. DUST PREVENTION AND ROAD PRESERVATION, 1914; 38 
Taste 1.—Analyses of asphaltic petroleums used in experiments at Lemon City, Fla. 
Light. | Heavy. 
E-xperi- Experi- 
ment 2. ments 1,3. 
SIGMA ANI CPD sh doo eedkco chabsaceeSygedeesoesGsuuaUecoacmoosensnuaoad 0.960 0. 992 
Flash noe ae af A doome bose re Oates cae eH edooo PUES ER OCDRA Se DEAE DOO BE anCore “lee 42 105 
iDwenimMing MOIiss Boodessendossondasebsesne ous EboeauSoousUEEsocbosbacsERasaeeE ACs 67 145 
Viscosity, Engler, specific Be SES A ECR AE OHO cis SE SEEPS oF ae aaa Ieee 6 we 1152. 4 29.0 
WOSSwoO MOULSTa tel Osa Cyc20 Sra MU Speen a feicmiets ce rclieia)srats atelsteinperieleretereals per cent... 27. 53 16. 33 
Float test on residue, 50° WS (GI) py os ete nei a bea BAS ate ce i UR aca 3 2/ 19// £2’ 40/” 
Percentage of total bitumen insoluble in 86° B. maphthay” 32ers Sees eee ene 10. 40 10. 83 
TDIDK@CL CA OOM SUS 45.5 do Saeco Ube ca bose eps anpeasonneoeenEasonsheehadeca- per cent.. 5. O01 5. 82 
SoluplewneC Sa Gotaliortumlen) esse ace ae cie rere ola) aiasaie cic ic lar reteiepeleisiersine dose. 99. 94 99. 94 
Orzanicimatier insoluble mete es soso ee SSS SE ESS eee oe does: 06 . 04 
Inor SAM CHU AUCCLAMS OUI Cevapeaeyatey stare ove efaveloi-]s/ayvarer= laters) eloin o/aieyaysieteisyoreatsiorsiere doze ALOK al oe -02 
BING Gre pee eager eee TS tS enc a Shclale. or cichs, oieys Vere miniege tee aetna doves. 100.00 100.00 
1 At 25° C., 50 c.c. 2 At 100° C.,100c.c. 3 Soft, sticky, with slight flow. 
TABLE 2.—Analysis of water-gas tar preparation used in experiments at Lemon City, Fla. 
No. 1 No. 2 
SDECIIC ror AVA by 255 yi) 207 © aes eryerclese aeisicla sintereiniets tasersraeie nese aera 1.084 1.120 
Viscosity, netee a HOO CEASDeCI CHa jetnse oe eece tote 113.3 224.5 
THE (924 X00 SOR Gu co eq ser oe rodecacase- oceanic Saceearasbr per cent.. 1. 54 1,75 
By vol- By By vol- | . By 
ume. weight. ume. weight. 
Distillation: 
NUNES Ss on SEAS O RS CSS O SOS CORE NEMO meta rutts per cent... 0.0 0.0 0..0- 0.6 
First light OUSHOMMO RC Fas toh Swe Sak doze. Eo 5 31.0 6 
Secondiightioils 10°70" C.)\. no. eg. tee cee dow 41.1 8 3,8 10 
eavays0uls} @LZOS— 2710 Coie ey eS es wy acne) do.... 3 34. 6 31.1 3 20. 4 17.5 
IsIGENA, CUS CLO =3i lb CS) paaanonsoacenosseonoacneaeoE doses 514.1 12. 5 6 13. 4 11.7 
PALCHELeSIGUCs aso ate see eGo cee Lote see we dokes 749.5 55. 0 864.4 69. 6 
HOE SAN celina Bn ores Re eB ORT Te Ot do.. 100.0 99. 9 100.0 | 99. 9 
1 At 25°C. 
2 At 50°C. 
3 Clear. 
4 Cloudy. 
5 Clear, showed 15.0 per cent insoluble in dimethyl sulphate. 
6 Clear, showed 12.5 per cent insoluble in dimethyl] sulphate. 
7 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 dimethy] sulphate. 
8 Hard, glossy. A 315°-350°C. fraction showed 11.25 per cent, and a 350°-375°C. fraction showed 10 per 
cent insoluble in dimethy! sulphate. 
ExpertmMent No. 1 (Heavy O1r—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 
texture 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 
at an average rate of 1.26 gallons per square yard, and allowed to 
stand for about four hours, when it was covered with sand and rolled. 
This treatment, in general, appeared to be a failure. 
