Steel fiber reinforced concrete

Steel FIber for all sorts of concrete
Steel Fiber reinforced concrete and shotcrete

Outline

• KOREMIX is the brand name of KOREMIX CO., LTD. Steel fiber.
• KOREMIX is made of low carbon cold drawn steel wire and produced in accordance with ASTM A820 Type I.
• KOREMIX greatly improves the physical characteristics of concrete.
• It is easy to use and no special equipment are necessary in the course of mixing and pouring.

Special properties

• Koremix greatly increases fatigue resistancem, shear strength, flexibility, impact resistance and breaking strength of concrete.
• Due to aforementioned properties, the actual required thickness of concrete can be substantially reduced.
• Because of it's unique geometric shape, Koremix evenly disperses in concrete, thus improving concrete solidarity.
• In many tunnel projects, wire mesh installation is not necessary, This gives economic advantage and much faster completion of any projects
• Bundle shaped steel fiber which fiber ball does not occur when mixed with concrete materials.

Where you cna use Koremix

• Floor concrete, Airport Runways, Highways, Factory of warehouse floors where heavy equipment are handled
• Tunnel inside reinforcement (Shorcrete) and lining, Slope reinforcement, Repair and maintenance of structures
• Metal decks of steel structural buildings, Pressurized water ways, Fire resistant structures, Military facilities
• Earthquake resistant building and structures

Comparison between Koremix reinforced concrete and reqular concrete

Recommended quantities to be used for specific application of Koremix

Advantages of Koremix Reinforced Concretes

	Increase of Fatigue Stress Koremix reinforced concrete has much higher fatigue stress value and crack resistance thus minimizing cost for repair and maintenance.
	Reduction of crack width Crack width is substantially reduced when concrete is reinforced by Koremix, especially under severe conditions such as sea water structures and dock facilities.
	Increase of impact resistance By reinforcing concrete with 0.5~2 volume percent of Koremix, impact resistance can be increased by approximately 20 times. And this makes Koremix the best choice for airport runways, bridges and earthquake proof buildings.
	Effect of Koremix Length The effect of steel fiber reinforcement varies by the length and length/diameter ratio. Theoretically, steel fiber with longer and large LD ratio is better than shorter ones. However, when they are long with large LD ratio, spraying may not be easy and may not evenly disperse in concrete. We recommend 50~60mm length for floor concrete and 25~35mm for shotcrete.
	3-Dimensional Reinforcement Conventional reinforcement bars and wire mesh are basically designed for two dimensioanl reinforcement, however, Koremix enables three dimensional reinforcements.
	Electric corrosion restance Conventional reinforcement bars and wire mesh forms a continuous electric conductor and they are liable to electric corrosion due to the cathodic effect, but Koremix do not form any continuous conductor and electric corrosion is much reduced.

When concrete is reinforced by Koremix
Koremix make the concrete overcome the brittleness to ductitity, thus drastically increasing the toughness and fatigue resistance of concrete.

Effects of Koremix for various Applications

Advantages of Koremix shotcrete reinforcement

• You can forget about the fifficulties of wire mesh installation.
• Reduction of overall construction cos.
  -The thickness of concrete can be reduced down to half of regular concrete.
  - Construction period is shortened because wire mesh installation time is not necessary.

Difference between wire mesh reinforcement and Koremix Reinforcement

wire mesh reinforced	Koremix reinforced

Underground Structures

• Tunnels
  Spray concrete following the curves as it is, thus saving substantial amount of concrete. And prevents water leakage.
• Sewer lines andunderground water lines
  Thickness of lining is sunstantial reduced. Construction period is much shortened.

KOREMIX is well recognized in various construction sites such as airport runway projects, highway construction sites, tunnel reinforcement lining anf repair & Maintenance projects by quality and performances.

Sometimes reinforcement bars for the floor concrete are ot necessary and in may cases concrete pump truck is not necessary either, due to reinforcement of Koremix, and in this case the construction time can be halved.	Koremix can be conveyored in to remicon truck at the site or it can be premixed at the concrete batch plant.
Inthe Stage of Construction Construction time is hortened by simple installations. Construction cost can be saved by reduction of thickness	At the stage of maintenance Maintenance cost can be substantially reduced thanks to the long duration of Koremix reinforced concrete. Repair & maintenance works are very much simplified saving time and money.