First you need to determine why it has risen, check for tree roots, if these can be removed, you might be lucky and the concrete will settle back to correct height. If you do not find and fix the reason for the concrete rising, the new or repaired pad may do the same thing. A neighbor had a palm tree cause their driveway to start rising, they took out the tree. The driveway appears to be back to normal height.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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