THE COOPER UNION Albert Nerken School of Engineering SOIL MECHANICS LABORATORY Experiment No. 5 - Compaction Test
 Name: Date: Group No.: Members:

 Location: Depth: Boring: Elevation: Sample: Description: Grooving Tool:

 Formulae: 1) Porosity = (62.4 Gs - dry unit wt.) / (62.4Gs) 2) Dry Unit Wt* = (62.4 Gs) / [1 + ((moist. cont.) Gs / S)] *This formula is only for computaional dry unit weights.

TABLE 1

 Diameter of Mold, in. Depth of Mold, in. Volume of Mold, ft3 Weight of Mold and Base, gm. Weight of Hammer, lbs. Height of Fall of Hammer, in. No. of Layers No. of Blows per Layer Compaction Energy, in-lbs/ft3

TABLE 2

 Specific Gravity Gs =
 Determination Number 1 2 3 4 Weight of Mold and Wet Soil, gm. Weight of Mold, gm. Weight of 1/30 ft3 Wet Soil, gm. Wet Unit Weight, pcf.
 Weight of Container and Wet Soil, gm. Weight of Container and Dry Soil, gm. Weight of Moisture Weight of Container, gm. Weight of Dry Soil, gm. Moisture Content, %
 Dry Unit Weight, pcf. Porosity, % Dry Unit Weight (Theoretical) at S = 100% Dry Unit Weight (Theoretical) at S = 80%

TABLE 3

Determination No. 1

 Penetration, in. Number of Divisions Load (lbs) Stress (psi) 0.000 0.025 0.050 0.075 0.100 0.200 0.300 0.400 0.500

Determination No. 2

 Penetration, in. Number of Divisions Load (lbs) Stress (psi) 0.000 0.025 0.050 0.075 0.100 0.200 0.300 0.400 0.500

Determination No. 3