Bui. 249, U. S. Dept. of Agriculture. 



Plate VIII. 



TOOGH/VESS TEST— 



HAR/OUS P/TOPOPT/ONS OE CEMENT TO SANO 

 SPECMENS CMED 28 04X5 



-$ 





% 





^ 



} 



-N 



K & 52 & 5 $1 



I 



% 



"5 



J 



") 



1 



1 



/*£/? CENT CEMENT TO TVT4L M(X 













Diagram Showing Results of Toughness Tests of Cement Mortars. 



