25 May 2005
have sulfate concentrations below 0.05 percent (by weight)
to allow use of recycled concrete as a project material.
Groundwater collected from borings within the project site
must be tested in accordance with ASTM D 516, Standard Test
Method for Sulfate Ion in Water, to determine the presence
of sulfates. Groundwater must have a sulfate concentration
below 75 ppm to allow use of recycled concrete as a project
If pavement to be recycled has experienced D-cracking, the
maximum recycled aggregate size must pass a 3/4" sieve.
Recycled concrete aggregates proposed for use shall be
evaluated and tested by the Contractor for alkali-aggregate
reactivity in accordance with ASTM C 1260. Test results
shall have a measured expansion equal to or less than 0.08
percent at 16 days after casting. Should the test data
indicate an expansion greater than 0.08 percent, the
recycled concrete aggregate shall be rejected.
Reclaimed Asphalt Pavement (RAP)
Prior approval is required from USACE-TSC, Air Force
MAJCOM, or Navy EFD for the use of Reclaimed Asphalt
Pavement in surface course. Delete the term "surface
course" unless approval is obtained.
RAP can be used in hot plant-mixed asphalt mixtures for airfield
pavement bases and intermediate courses [and surface course]. The
maximum allowable content, by weight, of RAP in the asphalt mix
is 40 percent. Use of RAP shall conform to UFC 3-250-03.
General: Recycled aggregates used in pavement mixes should be
from a single source for consistency. If materials from
different pavements and structures are to be recycled, separate
quality testing and design mixes are required for each material
source. Stockpiles of recycled aggregates from different sources
shall be separated.
AIRFIELD LAYOUT AND DESIGN
The configuration, grades, slopes, imaginary surfaces, and aircraft
clearances for airfield facilities shall meet the requirements of the
3-260-01, Airfield and Heliport Planning and Design.
Normally DOD criteria will apply to airfield paving
projects. Exceptions include projects on joint use
airfields and when DOD criteria is nonexistent for
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