

• hard - up to 20 mm;
• plastic - 60-140 mm;
• cast - 170-220 mm.

The class of concrete B30 is not used in individual construction for the following reasons:

• the strength of concrete B30 significantly exceeds the technology;
• a short setting period hinders construction and makes it very difficult to deliver to remote areas from the place of manufacture;
• a low level of professionalism of builders who simply do not have time to lay it down, with the result that a strong concrete block will be on the site;
• the high price of the solution due to the high content of cement in it, which is not necessary in household construction.

Tip: if you need to disassemble a variety of concrete structures, you will be able to cut reinforced concrete with diamond circles using professional equipment.

Application

The most common characteristics of the class of concrete B30 makes it possible to use it:

• during the construction of large bridges and viaducts, designed for significant stresses and intended for operation in conditions of heavy traffic;
• for the construction of railway bridges that can withstand heavily loaded wagons;
• in the manufacture of bank vaults, as well as special structures (bowls, columns, arches, beams, beams);
• for landings, borders, marches;
• at the device of difficult hydraulic engineering constructions, including, dams, pools and locks for different industries;
• for the manufacture of collectors of different diameters for the creation of backbone communications networks;
• in the construction of special facilities related to energy, engineering and mining industry.

In addition, this version of the building material is used actively in the production of:

• floor slabs;
• paving slabs;
• sewer wells;
• to create the top layer of the roadway with increased load;
• in the construction of facilities experiencing a strong vibration impact from nearby tunnels, railways, major highways and subway routes.

Cost of material

A huge list of advantages of the material affects the formation of its value, it is located in the range of $ 130-140 per cubic meter. meter. This building material is referred to the middle class in terms of efficiency, and is offered as an already prepared solution with a mobility of 3-5 points.

You can purchase it:

• in any building supermarket;
• at the plant of concrete products;
• specialized production points.

Tip: Strong recommendation - contact only trusted and reliable suppliers, because it is not possible to determine visually the brand of concrete.

Be aware that making your own B30 quality concrete with your own hands requires strict adherence to technology, as well as adherence to general recommendations on proportions and recipes. Therefore, before this process, give yourself the answer, do you have such an opportunity or not, so as not to waste money, time and energy.

Tip: if necessary, laying through the foundation of communications, use diamond drilling holes in concrete, which will significantly save time.

Conclusion

From the article it became known which brand of B30 concrete class is M400, which shows its strength. Because of this characteristic and other material properties, it is not used in individual construction, but is used more for objects that need particularly strong concrete structures.

To make it yourself is possible only with compliance with technical documentation, but it is unprofitable. The video in this article will help you find additional information on this topic.