Group#: File:

THE COOPER UNION
Albert Nerken School of Engineering
SOIL MECHANICS LABORATORY
Experiment No. 11 - Triaxial Compression Test On Cohesionless Soils
Name:

Date:

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   I. Soil Sample Test Number:
Color: Date:
Sieve Fraction: Tested by:

II. Formulae 5) Dr =  (1 / gd(min) - 1 / gd ) / ( 1 / gd(min) - gd(max) ) * 100%
1) e = ( DL / L0 ) * 100%
2) Ai = A0 / ( 1 - ez )
3) s1 = s3 + P / Ai
4) d = ( DV / V0 ) * 100%

 

III [Data Sheet (A)]: Soil Specimen Data

Determination Number: 1
IV. Soil Specimen Weight
 

    Top                    

Initial Diameter of Sample, D0 (cm.):

    Middle                

 

    Bottom               

 

    Average             

 

    L01        in     cm

Initial Length of Sample, L0 (cm.):     L02        in    cm
      L03        in    cm
Thickness of Membrane (in):  
Correction (in):

                 in    cm

Corrected Average Diameter (cm):
V. Soil Specimen Volume
Initial Area of Sample, A0 (cm2):

                 in     cm

Initial Volume of Sample, V0 (cm3):                in     cm
Dry Unit Weight of Sample, gd (pcf.):
Maximum Dry Unit Weight, gd(max) (pcf.):
Minimum Dry Unit Weight, gd(min) (pcf.):
Relative Density, Dr (%):
VI. Initial Volume Change
Burette Reading @ 0 psi:
Burette Reading @ psi:
VII. Load Ring Number
VIII. Load Ring Calibration Factor

 


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

IX. Longitudinal Rate of Strain (in/min): in/min
Chamber Pressure s3:: psi

 

  Longitudinal

Deformation,

Dial

(in. * 103)

Longitudinal

Deformation,

DL

(in.)

Longitudinal

Unit Strain, e

(%)

Load Ring

(# Div)

Axial Load, P

(lbs.)

Instantaneous

Area, Ai=A0/(1-e)

(cm2)

P/Ai

(psi)

s1

(psi)

s1 / s3

(psi)

Burette Reading

(cc.)

Volume Change, DV

(cc.)

Volume Unit Strain,

d

(%)

 

 

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