PORTLAND CEMENT TESTING. 



145 



The samples included in the next table were received at the laboratory 

 in paper sacks on the 27th of the month. The next morning the two 

 sacks comprising each sami^le were screened and well mixed. One half 

 of each sample was then put into a tightly covered, galvanized-iron can, 

 and the other half put back into the original bag. The time of setting 

 was taken after seven, eleven, and twenty-four days with the results 

 ffiven in Table VI. 



Table VI. — Comparison of results of samples in paper hags and in closed cans.' 





Worked after 7 days. 



Temperature 

 during— 



Time 

 gauged. 







1 



Sample 

 No. 



Stored 

 in— 



Water. 



Initial 



set. 



Condition of 

 paste. 



Gauging. 



Setting. 



A. M. 







Pel- ct. 



/;. m. 





°C. 



°C. 



8.10 

 8.20 



1 

 2 



Can- 

 Bag 



21 

 21 



1 10 

 60 



Plastic. 



27 

 27 



27 -29.5 

 27 -29.5 



do 



8.30 



3 



Can 



21 



1 22 



do 



27 



27 -29.5 



8.40 



4 



Bag — 



21 



35 



do 



27.5 



27. 5-29. 5 



8..50 



5 



Can 



21 



60 



do 



27.5 



27. 5-29. 5 



9.00 



6 



Bag___ 



21 



12 



do ____ 



27,5 



27. 5-29. 5 



9.10 



7 



Can___ 



21 



1 10 



do 



27.5 



27. 5-29. 5 



9.20 



8 



Bag___ 



21 



20 



do 



28 



28 -29.5 



9.30 



9 



Can__. 



21 



55 



do____ ___ 



28 



28 -29.5 



9.-10 

 8.2.5 



10 



Bag.._ 



21 



13 



do 



28 

 27.5 



28 -29.5 

 27. 5-30 



Sample No. 8, worked after 11 days. 



8 



Can, 



21 



1 10 



Plastic 



8.35 



8 



Bag — 



21 



17 



do 



27.5 



27. 5-30 



8.45 



8 



Can___ 



22 



1 25 



do 



27.5 



27. 5-30 



9.00 



S 



Bag- 



22 



20 



do 



27.5 



27. 5-30 



9.10 



8 



Can— 



24 



1 30 



iToo plastic toi 

 ) hold its shape. 1 



27.5 



27. 5-30 



9.20 

 8.30 



S 



Bag_._ 



24 



38 



27.5 

 28 



27. 5-30 

 28 -30 



Worked after 24 days. 



2 



Bag- 



22 



21 



Very plastic 



S.40 



3 



Can 



22 



2 30 



-do 



28 



28 -30 



8..55 



3 



Bag — 



22 



20 



do 



28 



28 -30 



9.05 



4 



Bag.__ 



22 



1 30 



do 



28 



28 -30 



9.15 



4 



Can 



22 



2 30 



do 



28 



28 -30 



9.25 



8 



Can- 



22 



1 30 



do 



28 



28 -30 



9.35 



8 



Bag — 



22 



23 



do 



28 



28 -30 



"All pate were made by the same operator by the Gillmore needle method described below. 

 Before weighing, the original samples were thoroughly mixed. 



