DESIGN FOR RESERVOIR IN REINFORCED CONCRETE 233 



cement mortar. Separate forms will require to be made for the piers, 

 and firmly attached to the forms illustrated. Probably the best procedure 

 is to have sufficient forms to reach completely round the tank, and to 

 raise the walls horizontal layer by horizontal layer. Each layer 



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Pig. 184.— Section through pier. 



should be completed, and left until the concrete cannot be indented by 

 the thumb nail, before shifting up the forms for the next fill. Imme- 

 diately before depositing any part of a new layer, the upper surface of 

 the old layer below that part should be cleaned if necessary, and grouted 

 with 1 : 1 cement grout. This will give a good bond between layers. 



