PROPERTIES OF PORTLAND CEMENT. PART III. 

 Table XXII. — Changes in physical properties, etc. — Continued. 



219 



Description. 



ceo 



O B 

 .Sol"! 



> 



^ = 2 





Setting time. 



Initial 

 set. 



Final 



set. 



OS 





















s 





S 



EC 





Cement made from hard mountain limestone and clay by the rotary process. 



Brand "0." 



Fineness=78.0 and 96.0 per cent. 

 Loss bv ignition=2.94 per cent. 

 Per cent of S03=1.19. 



27-30. 







3.094 



22.0 



1 



20 



2 



27-30. 



5 



3.08 



19.0 







50 



1 



26-29. 



21 



3.07 



20.8 



1 



30 



4 



27-30. 



33 



3.04 



21.0 



1 



10 



3 



26-29.0 



42 



3.03 



22.0 







25 



1 



27-28. 5 



77 



2.962 



23.0 







35 







27-28. 5 



90 



2.955 



24.5 



1 



5 



2 



Cement made from cement rock by the rotary process. 



Brand "N." 



Fineness=76.4 and 96.0 per cent. 

 Loss by ignition=1.58 per cent. 

 Per cent of SO3=1.80. 



28. 0-30. 







3.115 



21.0 



1 







2 



28. 0-30. 



3 



3.08 



21.0 



2 



35 



4 



27. 5-29. 5 



9 



3.04 



20.0 



1 



40 



3 



27. 5-31. 



16 



3.026 



20.0 



1 



20 



4 



27.5-31.0 



23 



3.004 



21.0 



1 



40 



4 



26.5-28.0 



30 



2.962 



22.0 







30 



3 



28.0 



35 



2.942 



22.5 







40 



4 



28.0-30.0 



45 



2.91 



23.0 







55 



4 



26. 0-29. 



100 



2.876 



25.0 



2 







24+ 





 30 

 30 





 30 







10 

 50 



Commercial rotary and set-kiln cement made at the same factory from the same 

 raw-ineal* and aerated In the same manner and titiie. 



Brand "O." Rotary process. 



Soundness=good. 

 Fineness=76.3 and 93.2 per cent. 

 Loss by ignition=1.99 per cent. 

 Per cent of SO.^=0.90. 



25-29 

 25-29 

 26-28 

 26-30 

 26-30 

 26-29 

 28-31 



: 



4 



7 



14 

 21 

 28 

 60 



3.107 



3.072 



3.056 



3.048 



3.04 



2.99 



2.91 



21.0 

 20.0 

 20.0 

 20.5 

 20.5 

 21.0 

 23.0 



10 



2 



10 



5 



30 



5 



15 



5 



40 



2 







3 



35 



5 







2 







5 



20 



5 



15 



4 



10 



3 



25 



•3 



40 



'" 



Brand "O." Set-kiln process. 



Soundness=good. 

 Fineness=79.2 and 95.4 percent. 

 Loss by ignition=1.94 per cent. 

 Per cent of SO,=0.89. 



2.5-29 

 2.5-29 

 26-28 

 26-30 

 26-30 

 26-29 

 28-31 



3.10 



3.07 



3.055 



3.05 



3.041 



2.99 



2.90 



2L0 

 20.0 

 20.0 

 20.5 

 2L0 

 21.0 

 23 



40 1 



50 



30 



50 



10 



40 



30 



a These samples were taken at the factory at the time that the cements were being 

 packed into barrels. 



