how to find specific gravity of fine aggregate


how to find specific gravity of fine aggregate

 Apparatus and material
1.      Pycnometer bottle

2.      Balance of accuracy 0.001g

3.      Vacuum source


4.      Fine aggregate




  Procedure

1.        For fine aggregate particle size less than 4.75 mm 500 gram of sample taken.

2.      The pycnometer bottle should be well washed, cleaned, dried, and weighted accurately on sensitive balance.



3.      It should than be filled with water to the top of the hole, so that surface of Water in the hole is flat.

4.      The pycnometer than be dried on the outside & weighted accurately.

5.        About 500 grams of the above sample was transferred to the pycnometer & weighted.
6.      The pycnometer was filled with water and dry air entrapped in the aggregate was topped with water to the level or the hole in the cone as before and the entire front removed from the surface.

7.        The pycnometer was dried on the outside and weighed accurately.

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