What it is:

Compaction grouting is a soil mass compaction technique that does not use vibration.

How it works:

The process involves injection of mortar, usually of high viscosity, under pressure and with a controlled flow, that displaces the solid around the drilling tool by compacting it.

Why it’s used:

The equipment is fairly compact and can be used in areas with low headroom, such as under a bridge deck or in an existing basement. The process can target specific soil layers. By drilling through dense materials, it is possible to access and treat weaker lower layers. This technique is also used to fill voids.

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