When a fill structure is placed and compacted on a landscape, it generates additional loads, which are particularly significant in areas with soft soil subgrades. The load magnitude depends on the fill material’s density and thickness. These additional loads often lead to long-term settlement of the embankment or structure. The extent of settlement is proportional to the softness of the soil, with outcomes ranging from significant total settlement to unacceptably high differential settlement or structural tilting.

Using Leca LWA as a fill material in landscaping can substantially reduce the additional loads exerted on the subgrade, thereby minimizing long-term settlements. Differential settlements caused by varying loads or soil conditions can also be mitigated by employing a lightweight transitional structure.

In areas with high groundwater or surface water levels, it is also beneficial to partially reduce the fill structure’s weight to alleviate pressure on the surrounding environment. This approach accounts for buoyancy effects, particularly in structures near water bodies or flood-prone areas, ensuring stability even during rising water levels.