Infra-lightweight concrete – Potentials for the precast industry

I.) Concrete properties and production

The idea of expanding the range of lightweight concretes to include lower bulk densities in order to offer interesting thermal solutions has already been successfully implemented in practice by working groups in Munich and Berlin [1-3]. Both approaches differ primarily in the choice of the lightweight aggregate used. Whereas a combination of expanded clay and expanded glass is used for the lightweight concrete of Callsen/Thienel [1], Schlaich et al. [2, 3] used only expanded clay aggregate. There are also other approaches, such as [4], that use only expanded glass as a lightweight aggregate.

This paper refers to specific examples to explain how the various types of infra-lightweight concrete differ in their properties. In addition to the achieved strength values, these differences primarily pertain to processing properties. In this respect, the role that the number of recipe components plays must not be underestimated since it often appears to be a limiting factor for precast plants. The above aspects then determine the requirements that potential producers of infra-lightweight concretes must meet, as well as the opportunities infra-lightweight concretes provide for the production of prefabricated elements.

Related articles:

Issue 2018-02 Infra-lightweight concrete – Potentials for the precast industry

II.) Material-appropriate designing and building

Infra-lightweight concrete is of such lightweight and thus thermal insulating, so that this concrete enables the construction of architectural concrete buildings which meet today’s structural...

Issue 2020-02 Infra-lightweight concrete defined as lightweight-aggregate concrete with open structure

Standardized use from precast to cast-in-place applications

Infra-lightweight concrete (ILC) originally represented an evolutionary stage of structural lightweight concrete (LC) in accordance with DIN EN 206 and DIN EN 1992. This new type of concrete had a...


Infra-lightweight concrete from research to practical application

There is a lot of hype around infra-lightweight concrete. Architects wish for monolithic construction methods using exposed concrete, with being sustainable and authentic. The "concrete oasis" youth...


Single-family house in 50-cm-thick infra-lightweight concrete

Lightweight concrete structures gain more and more attention and receive awards, like the recent Concrete Architecture Prize for a refined residence in Swabian and a notable concert hall in the...

Issue 2014-02 An experimental building

Monolithic external architectural lightweight concrete components providing highly efficient thermal insulation –

Combining the physical characteristics of lightweight concrete that provides highly efficient heat insulation with the appearance of a state-of-the-art architectural concrete makes it possible to...