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Tremie pipe, which upper end connected to a hopper and lower end continuously submerged in fresh concrete, is used to place concrete at the exact location from a hopper at the surface. The reason to immerse the tremie pipe lower end is to prevent intermixing of both concrete and water.
A tremie is used to pour concrete underwater in a way that avoids washout of cement from the mix due to turbulent water contact with the concrete while it is flowing. This produces a more reliable strength of the product. Common applications include the following.
Tremie Concrete for Deep Foundations - EFFC
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Tremie concrete refers to placement by gravity feed from a hopper through a vertical pipe extending for above the surface to the underwater floor. As concrete flows from the bottom of the pipe, more is added to the hopper so that the tremie pipe is continuously charged with fresh mix.
2.1 General. 2.2 Clear Reinforcement Spacing. 2.3 Concrete Cover. Properties of Tremie Concrete. 3.1 General. 3.2 Rheology and Workability. 3.3 Concrete Stability. Mix Design. 4.1 Introduction. 4.2 Mix Design Considerations. 4.3 Materials.
The most common method of handling concrete under water is by tremie. A tremie consists essentially of a vertical steel pipeline, topped by a hopper and is long enough to reach from a working platform above water to the lowest point of the underwater formwork.
1. General. 1.1 Background. 1.2 Purpose and Scope. 2. Design Considerations Impacting Concrete Flow. 3. rheology of Tremie Concrete. 3.1 General. 3.2 Rheology. 4. Mix Design. 4.1 Introduction. 4.2 Mix Design Considerations. 4.3 Materials. 4.4 Proportioning and Production. 5. 7. 9. 11. 13. 14. 15. 17. 20. 6. execution. 6.1 General.
