Reinforcing Deformed Steel Bars in Grade HRB400
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 20000 m.t./month
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Specification
Standard:
GB
Technique:
Hot Rolled
Shape:
Round
Surface Treatment:
Black
Steel Grade:
HRB400
Thickness:
6-32mm
Length:
12m/pc
Net Weight:
2mt/bundle
OKorder is offering high quality Hot Rolled Rebars at great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to Africa, North American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
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.
Product Advantages:
OKorder's Hot Rolled Rebars are durable, strong, and resist corrosion.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Corrosion resistance
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
Manufacture: Hot rolled
Grade: HRB400 – HRB500
Certificates: ISO, SGS, BV, CIQ
Length: 6m – 12m, as per customer request
Packaging: Export packing, nude packing, bundled
Grade | Technical data of the original chemical composition (%) | ||||||
C | Mn | Si | S | P | V | ||
HRB400 | ≤0.25 | ≤1.60 | ≤0.80 | ≤0.045 | ≤0.045 | 0.04-0.12 | |
Physical capability | |||||||
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) | |||||
≥400 | ≥570 | ≥14 | |||||
Theoretical weight and section area of each diameter as below for your information:
Diameter(mm) | Section area (mm²) | Mass(kg/m) | Weight of 12m bar(kg) |
6 | 28.27 | 0.222 | 2.664 |
8 | 50.27 | 0.395 | 4.74 |
10 | 78.54 | 0.617 | 7.404 |
12 | 113.1 | 0.888 | 10.656 |
14 | 153.9 | 1.21 | 14.52 |
16 | 201.1 | 1.58 | 18.96 |
18 | 254.5 | 2.00 | 24 |
20 | 314.2 | 2.47 | 29.64 |
22 | 380.1 | 2.98 | 35.76 |
25 | 490.9 | 3.85 | 46.2 |
28 | 615.8 | 4.83 | 57.96 |
32 | 804.2 | 6.31 | 75.72 |
36 | 1018 | 7.99 | 98.88 |
40 | 1257 | 9.87 | 118.44 |
50 | 1964 | 15.42 | 185.04 |
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered by OKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4:What's your payment terms ?
A4:Mostly,we collect the money by T/T and LC at sight . We also accept time LC at 90/120 days sight.
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- Q: How do steel rebars affect the environmental sustainability of a structure?
- Steel rebars can have both positive and negative impacts on the environmental sustainability of a structure. On one hand, steel rebars are a sustainable choice as they are made from recycled materials. Steel is one of the most recycled materials in the world, which helps in reducing the demand for virgin resources and the associated environmental impacts of extraction and processing. Additionally, steel rebars are highly durable and have a long lifespan, which means that structures reinforced with steel rebars require less maintenance and replacement over time. This reduces the overall environmental impact associated with the construction and demolition of structures. On the other hand, the production of steel rebars has some negative environmental consequences. The manufacturing process involves high energy consumption, carbon emissions, and the release of pollutants into the atmosphere. The extraction and processing of iron ore, as well as the conversion of iron into steel, can contribute to deforestation, air and water pollution, and habitat destruction. However, the negative impacts of steel rebars can be mitigated through sustainable manufacturing practices. For example, using energy-efficient technologies, utilizing renewable energy sources, and implementing strict emissions controls can help reduce the environmental footprint of steel production. Moreover, the environmental sustainability of a structure also depends on the overall design and construction practices. By adopting sustainable design principles, such as optimizing the use of materials, minimizing waste, and incorporating energy-efficient features, the negative impacts of steel rebars can be further reduced. In conclusion, while steel rebars have some negative environmental impacts in their production process, their use in construction offers several sustainability benefits such as recycling, durability, and reduced maintenance needs. By adopting sustainable manufacturing practices and integrating them into environmentally conscious design and construction practices, the overall environmental sustainability of structures can be greatly enhanced.
- Q: How do steel rebars contribute to the load-bearing capacity of concrete slabs?
- The load-bearing capacity of concrete slabs is improved through various mechanisms by steel rebars. Firstly, they increase the tensile strength of the concrete. While concrete is renowned for its compressive strength, it lacks the ability to resist tensile forces. By incorporating steel rebars into the concrete, a reinforced structure is formed, capable of withstanding both compressive and tensile stresses. This effectively prevents the concrete from cracking or failing when subjected to heavy loads. Secondly, steel rebars aid in the even distribution of loads across the concrete slab. When a load is applied to the slab, it tends to concentrate at specific points, leading to stress concentrations. However, the presence of rebars facilitates the spreading of the load over a larger area, reducing stress on individual points and enhancing the overall load-bearing capacity of the slab. Additionally, steel rebars serve as a barrier against crack propagation in concrete slabs. If a crack occurs, the rebars act as reinforcement, holding the cracked sections together and preventing the crack from expanding further. This ensures the structural integrity of the slab is maintained, safeguarding its load-bearing capacity. In conclusion, steel rebars are indispensable in bolstering the load-bearing capacity of concrete slabs. They provide tensile strength, ensure even load distribution, and inhibit crack propagation. By incorporating rebars, the durability and ability of concrete structures to withstand heavy loads are significantly improved, making them indispensable components in construction projects.
- Q: How do steel rebars affect the overall fire resistance of concrete structures?
- The overall fire resistance of concrete structures is greatly affected by steel rebars. These reinforcement bars, also known as steel rebars, are utilized in concrete structures to provide strength and stability. Their behavior when exposed to fire can either improve or weaken the fire resistance of the concrete structure. The fire resistance of the structure benefits from the inclusion of steel rebars. Steel's high thermal conductivity aids in dissipating the heat produced during a fire, preventing localized overheating and reducing the risk of structural failure. This dispersal of heat through the steel rebars slows down the rate at which the concrete's temperature rises, allowing for more time to evacuate and fight the fire. Furthermore, the presence of steel rebars also helps maintain the structural integrity of the concrete during a fire. Concrete has low tensile strength, and when subjected to high temperatures, it tends to crack and spall. However, the presence of steel rebars mitigates this issue by acting as reinforcement, holding the concrete together and preventing it from disintegrating due to heat. However, it is important to note that steel rebars can have a negative impact on fire resistance if not designed or protected properly. Insufficient size and spacing of the rebars can lead to a rapid transfer of heat through the concrete, resulting in premature failure. Additionally, if the rebars are not adequately protected with fire-resistant materials, they can lose their strength and integrity, further compromising the overall fire resistance of the structure. To ensure optimal fire resistance, designers and engineers consider various factors such as the size, spacing, and coating of the steel rebars, as well as the thickness of the concrete cover. Additionally, fireproofing measures such as using intumescent coatings, fire-resistant insulation, and fireproof claddings can be implemented to enhance the fire resistance of steel rebars and the overall concrete structure. In conclusion, steel rebars play a vital role in the fire resistance of concrete structures. When appropriately designed and protected, they enhance fire resistance by dissipating heat and maintaining structural integrity. However, inadequate design or lack of protection can compromise fire resistance. Therefore, it is crucial to adhere to proper design guidelines and implement appropriate fireproofing measures to ensure the overall fire safety of concrete structures.
- Q: What is the lifespan of steel rebars in different environments?
- The lifespan of steel rebars can vary depending on the environment they are exposed to. In general, steel rebars have a long lifespan and can last for many decades in most environments. However, in harsh or corrosive environments such as coastal areas with high salt content or industrial areas with chemical exposure, the lifespan may be reduced. Proper maintenance and protective measures, such as coatings or cathodic protection, can significantly increase the lifespan of steel rebars in these environments.
- Q: Can steel rebars be used in modular bridges?
- Yes, steel rebars can be used in modular bridges. Steel rebars are commonly used in the construction of bridges due to their strength, durability, and ability to handle heavy loads. They provide reinforcement to the concrete components of the bridge, ensuring its structural integrity. In modular bridge construction, steel rebars are often incorporated into precast concrete elements, allowing for efficient and cost-effective assembly of the bridge modules.
- Q: Are there any environmental concerns associated with steel rebar production?
- Yes, there are environmental concerns associated with steel rebar production. The production process involves the extraction of raw materials, such as iron ore, which has a significant impact on land and water resources. Additionally, the production of steel rebar requires a substantial amount of energy, which often comes from non-renewable sources, leading to greenhouse gas emissions. Moreover, the manufacturing process generates waste materials and pollutants, such as slag and emissions from furnaces. To mitigate these concerns, efforts are being made to improve energy efficiency, reduce emissions, and promote recycling in the steel rebar industry.
- Q: What are the guidelines for protecting steel rebars during concrete pouring?
- To ensure the durability and strength of reinforced concrete structures, it is crucial to prioritize the protection of steel rebars during the concrete pouring process. The following guidelines should be adhered to: 1. Thoroughly clean the rebars prior to concrete pouring in order to eliminate any dirt, rust, or contaminants. This can be accomplished by using wire brushes or power tools to achieve a clean and smooth surface. 2. After cleaning, apply a suitable rust inhibitor or anti-corrosion coating to the rebars. This will provide protection against corrosion caused by moisture or chemicals present in the concrete. 3. Ensure that the rebars are placed at the correct depth and spacing as indicated in the structural drawings or design codes. This will provide the necessary reinforcement and structural strength to the concrete. 4. Use appropriate supports, such as chairs or spacer blocks, to maintain the correct alignment and position of the rebars during the concrete pour. This will prevent any displacement or movement of the rebars. 5. Securely tie the rebars together at intersections and overlap areas using steel wire or rebar ties. This will ensure that the rebars remain in place and maintain the desired structural configuration. 6. Prevent direct contact between the rebars and the ground during the pouring process. This can be achieved by elevating the rebars above the ground surface using plastic or concrete chairs. 7. Cover the exposed ends of the rebars with plastic caps to shield them from moisture, dirt, or other contaminants while the concrete cures. 8. Ensure that the rebars are adequately covered by the concrete. The concrete cover refers to the distance between the outer surface of the rebars and the nearest outer surface of the concrete. This cover protects the rebars from external elements and prevents corrosion. 9. Exercise caution during concrete placement to avoid displacing or damaging the rebars. Proper pouring techniques, such as utilizing a tremie pipe or a concrete pump, can help minimize the impact on the rebars. 10. After the concrete is poured, it is vital to properly cure and protect it. This involves covering the concrete with wet burlap or plastic sheeting to maintain moisture levels and prevent premature drying, cracking, or shrinkage. Adequate curing will also assist in protecting the rebars from corrosion. By adhering to these guidelines, effective protection of the rebars during concrete pouring can be achieved, guaranteeing the durability and strength of the reinforced concrete structure.
- Q: How are steel rebars protected from rusting during storage?
- Steel rebars are protected from rusting during storage by applying a coating of corrosion-resistant material, such as epoxy, zinc, or paint. This protective layer acts as a barrier, preventing moisture and oxygen from coming in contact with the steel surface, thus reducing the risk of rust formation. Additionally, rebars are often stored in dry and controlled environments to minimize exposure to humidity, which further helps to prevent rusting.
- Q: How do steel rebars bond with concrete?
- Steel rebars bond with concrete through a process called mechanical interlocking, where the rough surface of rebars provides a strong grip with the concrete. Additionally, during the curing process, a chemical reaction occurs between the alkaline environment of concrete and the iron surface of the rebars, forming a layer of iron oxide that further enhances the bond strength.
- Q: Can steel rebars be used in combination with other reinforcement materials?
- Combining steel rebars with other reinforcement materials is a common practice in construction projects. Steel rebars provide tensile strength and improve overall structural integrity in reinforced concrete structures. However, additional reinforcement materials may be needed in certain cases to meet design requirements or overcome unique construction challenges. For example, in areas with high seismic activity, it is important to prioritize flexibility and ductility. In these situations, steel rebars can be combined with materials like fiber-reinforced polymer (FRP) bars or carbon fiber-reinforced polymer (CFRP) strips. These materials offer increased strength and flexibility, enhancing the structure's ability to withstand seismic forces. Furthermore, when corrosion is a concern, steel rebars can be used alongside corrosion-resistant materials such as stainless steel rebars or epoxy-coated rebars. These materials form a protective barrier, preventing direct contact between the steel rebars and moisture or corrosive agents. Moreover, in specialized applications like precast concrete elements or composite structures, steel rebars can be used in conjunction with other reinforcement materials like prestressed tendons or structural fibers. This combination allows for load redistribution and ensures optimal structural performance. In conclusion, combining steel rebars with other reinforcement materials is an effective way to meet specific construction requirements, improve structural performance, and address challenges related to seismic activity, corrosion, or specialized applications.
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Reinforcing Deformed Steel Bars in Grade HRB400
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 20000 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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