Question

Which one of the following methods/techniques will be used for placing of concrete 'in dewatered 'Caissons or Coffer ‘dams?
1. Tremie method
2. Placing in bags
3. Prepacked concrete
4. In-the-dry practice

Answer 1

Correct Answer - Option 4 : In-the-dry practice

Method/technique for placement of Concrete	Conditions/ Locations for placement of Concrete
Concrete must be placed in horizontal layers not less than 150 mm depth	Concreting in walls, footings, and other thin sections
Dropping from considerable heights  (dry practice)	Concrete in cast-in-situ piles and deep caisson
Batching of concrete	Concreting in slab
Fixed form paving or Slip form paving	Concreting in highway or runway pavements
Tremie Method	Placement of concrete underwater
Pre-packed concrete	Placement of concrete underwater when the Tremie method is not feasible.