| 摘要 |
<p>A waterstop having a body comprising an elongate web (10) with a keying formation (11) at or near each edge of the web (10) by which the waterstop may be secured in adjacent respective bodies of concrete so as to seal the gap between such bodies, and, on each side of the centre line, a strip of water swellable material (20) attached to the body and positioned so as to engage the concrete and effective in use to improve the seal between the waterstop and concrete in the event of water or moisture penetration.</p> |
