412 



REIBLING AND REYES. 



After these samples had been dried, they were screened on a 2.5-centimeter 

 sieve to separate the fine clinker from the coarse. As shown by figure 15, the 

 fine clinker thus separated contained some good material (small, well -burned 

 parts of otherwise underburned clinker ) , and the coarse some bad, but the 

 relative amount in each case was small. 



The separated clinkers were then ground with 1.5 per cent plaster of Paris 

 in a ball-mill until no residue remained on the 100-mesh sieve. They were then 

 subjected to the tests recorded in Table XTX. 



Table XIX. — Tests of disintegrated and sound seasoned clinker. 



1 



Fineness. 



s- o 

 Mg 



iH 



CE ci 



o 



c 



OJO^. 

 to 



CC 



O 



"3 



a. 



(- " . 



c S 



- R 



o 

 t- *-- 

 °.£ 



14-1 CC 



^ c 



CJ o 

 +-» t) 



Soundness 



(5-hour 

 steam test). 



Set. 



Free lime (micro- 

 scopic test). 



o 



°i 



9 A 

 O w 



o . 



O 0) 

 r-\ > 



bo'55 



— CD 



"5 



s 



"3 



c 





P.ct. 



P. ct. 





P. C«. 



P.c«. 





?(. TO. 



A. TO. 





Disintegrated clinker- 



76.0 



100.0 



2. 922 



9.52 



21.0 



Sound, but 

 a littl e 



1 



3 



A little amorphous 

 lime. Much 













soft. 







slaked lime. 



Disintegrated clinker 



77.6 



100.0 



2. 794 



11.59 22.0 



Sound 



50 



3 30 



Much slaked lime. 



aerated 3 days, fre- 

















quently remixed. 



















Sound clinker 



80.6 



100.0 



3. 05 



3.S7 ; 19.0 do.. 



1 30 



2 18 



A very little sin- 

 tered and slaked 















lime. 



Strength tests in pounds per square inch. 



• 



Tensile strength. 





Xeat. 



1 to 3 Ottawa sand mortar. 



7 days. 



28 days. 



3 

 months. 



8 

 months. 



7 days. 



28 days. 



3 

 months. 



8 

 months. 



Sound clinker _. 



605 

 278 



2S0 



701 



718 



710 

 577 



582 



248 



88 



88 



288 

 142 



144 



345 

 219 



224 



364 

 245 



245 



Disintegrating clinker 



Disintegrating clinker 

 aerated 3 days _. 



385 ! 443 

 391 495 



Sound clinker 





Compression strength of broken briquettes. 



5,967 



7,641 



• 7, 965 



7, 695 



1,836 



2,484 



2,781 



3, 172 





Disintegrating clinker 

 aerated 3 days 



2,980 



3,969 







4,725 



6,993 



630 



1,242 



1,377 



1,890 





