vertical effective stress, o. 



porous stone 



no lateral 

 strain 



f f ' U U 



diameter, d 



height = 1/3to 1/4d 



Figure 17. Idealization of consolidation test specimen. 





1 1 



1 1 



Natural specimen from Box 4 









tested in Karol-Warner 









Increment; 193 kPa to 385 kPa 









(4030psf to 8030 psf) 



- 



0.01 



\ 





- 



0.02 



-\^ 





- 





\ • 





— 













V^^^* 



0.03 



end of primary \ 

 — consolidation \ 



1 1 



1 1^^"----. 



- 



O 0.02 — 



S 



J, 



0.40 oj 



0.50 Z 



•a 



0.1 



Figure 18. 



10.0 100.0 



Time (min) 



1,000.0 



- 0.90 



10,000.0 



Typical curve of height change versus logarithm of 

 time for an increment of load applied to one-dimen- 

 sional consolidation specimen. Such a curve is used 

 in identifying the end of primary consolidation. 

 (The curve is called a Terzaghi Type I curve [16].) 



33 



