Steel materials for use with prestressed concrete
US4661387A · kind A · utility
20Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1984 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Dec 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2947
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A prestressing steel material for use with concrete that is prestressed by posttensioning is disclosed. Said steel material is unbonded from the concrete. The prestressing steel material is composed of a steel member sheathed with a foamed synthetic resin tube. The wall thickness of the synthetic resin tube is at least 300 microns, more preferably, more than 500 microns. In the case that the steel member is a strand composed of a plurality of twisted steel wires, the spiral grooves of the strand are first filled with a resin and the strand together with the resin sheathed with the foamed synthetic resin tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.