1,000 



Strain (/iin./in.) 

 2,000 



15,000 



3,000 



^ 2,000 



1,000 _ 



Symbol 



Sphere 

 No. 



11 

 12 



13 



Condition 

 of 



Concrete 



(psi) 



dry 9,200 



saturated 9,960 



dry 9,760 



4' 

 46' 







d' 



O 



./^ 







.0 







.00 



6,000 



A 



*<' 



/ 



/ 



/ 



Conversion, 1 ft = 5,780 ii'm./in. 



0.1 0.2 0.3 0.4 0.5 



Displaced Water (ft ) 



Figure 20. Displaced water versus pressure for short-term implosion of preloaded spheres. 



2k 



