STATE GEOLOGIST. 
Tensile Strength in Pounds Per Square Inch. 
| | 
Age. Neat. 1 Cement : 3 Sand, 
24 hours 330 75 
7 days 502 223 
14“ 610 310 
Pilea: 545 322 
23 715 348 
3 months 655 340 
Gr 728 340 
1 year 758 343 
2 years 7 68 408 
ns es 
Table of Chemical Analyses of Slag Cements Examined. 
Cement. A | B C D E 
I PINT ANS Ce oh Se e ve en 55.85 63.50 56.55 (54.75 53.30 
SUNGA er al Pearehn eueretesaitos a8 28.81 19.46 27.48 29.50 20.08 
Alumina and iron oxide.| 10.74 10.94 10.86 11.02 10.80 
IMaonesian teen a. 1.28 2.08 1.75 1.44 3.44 
Sulphur as Sulphide.... 0.35 0.43 0.30 0.47 
Sulphur as Sulphate....| trace 0.35 ' trace trace 1.36 
Loss on ignition........| 2.31 1.22 3.41 2.73 2.63 
169 
Cement E is really not a slag cement, but is made from slag, like 
Portland cement. 
Average of the Tensile Strengths Obtained by Breaking Six 
Briquettes of Each of the Preceding Five Cements. 
Pounds Per Square Inch. 
Age. Neat. hess 1:3 
24 hours 193 144 39 
7 days 404 390 163 
28 days AT7 403 174 
60 days 519 498 208 
90 days 507 483) | | Divi 
