GALVANIZED PRESTRESSING STEEL STRAND WITH LOW RELAXATION, MANUFACTURING METHOD THEREFOR AND MANUFACTURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a galvanized prestressing steel strand with low relaxation, of which the galvanized layer has no streak or unbalanced thickness peculiar to a strand, has strengthened adhesion to concrete and has resistance to drawing, and of which each strand and the whole strand has superior corrosion resistance, and provide a manufacturing method therefor, and a manufacturing apparatus. ;SOLUTION: This galvanized prestressing steel strand has a galvanized layer 3 with a coating weight of 70-700 g/m² on each strand 2 having a desired strand shape, which is formed by electroplating, while the strand is slightly loosened and is tightened again into the above strand shape.;COPYRIGHT: (C)2003,JPO