GR40 deformed steel bar for construction made in China
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 100000 m.t./month
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Quality Product, Order Online Tracking, Timely Delivery
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Usage and Applications of Deformed Steel Bar:
Deformed bar is widely used in buildings, bridges, roads and other engineering construction. Big to highways, railways, bridges, culverts, tunnels, public facilities such as flood control, dam, small to housing construction, beam, column, wall and the foundation of the plate, deformed bar is an integral structure material. With the development of world economy and the vigorous development of infrastructure construction, real estate, the demand for deformed bar will be larger and larger..
Packaging & Delivery of Deformed Steel Bar:
Packaging Detail: products are packed in bundle and then shipped by container or bulk vessel, deformed bar is usually naked strapping delivery, when storing, please pay attention to moisture proof. The performance of rust will produce adverse effect.
Each bundle weight: 2-3MT, or as required
Payment term: TT or L/C
Delivery Detail: within 45 days after received advanced payment or LC.
Label: to be specified by customer, generally, each bundle has 1-2 labels
Trade terms: FOB, CFR, CIF
Specifications of HRB500 Deformed Steel Bar:
Standard | GB | HRB500 |
Diameter | 6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm, 22mm,25mm,28mm,32mm,36mm,40mm,50mm | |
Length | 6M, 9M,12M or as required | |
Payment term | TT or L/C | |
Application | mainly used in construction industry to reinforce concrete structures and so on | |
Quality | First quality, the goods are from Chinese big manufacturers. | |
Type | Hot rolled deformed steel bar | |
Brand name | DRAGON | |
Chemical Composition: (Please kindly find our chemistry of our material based on HRB500 as below for your information)
Grade | Technical data of the original chemical composition (%) | ||||||
C | Mn | Si | S | P | V | ||
HRB500 | ≤0.25 | ≤1.60 | ≤0.80 | ≤0.045 | ≤0.045 | 0.08-0.12 | |
Physical capability | |||||||
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) | |||||
≥500 | ≥630 | ≥12 | |||||
- Q: How do steel rebars contribute to the durability of a structure?
- Steel rebars contribute to the durability of a structure by reinforcing and strengthening concrete. They provide structural integrity, increase resistance to bending and cracking, and enhance the overall load-bearing capacity of the building. The steel rebars help distribute the applied loads evenly throughout the structure, preventing potential failures and ensuring long-term durability.
- Q: What are the guidelines for spacing steel rebars in reinforced concrete?
- The guidelines for spacing steel rebars in reinforced concrete vary depending on several factors, such as the structural design requirements, load-bearing capacity, and the size and shape of the concrete elements. However, some general guidelines can be followed to ensure proper spacing and reinforcement in reinforced concrete structures. 1. The spacing between rebars: The spacing between steel rebars in reinforced concrete should typically be between three and six times the diameter of the bars. For example, if the diameter of the rebar is 12mm, the spacing should be between 36mm and 72mm. This spacing ensures adequate concrete cover and allows the concrete to flow freely around the reinforcement, providing optimal strength and durability. 2. Minimum spacing requirements: There are minimum spacing requirements to prevent the rebars from being too close to each other, which can lead to inadequate concrete cover and hinder the proper flow of concrete during construction. The minimum spacing between parallel bars is generally specified to be about 25mm or more. 3. Maximum spacing requirements: On the other hand, there are also maximum spacing requirements to ensure sufficient reinforcement and prevent excessive cracking or failure of the concrete structure. The maximum spacing is typically specified to be around 300mm, but it may vary depending on the specific design requirements and the size of the concrete element being reinforced. 4. Spacing around corners and bends: Special considerations should be given to the spacing of rebars around corners and bends in reinforced concrete elements. The spacing should be reduced in these areas to provide adequate reinforcement and prevent cracks or weak points. Generally, the spacing around corners and bends should be less than the recommended spacing for straight sections. 5. Spacing in heavily loaded areas: In areas subjected to heavy loads or high-stress concentrations, such as columns, beams, or foundations, closer spacing of rebars is required to provide sufficient reinforcement. The spacing in these areas is typically reduced to ensure the structural integrity and prevent failure. It is important to note that these guidelines are general recommendations, and specific projects may have their own unique requirements based on the structural design and local building codes. Therefore, it is crucial to consult with a structural engineer or follow the specifications provided by the project's design professionals to ensure proper spacing of steel rebars in reinforced concrete structures.
- Q: What is the role of steel rebars in the construction of power transmission towers?
- The role of steel rebars in the construction of power transmission towers is to provide structural reinforcement and strength to the concrete foundations and columns. Steel rebars act as a framework within the concrete, helping to distribute the load and withstand the forces exerted on the towers, including wind, seismic activity, and the weight of the transmission lines. They enhance the overall stability and durability of the towers, ensuring their ability to safely support and transmit electrical power.
- Q: What are the guidelines for the proper anchoring of steel rebars in walls?
- The proper anchoring of steel rebars in walls is crucial to ensure the structural integrity and stability of the construction. Here are some guidelines to follow for the correct anchoring of steel rebars in walls: 1. Determine the required rebar size and spacing: The size and spacing of rebars depend on the design specifications and load requirements. Consult the structural engineer or refer to the building codes for the appropriate rebar size and spacing. 2. Clean and prepare the concrete surfaces: Before anchoring the rebars, ensure that the concrete surfaces are clean, free from dust, debris, and any loose material. Use a wire brush or compressed air to remove any contaminants. 3. Use proper anchoring techniques: The most common method for anchoring steel rebars in walls is by embedding them into the concrete. Ensure that the rebars are securely embedded by following these steps: a. Drill holes: Drill holes in the concrete wall at the specified locations and depths, ensuring that the diameter of the hole matches the rebar size. b. Clean the drilled holes: Remove any dust or debris from the drilled holes using compressed air or a brush. c. Insert rebars: Insert the rebars into the drilled holes, making sure they reach the required embedment depth. d. Proper spacing: Maintain the specified spacing between rebars based on the design requirements. e. Secure rebars: Use appropriate anchoring materials like epoxy resin or grout to secure the rebars in place. Follow the manufacturer's instructions for mixing and applying the anchoring material. f. Ensure proper alignment: Verify that the rebars are correctly aligned, both horizontally and vertically, before the anchoring material sets. 4. Allow sufficient curing time: After anchoring the rebars, allow sufficient time for the anchoring material to cure. This ensures that the rebars are firmly secured in place. 5. Properly protect the rebars: Once the rebars are anchored, protect them from corrosion by applying a suitable corrosion-resistant coating or using corrosion-resistant rebars. It is essential to follow these guidelines, as improper anchoring of steel rebars can compromise the structural integrity of the walls and pose safety risks. Always consult with a qualified structural engineer or building professional for specific guidelines tailored to your project.
- Q: What are the different types of steel rebars used in road constructions?
- There are several types of steel rebars that are commonly used in road constructions. These include: 1. Mild steel rebars: These are the most commonly used type of rebars in road constructions. They are made from low carbon steel and have a smooth surface. Mild steel rebars are known for their durability and strength, making them suitable for various road construction applications. 2. High-strength rebars: These rebars are made from high-strength steel, which has a higher yield strength compared to mild steel rebars. High-strength rebars are used in road constructions where greater load-bearing capacity is required, such as in bridges and highways. 3. Epoxy-coated rebars: These rebars are coated with epoxy resin to improve their corrosion resistance. Epoxy-coated rebars are commonly used in road constructions in areas where there is exposure to moisture and chemicals, such as coastal regions. 4. Galvanized rebars: These rebars are coated with a layer of zinc to provide corrosion resistance. Galvanized rebars are particularly suitable for road constructions in areas with high humidity or where the risk of corrosion is high. 5. Stainless steel rebars: These rebars are made from stainless steel, which is highly resistant to corrosion. Stainless steel rebars are commonly used in road constructions where long-term durability and resistance to corrosion are essential, such as in tunnels and underground structures. It is important to select the appropriate type of steel rebar for road constructions based on the specific requirements of the project, including load-bearing capacity, exposure to corrosion, and environmental conditions. Consulting with structural engineers and adhering to local construction codes and standards is crucial to ensure the successful implementation of road construction projects.
- Q: How are steel rebars connected or spliced together?
- Steel rebars are typically connected or spliced together using various methods, including lap splicing, mechanical splicing, and welded splicing. Lap splicing involves overlapping the rebars and tying them together using wire or steel ties. Mechanical splicing involves using couplers or connectors to join the rebars together, providing a strong and efficient connection. Welded splicing involves welding the rebars together, creating a permanent and robust connection. The choice of splicing method depends on factors such as project requirements, structural design, and construction techniques.
- Q: Are steel rebars susceptible to stress corrosion cracking?
- Yes, steel rebars are susceptible to stress corrosion cracking, especially in aggressive environments such as chloride-rich environments or where there is a combination of tensile stress and corrosive conditions.
- Q: Can steel rebars be used in structures with limited construction technology?
- Yes, steel rebars can be used in structures with limited construction technology. Steel rebars are commonly used as reinforcement in concrete structures to enhance their strength and durability. They are versatile and can be easily incorporated into various construction techniques, making them suitable for structures with limited technology. Additionally, steel rebars offer superior resistance to load and can withstand harsh environmental conditions, ensuring the structural integrity of the building even with limited construction technology.
- Q: What are the guidelines for ensuring proper concrete cover over steel rebars?
- Proper concrete cover over steel rebars is crucial for the long-term durability and performance of reinforced concrete structures. Here are some guidelines to ensure the correct concrete cover over steel rebars: 1. Follow building codes and specifications: Building codes and specifications provide minimum requirements for concrete cover over steel rebars. These guidelines are established to ensure structural integrity, fire resistance, and resistance to corrosion. It is essential to consult and adhere to the applicable building codes and specifications for the specific project. 2. Determine the required concrete cover: The required concrete cover depends on various factors, such as environmental conditions, exposure to aggressive agents, structural design, and reinforcement type. Structural engineers typically determine the required concrete cover based on these factors to ensure the rebars are adequately protected. 3. Use appropriate concrete mix design: The concrete mix design should be carefully selected to achieve the desired strength, durability, and workability. The mix design should consider factors like the quality and size of aggregates, cement content, water-to-cement ratio, and use of additives or admixtures. Using a well-designed concrete mix will help ensure proper bonding and adequate protection of the steel rebars. 4. Maintain proper construction practices: During construction, it is crucial to maintain proper practices to ensure the correct concrete cover over steel rebars. This includes using proper formwork and reinforcement placement techniques, ensuring proper concrete placement, compaction, and curing. The rebars should be adequately positioned and securely tied to maintain the required cover and prevent displacement during concrete pouring. 5. Inspect and monitor during construction: Regular inspections and monitoring at various stages of construction are essential to ensure compliance with the required concrete cover. This includes checking reinforcement placement, cover thickness, and overall quality of the concrete. Any deviations from the specified requirements should be addressed and rectified promptly. 6. Protect against corrosion: Adequate concrete cover over steel rebars plays a significant role in protecting against corrosion. However, additional measures such as using corrosion-resistant rebars, applying epoxy coatings, or using corrosion inhibitors can further enhance the durability and longevity of the reinforced concrete structure. 7. Document and maintain records: It is important to document the construction process, including the reinforcement placement, concrete cover thickness, and any deviations or modifications made during construction. This documentation will serve as a valuable resource for future reference, maintenance, and repairs. By following these guidelines, proper concrete cover over steel rebars can be ensured, resulting in durable and structurally sound reinforced concrete structures. It is always recommended to consult with structural engineers and construction professionals for specific project requirements and to ensure compliance with local building codes and regulations.
- Q: Can steel rebars be used in foundations and footings?
- Yes, steel rebars can be used in foundations and footings. Steel rebars are commonly used to reinforce concrete structures, including foundations and footings, to provide added strength and stability. They help to prevent cracking and increase the structural integrity of the foundation or footing.
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GR40 deformed steel bar for construction made in China
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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