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Australia
Overview
Engineered Fill
Improving ground conditions in areas with soft, compressible, or liquefiable soils.
Our engineered lightweight cellular concrete controls the static settlement of new structures by minimising the weight on the underlying soils and replacing it with an engineered fill material of consistent strength and stiffness.
Terefil® is a Mainmark technology to create a lightweight foamed or cellular concrete.
Terefil is a Mainmark technology to create a lightweight foamed or cellular concrete. Foamed concrete has found extensive use in construction and civil engineering applications due to being lightweight while still retaining good compressive strength.
Terefil is created when a foaming agent is added to a cementitious slurry, forming a large number of air bubbles within the mixture. These air voids give foamed concrete its characteristic low density. This makes it much lighter than traditional concrete, and its highly fluid nature makes it easy to uniformly fill areas around pipes and other obstacles.
Terefil® light-weight raft
Terefil can be used in the replacement method, one of the principle methods to improve the ground’s seismic performance and resistance to liquefaction. In this ground improvement application, Terefil is used to create a lightweight raft prior to building construction. Weak, compressible or liquefiable soils are excavated to a designed depth and replaced with foamed concrete. This reduces the weight on the underlying soils and provides an engineered fill material with consistent strength and stiffness properties. The replacement method can be applied to both sands and silts.
The soil replacement method involves the removal of the insitu liquefiable soil, and replacement with a non-liquefiable material. It is useful for treatment of shallow liquefiable layers or creating a mat of dense uniform ground to support lightweight structures.
