Yes, Bachmann's track can be separated from the roadbed fairly easily. IIRC, there a at least 3 small screws holding the roadbed to the track, per section of track. In my mind, if you're going to use sectional track for radius greater than 24", you're stuck with Bachmann's brand of track. At one time, they also sold their track in 22", 24", 26", 28" 30", 32", 33", 34" and 36" radius.
A traveling hobby shop that I worked shows for several years ago, sold this track in those radius, and I kept meaning to get some 36" for use as a break-in track for my locos, but never bothered.