OAF-1. OIL ASPHALT FOR POURED-JOINT FILLER, 



General. 



Physical and 

 fheinical proper- 

 ties. 



Methods of test- 

 ing. 



The oil asphalt shall be homogeneous, free from water, and 

 shall not foam when heated to 200° C. (392° F.). 

 It shall meet the following requirements : 



1. Specific gravity 25°/25° C. (77°/77° F.), 



not less than 0.980 



2. Flash point not less than 200° C. (392° F.) 



3. Melting point not less than 80° G. (172° F.) 



4. Penetration at 25° C. (77° F,), 100 g., 5 sec 30 to 50 



Penetration at 0° C. (32° F.), 200 g., 1 min., 



not less than 20 

 Penetration at 46.1° 0. (115° F.), 50 g., 1 sec, 



not more than 100 



5. Loss at 163° C. (325° F.), 5 hours not more than 1.0% 



Penetration of residue at 25° C. (77° F.), 100 g., 5 sec, 



not less than 20 



6. Total bitumen (soluble in carbon disulphide), 



not less than 99.5% 



a. Organic matter insoluble not more than 0.2% 



Tests of the physical and chemical properties of the oil asphalt 

 shall be made in accordance with the following methods : 



1. Specific gravity, U. S. Department of Agriculture Bulletin 



314, p. 5. 



2. Flash point (open cup), U. S. Department of Agriculture 



Bulletin 314, p. 17. 



3. Melting point, A. S. T. M. Tentative Standard D 36-16 T, 



Proceedings A. S. T. M. 1916, p. 549. 



4. Penetration, A. S. T. M. Standard Test D 5-16. 



5. Volatilization test, U. S. Department of Agriculture Bulletin 



314, p. 19, using 50 gram sample. 



6. Total bitumen, U. S. Department of Agriculture Bulletin 



314, p. 25. 



This specification provides for an oil asphalt filler to be used in 

 filling the joints of brick or stone block pavements. It may also 

 be used to fill expansion joints. 



All of the longitudinal and transverse joints between the brick 

 should, when clean and dry, be completely filled with the bitu- 

 minous filler heated to a temperature of not less than 350° F., 

 nor more than 400° F., as directed. The filler should preferably 

 be applied by means of pouring cans provided with a conical 

 outlet and means for the control of the flow of filler. A top 

 dressing of clean dry sand should be spread immediately after 

 the filler is applied. 



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