Dry density by core cutter method Test for Soil compaction

For whom core cutter method Test for Soil Compaction is Done?

Dry density by core cutter method is done for Both Excavated Soil and Soil from Borrow area.

1. For foundation individually excavated up to 20 Sqm One Test for each compacted layer shall be carried out and for foundation, individually excavated with more than 20 Sqm area, one test at longer side and one test at shorter side of foundation Shall be carried out.
2. For filling of large excavated area, Paving area etc. One test in every 500 Sqm for each compacted layer.
3. Test shall be carried out for each compacted layer. Loose layer thickness shall be 250 mm for both points stipulated above.

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What is determined by the core cutter method

1. Maxi. Dry Density by core cutter method

B ) Optimum Moisture Content

Technical specifications for the core cutter method

1. Min 95% of the Maximum Dry Density for filling around structures.

2. Min.90% Maximum Dry Density   where there is no further structural load going to come.

3.Min. 98 % Maximum Dry Density for Roads.

Dry density by core cutter method process

Dry density by core cutter method is done as per  IS 2720.

1. In this method of soil compaction cylindrical core of 130mm long and 100mm diameter are used for onsite testing of Soil compaction to determine the Field density and find out the Percentage of the compaction by the ratio of the Lab density to Field density.

Procedure followed for Core Cutter method

1. Find out the internal diameter and height of the core cutter
2. Determine the mass (M₁) of the cutter .
3. Properly Level the surface, before putting the core cutter.
4. Apply the force over dolly over the top of the core cutter and let the core cutter goes into the soil mass using the rammer.
5. Remove the soil around the core cutter, and take out the core cutter.
6. Trim the tip and bottom surface of the core cutter carefully using a straight edge cutter .
7. Weigh the core cutter filled with the soil (M₂).
8. Determine the water content with the help of moisture meter or Oven
9. Determine the Field density and moisture content.
10. Determine the compaction percentage by comparing the lab density with field density.

Sample of format of Dry density by core cutter method