GB Standard HRB400 Steel Deformed Bar 22mm/25mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 m.t
- Supply Capability:
- 20000 m.t/month
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GB Standard HRB400 Steel Deformed Bar 22mm/25mm
Description:
-Standard: GB
-Material: HRB400
-Specification:
| Diameter(mm) | Section Area(mm2) | Mass(Kg/m) | Length(m) |
| 22 | 380.1 | 2.98 | 9, 12 or as customs' request |
| 25 | 490.9 | 3.85 | 9, 12 or as customs' request |
Chemical Composition(%) of GB Standard HRB400 Steel Deformed Bar 22mm/25mm:
| C | Mn | Si | S | P | V |
| ≤0.25 | ≤1.60 | ≤0.08 | ≤0.045 | ≤0.045 | 0.04-0.12 |
Mechanical Properties of GB Standard HRB400 Steel Deformed Bar 22mm/25mm:
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) |
≥400 | ≥570 | ≥14 |
Usage and Applications of GB Standard HRB400 Steel Deformed Bar 22mm/25mm:
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 GB Standard HRB400 Steel Deformed Bar 22mm/25mm:
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
Images of GB Standard HRB400 Steel Deformed Bar 22mm/25mm:
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- Q:What are the guidelines for storing steel rebars on a construction site?
- The guidelines for storing steel rebars on a construction site typically include keeping them off the ground to prevent rust and corrosion, stacking them neatly and securely to avoid accidents, and protecting them from exposure to moisture and other harmful elements. It is also important to separate different sizes and types of rebars to ensure easy identification and accessibility when needed.
- Q:What is the role of steel rebars in minimizing the risk of progressive collapse?
- Steel rebars play a critical role in minimizing the risk of progressive collapse by providing structural reinforcement and enhancing the load-bearing capacity of a building or structure. They are embedded within concrete elements such as beams, columns, and slabs, creating a composite structure that can resist higher loads and distribute them evenly. In the event of a localized failure or an unexpected load, rebars help prevent the collapse from propagating further by transferring the load to other intact elements, thereby preventing a catastrophic failure. Overall, steel rebars contribute to the structural integrity and resilience of a building, reducing the risk of progressive collapse.
- Q:How is steel rebar made?
- Steel rebar, which is short for reinforcing bar, undergoes a process known as steel reinforcement fabrication to be produced. The initial stage of manufacturing steel rebar involves melting down raw materials such as iron ore, coal, and limestone in a blast furnace. This procedure, called smelting, results in the creation of molten iron. Following smelting, the molten iron is refined and purified in a basic oxygen furnace to eliminate impurities such as carbon, sulfur, and phosphorous. By refining the molten iron, the steel that is produced attains the desired strength and properties. Once the refining process is complete, the steel is cast into long, solid bars called billets. These billets are then heated and rolled into elongated strands known as rebars. The rolling process entails passing the billets through a series of rollers that gradually shape and elongate the steel. After the rebars have been formed, they are cooled and cut into various lengths based on their intended use, such as reinforcing concrete in structures like buildings and bridges. To further enhance the strength and durability of the rebar, it can undergo a process called quenching and tempering. This involves subjecting the rebar to high temperatures, followed by rapid cooling and subsequent reheating and slow cooling. This process significantly improves the mechanical properties of the rebar, making it more resistant to wear, corrosion, and other external forces. Finally, the rebar undergoes a surface treatment process, such as hot-dip galvanizing or epoxy coating, to safeguard it against rust and corrosion. This coating ensures that the rebar maintains its structural integrity and longevity when utilized in various construction applications. In summary, the production of steel rebar involves a series of steps, including smelting, refining, casting, rolling, cutting, heat treatment, and surface coating. These processes guarantee that the final product meets the necessary strength and durability requirements for reinforcing concrete structures.
- Q:Can steel rebars be used in the construction of data centers and server rooms?
- Yes, steel rebars can be used in the construction of data centers and server rooms. Steel rebars provide structural reinforcement and can be used in the construction of walls, columns, and foundations. They help to enhance the overall strength and durability of the building, ensuring the safety and stability of the data center or server room infrastructure.
- Q:How do steel rebars affect the constructability of projects in remote locations?
- Steel rebars play a crucial role in the constructability of projects in remote locations. Their impact on construction projects in such areas can be significant in several ways. Firstly, steel rebars are essential for reinforcing the structural integrity of concrete elements. By providing tensile strength to concrete, rebars ensure that the structures can withstand various loads and external forces. This is particularly important in remote locations where the availability of construction materials might be limited. Steel rebars allow for the construction of robust and durable structures, ensuring their longevity even in harsh environmental conditions. Moreover, remote locations often lack infrastructure and may have limited access to skilled labor. Steel rebars, with their standardized sizes and shapes, make construction processes more efficient and easier to manage. They can be easily transported and assembled on-site, reducing the need for complex and time-consuming construction techniques. This is particularly beneficial in remote areas where the transportation of heavy construction materials can be challenging and costly. Furthermore, steel rebars enable the construction of taller and larger structures, which can be crucial in remote locations where land might be scarce. By reinforcing concrete elements, rebars allow for the construction of high-rise buildings or bridges, maximizing the use of available space and resources. This is especially relevant in areas with limited land availability, where vertical construction is often the most feasible option. Additionally, steel rebars contribute to the overall safety of construction projects in remote locations. Their ability to reinforce concrete elements ensures that structures can withstand seismic activities or other natural disasters, which might be more frequent in certain remote areas. This enhances the resilience of the built environment, protecting both the construction workers and the inhabitants of these remote locations. In conclusion, steel rebars greatly affect the constructability of projects in remote locations. They provide essential reinforcement to concrete structures, enhance efficiency in construction processes, enable the construction of larger structures, and ensure the safety and durability of the built environment. Their use in such areas is crucial in overcoming the challenges posed by limited resources, difficult accessibility, and harsh environmental conditions.
- Q:What is the impact of steel rebars on the overall carbon footprint of a building?
- Steel rebars have a significant impact on the overall carbon footprint of a building. The production of steel involves high carbon emissions, contributing to greenhouse gas emissions and climate change. Additionally, the extraction of raw materials and the transportation of steel rebars further increase carbon emissions. However, steel rebars provide structural strength and durability, reducing the need for future repairs or replacements. Therefore, while the use of steel rebars does contribute to the carbon footprint, proper construction practices and efficient use of materials can help mitigate their environmental impact.
- Q:How do steel rebars contribute to the overall seismic resistance of a structure?
- The overall seismic resistance of a structure is significantly enhanced by the presence of steel rebars. When an earthquake happens, the structure is subjected to strong lateral forces and vibrations. If these forces are not properly addressed, the structure may deform or even collapse. To prevent this, reinforcement bars, also known as steel rebars, are utilized to strengthen and stabilize concrete structures. One of the main advantages of steel rebars is their ability to absorb and distribute seismic energy. During an earthquake, the rebars act as a backbone within the concrete, effectively absorbing the seismic forces and preventing excessive deformation of the structure. By distributing the energy throughout the entire structure, the rebars reduce localized stress and prevent concentrated damage. Additionally, steel rebars enhance the ductility of a structure. Ductility refers to a material's ability to deform without breaking. When an earthquake occurs, the ground shakes, causing the structure to sway. Steel rebars improve the ductility of concrete by providing an extra pathway for the energy to dissipate. This allows the structure to absorb and release the seismic energy by deforming in a controlled manner, ensuring its integrity and minimizing damage. Furthermore, steel rebars increase the tensile strength of concrete. While concrete is strong in compression, it is weak in tension. Steel rebars counteract this weakness by providing tensile strength to the structure. When an earthquake happens, the rebars bear the tensile forces and prevent the concrete from cracking or collapsing under tension. This reinforcement ensures that the structure remains stable and resilient during seismic events. In conclusion, steel rebars play a crucial role in enhancing the overall seismic resistance of a structure. They absorb and distribute seismic energy, improve the ductility of concrete, and increase its tensile strength. By including steel rebars in the construction process, the structure becomes capable of withstanding the lateral forces and vibrations caused by earthquakes, reducing the risk of damage or collapse.
- Q:How do steel rebars contribute to the overall sustainability of the construction industry?
- Steel rebars contribute to the overall sustainability of the construction industry in various ways. Firstly, the use of steel rebars enhances the structural integrity and durability of concrete structures, ensuring their longevity and reducing the need for frequent repairs or replacements. This significantly reduces the amount of construction waste generated and minimizes the overall environmental impact. Additionally, steel rebars are recyclable materials, meaning they can be repurposed and reused at the end of their life cycle. This not only reduces the demand for new steel production but also lowers the energy consumption and greenhouse gas emissions associated with the manufacturing process. By promoting the circular economy, steel rebars help conserve natural resources and reduce the carbon footprint of the construction industry. Moreover, the use of steel rebars in concrete structures enhances their resistance to seismic activities and extreme weather conditions, such as hurricanes or earthquakes. This ensures the safety of the occupants and reduces the risk of damage to the infrastructure, thus minimizing the need for reconstruction and contributing to the overall resilience of the built environment. Furthermore, steel rebars can be engineered and designed to optimize the use of materials, reducing the overall weight of structures. This leads to more efficient transportation and installation processes, resulting in lower fuel consumption and transportation-related emissions. Lastly, steel rebars offer flexibility in design and construction, allowing for innovative and sustainable building solutions. They can be easily integrated into various construction methods, enabling the use of sustainable construction techniques such as prefabrication or modular construction. This enhances efficiency, reduces construction time, and minimizes disruption to the surrounding environment. In conclusion, steel rebars play a crucial role in the sustainability of the construction industry by enhancing the durability of structures, promoting recycling, reducing waste generation, conserving resources, improving safety, and enabling innovative construction techniques. Their use contributes to the overall environmental, social, and economic sustainability of the industry, making it a vital component in sustainable construction practices.
- Q:Can steel rebars be used in fire-resistant structures?
- Yes, steel rebars can be used in fire-resistant structures. When properly designed and installed, steel rebars can provide the necessary strength and stability required in fire-resistant structures. They are often encased in concrete or other fire-resistant materials to enhance their fire resistance and prevent structural failure during fire incidents.
- 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.
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GB Standard HRB400 Steel Deformed Bar 22mm/25mm
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 50 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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