Material steel rebar high quality from China
- Loading Port:
- Guangzhou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
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Specification
Rebar has ridges that bind it mechanically to the concrete with friction, it can still be pulled out of the concrete under high stresses,
an occurrence that often precedes a larger-scale collapse of the structure. To prevent such a failure, rebar is either deeply embedded
into adjacent structural members, or bent and hooked at the ends to lock it around the concrete and other rebars. This first approach increases the friction locking the bar into place while the second makes use of the high compressive strength of concrete.
Common rebar is made of unfinished steel, making it susceptible to rusting. As rust takes up greater volume than the iron or steel
from which it was formed, it causes severe internal pressure on the surrounding concrete, leading to cracking, spalling, and ultimately, structural failure. This is a particular problem where the concrete is exposed to salt water, as in bridges built in areas where salt is
applied to roadways in winter, or in marine applications. Epoxy-coated rebar or stainless steel rebar may be employed in these situations at greater initial expense, but significantly lower expense over the service life of the project. Fiber-reinforced polymer rebar is now also being
used in high-corrosion environments
Features
1、Pure steel quality, stable chemical contents, small tolerance.
2、Constant Quality, good drawing performance.
3、High dimension accuracy degree, accuracy degree of Level C up to 80%, smooth surface, less scale, easy to be pickled.
4、Automatic bundling with 4 lines by Machine in tidy and good looks
5、Big high quality percentage, small coil percentage, and heavy coil weight for Hard Coil.
6、High sorbitizing percentage.
Product Description :
Chemical composition (%): | Steel | C | Si | Mn | P | S | Ceq | ||||
HRB335 |
0.25 |
0.80 |
1.60 |
0.045 |
0.045 | 0.52 | |||||
HRB400 | 0.54 | ||||||||||
HRB500 | 0.55 | ||||||||||
Mechanical properties | Steel | Rel/ MPa | Rm/ MPa | A/ % | Agt/ % | ||||||
≥ | |||||||||||
HRB335 | 335 | 455 | 17 |
7.5 | |||||||
HRB400 | 400 | 540 | 16 | ||||||||
HRB500 | 500 | 630 | 15 | ||||||||
Package: | Standard export packing or as customer's request | ||||||||||
Application: | Construction, building, bridge, road. ect | ||||||||||
Payment terms | 1).100% irrevocable L/C at sight. | ||||||||||
Delivery time | 15-30 days after receipt of L/C or deposit by T/T | ||||||||||
Packing:
In bundles, each bundle weight 3.5 tons. Load by container or by bulk verssel.
Our service
(1) We cooperate with famous factories with advanced equipment and well trained workers.
(2) We can provide factory price with trading company service.
(3) We continuously work on the improvement of our processes, guaranteeing consistently high standards
of quality to keep none compensation.
(4) We guarantee 24 hours response and 48 hours solution providing service.
(5) We accept small order quantity before formal cooperation.
(6) We deliver the agreed quality at the agreed time, reacting to changes in customer wishes in a flexible way.
(7) Due to our volume and selling power, we have excellent freight rates with shipping lines.
(8) We strive to always be fair and honest in our dealings with customers.
(9) We strive to work together with customers to achieve much more than we can achieve alone.
(10) Through our passion and commitment we aim to be a market leader in all our key markets. To maintain
our position as market leader we must continue to add value in all that we do.
FAQ:
1.Q: What's your MOQ(minimum order quantity)?
A: One full container, mixed acceptable .
2. Q: What's your packing methods?
A: Packed in bundle or bulk ..
3. Q: How can I buy CNBM products in my country?
A:Please send us an inquiry or email ,we will reply to you if there is distributor in your country
4. Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
5. Q: How long does it take to get the product if i place an order?
A:With the process of your requirements,we will pack and deliver in 3-7 days. If it is by sea shipment,it will take 15-45 days depending on different locations
- Q:Are steel rebars suitable for use in structures with high resistance to chemicals?
- No, steel rebars are not suitable for use in structures with high resistance to chemicals.
- Q:What are the guidelines for proper tying of steel rebars in concrete structures?
- To ensure the structural integrity and durability of concrete structures, it is crucial to adhere to guidelines for the proper tying of steel rebars. Here are some important guidelines to consider: 1. Rebar Placement: Before tying, accurately position the rebars according to the structural drawings and design specifications. Place them at the designated locations and depths, ensuring proper spacing to provide the necessary strength and reinforcement. 2. Tying Tools: Utilize suitable tools like pliers or rebar tying machines for secure and proper tying. Ensure that the tools are in good condition and appropriate for the size and type of rebars being used. 3. Tying Technique: Employ a consistent and efficient tying technique. Begin by securely holding the rebars together at the intersection point. Wrap the tie wire around both rebars multiple times, ensuring tight and firm connections. Properly twist and neatly cut the tie wire to avoid any protrusions. 4. Tie Wire Selection: Use high-quality tie wires with sufficient strength to withstand tension and load requirements. Opt for corrosion-resistant materials such as galvanized steel or stainless steel to prevent rusting and deterioration over time. 5. Tying Spacing: Adhere to the specified tying spacing as per the design requirements. Adequate spacing between ties helps maintain rebars in their designated positions, preventing displacement during concrete pouring and subsequent curing. 6. Tying Quantity: Tie rebars at suitable intervals to ensure ample connection and reinforcement. The number of ties needed depends on the size, shape, length of rebars, and structural design specifications. 7. Tying Consistency: Maintain consistency in tying throughout the entire concrete structure. Uneven or inconsistent tying can result in weak points, reduced reinforcement, and compromised structural integrity. 8. Tying Safety: Prioritize safety during the tying process. Wear appropriate personal protective equipment (PPE) like gloves and safety glasses to prevent injuries. Take precautions to avoid tripping hazards and ensure a safe working environment. 9. Inspection and Quality Control: Regularly inspect the tied rebars to ensure compliance with design specifications and quality standards. Conduct visual inspections and perform pull tests to assess the strength and effectiveness of the ties. 10. Compliance with Codes and Standards: Adhere to local building codes, industry standards, and engineering guidelines specific to your region. These codes provide essential requirements for rebar tying, ensuring the durability and safety of the concrete structure. By following these guidelines, construction professionals can enhance the strength, stability, and longevity of concrete structures through proper tying of steel rebars.
- Q:Can steel rebars be used in power plant construction?
- Yes, steel rebars can be used in power plant construction. Steel rebars, also known as reinforcing bars, are commonly used in the construction industry to provide strength and support to concrete structures. In power plant construction, steel rebars are often used to reinforce concrete foundations, walls, and structural elements such as columns and beams. The high tensile strength and durability of steel rebars make them ideal for withstanding the heavy loads and extreme conditions typically encountered in power plant environments. Moreover, steel rebars can also be used in the construction of reinforcing cages for underground pipelines and cooling towers, enhancing the overall strength and stability of the power plant infrastructure.
- Q:Can steel rebars be used in structures exposed to aggressive chemicals?
- No, steel rebars should not be used in structures exposed to aggressive chemicals as they can corrode and weaken over time, compromising the structural integrity of the building.
- Q:Are steel rebars resistant to termites and other pests?
- Yes, steel rebars are highly resistant to termites and other pests.
- Q:How do steel rebars affect the electrical conductivity of a structure?
- Steel rebars have a minimal effect on the electrical conductivity of a structure. While steel is a conductor of electricity, the presence of rebars in concrete does not significantly enhance or impair the overall electrical conductivity of the structure.
- Q:How are steel rebars protected from fire damage?
- Steel rebars are protected from fire damage through various methods. One commonly used method is the application of fire-resistant coatings. These coatings are specifically designed to withstand high temperatures and prevent the steel from reaching its critical temperature, which is when it starts to lose its structural integrity. Another method is the use of fire-resistant concrete encasement. In this method, the rebars are embedded within a layer of concrete that has been specifically designed to resist fire. This concrete acts as a barrier, preventing the heat from directly reaching the steel rebars and thus protecting them from fire damage. Additionally, fire-resistant wraps or blankets can be used to provide temporary protection to steel rebars during construction. These wraps are made from fire-resistant materials and are applied directly to the rebars, creating a barrier that prevents direct exposure to fire. It is important to note that the level of fire protection required for steel rebars depends on the specific building codes and regulations in place. These codes typically specify the minimum fire resistance rating that must be achieved for structural elements, including rebars, in order to ensure the safety of the building and its occupants.
- Q:How do steel rebars contribute to the crack control in slabs and walls?
- Steel rebars contribute to crack control in slabs and walls through their ability to resist tensile forces. When concrete slabs and walls experience loads, such as the weight of the structure or external forces, they may develop tensile stresses. Concrete is strong in compression but weak in tension, making it prone to cracking under tensile forces. Steel rebars are embedded within the concrete to counteract these tensile stresses. By absorbing and distributing the tensile forces, rebars help to prevent crack formation and control their propagation. The rebars act as reinforcement, increasing the overall tensile strength of the concrete. The presence of steel rebars in slabs and walls helps to limit the width and length of cracks that may occur by providing resistance against the tensile stresses. This crack control is crucial for maintaining the structural integrity and durability of the concrete elements. Furthermore, steel rebars can also contribute to crack control by improving the overall ductility of the structure. Ductility refers to the ability of a material to deform under load without fracturing. By enhancing the ductility of the concrete, the rebars allow the structure to absorb energy and deform in a controlled manner, reducing the likelihood of sudden failure or catastrophic collapse. In summary, steel rebars play a vital role in crack control in slabs and walls by increasing the tensile strength of concrete, limiting crack width and length, and improving overall structural ductility. Their presence ensures the long-term durability and safety of these concrete elements.
- Q:How do steel rebars affect the overall fire safety of concrete structures?
- The overall fire safety of concrete structures can be affected by steel rebars, both positively and negatively. On the positive side, steel rebars can strengthen the fire resistance of concrete structures. Concrete has low thermal conductivity, which means it doesn't easily conduct heat. However, exposure to fire can cause concrete to crack and lose its integrity. Steel rebars help address this issue by providing additional tensile strength, acting as reinforcement to prevent cracking and collapse under intense heat. On the flip side, steel rebars can pose challenges to fire safety. Steel is a good heat conductor, transferring heat from the fire to other parts of the structure. This can weaken the concrete and compromise overall fire safety. Furthermore, steel rebars can expand under high temperatures, potentially causing more cracking and damage to the concrete. To improve fire safety in concrete structures with steel rebars, several measures can be taken. Applying fire-resistant coatings or fireproofing materials on the rebars can minimize heat transfer to the surrounding concrete. Installing fire-resistant insulation or fire barriers around the rebars can also offer additional protection. Proper design and construction practices, including appropriate spacing and size of rebars, are crucial to maintaining the fire resistance of the concrete structure. In conclusion, steel rebars have a significant impact on the fire safety of concrete structures. While they enhance fire resistance, challenges such as heat transfer and expansion must be addressed. By implementing appropriate measures and construction practices, the negative effects of steel rebars on fire safety can be minimized, resulting in improved fire resistance for concrete structures.
- Q:How do steel rebars affect the overall seismic performance of buildings?
- The utilization of steel rebars plays a vital role in enhancing the seismic performance of buildings as a whole. When properly integrated into the structural system, these reinforced bars offer substantial strength and ductility to the building, enabling it to effectively withstand seismic forces. One of the main advantages of steel rebars lies in their ability to augment the tensile strength of concrete structures. Although concrete possesses compression strength, it lacks tension strength. By incorporating steel rebars within the concrete, the tensile strength is significantly enhanced, thereby preventing the concrete from cracking or failing under the strain of seismic forces. In the event of an earthquake, steel rebars aid in distributing the seismic forces throughout the structure, minimizing localized damage and ensuring a more uniform response. Serving as a network of interconnected elements, the rebars transfer the energy generated by the earthquake to the surrounding areas, thus reducing vulnerability to localized failures. Furthermore, steel rebars enhance the ductility of the building, enabling it to deform without compromising its structural integrity. During an earthquake, buildings encounter substantial lateral forces, and the ductility provided by the rebars allows the structure to absorb and dissipate these forces through controlled deformation. This prevents sudden and catastrophic failure, granting occupants more time to evacuate in a safe manner. Moreover, steel rebars can be strategically positioned in critical areas of the building, such as at beam-column connections, where the highest stresses occur during an earthquake. By reinforcing these vulnerable points, the rebars ensure that the building maintains its structural integrity and remains resistant to collapse. To summarize, the integration of steel rebars significantly enhances the overall seismic performance of buildings by increasing tensile strength, distributing seismic forces, enhancing ductility, and reinforcing critical areas. Their incorporation into the structural system helps mitigate the potential for damage and ensures the safety of occupants during seismic events.
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Material steel rebar high quality from China
- Loading Port:
- Guangzhou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t.
- Supply Capability:
- 19000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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