Apparatus for forming corrosion protection coatings on prestressing strand
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United States of America Patent
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-
Nov 8, 1994
Grant Date -
N/A
app pub date -
Apr 14, 1993
filing date -
Nov 13, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a method of forming corrosion protection coatings on prestressing strands. It comprises the steps of untwisting sequential lengths of a prestressing strand; keeping the surrounding steel wires apart from the core steel wire to coat these steel wires with a synthetic resin; and twisting the coated steel wires to provide a prestressing strand of the original shape, thus permitting the separate coating of each steel wire, leaving, on the prestressing strand surface, the helical dent as deep and wide as the noncoated prestressing strand to assure the bond of the twisted wire to the surrounding concrete as firm as the noncoated prestressing strand. Also, an apparatus for carrying out such coating method is disclosed.
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