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<p>and the tendon-stressing ends sealed against <a href="page.php?w=corrosion">corrosion</a>.</p>

<p><big>Unbonded post-tensioning</big></p>
<p>Unbonded post-tensioning differs from bonded post-tensioning by allowing the tendons permanent freedom of <a href="page.php?w=Geometric_terms_of_location">longitudinal</a> movement relative to the concrete. This is most commonly achieved by encasing each individual tendon element within a plastic sheathing filled with a <a href="page.php?w=corrosion">corrosion</a>-inhibiting <a href="page.php?w=Grease_%28lubricant%29">grease</a>,</p><p>
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