Fig. 1: Balance
Balance should be able to weigh upto 1 g.
The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. It is more precise and sensitive than the slump test and is particularly useful for concrete mixes of very low workability as are normally used when concrete is to be compacted by vibration. The method applies to plain and air-entrained concrete, made with lightweight, normal weight or heavy aggregates having a nominal maximum size of 38 mm or less but not to aerated concrete or no-fines concrete.
IS 1199:1959 Methods of Sampling and Analysis of Concrete (Eleventh revision). Reaffirmed- Dec 2013.
|Sr. No.||Description||Sample 1||Sample 2||Sample 3|
|1||Weight of Empty Cylinder (W1)|
|2||Weight of Empty Cylinder + Free Fall Concrete(W2)|
|3||Weight of Empty Cylinder + Hand Compacted Concrete (W3)|
|4||Weight of Partially Compacted Concrete(WP = W2 - W1)|
|5||Weight of Fully Compacted Concrete(WF = W3 - W1)|
|6||Compaction Factor = WP/ WF|
Table 1 : Compaction Factor Test
|Workability||Compaction Factor||Slump (mm)|
|Very Low||0.78||0 - 25|
|Low||0.85||25 - 50|
|Medium||0.92||50 - 100|
|High||0.95||100 - 175|
Table 2 :Relation between Workability and Slump