

FOEMS FOE SPECIFICATIONS, ETC., FOE EOAD MATEEIALS. 



23 



2. Flash point, not less than ° 0. ( ° F.). 



[or ° C. ( ° F.) to ° O. ° F.).*] 



3. Specific viscosity at 100° C. (212°F.) to 



4. Float test at ° C.f ( 1 F.), to sec. 



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



per cent. 



(or to per cent.*) 



(a) Float test of residue 50° C. (122° F.), to 



sec. 



[or penetration of residue at 25° C. (77° F.), 

 100 g., 5 sec, to ] 



6. Total bitumen (soluble in carbon disulphide) not less than 



per cent. 



7. Per cent of total bitumen insoluble in 86° B. naphtha, 



to 



Tests of . the physical and chemical properties of the road oil 

 shall be made in accordance with the methods described or re- 

 ferred to on page of these specifications, tests Nos. 



Notes. — (1) In some instances it may be considered desirable 



to include a requirement for the percentage of residue of 



penetration, in which case the wording should be : Percentage of 

 residue of penetration, to per cent. 



(2) In certain cases the inclusion of all the tests listed or noted 

 may not be desirable, but it is necessary to use certain combina- 

 tions of the tests in order to secure a material suitable for a 

 specified purpose. 



Methods of 



testing. 



SPECIFICATION FOR ASPHALT CEMENTS FOR USE IN BITUMINOUS MACADAM. 

 BITUMINOUS CONCRETE AND SHEET ASPHALT, OR AS SEAL COAT OR POURED 

 JOINT FILLER. 



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



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



It shall meet the following requirements : 



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



2. Flash point, not less than °C. (— °F.). 



3. Melting point, °C. ( °F.) to °C. ( °F.)„ 



(or ductility at ° O. ( ° F.), not less than 



cm. (or to cm.) 



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



to 



* In cases where the presence of a volatile or light flux is desired, the 

 second form of the flash-point requirement and of the loss at 163° C. re- 

 quirement should be used ; in all other cases the first form of requirement 

 is applicable. 



t It is recommended that the float test be made at 32° C. (90° F.) or 

 50° C.) (122° F.), according to the nature of the product desired. 



% In some instances it may be desirable to insert a requirement for 

 penetration at the temperatures of 0°C. (32°F.) and 46.1°C. (115°F.) in 

 which cases the clauses would read as follows : Penetration at 0°C. 



(32°F.), 200 g., 60 sec, _■ to , or not less than 



Penetration at 46.1°C. (115°F.), 50 g., 5 sec, to , [or not 



more than ]. 



General. 



Physical a 11 d 

 chemical proper- 

 ties. 





