PROPERTIES OF PORTLAND CEMENT. 



393 



versus free lime. 



Interpretation of microscopic test. 



Result of soundness tests. 







Soundness. 











Condition and amount 

 of free lime. 









In steam. 



In air. 



In water. 











In steam. 



In air. 



In water. 









No sintered lime. Lit- 



Sound 



Sound 



Sound 



Sound 



Sound 



Sound. 



tle if any nonsintered 















lime. Slaked lime 















in abundance. (A 















well-seasoned c e - 















ment.) 















Very little, if any, sin- 



do __ 



do... _ 



do.__. 



do 



do. 



Do. 



tered lime. A little 















slaked lime. A well- 















seasoned cement. 















Very little sintered 



do.. 



do 



do. 



do 



do ._. 



Do. 



lime. Fair amount 















of slaked lime. (A 















well-seasoned hard- 















burned cement.) 















No sintered lime. 



do.... 



do.... 



do.... 



do 



do.... 



Do. 



Slaked lime and a 















little nonsintered 















lime. 















No sintered lime. 



Uncer- 



Probably 



Probably 



Off plates, 



do— . 



Do. 



Nonsintered and 



tain. 



sound. 



sound. 



but sound. 







slaked lime in abun- 















dance. (An under- 















burned cement fairly 















well seasoned.) 















A little sintered lime. 



Sound 



Sound 



Sound 



Sound 



Sound 



Sound. 



Slaked lime. (A fair- 















ly well-seasoned ce- 















ment.) 















A small amount of 



do 



do 



do .... 



do 



do 



Do. 



sintered lime. A lit- 















tle nonsintered lime. 















Slaked lime in abun- 















dance. (Fairly well- 















seasoned under- 















burned cement. ) 















No sintered lime. A 



U n c e r- 



TJ n c e r- 



U n c e r- 



Badly dis- 



Sound off 



Sound off 



large amount of 



tain. 



tain. 



tain. 



integrat- 



plate. 



plate. 



slaked and nonsin- 









ed. 







tered lime. (Partial- 















ly seasoned under- 















burned cement.) 















A considerable amount 



Probably 



Probably 



Probably 



Slightly 



do — 



Do. 



of sintered lime and 



sound. 



sound. 



sound. 



disinte- 







slaked lime. (A 









grated. 







slightly seasoned, 















well-burned cement. ) 















