kevytsorabetonit

Kevytsorabetonit, often translated as lightweight aggregate concrete, are a type of concrete that uses expanded clay, shale, or slate as the aggregate instead of traditional crushed stone or gravel. This substitution significantly reduces the overall density of the concrete compared to normal-weight concrete. The expanded nature of the aggregate, which involves heating the raw materials to a high temperature causing them to expand and form a porous structure, is key to its lighter weight and insulating properties.

The properties of kevytsorabetonit make them suitable for various construction applications. Their reduced weight lessens the load on supporting structures, which can lead to cost savings in foundations and structural elements. This characteristic is particularly advantageous in multi-story buildings or in situations where ground conditions are poor. Furthermore, the porous nature of the lightweight aggregate contributes to improved thermal insulation, helping to reduce energy consumption for heating and cooling. They also offer good fire resistance.

However, kevytsorabetonit may have lower compressive strength compared to normal-weight concrete, depending on the specific mix design and aggregate type. This means they are not always suitable for heavily loaded structural components that require very high strength. Despite this, they are widely used in non-load-bearing walls, floor and roof screeds, precast elements, and as insulation fill. The production process of the expanded aggregate is also more energy-intensive than that of conventional aggregates.