GB Standard HRB400 Steel Deformed Bar 28mm/32mm
- 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 28mm/32mm
Description:
-Standard: GB
-Material: HRB400
-Specification:
| Diameter(mm) | Section Area(mm2) | Mass(Kg/m) | Length(m) |
| 28 | 615.8 | 4.83 | 9, 12 or as customs' request |
| 32 | 804.2 | 6.31 | 9, 12 or as customs' request |
Chemical Composition(%) of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
| 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 28mm/32mm:
Yield Strength (N/cm²) | Tensile Strength (N/cm²) | Elongation (%) |
≥400 | ≥570 | ≥14 |
Usage and Applications of GB Standard HRB400 Steel Deformed Bar 28mm/32mm:
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 28mm/32mm:
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 28mm/32mm:
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- Q: Can steel rebars be used in modular bridge construction?
- Yes, steel rebars can be used in modular bridge construction. Steel rebars provide strength, durability, and structural stability to the bridge modules, making them an ideal choice for this type of construction.
- Q: How do steel rebars affect the fire resistance of concrete structures?
- Concrete structures can greatly increase their ability to withstand fire by incorporating steel rebars. These rebars serve as reinforcement, providing extra strength and stability to the structure and enabling the concrete to endure the intense heat of a fire. The fire resistance of concrete structures primarily relies on the fact that concrete has low thermal conductivity. When exposed to high temperatures, concrete undergoes spalling, where the outer layer breaks off due to the rapid expansion of trapped water. However, the presence of steel rebars helps prevent spalling by holding the concrete together and preventing it from disintegrating. Moreover, steel rebars have a higher melting point than concrete. This means that even when exposed to extreme heat, the rebars maintain their strength and integrity. Consequently, the overall structural stability of the concrete structure remains intact, even in the presence of fire. Steel rebars also act as a heat sink, absorbing and dissipating heat away from the surrounding concrete. This dissipation of heat prevents the formation and spread of localized hotspots throughout the structure, thereby reducing the risk of structural failure. To further enhance the fire resistance of concrete structures, specialized types of steel rebars, known as fire-resistant or fire-rated rebars, can be utilized. These rebars are specifically designed to withstand high temperatures for extended periods without losing their strength. They are often coated with materials such as epoxy or intumescent coatings, which offer additional protection against fire. In conclusion, steel rebars play a vital role in improving the fire resistance of concrete structures. Their presence enhances the overall structural stability, minimizes spalling, dissipates heat, and provides additional strength to withstand the intense heat generated during a fire.
- Q: Can steel rebars be used in reinforced masonry walls?
- Yes, steel rebars can be used in reinforced masonry walls. In fact, using steel rebars is a common practice in constructing reinforced masonry walls to enhance their strength and durability. The rebars are typically embedded within the mortar joints between the masonry units, such as bricks or concrete blocks. The steel rebars help to distribute the tensile forces that may occur in the masonry wall due to external loads or structural movements, as masonry materials are primarily strong in compression but weak in tension. By adding steel rebars, the reinforced masonry walls can better resist lateral forces, such as wind or seismic loads, and prevent cracking or structural failures. Additionally, the use of steel rebars can also increase the overall stability and load-bearing capacity of the masonry wall, making it suitable for a wide range of construction projects.
- Q: What is the process of inspecting steel rebars on-site?
- The process of inspecting steel rebars on-site involves several steps. First, the inspector assesses the quality and condition of the rebars by visually examining them for any visible defects such as cracks, rust, or bending. Next, they measure the rebars' dimensions and compare them to the specifications provided by the engineer or project requirements. This ensures that the rebars are of the correct size and shape. The inspector also checks the rebars' placement and alignment within the concrete structure, making sure they are positioned correctly according to the design plans. Additionally, non-destructive testing methods like ultrasound or magnetic particle inspection may be used to detect any hidden defects or flaws in the rebars. The inspector then documents their findings and prepares a detailed report, highlighting any issues or deviations from the required standards. This inspection process helps ensure the strength, durability, and safety of the steel rebars used in construction projects.
- Q: What is the minimum cover required for steel rebars in concrete?
- The minimum cover required for steel rebars in concrete typically depends on the structural design and the intended exposure conditions. However, as a general guideline, the minimum cover requirement for steel rebars in concrete is usually specified as 1.5 inches (38 millimeters) for normal indoor or dry conditions, and may increase to 2 inches (51 millimeters) or more for harsher outdoor or corrosive environments. It is essential to consult the relevant building codes, standards, and engineering professionals to determine the specific minimum cover requirement for a particular project.
- Q: Can steel rebars be used in soundproof structures?
- Steel rebars can be used in soundproof structures, but they are not the sole component responsible for soundproofing. Steel rebars are primarily used for reinforcement in concrete structures, such as walls or floors. While they can help in reducing sound transmission to some extent, additional soundproofing materials and techniques are necessary to achieve effective soundproofing. To create a soundproof structure, several factors need to be considered. One important factor is the mass of the structure. Steel rebars, being heavy and dense, contribute to increasing the mass of the structure, which helps in reducing sound transmission. However, the effectiveness of soundproofing also depends on the overall design, construction techniques, and the incorporation of other sound-absorbing materials. To enhance the soundproofing capabilities of a structure, other materials can be added, such as acoustic insulation, soundproofing panels, or resilient channels. Acoustic insulation materials, such as mineral wool or acoustic foam, can be installed within the walls or floors to absorb sound waves and prevent them from traveling through the structure. Soundproofing panels can also be added to surfaces to reflect or absorb sound waves, further reducing noise transmission. Moreover, proper construction techniques should be employed to ensure that there are no gaps or air leaks that could allow sound to pass through. Using resilient channels, which isolate the structure from the surrounding surfaces, can also help in reducing sound transmission. In conclusion, while steel rebars can contribute to soundproofing a structure by increasing its mass, they alone are not sufficient to create a completely soundproof environment. Effective soundproofing requires a combination of design, construction techniques, and the incorporation of additional sound-absorbing materials to achieve the desired level of sound reduction.
- Q: What is the role of steel rebars in minimizing the risk of structural collapse?
- Steel rebars play a critical role in minimizing the risk of structural collapse in buildings and other construction projects. These reinforcing bars, commonly known as rebars, are made from steel and are used to reinforce concrete structures. They provide additional strength and durability to the concrete, making it more resistant to various forces and reducing the likelihood of collapse. One of the primary causes of structural failure is the inability of a building or structure to withstand the forces it experiences. These forces can include the weight of the structure itself, as well as external forces such as wind, earthquakes, and even human activities. Without proper reinforcement, concrete alone may not be able to bear these forces, leading to structural collapse. Steel rebars are strategically placed within the concrete to enhance its tensile strength. While concrete is very strong in compression, it is relatively weak in tension. By adding steel rebars, the concrete becomes much more resistant to tension and can better resist bending and cracking. This reinforcement allows the structure to distribute loads more evenly and prevents localized failures. Furthermore, steel rebars also help to control and limit the propagation of cracks within the concrete. In the event of a crack formation, the rebars act as a barrier and hold the concrete together, preventing further cracking and potential collapse. This is especially important in areas prone to seismic activities, as the rebars can help dissipate and absorb the energy generated by an earthquake. In addition to their structural role, steel rebars also contribute to the longevity and durability of the concrete structure. By reinforcing the concrete, rebars help to prevent corrosion and degradation caused by environmental factors such as moisture and chemicals. This ensures that the structure remains intact and stable over a longer period of time, reducing the risk of collapse due to deterioration. In summary, the role of steel rebars in minimizing the risk of structural collapse is crucial. They provide additional strength and durability to the concrete, enhancing its ability to withstand various forces and preventing failure. By reinforcing the concrete, rebars distribute loads, control crack propagation, and contribute to the longevity of the structure, ultimately ensuring the safety and stability of buildings and other construction projects.
- Q: How are steel rebars used in the construction of chemical processing plants?
- Steel rebars are used in the construction of chemical processing plants to provide strength and reinforce concrete structures. They are typically embedded in concrete foundations, walls, and floors to enhance their load-bearing capacity and ensure structural stability, especially in areas where corrosive chemicals and high temperatures are present. Rebars help prevent cracking and provide resistance against the harsh conditions commonly found in chemical processing plants, ensuring the longevity and safety of the structures.
- Q: How are steel rebars used in tunnel construction?
- Steel rebars are used in tunnel construction to reinforce the concrete structure, providing strength and durability to the tunnel walls and roof. The rebars are placed in strategic locations within the concrete to prevent cracking and structural failure due to the high pressure and forces exerted on the tunnel.
- 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.
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GB Standard HRB400 Steel Deformed Bar 28mm/32mm
- 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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