Steel Reinforcing Rebars in Hign Quality
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 10000 m.t./month
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Quality Product, Order Online Tracking, Timely Delivery
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Product Description:
OKorder is offering Steel Reinforcing Rebars in Hign Quality 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 African, South American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.
Product Applications:
Steel Reinforcing Rebars in Hign Quality are ideal for structural applications and are widely used in the construction of buildings and bridges, and the manufacturing, petrochemical, and transportation industries.
Product Advantages:
OKorder's Steel Reinforcing Rebars in Hign Quality are durable, strong, and wide variety of sizes.
Main Product Features:
· Premium quality
· Prompt delivery & seaworthy packing (30 days after receiving deposit)
· Can be recycled and reused
· Mill test certification
· Professional Service
· Competitive pricing
Product Specifications:
Manufacture: Hot rolled
Grade: HRB335,HRB400,HRB500
Certificates: ISO, SGS, BV, CIQ
Length: 6m – 12m, as per customer request
Packaging: Export packing, nude packing, bundled
Chemical composition (%): | C | Si | Mn | P | S | Ceq | |||
HRB335 HRBF335 |
0.25 |
0.80 |
1.60 |
0.045 |
0.045 | 0.52 | |||
HRB400 HRBF400 | 0.54 | ||||||||
HRB500 HRBF500 | 0.55 | ||||||||
Mechanical properties | Steel | Rel/ MPa | Rm/ MPa | A/ % | Agt/ % | ||||
≥ | |||||||||
HRB335 HRBF335 | 335 | 455 | 17 |
7.5 | |||||
HRB400 HRBF400 | 400 | 540 | 16 | ||||||
HRB500 HRBF500 | 500 | 630 | 15 | ||||||
FAQ:
Q1: what is the difference between actual weight and theoretical weight?
A1: All the section steel has two weights: actual weight and theoretical weight. Actual weight is the weighing out when the product delivered from the mill. Theoretical weight is calculated by pieces. The invoice can be based on each of them as your request.
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 arrange production. The normal sizes with the normal grade can be produced within one month. The specific shipping date is dependent upon international and government factors, the delivery to international main port about 45-60days.
Images:
- Q: How are steel rebars stored and transported on-site?
- Steel rebars are typically stored on-site in bundles or stacks, either horizontally or vertically, with adequate spacing between each bundle to ensure stability and easy access. To transport them, rebars are usually loaded onto trucks using cranes or forklifts, secured with straps or chains to prevent movement or falling during transportation. It is important to handle and store rebars properly to prevent damage or accidents and ensure their quality and structural integrity.
- Q: How do steel rebars improve the flexural strength of concrete?
- Concrete's flexural strength is enhanced by the presence of steel rebars, which reinforce the material and resist tensile forces. Although concrete is strong in compression, it lacks the same strength in tension, making it prone to cracking and failure under bending or other flexural stresses. The addition of steel rebars to the concrete results in a composite material with improved flexural strength. These rebars serve as reinforcement, absorbing and distributing tensile forces throughout the structure. When subjected to bending, the rebars counteract the tension, effectively preventing cracks from forming and spreading. Typically, the rebars are strategically placed in areas where tensile stresses are anticipated, such as the bottom of a beam or the tension face of a slab. Their purpose is to provide sufficient strength to bear the tensile forces and safeguard the concrete from failure. The bond between the rebars and the concrete is essential for ensuring effective transfer of loads from the concrete to the steel reinforcement. Furthermore, the incorporation of rebars allows for the design of slimmer and more efficient concrete elements. By providing the necessary tensile strength, the amount of concrete required can be reduced, resulting in cost savings and lighter structures. The combination of concrete and steel rebars maximizes the material properties of both components, creating a composite material that exhibits strength in both compression and tension. In summary, steel rebars significantly enhance the flexural strength of concrete by reinforcing it against tensile forces, thereby preventing cracking and failure. This reinforcement enables the design of more efficient and durable structures.
- Q: Can steel rebars be used in combination with other reinforcement materials?
- Yes, steel rebars can be used in combination with other reinforcement materials in construction projects. Steel rebars are commonly used in reinforced concrete structures to provide tensile strength and enhance the overall structural integrity. However, in some cases, additional reinforcement materials may be required to meet specific design requirements or address unique construction challenges. For instance, in high seismic areas, where flexibility and ductility are crucial, steel rebars can be combined with other materials such as fiber-reinforced polymer (FRP) bars or carbon fiber-reinforced polymer (CFRP) strips. These materials offer enhanced strength and flexibility, helping to improve the structure's resistance to seismic forces. Moreover, in situations where corrosion is a concern, steel rebars can be used in combination with corrosion-resistant materials like stainless steel rebars or epoxy-coated rebars. These materials create a protective barrier, preventing the steel rebars from coming in direct contact with moisture and corrosive agents. Additionally, in some specialized applications such as precast concrete elements or composite structures, steel rebars can be used alongside other reinforcement materials like prestressed tendons or structural fibers. This combination allows for the redistribution of loads and ensures optimal structural performance. In summary, steel rebars can be effectively combined with other reinforcement materials to meet specific construction requirements, enhance structural performance, and address challenges related to seismic activity, corrosion, or specialized applications.
- Q: How do steel rebars affect the shrinkage and creep of concrete?
- Concrete's shrinkage and creep behavior can be significantly influenced by steel rebars. Shrinkage refers to the concrete's volume reduction caused by moisture loss during drying, while creep refers to its time-dependent deformation under sustained load. The inclusion of steel rebars helps mitigate concrete shrinkage. As the concrete shrinks, the rigid rebars resist this reduction and provide restraint. This restraint minimizes volume changes and reduces cracking caused by shrinkage. Moreover, the tensile strength of rebars allows them to distribute stress and prevent localized cracking, further minimizing the impact of shrinkage on overall concrete performance. Regarding creep, steel rebars can increase concrete's deformation. This is because the rebars introduce additional stress and strain, leading to greater creep deflections. However, compared to factors like mix design, water-cement ratio, and curing conditions, the effect of steel rebars on creep is generally considered minor. It's important to note that proper reinforcement layout design and detailing can minimize the impact of steel rebars on shrinkage and creep. Adequate spacing, rebars cover, and reinforcement ratios optimize both concrete and rebars' performance. Additionally, the use of supplementary cementitious materials like fly ash or silica fume can reduce shrinkage and mitigate creep's impact. In summary, steel rebars are crucial in minimizing concrete's shrinkage-related issues through restraint and stress distribution. Though they may increase creep deformation, their impact is generally minor compared to other factors. Proper reinforcement design and detailing optimize concrete and steel rebars' performance in terms of shrinkage and creep.
- Q: Can steel rebars be used in the construction of road bridges or flyovers?
- Yes, steel rebars can be used in the construction of road bridges or flyovers. Steel rebars provide the necessary strength and durability required to support heavy loads and withstand the stresses and strains experienced by these structures. They are commonly used as reinforcement in concrete structures, including road bridges and flyovers, to enhance their structural integrity and ensure long-term stability.
- Q: What are the safety precautions when working with steel rebars?
- When working with steel rebars, it is important to follow several safety precautions to minimize the risk of accidents and injuries. Here are some key safety measures to consider: 1. Personal Protective Equipment (PPE): Always wear the appropriate PPE, including safety glasses or goggles, gloves, steel-toed boots, and a hard hat. This will protect you from potential hazards such as falling objects, flying debris, or accidental contact with sharp edges. 2. Training and awareness: Ensure that all workers involved in handling steel rebars receive proper training on safe work practices and are aware of the potential hazards associated with this work. Regular safety meetings and reminders can help reinforce this knowledge. 3. Proper lifting techniques: Steel rebars can be heavy and awkward to handle. Use proper lifting techniques, such as bending at the knees and lifting with your legs, to avoid strains or back injuries. If necessary, use mechanical lifting aids, such as cranes or hoists, to reduce the physical strain on workers. 4. Secure storage and handling: Store steel rebars in a secure and organized manner to prevent them from falling or rolling onto workers. When moving or transporting rebars, ensure they are properly secured to prevent them from shifting or falling during transit. 5. Cutting and bending precautions: When cutting or bending steel rebars, use appropriate tools and equipment, such as bolt cutters or rebar benders. Always wear protective gloves and ensure that the cutting or bending area is clear of other workers to prevent accidental injuries. 6. Fall protection: When working at heights, such as during the installation of rebars in elevated structures, ensure proper fall protection measures are in place. This may include using safety harnesses, guardrails, or safety nets to prevent falls. 7. Fire prevention: Steel rebars can generate sparks when cut or welded, so it is crucial to have proper fire prevention measures in place. Clear the work area of flammable materials, have fire extinguishers readily available, and follow appropriate welding safety protocols. 8. Regular equipment maintenance: Keep all tools and equipment used for handling steel rebars well-maintained and in good working condition. Regularly inspect them for any damage or defects that could compromise safety. By following these safety precautions, you can create a safer working environment when handling steel rebars and reduce the risk of accidents or injuries.
- Q: Can steel rebars be used in the construction of offshore oil and gas platforms?
- Yes, steel rebars can be used in the construction of offshore oil and gas platforms. Steel rebars are commonly used for reinforcing concrete structures, providing additional strength and durability. In the construction of offshore platforms, reinforced concrete is often utilized for the substructures, such as the foundations and caissons. Steel rebars play a crucial role in reinforcing these concrete structures to withstand the harsh marine environment, including corrosion and extreme loads.
- Q: What is the average lifespan of steel rebars in marine environments?
- Several factors can influence the average lifespan of steel rebars in marine environments. On the whole, these rebars tend to last between 50 and 100 years in such settings. This estimate considers the corrosive properties of saltwater, which can hasten the decay of steel structures. Furthermore, the quality of the steel, the marine structure's design and construction, and maintenance practices can all impact the rebars' lifespan. Regular inspections, the application of protective coatings, and appropriate maintenance can effectively prolong the rebars' longevity in marine environments.
- Q: What is the effect of overloading on steel rebars?
- The effect of overloading on steel rebars is that it can lead to their deformation or failure. Overloading refers to subjecting the rebars to loads or forces that exceed their designed capacity. This can cause the rebars to bend, crack, or break, compromising the structural integrity of the reinforced concrete. It is crucial to ensure that rebars are not subjected to excessive loads to prevent potential safety hazards and maintain the overall strength and durability of the structure.
- Q: What is the effect of carbonation on steel rebars?
- The primary impact of carbonation on steel rebars is negative. Carbonation is the process by which carbon dioxide from the atmosphere reacts with the alkaline compounds in concrete, resulting in a decrease in its pH level. This pH reduction gradually diminishes the protective layer of steel rebars known as the passivation layer. When carbonation compromises the passivation layer, the steel rebars become more susceptible to corrosion. Carbon dioxide reacts with moisture in the concrete, generating carbonic acid, which further lowers the pH level and speeds up the corrosion process. As corrosion advances, the steel rebars may lose their structural integrity, compromising the overall strength and durability of the concrete structure. Additionally, the expansion of corrosion products can apply pressure on the surrounding concrete, causing cracking and spalling. This exposes the steel rebars to more moisture and oxygen, exacerbating the corrosion process. Furthermore, carbonation can diminish the effectiveness of any protective coatings applied to the rebars, making them even more prone to corrosion. To mitigate the effects of carbonation on steel rebars, various preventive measures can be implemented. These measures include using concrete that is less permeable to carbon dioxide, ensuring appropriate concrete cover thickness, and employing corrosion-resistant steel with higher levels of chromium and/or other alloying elements. Regular monitoring and maintenance of concrete structures are also crucial to detect and address any signs of corrosion at an early stage. In conclusion, carbonation can have an adverse impact on steel rebars by compromising the passivation layer, resulting in corrosion and weakening of the structure. Therefore, it is essential to implement preventive measures and regularly maintain steel-reinforced concrete structures to ensure their long-term durability and safety.
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Steel Reinforcing Rebars in Hign Quality
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 10000 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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