Does soil processed with T-RRP become strong of its own accord?
No, it does not; but you can correctly pull it the other way around: Once it has been given optimum compaction, soil processes with T-RRP will never loosen its texture again under the action of water or frost! The effect of T-RRP in the soil manifests itself only after compaction (by rolling). The roller and more particularly the optimum compaction produced by it is the most important feature of the whole T-RRP construction method.
