THE COOPER UNION
Albert Nerken School of Engineering
SOIL MECHANICS LABORATORY
Experiment No. 2 - Specific Gravity Determination
Name:

Date:

Group No.:
Members:

Location: Depth:
Boring: Elevation:
Sample: Description:

Variables:

Wf = Weight of flask in gm

Wfws = Weight of flask, water & soil in gm

Ws = Weight of Oven dry soil in gm

gw = Density of water in gm/cc

Wfw = Weight of flask & water in gm

Gs = Specific Gravity of soil grains

Formulae:

        1.    Wfw at Tx = (Wfw - Wf) at T1 * (gw at Tx) / (gw at T1) + Wfw

        2.    Gs at Tx = Ws / (Wfw + Ws - Wfws)

        3.    Gs at 20oC = Gs at Tx * (gw at Tx) / (gw at 20oC)

        4.    Gs at 4oC = Gs at Tx * (gw at Tx) / (gw at 4oC)


 

No. of Flask: Weight of Flask: Fraction Used:

SAMPLE PREPARATION DATA

Method of Air Removal
Wfw at T1 (gm)
T1 (oC)
Wfws at Tx (gm)
Tx (oC)
Wfw at Tx (gm)
Weight of beaker & watch glass (gm)
Weight of beaker, watch glass & soil (gm)
Ws (gm)
Gs at Tx
Gs at 20oC
Gs at 4oC