OIL-MIXED PORTLAND CEMENT CONCRETE. 
17 
There were 37 per cent of voids in the sand, 43 per cent in the stone, 
and 37 per cent in the gravel. 
The cement passed the specifications of the American Society for 
Testing Materials. 
Various types of oils were used, and these are described in the fol- 
lowing table: 
Table 4. — Analysis of oils used in oil-cement-concrete mixtures. 
Sample No. — 
4145 
4146 
4147 
4149 
4170 
4923 
4981 
5053 
6464 
7393 
Type 
C 1 ) 
( 3 ) 
0.924 
6.86 
( 3 ) 
0) 
( 3 ) 
0.910 
12.56 
( 3 ) 
C 1 ) 
( 3 ) 
0.926 
7.98 
( 3 ) 
0) 
( 3 ) 
0.923 
7.02 
( 3 ) 
( 2 ) 
0) 
18.38 
( 6 ) 
0) 
( 3 ) 
0.945 
1.35 
( 3 ) 
0) 
( 5 ) 
0.893 
27.17 
( 7 ) 
C 1 ) 
( 5 ) 
0.924 
3.70 
( 8 ) 
C 1 ) 
( 3 ) 
0.904 
0.10 
( 9 ) 
0) 
( 3 ) 
0.949 
19.38 
Specific gravity at 25°/25° C... 
Per cent of loss at 163° C, 5 
(*) 
Per cent of bitumen soluble in 
99.99 
.01 
.00 
99.99 
.01 
.00 
99.93 
.07 
.00 
99.95 
.05 
.00 
99.81 
.13 
.06 
99.96 
.04 
.00 
99.95 
.02 
.03 
99.90 
.07 
.03 
99.90 
.10 
.00 
99.95 
Per cent of organic matter in- 
.05 
Per cent of inorganic matter 
.00 
Total (per cent) 
100. 00 
2.23 
2.41 
14.20 
100. 00 
6.82 
3.36 
6.40 
100. 00 
10.16 
5.11 
18.20 
100. 00 
2.24 
1.98 
20.20 
100. 00 
16.87 
100.00 
3.46 
4.18 
65.10 
100. 00 
1.00 
1.77 
2.50 
100. 00 
4.12 
2.82 
17.40 
100. 00 
1.10 
1.17 
13.50 
100. 00 
Per cent of total bitumen in- 
soluble in 86° B. paraffin 
2.45 
Fixed carbon 
2.87 
Specific viscosity, Engler, 50° C. 
12.20 
1 Fluid residual oil. 
2 Cut-back oil asphalt. 
3 Fluid, greasy. 
* Fluid, sticky. 
6 Fluid, slightly sticky. 
s Semisolid, sticky. 
7 Slightly granular, more viscous than original. 
s Fluid, granular in appearance. 
9 Very viscous, greasy fluid, rather lumpy; surface waxy. 
TENSILE STRENGTH. 
Table 5. — Tensile strength (1:3 mortar, Ottawa sand). 
Age in 
days. 
Per 
cent 
of oil. 
Laboratory No. of oil. 
4923 
4981 
5053 
6464 
7393 
7 
28 
180 
360 
720 

as 
5 
10 

2§ 
5 
10 

2| 
5 
10 

2i 
5 
10 

2J 
5 
10 
256 
299 
287 
252 
296 
400 
316 
331 
326 
449 
372 
360 
326 
320 
353 
343 
293 
257 
283 
259 
268 
264 
376 
327 
341 
329 
312 
323 
321 
319 
244 
297 
313 
304 
331 
353 
334 
371 
302 
298 
325 
330 
288 
286 
309 
320 
210 
""258"" 
308 
275 
""298"" 
403 
221 
230 
200 
195 
250 
270 
253 
260 
315 
