UFC 3-260-02
30 June 2001
8.
MINIMUM THICKNESS REQUIREMENTS FOR RIGID PAVEMENTS.
a. Army and Air Force. The minimum thickness of aggregate base course under rigid pavements
will be 100 millimeters (4.0 inches) over CH, CL, MH, ML, and OH subgrades or that required to meet
minimum thicknesses for drainage layers as shown in EI 02C202/AFJMAN 32-1016.
b. Navy and Marine Corps. The minimum thickness requirements for aggregate base courses are
listed in Table 8-6. The minimum thickness for granular materials is set for construction purposes. The
additional base thickness required over clays and silts is to aid in preventing pumping. Consider
experience with local aggregates and materials when selecting the base course thickness.
Table 8-6
Aggregate Base-Course Minimum Thickness Requirements for Navy and Marine Corps Rigid
Pavements
Base Material
Minimum Thickness
Granular Material
152 mm (6 in.)
Cement Stabilized
152 mm (6 in.)
Asphalt Stabilized
152 mm (6 in.)
Asphalt Concrete
102 mm (4 in.)
Lean Concrete Mixture
102 mm (4 in.)
Note: For subgrades classified as CH, CL, MH, ML, or OL, the minimum granular base-course
thickness shall be 203 mm (8 in.).
9. COMPACTION AND PROOF ROLLING REQUIREMENTS FOR FLEXIBLE PAVEMENTS. The
aggregate base course will be compacted to 100 percent of ASTM D 1557 maximum density. In addition
to compacting the base course to the required density, proof rolling shall be performed on the surface of
completed aggregate base courses as designated below. Open-graded and rapid-draining layers will
not be proof rolled. The layer immediately under lying the open-graded or rapid-draining layer shall be
proof rolled instead. The proof roller will consist of a heavy rubber-tired roller having four tires, each
loaded to 13,608 kilograms (30,000 pounds) and inflated to 720 kPa (125 psi). Repetitions of the proof
roller are expressed as coverages where a coverage is the application of one tire print over each point
on the surface of the designated area. TM 5-820-2/AFJMAN 32-1016 presents special proof rolling and
compaction requirements for drainage layers.
a. Air Force Bases. Proof roll top of subbase and each layer of base course of type A traffic areas
and the center 23 meters (75 feet) of heavy, modified heavy, and medium load runways with
30 coverages.
b. Navy and Marine Corps Airfields. Proof roll top of completed aggregate base course on center
12 meters (40 feet) of taxiways and on center 30.5 meters (100 feet) of runways with eight coverages.
To all other paved areas exclusive of runway overrun and blast protection areas, apply four coverages.
8-8
Previous Page
