Deformed Steel Bar / Hot Rolled Ribbed Bars
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 500 m.t.
- Supply Capability:
- 5000 m.t./month
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Deformed Steel Bar / Hot Rolled Ribbed Bars
Description for Deformed Steel Bar
Type | Deformed Steel Bar/ Hot Rolled Ribbed Bar |
Standard grade | GB1499.2-2007, HRB335, HRB400, HRB500 and so on. BS4449/2005, B500A, B500B etc.. SD400, SD500, ASTM A615 Gr.40, Gr60 and so on.. |
Shape | Ribbed bars |
Quality | Prime quality |
Technique | Hot rolled |
Size of diameter | 12-32mm, as requested |
Length | 6~12m, as requested |
Delivery time | 10-30 days, according to the quantity |
Note | Customized service is available (for diameter, length and chemical components etc. |
Standard: AISI, ASTM, BS, DIN, GB, JIS, GB
Grade: HRB500
Diameter: 16mm-25mm
Model Number: DIA. 10-32mm
Application: Construction materials
Dimensions: 60*60mm-150*150mm
Technique: Hot Rolled
Chemical Composition: C, Si, Mn, P, S, (B)
Alloy Or Not: Is Alloy
Shape: Square
Secondary Or Not: Non-secondary
FAQ:
Why should you choose us:
1. More than 10 years experience in this industry
2. 100,000 tons exporting per month
3. Professional foreign trade tea
4. OEM&ODM capacity
5. High quality assured & competitive price
6. Try our best to meet your needs & save your budget
7. Very popular in Southeast Asia, Africa, Mid-East and South America etc.
8. VIP membership system, first time customers and long-term cooperation customers can get extra discount on some products.
Pictures:
- Q: What are the factors that can cause steel rebars to corrode prematurely?
- There are several factors that can contribute to the premature corrosion of steel rebars. 1. Exposure to moisture: One of the primary causes of rebar corrosion is the presence of moisture. When steel rebars are exposed to water or high humidity levels for extended periods, it can lead to the formation of rust or oxidation on the surface of the rebar. 2. Chloride ions: Chloride ions, commonly found in seawater or de-icing salts, can accelerate the corrosion process of steel rebars. These ions can penetrate the concrete cover and come into contact with the rebar, causing it to corrode at a faster rate. 3. Carbonation of concrete: Carbonation occurs when carbon dioxide from the atmosphere reacts with the alkaline components of concrete. This process reduces the pH levels, leading to a decrease in the passivating effect of the concrete cover and increasing the likelihood of rebar corrosion. 4. Insufficient concrete cover: Inadequate concrete cover over the rebars can expose them to external elements, such as moisture and chloride ions, leading to accelerated corrosion. Insufficient cover may occur due to poor construction practices or inadequate design specifications. 5. Poor quality of concrete: If the concrete used in construction is of low quality, it may contain impurities or lack proper curing, resulting in an increased permeability of the concrete. This allows harmful substances like moisture and chlorides to penetrate the concrete more easily, leading to premature rebar corrosion. 6. Galvanic corrosion: When dissimilar metals come into contact in the presence of an electrolyte (such as moisture), a galvanic cell can form, resulting in accelerated corrosion. For example, if steel rebars are in contact with aluminum or copper materials, galvanic corrosion can occur. 7. Construction defects: Issues during the construction phase, such as poor workmanship or inadequate protective measures, can contribute to premature rebar corrosion. Examples include inadequate concrete compaction, improper reinforcement placement, or lack of proper waterproofing. To prevent premature corrosion of steel rebars, it is crucial to use high-quality materials, ensure proper concrete cover, employ corrosion-resistant coatings or inhibitors, and implement appropriate construction practices. Regular inspections and maintenance can also help identify and address any potential corrosion issues before they worsen.
- Q: What is the effect of high temperatures on steel rebars?
- High temperatures can have detrimental effects on steel rebars, causing them to lose their strength and structural integrity. The heat can lead to the softening and deformation of the steel, ultimately reducing its load-bearing capacity. Additionally, prolonged exposure to high temperatures can result in the formation of cracks, which further compromises the rebars' performance. It is crucial to consider the impact of elevated temperatures on steel rebars in order to ensure the safety and durability of structures.
- Q: How long do steel rebars typically last in construction?
- Steel rebars typically last for the entire lifespan of a structure, which is typically several decades or even longer.
- Q: What is the role of steel rebars in preventing structural failures?
- The role of steel rebars in preventing structural failures is to provide reinforcement and strength to concrete structures. By adding steel rebars to concrete, the composite material becomes more resistant to tension and bending forces. This helps to distribute and control the stress in the structure, preventing cracks and failure points from developing. The rebars also enhance the overall durability and longevity of the structure, ensuring its stability and safety over time.
- Q: Can steel rebars be used in the construction of dams or reservoirs?
- Yes, steel rebars can be used in the construction of dams or reservoirs. Steel rebars provide structural reinforcement and enhance the strength and durability of concrete structures, making them suitable for large-scale projects like dams and reservoirs.
- Q: What is the diameter range of steel rebars?
- The diameter range of steel rebars typically varies from 6 millimeters to 50 millimeters.
- Q: What are the factors to consider when choosing the right steel rebar for a project?
- Several factors must be considered when choosing the appropriate steel rebar for a project. These factors encompass the project type, structural requirements, environment, and specific rebar characteristics. The project type is a key factor to consider, as each type has unique structural demands. Residential buildings, bridges, and highways, for example, require different strengths and capacities. The chosen steel rebar must be able to withstand the expected loads and stresses of the project. Additionally, its size and shape should match the project's design and specifications. Structural requirements are crucial in selecting the right steel rebar. This involves evaluating the required tensile strength, yield strength, and elongation properties. It is essential to choose a rebar that provides the necessary strength and durability to maintain the project's structural integrity. The project's environment also plays a significant role. If the project will be exposed to corrosive elements like saltwater or chemicals, corrosion-resistant rebar is necessary. This choice prevents premature deterioration and ensures the structure's longevity. Furthermore, specific rebar characteristics must be assessed. The grade of the steel, which determines its strength and ductility, is important. Different grades, such as ASTM A615 or ASTM A706, possess distinct properties suitable for various applications. The rebar's surface finish, whether plain or deformed, also affects its bonding ability with concrete. Availability and cost are additional factors to consider. It is vital to ensure that the selected rebar is readily available in the required quantities and sizes. Moreover, the rebar's cost should align with the project's budget constraints. In conclusion, choosing the appropriate steel rebar for a project entails considering the project type, structural requirements, environmental conditions, and specific rebar characteristics. By carefully evaluating these factors, one can select the most suitable steel rebar that guarantees the structure's durability and longevity.
- Q: What are the guidelines for proper tying of steel rebars in concrete structures?
- The guidelines for the proper tying of steel rebars in concrete structures are crucial to ensure the structural integrity and durability of the construction. Here are some important guidelines to follow: 1. Rebar Placement: Prior to tying, ensure that the rebars are accurately positioned as per the structural drawings and design specifications. The rebars should be placed at the designated locations, depths, and with proper spacing to provide the required strength and reinforcement. 2. Tying Tools: Use appropriate tools such as pliers or rebar tying machines to ensure proper and secure tying. The tools should be in good condition and suitable for the size and type of rebars being used. 3. Tying Technique: Adopt a consistent and efficient tying technique. Start by securely holding the rebars together at the intersection point. Wrap the tie wire around both rebars multiple times, ensuring tight and firm connections. The tie wire should be properly twisted and cut neatly to avoid any protrusions. 4. Tie Wire Selection: Use high-quality tie wires with sufficient strength to withstand the tension and load requirements. The tie wire should be corrosion-resistant, typically made of galvanized steel or stainless steel, to prevent rusting and deterioration over time. 5. Tying Spacing: Follow the specified tying spacing as per the design requirements. Adequate spacing between ties helps maintain the rebars in their designated positions and prevents any displacement during concrete pouring and subsequent curing. 6. Tying Quantity: Tie rebars at appropriate intervals to ensure sufficient connection and reinforcement. The number of ties required will depend on the size, shape, and length of the rebars used, as well as the structural design specifications. 7. Tying Consistency: Maintain consistency in tying throughout the entire concrete structure. Uneven or inconsistent tying can lead to weak points, reduced reinforcement, and compromised structural integrity. 8. Tying Safety: Always prioritize safety during the tying process. Wear appropriate personal protective equipment (PPE) such as gloves and safety glasses to protect against 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 ensure the proper tying of steel rebars in concrete structures, improving their strength, stability, and longevity.
- Q: How do steel rebars affect the shrinkage and creep behavior of concrete?
- The shrinkage and creep behavior of concrete are significantly impacted by steel rebars. Shrinkage occurs when concrete contracts as it dries and hardens, while creep refers to the long-term deformation of concrete under sustained load. The presence of steel rebars in concrete has two main effects on its overall shrinkage. Firstly, the rebars provide resistance against shrinkage by countering the tensile forces that arise during drying. This resistance limits the volume change of the concrete, minimizing shrinkage. Secondly, the rebars act as a barrier to moisture movement, thus restricting the drying and shrinkage of the concrete. Nevertheless, the addition of steel rebars can also influence the creep behavior of the concrete. Creep is influenced by the material's modulus of elasticity and strength, both of which can be altered by the presence of steel rebars. The high modulus of elasticity and strength of the rebars can lead to higher levels of creep in the concrete, as there can be differential deformation between the concrete and the steel. Furthermore, the bond between the rebars and the concrete also affects the creep behavior. The strength of this bond influences the transfer of stress from the concrete to the rebars, thereby impacting the overall creep behavior of the composite material. In conclusion, steel rebars can reduce concrete shrinkage by providing resistance against drying and limiting moisture movement. However, they can also influence the creep behavior of the concrete due to factors such as modulus of elasticity, strength, and bond strength between the rebars and the concrete. Understanding the interaction between steel rebars and concrete is essential for designing structures that can withstand shrinkage and creep effects.
- Q: How do steel rebars affect the fire resistance of a structure?
- Steel rebars can have both positive and negative effects on the fire resistance of a structure. On one hand, steel rebars can enhance the fire resistance of a structure by providing additional strength and stability. The presence of steel rebars in concrete structures can help prevent collapse during a fire, allowing more time for occupants to evacuate and emergency responders to control the situation. However, steel rebars also have some drawbacks when it comes to fire resistance. Steel is a highly conductive material, meaning it can transfer heat quickly. During a fire, the steel rebars can heat up and transfer the heat to the surrounding concrete, potentially weakening its structural integrity. This can result in a reduced fire resistance of the structure. To mitigate the negative effects of steel rebars on fire resistance, certain measures can be taken. One common approach is to apply fire-resistant coatings or wraps to the steel rebars. These coatings or wraps act as a barrier, slowing down the heat transfer from the steel to the concrete, thus enhancing the fire resistance. Additionally, the size, spacing, and arrangement of steel rebars can also impact the fire resistance of a structure. Proper design and placement of rebars can ensure that the heat is distributed more evenly, reducing the risk of localized weakening and structural failure. In summary, steel rebars can have a significant impact on the fire resistance of a structure. While they can enhance the overall strength and stability, they can also contribute to the heat transfer and potential weakening of the structure. By implementing appropriate measures such as fire-resistant coatings and proper design, the negative effects of steel rebars on fire resistance can be minimized, ensuring the safety and integrity of the structure during a fire.
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Deformed Steel Bar / Hot Rolled Ribbed Bars
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT or LC
- Min Order Qty:
- 500 m.t.
- Supply Capability:
- 5000 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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