Steel Fiber

Steel fiber is a concrete reinforcing material processed to small steel line with 30～60㎜ of length and 0.5～1.0㎜ of wire diameter, which is a product produced for improving and reinforcing dynamic behavior and physical features such as tensile strength, flexural strength, and resistance against crack by dispersing and mixing with concrete

Ultra Fiber

Ultra Fiber is a unique brand of steel fiber produced by Daein.

The bonding strength with concrete is high due to a high aspect ratio.
The both hook-shaped ends of this product strengthen flexibility, impact resistance and bending strength of concrete, which increases the toughness and fatigue resistance of concrete to improve the anti-cracking effect.
As this product is made in a bundle, it is evenly dispersed without fiber-balling while mixing with concrete.

Product Specification

Product	Bundled /loose	Length	Diameter	Aspect (length/diameter) ratio	Tensile Strength (N/mm²)	Dosage (kg/㎥)	PCS per Unit (fibres/kg)	Application
UF 55/30 NP	glued	30	0.55	55	1,250	25	14,700	shotcrete, precast
UF 65/35 NP	glued	35	0.53	66	1,250	25	14,700	shotcrete, precast
UF 75/40 NP	glued	40	0.55	75	1,250	20	12,500	shotcrete, precast
UF 55/35 NP	glued	35	0.63	55	1,250	25	12,000	shotcrete, precast
UF 55/30 NP	glued	30	0.55	55	1,250	25	15,200	shotcrete, precast
UF 80/60 NP	glued	60	0.75	80	1,150	20	4,600	industrial floor(SOG, SOP), Compression layers, Segment for tunnel lining
UF 80/60 HP	glued	60	0.75	80	1,500	20	4,600	industrial floor(SOG, SOP), Compression layers, Segment for tunnel lining
UF 65/60 NP	glued	60	0.90	65	1,050	20	3,200	industrial floor(SOG, SOP), Compression layers, Segment for tunnel lining
UF 65/60 HP	glued	60	0.90	65	1,500	15	3,200	industrial floor(SOG, SOP), Compression layers, Segment for tunnel lining

Applications of Steel Fiber

Division	Steel fiber reinforced concrete (SFRC)	Steel fiber reinforced shotcrete (SFRS)
Features	This is steel fiber-reinforced concrete mixed with steel fiber of 0.5~1.0mm in diameter and 30~60mm in length, which is more than 2 times, 2 to 3 times and 10 times as strong as regular concrete in tensile strength, bending strength and impact resistance.	In Korea, steel fiber-reinforced shotcrete mixed with steel fiber of 0.5~0.6mm in diameter and 30~40mm in length is used for tunneling. Its physical properties are the same as SFRC
Usage	Stadiums, distribution warehouses, express ways, runways, tracks, shopping centers, bridge decks, soil walls, companies dealing with heavy loads per unit area, steel fireproof facility construction, high strength concrete(hume pipes, precast septic tanks), earthquake- proof facilities, nuclear power plant presure vessels, high-level security building construction, military facilities, dam-related spilways, race ways, explosion-proof structures, off-shore structures.	Reservoirs, dams, repairing and reinforcement lining work, subway/reilroad/expressway/road tuneling work, structure recovery and repairing work, earthquake-resistant walls, underground space
How to Use	Wire diameter: 0.6~1.2mm, wire length: 50~60mm, water-cement ratio: 55% or less, the minumum size of fine aggregate:1/2 of steel fiber, fine aggreagte ratio: 50~70%, slump: 10~12, the amount of concrete: 420~500kg/㎥, stel fiber consumption: 20kg/㎥ or more.	Wire diameter: 0.5~0.55m, wire length: 30~35mm, water-cement ratio: 50% or less, the maximum size of fine aggregate: 13mm, slump: 10~12, the amount of concrete: 420~500kg/㎥, steel fiber consumption: 40kg/㎥, the length of steel fiber: 70% or less of the nozzle size.
Input Order	Coarse aggreagte → fine aggregate → sand → steel fiber (mix for 15~30 seconds) → cement and water (mixer line / batch plant line)	Operate the mixer at the highest rpm → input/mix steel fiber → 2~3 minutes at the highest rpm of the mixer. (Concrete mixer)

SF Burnish Floor System

This new methood for salbs of steel fiber reinforced concrete(SFRC), which replaces reinforcing bars with steel fiber in the existing reinforced concrete(RC) slab structure, uses the finishing method where the laser system is used to improve the flatness of a slab and the surface strength of concrete is maximized without separate finishing materials(Burnish).

Features of Ultra Fiber Reinforced Slabs On Grade

Larger load-bearing ability due to uniform 3D reinforcement of slab
The thickness of slabs can be reduced compared with the existing reinforcement methods. (Reinforced rods or wire meshes)
The possibility of cracks is remarkably reduced
The impact and fatigue strength are high

Labor costs and construction period can be reduced due to simplified construction processes.
Maintenance costs can be reduced
The flatness of slabs can be improved by the use of the laser system.
A separate finishing process is unnecessart due to high abrasion resistance on the slab surface