Underwater concrete

Underwater concrete is concrete that is placed under water. To ensure that the concrete does not segregate during concreting, special concreting methods are required, such as the use of stationary hoppers (so-called contractor method). The concrete must have good cohesion and workability. For this purpose, the cement content should be at least 350 kg/m³. Underwater concrete is used in particular for diaphragm walls and in groundwater as a barrier layer for floor slabs.