What Is Underwater Concrete?

Advantages of Underwater Concrete

1. Makes construction as well as excavation in a challenging atmosphere.
2. Offers an innocuous workplace environment.
3. Sheet piles become simple to construct and then uninstall.
4. Materials may typically be utilized on certain programs.

Disadvantage of Underwater Concrete

1. Quickly rising water will expel a scour gap, but this is one of the primary contributors of the bridge collapse.
2. Cracking, scaling, crazing including potting are quite popular in concrete.
3. Rebar is steel reinforcing bars that have been actively mounted only within concrete and experience corrosion.
4. Concrete bent, flattened, or stacked up due to lack of proper implementation including environmental conditions.

Application of Underwater Concrete

1. Bandra Worli Sea Link, Mumbai, where underwater cement is utilized.
2. Pamban Setu, Rameswaram.
3. Sardar Sarovar Dam.
4. Salem Hydro project, Salem, Andhra Pradesh.

1. Hydro projects.
2. Marine development.
3. Metro projects.
4. Repair of underwater concrete (solid tanks, dams, and water-driven designs).

Can Concrete Cure Underwater?

How Do They Pour Concrete Under Water?

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Pouring Concrete Underwater

• Caissons.
• Cofferdam.

1. Caissons

2. Cofferdam

Concrete Placing Methods

1. Tremie method.
2. Pumping technique.
3. Hydro valve method.
4. Pneumatic valve method.
5. Skip method.
6. Tilting pallet barge method.
7. Preplaced aggregate concrete.
8. Toggle bags method.
9. Bagged concrete method.

Tremie Concrete Placement

1. Underwater concrete when using the tremie process is ideal for pouring vast volumes of high-flowing concrete.
2. The concrete is transferred to the tremie by either pumping, belt conveyor, and skips.
3. The Tremie tubing, which will have the top range attached to the tremie and the lowest levels constantly immersed in fresh concrete, is being used to put concrete only at the exact situation of the tremie at the bottom.
4. The justification for immersing the lower part of the tremie pipe would be to avoid the intermixing of both concrete as well as water.

Underwater Concrete Method Using the Tremie Process:

Tremie Equipment

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Tremie Seal

Placing Concrete for Termine

Flow Pattern for Termine

Steps Underwater Concrete Repair

1. Repair of surface spalling.
2. Large-scale reconstruction of underwater reinforced concrete.
3. Pre-positioned aggregate concrete.
4. Injection procedure for underwater reconstruction of a concrete structure.
5. Gunting for the underwater restoration of a concrete structure.
6. Steel sleeve underwater concrete restoration procedure.

Underwater Concrete

What Is Underwater Concrete?

Advantage of Underwater Concrete

Disadvantage of Underwater Concrete

1. Rapidly rising water can eject the scour hole & it is one of the main fundamental causes of bridge failure.
2. Cracks, scaling, crazing, and potting are very common in concrete.
3. Rebar is steel reinforcement bars that are passively located within the concrete, they undergo corrosion.

Application of Underwater Concrete

How Do They Pour Concrete Under Water?

Pouring Concrete Under Water

Concrete Placing Methods

• Batching and Mixing.
• Transportation.
• Pumping.
• Placement of Concrete.
• Special Placement.
• Consolidation.
• Casting in Lifts.
• Finishing Concrete.

Tremie Concrete Placement

Can Concrete Cure Underwater

How to Underwater Concrete Repair?

1. A flush damaged region with fresh water completely.
2. Apply a bonding coat.
3. Apply the repair mortar before the coat is set.
4. Apply a curing membrane to the applied repair mortar.
5. Protect the repaired area against wave action until it hardened adequately.

Underwater concrete in Bleeding

Concreting in Water

Concrete Placement Methods

• Step 1. Batching and Mixing.
• Step 2. Transportation.
• Step 3. Pumping.
• Step 4. Placement of Concrete.
• Step 5. Special Placement.
• Step 6. Consolidation.
• Step 7. Casting in Lifts.
• Step 8. Finishing Concrete.

What Is a Tremie?

Concrete Under Water

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