ETL 1110-l-139
22 Jun 90
,
An asphalt supplier can provide asphalt cements that meet the require-
ments in Table 1 of Enclosure 1 (from ASTM D 3381).
and penetration
data for the asphalt cements are given below.
AC-10
AC-20
AC-40
2,200
4,104
Viscosity, 140" F, P
872
435
605
F,
298
Penetration,
F, 0.1 mm
123
70
46
From Table 4 of Enclosure 1, an asphalt cement that has a penetration of
approximately 60 to 70 should be selected. The AC-20 asphalt cement should be
selected for this pavement.
Asphalt Cement Selection in a Warm Region
Example 3.
A street should be constructed in a region that has a pavement tempera-
(23.3, cumulative "C).
ture index of 42, cumulative
An asphalt supplier can provide asphalt cements that meet the require-
ments in Table 1 of Enclosure 1. Viscosity and penetration data for the
asphalt cements are given below.
AC-10
AC-5
AC-20
1,120
2,170
F, P
560
Viscosity,
335
450
275" F,
180
Penetration,
F, 0.1 mm
96
70
145
Based on Table 4 of Enclosure 1, an asphalt cement that has a penetration of
approximately 85 to 100 should be selected. The AC-10 asphalt cement is
selected.
Example 4.
Asphalt Cement Selection in a Cold Region
At Fort Drum, NY, a heavy duty open storage area (design index of 10) for
use by 50,000 lb forklift trucks has to be constructed in a region with a
pavement temperature index of 2, cumulative
(1.1, cumulative
and a DFI
of 2,300 degree-Fahrenheit-days (1,278 degree-Celsius-days) calculated using
TM 818-2.
An asphalt supplier can provide two asphalt cements that meet the
requirements in Table 1 of Enclosure 1. Viscosity and penetration data for
the asphalt cements are given below.
AC-5
AC-Z.5
466
280
Viscosity, 140" F, P
220
F,
140
240
296
Penetration, 77" F, 0.1 mm
10
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