xc. 



W. H. WARREN AND S. H. BARRACLOUGH. 



Table XVII.— SUMMARY OF RESULTS OBTAINED IN 1878 OF 



SHEARING TESTS WITH PRESSED BRICKS IN CEMENT 



MORTAR (Castle Brand Cement). 



Description of Materials. 





Average shearing 

 strength in lbs. per 

 sq. inch after *7 days on 

 planes a.a. (figs. 10, 11) 



Average shearing 

 strength in lbs. per 

 sq. inch after 28 days on 

 planes a.a. (figs. 10, 11) 



Neat cement 





168 



213 



Crashed sandstone and cement, 



1 tol 



117 



146 



ditto 



2 to 1 



53 



73 



ditto 



3 to 1 



26 



48 



ditto 



4 to 1 



16 



45 



Bluestone dust and cement 



.1 to 1 



79 



136 



ditto 



.2 to 1 



47 



84 



ditto 



.3 to 1 



34 



45 



ditto 



.4 to 1 



23 



41 



Nepean River sand and cement 



1 to 1 



102 



105 



ditto 



2 to 1 



38 



45 



ditto 



3 to 1 



20 



24 



ditto 



4 to 1 



9 



14 



