APPENDIX 

 OUTLINE OF SHEAR STRENGTH TEST PROCEDURE 



Compression test 

 A. Test 



1 . Take Initial extensometer dial reading 



2. Apply first load Increment and start test timing. 



3. Record dial reading at 15 seconds. 



4. Record dial reading and add next load increment at 30 seconds. 



5. Repeat steps 3 and 4. 

 B . Computations 



1 . Determine initial height of sediment cylinder. 



2. Determine change of height (Ah) at 30-second readings. 



3. Determine percent strain (Ah/h) at 30 second Intervals. 



4. Determine unit load/original area (total load/A). 



5. Determine corrected unit load, which equals unit load x (1-strain). 



6. Plot strain versus corrected unit load (Fig. 7a) 



o 

 Vane Shear Test 



A . Test 



1 . Secure sample container to prevent its rotation during the test. 



2. Lower vane into sample until top of vane Is at least 0.75 inches 

 below the surface. 



3. Record Initial dial settings (outer dial shows degrees of vane rotation 

 and Inner dial shows degrees of applied torque - see Fig. 8b). 



4. Start test by turning on motor. 



Prepared by Mr . C . M . Yeomans , 



From information prepared by Mr. G. H. Keller. 



69 



