COMPOSITION AND PROPERTIES OF NATURAL CEMENTS. 271 



200 



100 



. 



z 300 



200- 



i 



2 100 



i 



LU 



" 

 400 



300 



200 



.100 



MILWAUKEE CEMENT 

 86.4 $ PASSED NO. 50 SIEVE 



73.2^ 



78.6 PASSE 



68.0$ 



1:2 



ICA CEMENT 



q NO. s|c 



LOUISVILLE CEMENT 

 ASSED NO. 5O SIE 





1 2 3 4 5 6 7 8 9 10 11 12 

 AGE IN MONTHS 



FIG. 58.* Tensile strength of natural cements, Cairo Bridge tests. 



* From Johnson's " Materials of Construction ", p. 569. 



