What is the general strength grade of foam concrete?

The strength grade of foamed concrete can vary according to different classification standards and specific needs. Generally speaking, the strength grade of foamed concrete can be classified from multiple perspectives:

Foamed Concrete

Classification by compressive strength

According to the different compressive strengths, foamed concrete can be divided into multiple grades. Usually, these grades are represented by the letter C followed by a number, such as C0.3, C0.5, C1, C2, etc., up to C20. In this classification method, the larger the number after C, the higher the compressive strength of the foamed concrete. These foamed concretes of different strengths are suitable for different engineering needs, for example:
C0.3 strength foamed concrete is usually used for ultra-light insulation roofs, which are not accessible but have good thermal conductivity.
C0.5, C1 and C2 strength foamed concrete are suitable for generally accessible insulation roofs.
For foamed concrete of strength, C3 to C20, aggregates or heavy aggregates (such as fly ash, sand, etc.) may be added during the cast-in-place construction process and are used for high-strength roofs, highway widening projects, etc.

Classification by other standards

In addition to classification by compressive strength, foam concrete can also be classified according to dry density, water absorption, construction process, etc. For example, when classified by dry density, foam concrete can be divided into 11 grades from A03 to A16; when classified by water absorption, there are 8 grades from W5 to W50; when classified by construction process, it can be divided into two categories: cast-in-place foam concrete (S) and foam concrete products (P).

The strength grade of foam concrete varies according to the classification standard and specific needs. In practical applications, the appropriate strength grade of foam concrete should be selected according to the specific requirements of the project, environmental conditions, cost budget and other factors. At the same time, attention should also be paid to other performance indicators of foam concrete, such as dry density, water absorption, thermal conductivity, etc., to ensure the quality and safety of the project.

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