DENSITY OF SOIL IN PLACE BY THE CORE CUTTER METHOD
SCOPE:
This method covers the determination of the in-situ density of compacted soils by using core cutter.
APPARATUS:
PROCEDURE:
In the spot adjacent to that where the field density by sand replacement or balloon method has been determined, drive the core cutter using the dolly over the core cutter. Stop ramming when the dolly is just pround of the surface. Dig out the cutter containing the soil out of the ground and trim off any solid extruding from its ends, so that the cutter contains a volume of soil equal to its internal volume which is determined from the dimensions of the cutter. The weight of the contained soil is found and its moisture content determined.
OBSERVATIONS:
Wt. of Core-Cutter (W1) = gms.
Wt. of Core-Cutter + Wet Soil (W2) = gms.
Wt. of Wet Soil (Ws = W2 – W1) = gms.
Volume of Core-cutter Vc = c.c.
Bulk Density of Soil (rs = Ws/Vc) = g/c.c.
Dry Density of Soil (rd = ___rs___ )
1 + w = g/c.c.
Moisture Content:
Wt. of Container + Wet Soil (W) = gms.
Wt. of Container (Wc) = gms.
Wt. of Container + dry Soil (Wd) = gms.
Wt. of Moisture ( W – Wd) = gms.
Wt. of dry Soil ( Wd – Wc) = gms.
Moisture content w %=(W -Wd) x 100 = gms.
Wd - Wc