What it is
The Cofra Roller Compaction (CRC) method, also referred to as High Energy Impact Compaction (HEIC), is a technique that densifies loose granular materials up to a depth of 2 to 3 meters below the surface by pulling a non-circular roller over the surface of an area.
How it works
The compaction of the underground is initiated by vibrations, which lead to the rearrangement of the particles. These vibrations are generated from the impact of a weight onto the surface. The CRC method is in essence a light form of dynamic compaction in which densification is achieved by lifting and dropping a weight from a specified height. The shape of the non-circular drums of the CRC equipment cause in this case the lifting and dropping motion of the drum weight as the equipment travels over the site.