Describe the procedure for determination of workability by compaction factor method.

Describe the procedure for determination of workability by compaction factor method.
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Procedure for determination of workability by compaction factor method: The procedure of determining the workability of concrete using compaction factor as per IS: 1199-1959 is as follows. 1. Take the freshly mixed concrete of any specific grade and fill it in upper hopper of compaction factor test apparatus with trap door 1 (TD1)in closed position. 2. After filling the upper hopper, open the TD1 and allow the concrete to free fall from upper hopper into lower hopper through dropping height 200mm with TD2 in closed position. 3. Now, immediately open TD2 and allow to free fall the concrete again from lower hopper into cylinder through same dropping height. 4. Repeat above steps till the cylinder fills with concrete completely. Take the weight of this partially compacted concrete as W1 gm. 5. Remove the concrete from the cylinder and fill it with same grade of concrete by properly compacting with vibration. 6. Take the weight of this fully compacted concrete as W2 gm. 7. Calculate the compaction factor of given concrete by using CF = (W1 / W2) 8. Depending upon calculated C.F., the degree of workability can be designated as follows. 

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