Products
EPOXY COATED AND FILLED STRAND (ECF strand)
(ASTM A882/A882M – 04, ISO 14655 1999-12-15, JSCE-E 141-2010)
- High corrosion protection
- Enough toughness at construction sites
- Excellent resistibility against fretting fatigue
With rising requirement for durability prestressed concrete structure, SEI developed the anticorrosive epoxy coated and filled strand. The strands are coated with epoxy resin which is fully filled among each wires, giving it high corrosion protection and outstanding resistibility against fretting fatigue.
| Classification of strand | JIS G3536 (Japan Industrial Standard) |
Ultra-High tensile strand | ||||
|---|---|---|---|---|---|---|
| Dia. without coating | 9.3mm | 12.7mm | 15.2mm | 15.7mm | 17.8mm | 21.8mm |
| Dia. with coating | 10.5mm | 13.9mm | 16.4mm | 16.9mm | 19.0mm | 21.8mm |
| Tensil strength | 1720N/mm2 | 1860N/mm2 | 1860N/mm2 | 2230N/mm2 | 2040N/mm2 | 2000N/mm2 |
| Characteristic ultimate force | ≥88.8kN | ≥183kN | ≥261kN | ≥335kN | ≥387kN | ≥573kN |
| Load at 0.2% permanent elongation | ≥75.5kN | ≥156kN | ≥222kN | ≥285kN | ≥330kN | ≥495kN |
| Normal cross sectional area | 51.61mm2 | 98.71mm2 | 138.7mm2 | 150.0mm2 | 190.0mm2 | 285.9mm2 |
| Unit weight | 405g/m | 774g/m | 1101g/m | 1180g/m | 1500g/m | 2244g/m |
| Relaxation | ≤6.5% | ≤2.5% * ≤6.5% |
≤2.5% * ≤6.5% |
≤6.5% | ≤6.5% | ≤6.5% |
| Thickness of epoxy coating |
Average thichness of crown part:400-900µm Each thickness of crown part:400-1200µm *In accordance with ASTM A882-04, ISO 14655-1999 and JSCE-E 141-2010 |
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※ Low relaxation type of ECF has different chemical components from JIS G3536
Lineup for ECF Strand
| Protection | Diameter mm |
Description | Appearance | Applications |
|---|---|---|---|---|
| Single Layer |
12.7-15.2 | FLO-GARDTM (Basic Type) |
 |
External cable Stay cable |
| FLO-BONDTM (High adhesion type) |
 |
Internal cable Stay cable Ground anchorage |
||
| Double Layer |
12.7-15.2 | PE tightly sheathed FLO-GARD |
 |
External cable Stay cable |
| 12.7-15.2 | PE loosely sheathed FLO-BOND |
 |
Ground anchorage | |
|
19S 15.2 27S 15.2 31S 15.2 37S 15.2 |
Semi-prefabricated FLO-GARD/FLO-BOND cable |  |
External cable Stay cable |
|
| Triple Layer |
12.7-15.2 | PE tightly sheathed and wax filled FLO-GARD |  |
External cable Stay cable |
SEMI-Prefabricated strand Cable with ECF Strand
19S 15.2
SEMI-Prefabricated strand Cable is HDPE coated multiple Epoxy coated and filled strand. It is prefabricated with certain length adjustability and results in very short erection time on site.
| Size | 19S 15.2 | 27S 15.2 | 31S 15.2 | 37S 15.2 |
|---|---|---|---|---|
| Normal diameter [mm] | 95 | 115 | 120 | 130 |
| HDPE thickness [mm] | 5.0 | 5.0 | 5.5 | 7.0 |
| Min. Breaking strength [kN] | 4,959 | 7,047 | 8,091 | 9,657 |
| Min. Yield strength [kN] | 4,218 | 5,994 | 6,882 | 8,214 |
| Cross-sectional area [mm2] | 2,635.3 | 3,744.9 | 4,299.7 | 5,131.9 |
| Mass of Strand [kg/m] | 24 | 36 | 40 | 48 |
Coating performance of ECF Strand
Bending characteristics of coating
The coating develops no abnormalities even under severe conditions: such as, when would around a cylinder mandrel with a diameter 32 times that of the strand diameter.
Adhesion and continuity of coating under tensioning
The coating follows the steel wire and maintains continuity up until the wire breaks. Even after breakage, the coating demonstrates uniform behavior with the steel wire.
Comparison with Conventional Strands in 1000 hours in salt spray test
Can be anchored from directly above the coating with an anchorage
Wedge for ECF Strand
Condition of ECF strand and an exclusive wedge after loading up to rated tension load.
It is possible to bite through the epoxy coating into steel directly.
