56 
BULLETIN 407, U. S. DEPARTMENT OF AGRICULTURE. 
The section was first patched in the same manner as section 2 and 
then re-treated. To avoid, if possible, the marked deterioration of 
this section during the winter, the material used on section 4 was 
selected for this re-treatment, instead of the original material. The 
cost of repairs was: 
Labor $7. 75 
Materials 5. 18 
Total 12. 93=S0. 0182 per square yard. 
Section No. 4. — Asphaxtic Petroleum. 
Section 4 remained in generally good condition. It required no 
preliminary repairs and was re-treated with the material originally 
used. An analysis of the bituminous material used on section 3 and 4 
is given in Table 57. 
Table 57. — Analysis of aspJialtic petroleums used on sections Nos. 2, 3, and 4, Wash- 
ington, B.C., 1915. 
Section* a£**f3 
Specific gravity 25°/25° C 
Flash point °C 
Burning point °C 
Viscosity at 25° C, 50 cc. Engler specific 
Loss, 5 hrs. at 163° C, 20 grams, per cent 
Float test on residue, 32° C. (time) 
Float test on residue, 50° C. (time) 
Percentage of total bitumen insoluble in 86° B. naphth; 
Fixed carbon, per cent 
Soluble in CS 2 (total bitumen), per cent 
Organic matter insoluble in CS 2 , per cent 
Inorganic matter insoluble in CS 2 , per cent 
Total, per cent 
0.963 
31 
84 
128.4 
23.14 
2' 37" 
1'4" 
5.96 
4.62 
99.94 
0.04 
0.02 
100.00 
0.949 
30 
70 
94.8 
30.51 
4' 35" 
1' 23" 
14.03 
7.70 
0.05 
0.05 
100.00 
Table 58. — Quantities and costs of re-treatments per square yard. 
Costs (materials). 
Section No. 
Area. 
Bitumen. 
Sand. 
Bitumen. 
Sand. 
Total ma- 
terials. 
2 
Sq. yds. 
1,129 
711 
1,330 
Gallon. 
0.044 
.229 
.150 
Cu. yd. 
0.003 
.007 
.007 
Cent. 
0.0089 
.0137 
.0090 
Cent. 
0.0044 
.0114 
.0122 
Cent. 
0.0133 
3 
.0251 
4 
.0212 
Costs (labor). 
Section No. 
Sweep- 
ing. 
Pouring 
oil. 
• 
Broom- 
ing oil. 
Spread- 
ing sand. 
Hauling 
sand. 
Superin- 
tendence. 
Total 
labor. 
Total 
costs. 
3 
Cent. 
0.0018 
.0048 
.0011 
Cent. 
0.0015 
.0014 
.0007 
Cent. 
0.0039 
.0057 
.0024 
Cent. 
0.0012 
.0024 
.nni2 
Cent. 
0. 0039 
.0046 
.ooos 
Cent. 
0. 0049 
.0058 
. 0052 
Cent. 
0.0172 
.0247 
.0014 
Cent. 
0. 0305 
2 
.0498 
4. 
.0326 
