Betonunderlag

Betonunderlag, commonly known as concrete subbase or concrete screed, refers to a layer of concrete used as a foundation or base layer beneath flooring systems, road surfaces, or other structural elements. Its primary purpose is to provide a stable, level, and durable surface that supports the weight of the finished construction while ensuring proper drainage and load distribution.

The composition of Betonunderlag typically includes a mixture of cement, aggregates (such as sand and gravel), water, and sometimes additives like plasticizers or accelerators to enhance workability or strength. The exact proportions depend on the intended use, environmental conditions, and structural requirements. For indoor applications, a thinner layer (often 4–8 cm) may suffice, while outdoor or high-traffic areas may require thicker layers (10 cm or more).

Installation begins with preparing the subgrade, which involves compacting the soil to prevent settling and ensuring proper drainage. A layer of gravel or crushed stone may be laid first to improve stability, followed by reinforcing mesh in some cases to enhance tensile strength. The concrete is then poured, leveled, and allowed to cure, typically over a period of several days. Proper curing is essential to achieve maximum strength and durability.

Betonunderlag is widely used in residential and commercial construction for flooring, driveways, patios, and industrial floors due to its strength, longevity, and resistance to moisture and wear. However, it requires careful planning to account for factors such as thermal expansion, potential cracking, and compatibility with the finished flooring material. Proper installation techniques and adherence to local building codes are critical to ensuring a long-lasting and functional subbase.