25 May 2005
Cold-mixed RAP is not allowed for an airfield pavement base.
Pavement Recycling Constraints
RCA that has experienced D-cracking must be crushed to a maximum
aggregate size that will pass a - in. sieve (AFM 88-6, Chapter 6).
Special care must be taken with the use of RCA to eliminate sulfate
problems (UFC 3-260-02).
RCA must meet gradation and durability requirements for the use
intended (UFC 3-250-04FA).
RCA should come from a single source within the project to assure
consistency. RCA from structures should not be mixed with RCA from
pavement. The use of recycled building debris is not permitted
3-220.127.116.11 RAP. The use of RAP for surface courses is not recommended by either
the Army or the Air Force (UFC 3-250-03). The amount of RAP used in hot-mix asphalt
can vary from 10 percent to a maximum of 40 percent (UFC 3-250-03).
New Pavements. Rigid runway pavements should be finished with a
burlap (or fabric) drag and be grooved. Army and Air Force asphalt runway pavements
should be grooved. Grooving for Navy asphalt pavement will be evaluated on a case-
by-case basis. The grooving requirements shall be stated in the RFP. Helicopter
runways should not be grooved. See UFC 3-260-02 for information on runway areas to
be grooved and grooving details.
Existing Pavements. Re-texturing or rubber removal can be used to
improve the skid resistance of existing pavements. Contact USACE-TSC, Air Force
MAJCOM, or Navy EFD for guidance.
Drainage Criteria. All airfield pavements will
be constructed with drainage
layers except in the following two conditions:
Pavements in non-frost areas with a subgrade permeability greater
than 6 m (20 ft) per day do not require drainage layers.
Flexible pavements in non-frost areas with a pavement thickness
above the subgrade of 200 mm (8 in.) or less do not require drainage