– A square tray with circular hole is taken.
– The tray is placed on the level ground. A small amount of soil is excavated
through the hole and weighed.
– Water content is determined by using oven drying method.
– The weight of the sand, filling the cone of sand bottle is determined seperately by filling the cone.(The sand filling the hole and cone should be of known weight.) And made the following calculations:
Let us consider,
Wt. of sand in the whole = W1
Wt. of sand bottle before pouring = W2
Wt. of sand bottle after pouring = W3
Wt. of sand filling the conical funnel = W4
Volume of sand filling the whole(V) = (W2- W3 – W4)/ r r= unit wt. of soil
Volume of sand filling the whole = Volume of Excavated soil
Bulk density of soil (rt) = W1/V
Dry density( rd) = rt / (1+w)
w= water content of soil determined by oven drying method.