Rough concrete slab production method - applies agent delaying setting directly and dries to form vapour-proof film

摘要

The method produces rough-surfaced concrete slabs, a mixture of covering and basic concrete being poured into a mould, after which an agent delaying setting of the concrete is applied to the surface. The delaying agent is applied directly to the concrete, and is then dried to form a vapour-proof film. Application can be by spray nozzles, rolling or painting, and the casting can be passed by or through a drier. The method produces slabs with a constant depth of roughness.