UFC 3-270-01
15 March 2001
CHAPTER 6
ASPHALT SLURRY SEALS
6.1. Introduction. A slurry seal is a mixture of asphalt emulsion, aggregate, water, and mineral
filler. Slurry seals are used to seal and protect worn, weathered, and cracked pavement from the
effects of further weather and traffic. Another use is to reduce skid problems. A slurry seal is not
a normal repair for airfields or heavy traffic areas. The MAJCOM or TSMCX pavement engineer
should be contacted prior to using a slurry seal on these areas.
CSS-1, or CSS-1h. Aggregate gradations to be used are shown in the following table.
Table 6.1. Aggregate Gradations for Slurry Seals
% Passing by Weight, Gradation Designation
No. 2
Sieve Size
No. 1
No. 3
3/8 in. (9.5 mm)
100
---
---
No. 4 (4.8 mm)
70 - 90
100
---
No. 8 (2.4 mm)
45 - 70
78 - 95
100
No. 16 (1.2 mm)
28 - 50
55 - 80
70 - 94
19 - 34
35 - 60
45 - 73
No. 30 (600 m)
12 - 24
20 - 40
25 - 50
No. 50 (300 m)
7 - 16
10 - 22
10 - 25
No. 100 (150 m)
4 - 12
4 - 12
4 - 14
No. 200 (75 m)
35
6
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