PREGROUTED PC STEEL AND METHOD FOR HARDENING PREGROUTED LAYER

Title:

PREGROUTED PC STEEL AND METHOD FOR HARDENING PREGROUTED LAYER

Document Type and Number:

WIPO Patent Application WO/2015/098683

Kind Code:

A1

Abstract:

Pregrouted PC steel (10) that has a 19-wire PC steel wire strand (1), a pregrouted layer (2) disposed on the outer circumference thereof, and a sheath (3) covering the outer circumference of the pregrouted layer (2), is filled with fill resin (4) between each steel wire (side wire) (1b, 1c, 1d). Because the fill resin (4) does not exude to the pregrouted layer (2) side before tensioning of the PC steel wire strand (1), the tensioning work of the PC steel wire strand (1) is not impeded due to the hardening of the pregrouted layer (2). Meanwhile, because the gaps between the steel wires are reduced when the PC steel wire strand (1) is under tension, due to the reduction, for the first time the fill resin (4) flows out (exudes) from between the steel wires into the pregrouted layer (2) and then hardens the same.

Inventors:

OSHIMA KATSUHITO (JP)
YAMADA MASATO (JP)
MATSUBARA YOSHIYUKI (JP)
MATSUSHITA KIMINORI (JP)
TANAKA SHUICHI (JP)
SUGAWARA JUN (JP)
NAKAJIMA SHINGO (JP)

Application Number:

PCT/JP2014/083527

Publication Date:

July 02, 2015

Filing Date:

December 18, 2014

Export Citation:

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Assignee:

SUMITOMO SEI STEEL WIRE CORP (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

E04G21/12; B28B23/04; E04C5/08

Domestic Patent References:

WO2014021056A1

2014-02-06

Foreign References:

JP2012154097A	2012-08-16
JPH0538818B2	1993-06-11
JP2009108497A	2009-05-21
JP2008255183A	2008-10-23
JP2003172001A	2003-06-20
JP2000281967A	2000-10-10
JP2009108497A	2009-05-21
JP2007211486A	2007-08-23
JP2012154097A	2012-08-16
JPH05200825A	1993-08-10

Other References: