steel fiber for concrete, ASTM A820 steel fiber

Overview of steel fiber for concrete, ASTM A820 steel fiber

Concrete fibers, also known as fiber-reinforced concrete (FRC), are a type of composite material where discrete fibers are uniformly dispersed throughout a concrete matrix to improve its mechanical properties and performance. These fibers can be made from various materials, including synthetic polymers, steel, glass, and natural substances like cellulose, each offering unique benefits to the concrete mix. The primary purpose of incorporating fibers into concrete is to enhance its tensile strength, resistance to cracking, impact resistance, and durability, making it suitable for applications where traditional plain concrete may be insufficient.

Features of steel fiber for concrete, ASTM A820 steel fiber

1. Improved Crack Resistance: Fibers act as micro-reinforcements that hinder crack propagation, resulting in reduced crack widths and improved overall integrity.

2. Increased Toughness: The addition of fibers boosts the material's toughness, or ability to absorb energy without fracturing, making it more resistant to impacts and vibrations.

3. Enhanced Durability: By controlling crack formation, fibers protect concrete from aggressive chemicals and water ingress, prolonging its service life.

4. Three-Dimensional Reinforcement: Unlike conventional rebar, fibers distribute reinforcement in all directions, providing comprehensive support within the concrete mass.

5. Ease of Placement: Fiber-reinforced concrete can be poured, sprayed, or cast just like regular concrete, often without the need for additional reinforcement steps.

(steel fiber for concrete, ASTM A820 steel fiber)

Parameters of steel fiber for concrete, ASTM A820 steel fiber

ASTM A820 is a standard specification for high-strength low-alloy steel fibers used in the production of concrete. The following parameters are commonly used for A820 steel fibers: 1. Composition: Steel fibers should be made from high-strength，3.6%～5.0%0.4%～1.7%。 2. diameter: Steel fibers should have a diameter range of 0.9 mm to 5 mm. 3. tensile strength: Steel fibers should have a tensile strength of at least 550 MPa. 4. modulus of elasticity: Steel fibers should have an elastic modulus of at least 30 GPa. 5. yield strength: Steel fibers should have a yield strength of at least 400 MPa. 6. density: Steel fibers should have a density between 7 g/cm³ and 10 g/cm³. These parameters determine the strength, elongation, and toughness of the steel fibers used in concrete construction. It's important to choose the appropriate size and type of steel fibers based on the specific requirements of your project.

(steel fiber for concrete, ASTM A820 steel fiber)

Applications of steel fiber for concrete, ASTM A820 steel fiber

1. Industrial Flooring: In warehouses, factories, and parking lots where high abrasion resistance and durability are crucial.

2. Concrete Pavements: Highway overlays, airport runways, and sidewalks benefit from increased resistance to rutting, fatigue cracking, and thermal stresses.

3. Pre-cast Elements: Manufacturing of concrete blocks, panels, and other precast products where improved toughness and crack control are required.

4. Shotcrete: In mining, tunneling, and slope stabilization projects where rapid application and high early strength are essential.

5. Concrete Repair and Retrofitting: Strengthening of existing concrete structures, patching, and rehabilitation works where reinforcement enhancement is needed.

Company Profile

Cie-China is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality concrete additives and relatives products.

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Shipment

It could be shipped by sea, by air, or by reveal ASAP as soon as repayment receipt.

FAQs of steel fiber for concrete, ASTM A820 steel fiber

Q: Does steel fiber for concrete, ASTM A820 steel fiber replace steel reinforcement in concrete completely? A: No, fibers complement rather than replace steel reinforcement. While they significantly improve the concrete's tensile strength and crack resistance, major load-bearing structures still require steel reinforcement for structural integrity.

Q: How is steel fiber for concrete, ASTM A820 steel fiber added to concrete? A: steel fiber for concrete, ASTM A820 steel fiber is typically added directly to the concrete mixer during the batching process to ensure uniform distribution throughout the mix.

Q: Which type of steel fiber for concrete, ASTM A820 steel fiber is best for my project? A: The choice depends on the specific application's requirements. Steel fibers provide high tensile strength, synthetic fibers are cost-effective for crack control, while glass fibers offer excellent chemical resistance.

Q: Does steel fiber for concrete, ASTM A820 steel fiber addition affect the concrete's weight or density? A: The effect is generally minimal. While fibers add negligible weight, the overall density of fiber-reinforced concrete is comparable to plain concrete.

Q: Is fiber-reinforced concrete more expensive? A: Cost varies depending on the type and quantity of fibers used. While initially more costly than plain concrete, the reduced maintenance and longer lifespan often justify the investment.

(steel fiber for concrete, ASTM A820 steel fiber)