74 DEPARTMENT BULLETIN 1216, U. S. DEPT. OF AGRICULTURE 
50. METHOD OF FLOAT TEST FOR BITUMINOUS 
MATERIALS 
(A. S. T. M. standard method ('/), serial Designation D 139-27) 
APPARATUS 
92.0±2.0mm. 
Tapered 
to make 
^1.4+0.1 mm.y 
Thermometer--. 
Float 
Weight--' 
off^' Vimo.s\ \ 
** mm. ' . 
Float. 1 
(Aluminum) \ s „ 
9.70 \j Standard 
Tapered W |t^ § 
to make j| | f jQcv, 
tofght-' lL 1 «* + 
:'\I2.82\ ' 
I40±0.I0 \ 1*A*I 
Thread! 
mm: 
0.10 
mm. 
Collar. 
(Brass) 
Weight of Float, 37. 90 ± 0. 20 g. 
Weight of Collar, 9. 80 ± 0. 20 gj 
Assembly. 
Fig. 28. — Float -test apparatus 
1. The float (fig. 28) shall be made of aluminum or aluminum alloy and shall 
be in accordance with the following requirements : 
Minimum 
Normal 
Maximum 
37.7 
34.0 
26.5 
1.3 
11.0 
37.9 
35.0 
27.0 
1.4 
11.1 
38.1 
Total height of float, milliaieters___ ._ . 
36.0 
27.5 
1.5 
11.2 
