Foam Concrete Annulus Infills

Foam concrete is an ideal substance for annulus infills in sewers.

An annulus is the void between an existing pipe and a new pipe, when a sewer needs repairing or upgrading most water authorities prefer to keep the existing sewer and insert a pipe inside to act as the new sewer, the void left between the two pipes becomes the annulus void.

Annulus Infills

Foam concrete has been used for many years to infill this type of void. Foam concrete is flowable, self levelling, self compacting and can be pumped over long distance, foam concrete is the perfect product for annulus infills, ensuring the entire annulus void is completely full.