Underwater concrete is specifically designed for placement below the water line in challenging environments such as ports, harbours, bridge piers, metro tunnels, water industry structures and deep shafts in unstable ground. It is typically placed by pumping a specially modified concrete mix through a delivery pipe or using the tremie method, where concrete is discharged directly through a submerged pipe to prevent washout and maintain consistency. Because underwater concreting often involves complex site conditions, these mixes are carefully formulated to provide high cohesion, extended working time and resistance to washout even in flowing water. When designed and placed correctly, underwater concrete delivers durable, uniform and stable structures that perform reliably under demanding conditions.
Advantages of Underwater Concrete
- Suitable for installation below the water line in marine and civil engineering projects
- Can be used for ports, harbours, bridge piers, water treatment structures, metro tunnels and deep shafts
- Provides consistent placement using conventional concrete pumps or the tremie method
- Maintains uniformity and prevents segregation or washout during placement
- Designed to minimise leaching and material loss in varying water flow conditions
- Offers extended working time to suit complex placing and underwater conditions
- Delivers high cohesion and stability for durable underwater structures
- Reduces pressure differences in shafts by maintaining proper pipe submersion
- Ensures reliable performance and structural integrity even in unstable or flowing water environments
