New concrete up to blacktop's soft edge
I have used a segmented blade to cut asphalt with a worm drive skill saw. this was a long time back I don’t remember if it was carbide , diamond or possibly flame sprayed (I don’t know what that coating is).
when the blade got hot it smoked and I did not realize until later was filling the guard with hot tar, the blade had no problem making a similar length cut maybe a few feet longer but when my saw cooled down it was basically ruined, the tar became solid and froze my guard in place I did try for a few hours to heat and clean it but no matter how good it looked when it cooled the guard froze up. I ended up pulling the motor and tossing the guard. I have wiped out a few saws over my years and this one I did not even think would be so nasty. Just an FYI I might be inclined to purchase a garage sale special for a job like this it can do the job but I would not risk a good worm drive again.