| 摘要 |
<p>A composite material for uses including stay cables and prestressing concrete comprises high strength wire strand coated and impregnated with an impermeable and strongly adherent epoxy based resin. Impregnation and coating are effected by passing a fully formed, cleaned, and heated strand (2) through a known electrostatic powder coating line (6) modified to include a mechanism (5) for temporarily opening successive sections of the strand such that the strand (2) passes into the coating line in an opened state, and the strand wires (12 and 13) are coated with a fused thermosetting epoxy resin before the strand (2) is reclosed, the resin filling the interstices in the reclosed strand (2a). The strand opening mechanism (5) includes a rotatable template (19) with wire guides (19a) for leading the outer spiraled wires (13) of the strand (2) temporarily away from the center wire (12).</p> |
