Group#: File:

THE COOPER UNION
Albert Nerken School of Engineering
SOIL MECHANICS LABORATORY
Experiment No. 9 - Consolidation of Clays
Name:

Date:

Group No.:
Members:

Location: Depth: Horizon:
Boring: Elevation: Agronomic Name:
Geological Region: Sample:
Description:

Formulae:

1) St = (hi/(1+ei))*(ei-et)            2) k = (cvgwav)(1+eav)             3) cv = (TuH2/t90)

H = average thickness of sample during increment, in cm t90 = time for 90% of settlement to occur, in s
hi = intial height of sample, in cm ei = void ratio at hi
et = void ratio at the end of any elapsed time eav = average void ratio for a given increment of pressure
k = coefficient of permeability, in cm/s av = coefficient of compressibility, cm2/s
g = unit weight of water, in g/cc Tu = Time Factor

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

 

Table 1 [Data Sheet (A)]: Sample Preparation Data

Convert between in & cm

  Initial Final
Water Contents
Weight of Ring, Glasses, & Wet Soil (g):
Weight of Ring & Glasses (g):
Weight of Ring, Glasses, & Dry Soil (g):
Weight of Water (g):
Weight of Dry Soil Sample (g):
Water Content (%):
Void Ratios & Saturations
Diameter of Ring (Sample), (cm):

Area of Sample, (cm2):

Height of Sample (cm):
Total Volume of Sample (cm3):
Specific Gravity, Gs:
Volume of Dry Soil Grams (cm3):
Volume of Voids (cm3):
Volume of Water (cm3):
Void Ratio, e:
% Saturation, S (%):

 


Table 2 [Data Sheet (B)]: Run Data

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 0 to 1/4 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 1/4 to 1/2 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 1/2 to 1 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 1 to 2 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 2 to 4 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 4 to 8 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
Total Compresson for this increment:
Cumulative compression for experiment:

 

Jump to Load Increment: 0 to 1/4 tsf, 1/4 to 1/2 tsf, 1/2 to 1 tsf, 1 to 2 tsf, 2 to 4 tsf, 4 to 8 tsf, 8 to 16 tsf.

Pressure Increment on Sample: 8 to 16 tsf.

Date

Time   (hr:min:sec)

Elapsed Time (min.) Dial Reading Compression (in.)
0
1/4
1
2 1/4
4
6 1/4
9
12 1/4
16
20 1/4
25
30 1/4
36
42 1/4
49
56 1/4
64
1440
Total Compresson for this increment:
Final Cumulative compression for experiment: