Français
5. Underwater concrete placement
When pouring traditional concrete underwater, it is not uncommon for the material to become dislodged. The mortar and gravel separate, and the laitance leaches out. However, underwater concreting is essential for all marine and hydraulic works (construction or reinforcement of submerged foundations, superstructure foundations, dikes, canals, etc.).
The addition of active colloid can sometimes limit these problems of decohesion.
5.1 Traditional immersed concrete
To limit the washout of concrete cast under water, certain rules must be applied to the choice of constituents and the composition of the concrete.
The material's workability must be maximized to achieve maximum in-place compactness by simple gravity...
The Ultimate Scientific and Technical Reference
This article is included in
The superstructure of the building
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Underwater concrete placement
Vacuum concrete dewatering
Bibliography
Standards and norms
- Repair and reinforcement of concrete and masonry structures – shotcrete. - NF P 95-102 -
- Project concrete – Part 1: Definitions, specifications and compliance. - NF EN 14487-1 -
- Shotcrete – Part 2: Execution. - NF EN 14487-2 -
- Shotcrete tests – Part 1: sampling of fresh and hardened concrete. - NF EN 14488-1 -
- Shotcrete tests – Part 2: early age compressive strength of shotcrete. -...
Directory
Organizations – Federations – Associations (non-exhaustive list)
-
ASQUAPRO – Association for the quality of concrete spraying
The Ultimate Scientific and Technical Reference
