GB STANDARD HIGH QUALITY HOT ROLLED STEEL REBAR
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 100000 m.t./month
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Product Description:
Specifications of Hot Rolled Steel Rebar:
The production process of Steel Rebar
1-Waling beam furnace 2-Roughing rolling group 3-Intermediate rolling train
4-Finishing rolling group 5-Water-cooling device 6-Walking beam cooler
7-Finishing equipment(including the cold scale shear,short feet collection system,
automatic counting device,bundling machine, collect bench)
Usage and Applications of Hot Rolled Steel Rebar:
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 Hot Rolled Steel Rebar:
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 terms: TT payment in advance or Irrevocable LC at sight.
Trade terms :FOB, CFR, CIF
Label:to be specified by customer, generally, each bundle has 1-2 labels
Note:
1. Our products are produced according to national standard (GB), if not, supply according to national standards (GB) or agreement as customer required.
2. Other Grade and Standard Deformed Steel Bar we can supply:
Grade: GR40/GR60, G460B/B500A/B500B/B500C,BST500S
Standard: ASTM, BS, DIN
The Minimum Order Quantity of these products is high, and need to be confirmed.
3. We can not only supply Deformed Steel Bar; if you need anything about building materials, please contact us for further information.
4. Please send us your detail specifications when inquire. We will reply to you as soon as possible. We sincerely hope we can establish a long stable business relationship.
- Q:What is the role of steel rebars in preventing concrete creep?
- The role of steel rebars in preventing concrete creep is crucial. Concrete creep refers to the gradual deformation or movement of concrete over time under sustained load. This phenomenon occurs due to the long-term stress on the concrete, causing it to slowly deform and creep. Steel rebars, which are reinforced steel bars, are used in concrete structures to counteract this creep behavior. They play a significant role in preventing concrete creep by providing tensile strength and reinforcing the structure. When concrete is subjected to a load, it experiences both compressive and tensile forces. While concrete is excellent at withstanding compressive forces, it is relatively weak in tension. This is where steel rebars come into play. By placing steel rebars within the concrete, the tensile strength of the structure is significantly enhanced. Steel has high tensile strength, making it ideal for bearing the tension experienced by the concrete. When the concrete begins to creep under a sustained load, the steel rebars resist the deformation and distribute the tensile forces throughout the structure. The presence of steel rebars helps to restrain the concrete from excessive deformation, reducing the potential for long-term creep. By reinforcing the concrete with steel rebars, the structure becomes more resistant to creep and maintains its stability and integrity over time. Moreover, steel rebars also enhance the overall durability and structural performance of the concrete. They improve the load-bearing capacity, prevent cracking, and enhance the resistance against external forces such as earthquakes or environmental factors. In conclusion, steel rebars play a vital role in preventing concrete creep by providing tensile strength and reinforcing the structure. They resist the deformation of the concrete under sustained load, ensuring its stability and long-term integrity. The use of steel rebars significantly enhances the durability and structural performance of concrete structures, making them more resistant to creep and other potential issues.
- Q:What are the different types of steel rebars used in high-rise buildings?
- The different types of steel rebars commonly used in high-rise buildings include carbon steel rebars, epoxy-coated rebars, stainless steel rebars, and galvanized rebars. These rebars have varying properties and are chosen based on factors like strength, corrosion resistance, and durability to ensure structural integrity and safety in the building's construction.
- Q:What are the different methods for cutting steel rebars on-site?
- There are several methods for cutting steel rebars on-site, including the use of a manual rebar cutter, a portable electric rebar cutter, a hydraulic rebar cutter, or a gas-powered rebar cutter. Each method has its advantages and limitations, depending on the specific requirements of the project.
- Q:What is the difference between hot-rolled and cold-worked steel rebars?
- Hot-rolled steel rebars are made by heating the steel billets to high temperatures and then rolling them into the desired shape, resulting in a rougher surface texture. On the other hand, cold-worked steel rebars are produced at room temperature, undergoing processes like cold drawing or cold rolling, which improve the surface finish and dimensional accuracy. Cold-worked rebars are often used in applications where a smoother surface is required, such as in concrete reinforcement or in the manufacturing of precision components.
- Q:What is the maximum length of steel rebars available?
- The maximum length of steel rebars available varies depending on the specific manufacturer and supplier. However, in general, steel rebars are commonly available in lengths ranging from 6 meters (20 feet) to 18 meters (60 feet). These lengths are determined by factors such as transportation logistics, handling capabilities, and construction industry standards. It is important to consult with the manufacturer or supplier to determine the specific maximum length of steel rebars they offer.
- Q:How do steel rebars affect the overall structural integrity of a building?
- Steel rebars play a crucial role in enhancing the overall structural integrity of a building. By reinforcing and strengthening concrete structures, rebars effectively distribute loads and resist tension, preventing cracks and structural failures. This reinforcement enables buildings to withstand various forces, such as earthquakes and high winds, ensuring their stability and durability over time.
- Q:Can steel rebars be used in road construction?
- Yes, steel rebars can be used in road construction. Steel rebars are commonly used as reinforcement in concrete structures, including roads and highways, to enhance their strength and durability. They provide additional support to withstand heavy traffic loads and prevent cracking or deformation of the road surface.
- Q:What are the factors that can cause corrosion in steel rebars?
- There are several factors that can contribute to the corrosion of steel rebars. Firstly, exposure to moisture and oxygen is a significant factor in the corrosion process. When moisture comes into contact with the surface of the steel rebar, it initiates an electrochemical reaction with the oxygen in the air, leading to the formation of rust. This reaction is accelerated in environments with high humidity or constant exposure to water, such as coastal areas or structures submerged in water. Another factor that can cause corrosion is the presence of chloride ions. Chlorides, commonly found in seawater, deicing salts, or industrial environments, can penetrate the protective oxide layer on the steel rebar, making it more susceptible to corrosion. Once the chloride ions reach the metal surface, they initiate the breakdown of the passive film, allowing the corrosion process to occur more rapidly. The pH level of the environment is also crucial. Steel rebars are more prone to corrosion in highly acidic or alkaline conditions. Acidic environments, such as those found in industrial areas with high air pollution or chemical exposure, can rapidly corrode the steel. On the other hand, alkaline conditions, often found in concrete structures due to the presence of cement, can lead to the formation of a highly alkaline environment on the surface of the rebar, causing the breakdown of the protective oxide layer and promoting corrosion. Additionally, the presence of other contaminants or impurities can accelerate the corrosion process. Sulfur compounds, for example, can react with the steel rebar, leading to the formation of sulfide corrosion products that weaken the structure. Similarly, exposure to certain organic compounds or acids can also contribute to corrosion. Lastly, the design and maintenance of structures can also play a role in the corrosion of steel rebars. Insufficient concrete cover or poor quality concrete can allow moisture and oxygen to reach the steel more easily, increasing the likelihood of corrosion. Lack of proper maintenance, such as failure to repair cracked or damaged concrete, can also lead to water infiltration and subsequent corrosion of the rebars. In conclusion, factors such as moisture and oxygen exposure, chloride ions, pH level, presence of contaminants, and inadequate design or maintenance can all contribute to the corrosion of steel rebars. Understanding and addressing these factors is crucial in ensuring the durability and longevity of structures that incorporate steel rebars.
- Q:What does it mean to have 22 4GJ on the threaded steel?
- The brand of steel is expressed in terms of Arabia numerals or Arabia numerals plus English letters. HRB335, HRB400 and HRB500 are represented by 3, 4 and 5, respectively. HRBF335, HRBF400 and HRBF500 are represented by C3, C4 and C5 respectively. The name of the factory is expressed in Chinese phonetic prefix. Nominal diameter mm Arabia digital representation.
- Q:What are the limitations of using steel rebars?
- There are several limitations associated with using steel rebars in construction projects. Firstly, steel rebars are susceptible to corrosion. When exposed to moisture and oxygen, they can start to rust over time. This corrosion weakens the rebars and compromises the structural integrity of the concrete. To mitigate this issue, rebars are usually coated with epoxy or other protective coatings, but these coatings can deteriorate over time and require maintenance. Secondly, steel rebars have a high thermal expansion coefficient. This means that they expand and contract significantly with changes in temperature. This can lead to stress and cracking in the concrete, particularly in regions with extreme temperature variations. To minimize these effects, engineers often use expansion joints or other techniques to accommodate the thermal expansion of the rebars. Additionally, steel rebars are heavy and can be challenging to handle and transport. Their weight can increase the overall weight of the structure, which may require additional support or reinforcement. Moreover, the transportation of steel rebars to construction sites can be costly and time-consuming. Furthermore, steel rebars are a finite resource and their production has an environmental impact. The extraction and production of steel require significant amounts of energy and can contribute to greenhouse gas emissions. Additionally, the depletion of natural resources required for steel production is a concern. Lastly, steel rebars are conductive to heat and electricity, which can pose safety risks in certain situations. For example, in areas prone to lightning strikes, the presence of steel rebars can increase the likelihood of electrical damage. In conclusion, while steel rebars are widely used in construction due to their strength and durability, they have limitations such as susceptibility to corrosion, thermal expansion issues, high weight, environmental impact, and electrical conductivity. It is crucial for engineers and architects to consider these limitations and employ appropriate measures to address them in construction projects.
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GB STANDARD HIGH QUALITY HOT ROLLED STEEL REBAR
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 100000 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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