Reibling A>fD Reyes: Portland Cement Materials.] [Phil. Journ. Sci., IX, A, No. 2. 



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 Stekmed Pat 

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 2[ %watBr 

 SteamEd Pai\ 



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Mixt'lV 

 20%watEr 

 Steam ed Pat 

 6~7-/3„ 



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21% water 



Steamed Pat 



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 2l%\Mttr 



21% water 

 Steamed Pat. 



2i;% w^r 



Steamed Pil 





PLATE I. SOUNDNESS PATS OF NAGA CEMENT AFTER FIVE-HOUR STEAMING TEST. 



