Structural engineering and bridge building

Liapor backfills are light and stable and also possess moisture-regulating and thermal insulation properties. The self-compacting expanded clay fills, combined with efficient application methods, offer outstanding cost-effectiveness and rapid progress on the building site. Liapor's expanded clay fill is the solution of choice whenever it is necessary to backfill structures. This is because, as a self-compacting filling material, it distributes the forces bearing on it evenly and reduces the earth pressure by a factor of 2 to 3 compared with conventional subsoils. This load reduction is due to the material's low dry bulk density of approximately 325 kg/m³ and the high rigidity of the clay grain with its fine, even pore structure. This gives the Liapor spheres the necessary stability of form, resulting in only a very low level of subsequent compression. Consequently, one cubic metre of Liapor permanently fills a one-cubic-metre cavity.

Thermal insulation combined with moisture regulation

In addition, Liapor backfills are chemically resistant, non-flammable, frostproof and moisture-regulating. This is because the expanded clay can absorb and then release humidity without this causing any settlement or swelling. At the same time, Liapor expanded clay granules also ensure drainage by channelling off any water reliably and thoroughly and thus prevent any humidity damage to the building. Last but not least, an expanded clay backfill also provides effective thermal insulation.

Self-compacting for greater cost-effectiveness

Whether the backfill is used for buildings or bridge abutments: As a compression-resistant and non-deformable material, Liapor fills in the typical grain sizes of 4 - 16 mm or 2 – 10 mm ensure optimum stability even for demanding substrates. They also make excellent backfills for buildings or excavated sites, in part due to their economic benefits. This is because the granules can be delivered quickly and easily by silo wagon directly to the infill site where the self-compacting material achieves its optimum poured density by itself – without any additional agitators or compacting equipment.