Compaction factor test

June 19, 2017
2569 Views

This test works on the guideline of deciding the level of compaction accomplished by a standard measure of work done by enabling the concrete to fall through a standard height. The level of compaction is called the compacting element is measured by the density ratio.

Apparatus required:

  • Cylinder
  • Weight balance
  • Compaction factor equipment’s ( upper hopper, lower hopper, stand)

Compaction factor test procedure:

  • Perfect and dry the interior surface of the container
  • With the assistance of hand scoop, put the concrete in upper hopper.
  • Open the trap entryway of container with a specific end goal to encourage the falling of the concrete into lower container. The concrete adhering to the sides of the container an, ought to be pushed descending with the assistance of a steel pole.
  • Open the trap entryway of the container B and enable the solid to fall into container
  • Expel the surplus cement from the highest point of the chamber with the assistance of a trowel. Wipe and clean the outside surface of the chamber.
  • Measure the chamber with somewhat compacted concrete closest to 10 g.
  • Fill in the container with concrete in layers not surpassing 5 cm in thickness and smaller each layer till 100 percent compaction is achieved.
  • Wipe off and clean the outside surface of the chamber and measure the cylinder with completely compacted concrete.
  • Find the compaction value using the formulas

Formula:

Compaction factor = weight of partially compacted concrete/Weight of fully compacted concrete

 

Result:                                                  

Compaction factor of concrete=

Result comparison chart:

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