Compaction Factor Test
Compaction Factor Test
test is conducted in the laboratory. The test equipment consists of two hoppers and a cylinder fixed to a stand, the dimensions and the distances between the three vessels being standardized. Vessel A and B are having hinged bottoms whereas cylinder C is having fixed bottom.
Top vessel A is filled with the concrete to be tested. As soon as it is filled, the hinged door is
opened. Concrete is collected in vessel B. Then the hinged door of B is opened to collect concrete in
cylinder C. The concrete in cylinder C is weighted. Let it be W 1.
Now cylinder is again filled with the sample of concrete in 50 mm layers, which is compacted by
ramming and vibrating. Then the weight of compacted concrete is determined. Let this weight be W2.
The ratio W1/W2 is termed as compaction factor. The specified values of compaction factor for
different works are already listed
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