A follow up:
After looking at this pile of asphalt for several years, and not seeing a practical solution, I decided to try something, anything. The pile was probably dumped straight from a dump truck and not rolled and compacted. If you attacked it with an FEL like your supposed to use an FEL it was like hitting a giant rock. However I found that if I turned my bucket to point straight down, lowered the FEL onto the pile until the front wheels were off the ground, putting the entire weight of the front end of the tractor on the leading edge of the FEL, then backed up a few feet; it make a horrible screeching, scraping sound, but would pulverize the asphalt. I know this will be considered by many as inappropriate, horrible, unacceptable abuse of my FEL, but it worked surprisingly well! It took literally hundreds and hundreds of small bits and an entire day to pulverize the entire pile into what equals a dump truck full of heavily oiled, fine gravel. The Branson FEL stood up well and I can't see that it damaged anything at all. Yesterday I spread the pulverized asphalt out on my 1/4 mile of driveway where it should make a good road material. Today I still need to go out drag the drive with my chain harrow to mix it with the gravel, and pick up the larger pieces that didn't pulverize, but there really aren't that many large pieces. I am so glad to have that ugly pile of asphalt finally gone!