foundation system of burj al arab

STUDY ON STRENGTH OF CONCRETE USING VARIOUS COARSE AGGREGATES, PART-10

(d) Placing: The concrete must be placed in a systematic manner to yield optimum result. The placing and compacting operations are, perhaps, the most critical field activities. 


(e) Compaction: It is the process adopted for expelling the entrapped air from the concrete. The different processes of compaction are - 

(1) Hand compaction 

# Rodding 

# Ramming 

# Tamping 

(2) Compaction by vibrator 

(3) Compaction by pressure or jolting 

(4) Compaction by spinning 


(f) Curing: It is the process of maintaining satisfactory moisture content and a favorable temperature in concrete during the period immediately following placement, so that hydration of cement may continue until the desired properties are developed.  


Heat Curing

Methods: (1) Water curing 

# Immersing 
*
Membrane curing 

Heat Curing by Powerblanket

# Ponding 

# Spraying 

# Water covering 

(2) Membrane curing 

(1) Application of heat 

(2) Miscellaneous

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