DUST PREVENTION AND ROAD PRESERVATION, 1914. : 3 



Table 1. — Analyses of csphaltic -petroleums used in experiments at Lemon City, Fla. 



Light. 



Experi- 

 ment 2. 



Heavy. 



Experi- 

 ments 1,3. 



SpeciSc gravity 25°/25° C 



Flash point 



Burning point 



Viscosity, Engler, specific. 



Loss, 5 hours at 163° C, 20 grams 



Float test on residue, 50° C. (time) 



Percentage of total bitumen insoluble in 86° B. naphtha. 

 Fixed carbon 



.per cent. . 



Soluble in CSa (total bitumen) . 



Organic matter insoluble. 



Inorganic matter insoluble 



.per cent. 



.do... 

 .do... 

 .do... 



0.G60 



42 



67 



i 152. 4 



27.53 



3 2' 19" 



10.40 



5.01 



0.992 



105 



145 



2 9.0 



16.33 



<2' 40" 



10.83 



5.82 



99.94 

 .04 

 .02 



Total do. . . 



100.00 



100.00 



i At 25° C, 50 c. c. 2 At 100° C, 100 c. c. » Soft, sticky, with slight flow. 



Table 2. — Analysis of water-gas tar preparation used in experiments at Lemon City, Fla. 





No. 1. 



No. 2. 





1.084 

 U3. 3 

 1.54 



1.120 





2 24. 5 





do.... 



do.... 



do.... 



do.... 



do.... 



do.... 



1.75 





By vol- 

 ume. 



By 

 weight. 



By vol- 

 ume. 



By 



weight. 



Distillation: 



Water 



First light oils to 110° C 



Second light oils ( 110°-170° C.) 



Heavy oils ( 170°-270° C. ) 



Heavy oils (270°-315° C.) 



Pitch residue 



0.0 



3.7 

 *1.1 



3 34.6 



6 14.1 



M9. 5 



0.0 

 .5 

 .8 

 31.1 

 12.5 

 55.0 



0.0 



3 1.0 



3.8 



3 20.4 

 13.4 

 8 64.4 



0.0 

 .6 

 .5 

 17.5 

 11.7 

 69.6 



Total 



100.0 



99.9 



100.0 



99.9 



i At25°C. 



2 At50°C. 



3 Clear. 



t Cloudy. 



6 Clear, showed 15.0 per cent insoluble in dimethyl sulphate. 



• Clear, showed 12.5 per cent insoluble in dimethyl sulphate. 



"' Hard, glossy. A 315°-350°C. fraction showed 17.5 per cent, and a 350°-375°C. fraction showed 12.5 per 

 cent insoluble in dimethvl sulphate. 



6 Hard, glossy. A 315°-350° C. fraction showed 11.25 per cent, and a 350°-375°C. fraction showed 10 per 

 cent insoluble m dimethyl sulphate. 



Experiment No. 1 (Heavy Oil — Penetration Method). 



Location: Station 0+00 to station 0+35.8=35.8 feet. 

 Area: 71 .6 square yards. 



Method. — It was attempted to produce a surface similar to that 

 of experiment No. 6 at Miami, but with a heavier application of 

 bituminous material. The conditions were adverse in the uneven 

 bure of the surface caused by crushing under the roller, as men- 

 tioned above, and in the Low temperature at which the bitumen had 

 to be applied on account of its tendency to foam when heated. The 

 application, though made evenly, puddled badly and produced, after 

 the spreading of the sand, a rough mat. The bitumen was applied 

 rate of L.26 gallons per square yard, and allowed to 

 itand for about four hours, when it was covered with sand and rolled. 

 This treatment, in general, appeared to be a failure. 



