Roller Compacted Concrete:

Roller compacted concretes are used in construction of dams, multiple layer placements for foundations and rapid placement of single layer paving for highways and runways. It is a dry concrete that is no slump that has been consolidated through vibrating rollers. A roller compacted concrete have to be dry enough to support the mass of the vibrating equipment. It must be sufficient wet to allow the mixing and consolidation processes. This concrete can be used for continuous placements without cold joints. To achieve adequate bonding of the roller compacted concrete to hardened concrete at the bottom of the cold joints, segregation must be prevented and a high plasticity bedding mix must be used at the start of placement.