UFC 3-250-03
15 May 2001
AC-5
AC-10
AC-20
Viscosity, 60EC (140EF), P
560
1,120
2,170
135EC (275EF), cSt
180
335
450
Penetration, 25EC (77EF), 0.1 mm
145
96
70
Based on table 2-3, an asphalt cement that has a penetration of approximately 85 to 100 should be
selected. The AC-10 asphalt cement is selected.
[2] Asphalt cement (D 3381 - residual asphalt cement). A parking lot is to be
constructed in a region that has a pavement temperature index of 23.2, cumulative EC (42, cumulative
EF). An asphalt supplier can provide asphalt cements that meet the requirements in table 3 from ASTM
D 3381. Viscosity and penetration data for the asphalt cements are given below.
AR-1000
AR-2000
AR-4000
Viscosity, 60EC (140EF), P
851
1,962
3,544
135EC (275EF), cSt
162
247
334
Penetration, 25EC (77EF), 0.1 mm
Original
145
87
53
Residue
99
55
39
Based on table 2-3, an asphalt cement that has a penetration of approximately 85 to 100 should be
selected. The AR-2000 asphalt cement is selected based on the original penetration of the material.
(c) Asphalt cement selection in a cold region. At a location in Watertown, NY, a heavy
duty open storage area (design index of 0) for use by 22,680 kilogram (50,000 pound) forklift trucks has
to be constructed in a region with a pavement temperature index of 1.1, cumulative EC (2, cumulative
EF) and a DFI of 1,278 degree-Celsius-days (2,300 degree-Fahrenheit-days) calculated using
TM 5-818-2. An asphalt supplier can provide two asphalt cements that meet the requirements in table 2
from ASTM D 3381. Viscosity and penetration data for the asphalt cements are given below.
AC-2.5
AC-5
Viscosity, 60EC (140EF), P
280
466
135EC (275EF), cSt
180
220
Penetration, 25EC (77EF), 0.1 mm
296
240
(3) Analysis and asphalt selection. The climatological data allow classification of the site by
temperature region and allow an estimate of pavement temperature. According to table 2-3, the
pavement temperature index classifies the site as a cold region where the PVN method should be used
to select the grade of asphalt cement. The DFI allows the use of figure 2-4 to estimate a minimum
pavement temperature at a 5 centimeter (2-inch) depth. From figure 2-4, a minimum anticipated
2-10
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