Steel materials for use with prestressed concrete
US4643929A · kind A · utility
8Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Dec 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Prestressing steel materials are disclosed for use with concrete that is prestressed by posttensioning, said steel material being unbonded from the concrete. The steel materials are composed of steel members sheathed with a heat-shrinkable synthetic resin tube. Preferably, the wall thickness of the resin tube is at least 300 microns. In the case of a steel strand composed of a plurality of twisted steel wires, spiral grooves of the strand are filled with a resin and then the strand and resin are sheathed with a heat-shrinkable synthetic resin tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.