| 摘要 |
A composite structural element (10) includes one or more tyre tread portions (16) encapsulated in a casing (14) preferably formed from a settable liquid, and being of a rigidity sufficient for said tread portions (16) to be held substantially straight by the casing and is adhesively engaged with the tread portions. The method of forming the composite structural element (10) includes removing the tread portion from a tyre, cutting the thread portion at least once across its tread, forming or holding the cut tread portion substantially straight, encapsulating the straightened tread portion in a settable liquid, and allowing or causing the settable liquid to set to form the casing with the straightened tread portion encased therein.
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