TM 5-822-10/AFM 88-6, Chap. 6
d. Step 4. Conduct a penetration test on the recovered asphalt. A penetration test on the asphalt recovered from the
in-place asphalt mixture indicated that the asphalt penetration was 10 percent. The target penetration for this example
(mild climate) is 50. Because of the low penetration, it will be necessary to use a low-viscosity asphalt cement AC-2.5)
and possibly an asphalt recycling agent.
e. Step 5. Prepare a set of samples with various asphalt contents with no recycling agent and a set of samples at
various asphalt contents with 0.5 percent recycling agent. The added asphalt content should be varied from 2.5 to 4.0
percent for the samples with no recycling agent and from 1.5 to 3.0 percent for the samples with 0.5 percent recycling
agent. Figure B-3 shows the properties of the mixtures with various added asphalt contents and 0.5 percent recycling
agent. Figure B-4 shows the properties of the mixtures at various asphalt contents with no recycling agent.