FOEMS FOE SPECIFICATIONS, ETC., FOE EOAD MATEEIALS. 23 
2. Flash point, not less than ° C. ( ° F.). 
[or ° C. ( ° F.) to ° O. ° F.).*] 
3. Specific viscosity at 100° C. (212°F.) to 
4. Float test at ° C.f ( ° 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 Methods of 
shall be made in accordance with the methods described or re- testing, 
f erred, 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. 
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 General. 
shall not foam when heated to °C. ( °F.). 
It shall meet the following requirements : 
1. Specific gravity 25°/25°C. (77°/77°F.), to Physical and 
_ _,. , . , , ,, 0r , / o T ^ . chemical proper- 
2. Flash point, not less than C. ( F.). ties. 
3. Melting point, °C. ( °F.) to °C. ( °F.). 
(or ductility at ° C. ( ° 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. 
t 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 ]. 
