• Low Carbon Steel Fiber System 1
  • Low Carbon Steel Fiber System 2
  • Low Carbon Steel Fiber System 3
Low Carbon Steel Fiber

Low Carbon Steel Fiber

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Low Carbon Steel Fiber


CNBM low carbon steel fiber is used as a replacement for traditional  reinforcement in various concrete  applications  such  as:  slab-on-ground, precast and shotcrete. With CNBM carbon steel fibers you can limit micro-cracking,  expect  excellent concrete strength and lower costs.


Excellent for major flooring projects, precast, shotcrete, highways, airports, and bridge decks. Straight, Continuously Deformed and End Deformed Design. For matchless purity, uniformity, performance and price, no one beats the CNBM product line!

Production:
A low carbon, cold rolled sheet steel is used to produce CNBM  product for concrete applications.  This steel has ultimate  tensile strengths from 50 to 120 ksi (345 to 828 MPa) and has sufficient ductility actually to permit 180° bends without rupture. Various stainless steel grades are used for the reinforcement of refractory concretes. Information on these grades for high-temperature applications is available upon request. CNBM low carbon steel fiber  has more reinforcing elements per pound of product than any of its competitors. There are nominally 21,000 3/4" and 16,000 1" straight fibers per pound, as well as 9,000 1" (254mm) deformed fibers per pound.

Catastrophic failure of concrete is virtually eliminated because the fibers continue supporting the load after cracking occurs. And while measured rates of improvement vary, CNBM reinforced concrete exhibits higher post-crack flexural strength, better crack resistance, improved fatigue strength, higher resistance to spalling, and higher first-crack strength. Figure 2 shows concrete flexural strengths when reinforced at various fiber proportions. Additionally, CNBM deformed fibers provide a positive mechanical bond within the concrete matrix to resist pull-out.

When CNBM fibers  are added to mortar, Portland cement concrete or refractory concrete,  the flexural strength  of the  composite  is increased from 25% to 100% -depending on the proportion of fibers added and the  mix  design. CNBM  technology actually transforms a brittle material into a more ductile one.

Sizes:
CNBM low carbon steel fibers are available in lengths from 0.50" (13mm) to 2.0"  (50mm) and aspect ratios  between 40 and 60.  The fibers are manufactured either straight or deformed, and conform to ASTM A-820.


Mechanical Properties

SFRC-0

SFRC-1.0

SFRC-1.5

SFRC-2.0

Compressive strength Compressive strength(MPn)

43.6

49.8

51.2

55.3

100%

114.20%

117.40%

126.80%

Chop adn tension strength(MPn)

3.74

4.89

5.7

6.58

100%

129.90%

152.40%

175.90%

Bending strength with initial cracks(MPn)

5.18

6.98

7.78

8.94

100%

134.70%

150.20%

172.60%

Max.anti-deformation(MPa)

5.6

9.4

10.7

13.9

100%

167.80%

191.10%

248.20%

Toughness with initial cracks(Nmm)

185.2

394.1

832.1

1161.1

100%

212.80%

449.30%

627.00%

Application in projects

Project Type

Length(mm)

Diameter(equilavent diameter mm)

Length/Diameter

Ordinarily laid steel fiber concrete

20-60

0.3-0.9

30-80

Steel fiber injected concrete

20-35

0.3-0.8

30-80

Steel fiber concrete with earthquake resistant frame joints

35-60

0.3-0.9

50-80

Steel fiber concrete railway sleeper

30-35

0.3-0.6

50-70

Laminated steel fiber concrete complex road surface

30-120

0.3-1.2

60-100


Recommendations for construction technology
1.Grade of cement should be not less than NO.425 and the ratio of water and mortar should not be more than 0.5.

2.The length of coarse material particles should not exceed 2/3 of that of steel fiber.

3.The mass of the steel fiber in steel fiber concrete should not be less than 0.5% and normally it is to be selected between 0.5%-2.0%.

4.Sea water and sea sand shall not be used for making blocking steel fiber concrete and then addition of chlorate is strictly prohibited.

5.Inaddition, other materials to be used together for steel fiber concreate shall be in accordance with the specifications of the existing standards in relation to reinforced concrete.

6.The viscosity of steel fiber concrete can be determined based on the requirements of normal engineering projects for common concrete. The value of its subside can be 200mm less than common concrete and its viscosity is the same as common concrete.

7.If there is no base material under the surface layer and the bottom layer for the shrinking seams as flat seams and if it is in accordance with the following conditions, then:

1.The thicknessof the surface layer and the bottom layer before the reduction is less than 130mm:2.The  thickness of the reinforced base layer is more thant that of the bottom layer,then the thickness can time the reduction coefficient 0.75,but not more than 50mm.

Requirements for loading of materials
1.Steel fiber and other coarse materials are first put into a mixer and stirred for 30 seconds so that steel fiber shall be dispersed in the gravels to avoid agglomeration.

2.Sand and concrete is then put into a mixer for 30 second of dry stirring.

3.Water is then added into the rotating mixer with about 3 minutes of further stirring.

Packing of products:
The packing can be either in paper cartons in an orderly manner or paper bags in an optional way based on customers’ requirement. The first is with a small volume and it is not easy to agglomerate and so it can be used by adding it directly into other materials thus reducing the cost of equipment and transportation for customers.


Q: What are the different types of steel wires and their applications in the telecommunications industry?
There are several types of steel wires used in the telecommunications industry. Some common ones include galvanized steel wires, aluminum clad steel wires, and stainless steel wires. Galvanized steel wires are coated with a layer of zinc, which provides corrosion resistance. They are commonly used for overhead transmission lines and communication cables. Aluminum clad steel wires are made by covering a steel core with a layer of aluminum. These wires combine the strength of steel with the light weight and conductivity of aluminum. They are often used in the construction of overhead power lines and telecommunication cables. Stainless steel wires are known for their high strength and resistance to corrosion. They are used in the telecommunications industry for applications that require durability and reliability, such as guy wires for cell towers and suspension cables for overhead lines. Overall, steel wires play a crucial role in telecommunication infrastructure, providing support, strength, and conductivity for various applications in the industry.
Q: How are steel products used in the railway industry?
Steel products are used extensively in the railway industry for various purposes such as constructing tracks, bridges, and tunnels, manufacturing train components like locomotives and rolling stock, and providing structural support to the infrastructure.
Q: What are the different types of steel pipes and tubes available?
There are various types of steel pipes and tubes available, including seamless pipes, welded pipes, ERW (Electric Resistance Welded) pipes, LSAW (Longitudinal Submerged Arc Welded) pipes, SSAW (Spiral Submerged Arc Welded) pipes, and galvanized pipes. These types differ in their manufacturing processes, applications, and specific characteristics, offering options for different industries and purposes.
Q: How is steel wire rope used in elevators?
Steel wire rope is used in elevators to provide the necessary strength and support for lifting heavy loads. It is typically used as the main hoisting cable, ensuring smooth and safe vertical movement of the elevator car. The steel wire rope is highly durable and can withstand the constant stress and tension experienced during elevator operation, making it an essential component in ensuring the reliability and safety of elevators.
Q: How does steel sheet metal bending and forming work?
Steel sheet metal bending and forming works by applying force to the metal sheet, causing it to deform and take the desired shape. This is achieved through various methods such as press brakes or rollers, which exert pressure on the sheet to create bends, curves, or other desired forms. The process may involve multiple steps, including pre-bending, bending, and post-bending operations, to achieve the desired final shape.
Q: How are steel coils used in manufacturing processes?
Steel coils are used in manufacturing processes in various ways. They are commonly used in industries such as automotive, construction, and appliances. The coils are often unwound and fed into machinery to create different products, such as sheet metal for car bodies, structural components for buildings, or parts for household appliances. The versatility and strength of steel make it a popular choice in manufacturing, and steel coils play a crucial role in transforming raw materials into finished goods.
Q: How are steel pipes used in the transportation of chemicals?
Steel pipes are commonly used in the transportation of chemicals due to their strength, durability, and resistance to corrosion. These pipes are used to safely transport various types of chemicals, such as acids, solvents, and corrosive substances, from one location to another. The steel material provides a reliable and secure conduit for the chemicals, preventing leaks or contamination during transit. Additionally, steel pipes can withstand high pressure, making them suitable for transporting chemicals over long distances.
Q: How do steel products contribute to the oil and gas industry?
Steel products play a crucial role in the oil and gas industry by being used in various applications such as pipelines, drilling equipment, storage tanks, and offshore platforms. The durability, strength, and corrosion resistance of steel make it ideal for these demanding environments, ensuring the safe and efficient extraction, transportation, and storage of oil and gas resources.
Q: What are the applications of alloy steel in the manufacturing of heavy machinery?
Alloy steel finds several applications in the manufacturing of heavy machinery due to its superior strength, durability, and resistance to corrosion and wear. It is commonly used in the production of components such as gears, shafts, axles, and structural frames, where high strength and toughness are essential. Additionally, alloy steel offers excellent heat resistance, making it suitable for parts exposed to extreme temperatures and harsh operating conditions. Overall, the use of alloy steel in heavy machinery manufacturing ensures enhanced performance, increased lifespan, and improved reliability of the equipment.
Q: What are the different types of steel sheets and their uses in the construction of prefabricated buildings?
There are several types of steel sheets commonly used in the construction of prefabricated buildings. One of the most common types is cold-rolled steel sheet, which is durable, lightweight, and easy to work with. Another type is galvanized steel sheet, which is coated with a layer of zinc to protect against corrosion. Galvanized steel is often used in outdoor applications or in areas with high moisture levels. Additionally, there are also stainless steel sheets, which are highly resistant to corrosion and offer excellent aesthetic appeal. These sheets are often used in areas where hygiene and cleanliness are of utmost importance, such as hospitals or food processing facilities. Ultimately, the choice of steel sheet will depend on factors such as the building's location, purpose, and desired durability.

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