Manual replacement of concrete slabs with rapid-hardening concrete:
The rapid-hardening concrete Concretum® Q-FLASH 2/20 is now frequently applied using slipform pavers. However, it can also be poured manually. This is the case, for example, if the concrete slabs being replaced are not directly adjacent to each other, the geometry is challenging, or if complete replacement of a stretch using a slipform paver is not appropriate.
The concrete can be ideally adjusted to the needs at the construction site. Consistency and open time (working time) are variable. As a result, project-specific requirements can be taken into account (transport distances, pouring times, ambient conditions and pouring method). Usually the concrete is compacted at the construction site and spread with the vibrating beam or vibrating roller. Just like when pouring with the slipform paver, a broom finish or exposed-aggregate surface can also be produced when poured manually.
This allows individual slabs to be replaced on motorways and at airports in overnight stages without restricting operations.
In addition, any transport surfaces made from concrete (solid railway basements, bridges, logistics areas, roundabouts, etc.) can be reconstructed manually.
The manual pouring method is characterised above all by its high flexibility and is used, in particular, for follow-up work.