Unbonded PC steel strand

Details Unbonded PC steel strand Unbonded PC steel strand

1985-11-18

1987-01-13

Watkins, Donald

Textiles: spinning, twisting, and twining

Strand structure

Covered or wrapped

57 7, D07B 116, D07B 114

Patent

active

046354336

ABSTRACT:
An unbonded PC steel strand used for posttensioning concrete comprising a PC steel strand composed of a plurality of stranded wires, a zinc plated layer on the outer surface of the PC steel strand, a greaselike filler applied around the zinc plated layer, and a synthetic resin sheath covering the zinc and filler coated PC steel strand. A method of manufacturing the unbonded PC steel strand comprising steps of pickling and water washing the PC steel strand, coating the outer surface of the PC steel strand with flux, plating the outer surface of the PC steel strand with zinc, applying a greaselike corrosion inhibitor to the surface of the zinc plated layer and sheathing the PC steel strand with an outer synthetic resin sheath.

REFERENCES:
patent: 3646748 (1972-03-01), Lang
patent: 3899384 (1975-08-01), Kelly
patent: 3922437 (1975-11-01), Kitta et al.
patent: 3988884 (1976-11-01), Kikugawa
patent: 4445321 (1984-05-01), Hutchinson

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