GR40 deformed steel bar for construction

GR40 deformed steel bar for construction System 1

GR40 deformed steel bar for construction

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 10000 m.t./month

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Product Description:

Theoretical weight and section area of each diameter as below for your information:

Diameter(mm)	Section area (mm²)	Mass(kg/m)	Weight of 12m bar(kg)
6	28.27	0.222	2.664
8	50.27	0.395	4.74
10	78.54	0.617	7.404
12	113.1	0.888	10.656
14	153.9	1.21	14.52
16	201.1	1.58	18.96
18	254.5	2.00	24
20	314.2	2.47	29.64
22	380.1	2.98	35.76
25	490.9	3.85	46.2
28	615.8	4.83	57.96
32	804.2	6.31	75.72
36	1018	7.99	98.88
40	1257	9.87	118.44
50	1964	15.42	185.04

Usage and Applications of Construction

1. Construction steel round bar is mostly used for straight bundles supply, and used for steel, bolts and various mechanical parts. While the bigger round bar, or more than 25mm hot rolled bar, is mainly for the manufacture of mechanical parts or for seamless steel billet.

2. Steel round bar is used in construction and a large number of architectural and engineering structures.

3. Besides, we can supply some especial material steel round bar that can be used for main shaft of steamer, hummer shank, with big section and supper force.

Packaging & Delivery

Packaging Detail: All goods are packed in bundle with steel strips and shipped by break bulk vessel or container (depend on target market and different ports)

Delivery Detail: 45 days

Trade terms: FOB, CFR, CIF

MOQ: 25 tons per specification; we can negotiate the quantity if the specification is normal or we have stock of one specification.

Weight: Theprice invoicing on theoretical weight basis or actual weight basis depends on customer’s request.

Shipment: The shipment of bulk break or container is depends on customer’s request and the situation of the port of destination.

Documents given: Full set of original clean on board bill of lading; Original signed commercial invoice; Original packing list; Policy of insurance; Certificate of origin and what the target market needs.

GR40 deformed steel bar for construction

Q:How do steel rebars affect the overall construction schedule?: Steel rebars can have a significant impact on the overall construction schedule. They are essential components in concrete structures, providing strength and stability. However, their installation can be time-consuming as it requires careful placement and securing. Delays in rebar installation can potentially affect subsequent construction activities, such as concrete pouring and curing. Therefore, efficient planning and coordination of rebar installation are crucial to ensure the construction schedule remains on track.

Q:How do steel rebars improve the structural integrity of a building?: Steel rebars, also known as reinforcement bars, play a crucial role in enhancing the structural integrity of buildings. They are used in concrete construction to provide strength, durability, and resistance to various forces that a structure may encounter. One key way steel rebars improve the structural integrity of a building is by increasing its load-bearing capacity. When concrete is reinforced with rebars, it becomes more capable of withstanding heavy loads and forces such as those generated by gravity, wind, earthquakes, or even dynamic loads from human activities. The rebars act as a reinforcement network, distributing the load more evenly throughout the structure, preventing excessive deflection, and minimizing the risk of structural failure. Moreover, steel rebars improve the tensile strength of concrete, which is traditionally weak in tension. Concrete is great at bearing compression forces but lacks the ability to effectively resist pulling or stretching forces. By incorporating rebars into the concrete, the combination of materials works together to withstand both compression and tension forces more efficiently. This prevents cracks and fractures from propagating in the concrete, as the rebars act as a support system that holds the structure together. Another advantage of using steel rebars is their resistance to corrosion. Steel is highly durable and can withstand harsh environmental conditions, reducing the risk of degradation over time. This ensures the longevity of the building's structural elements and decreases the need for costly repairs or replacements. Additionally, steel rebars provide flexibility in design and construction. They can be molded into various shapes and sizes to accommodate specific structural requirements, making it possible to optimize the distribution of reinforcement where it is needed most. This flexibility allows architects and engineers to design buildings that are both aesthetically pleasing and safe, without compromising on structural integrity. In conclusion, steel rebars significantly improve the structural integrity of buildings by increasing load-bearing capacity, enhancing tensile strength, resisting corrosion, and providing design flexibility. By reinforcing concrete, they ensure that structures are better equipped to withstand various forces and maintain their stability and safety over time.

Q:Can steel rebars be bent without compromising their strength?: Steel rebars possess the ability to be bent while still maintaining their strength. Their high tensile strength enables them to endure the forces of bending and stretching without experiencing any breakage or loss of structural integrity. The process of bending involves the application of a regulated amount of force to the rebar, causing the material to deform and acquire a new shape. However, it is essential to adhere to the recommended limits and guidelines provided by the manufacturer or industry standards when carrying out the bending procedure. Exceeding the specified limits may result in the development of microcracks or other defects that can compromise the strength of the rebar. Therefore, it is of utmost importance to employ proper bending techniques and utilize suitable equipment to ensure that the steel rebars retain their strength even after being bent.

Q:What are the different methods of reinforcing concrete with steel rebars?: Steel rebars are commonly used to reinforce concrete in several different ways, each designed to improve the strength and longevity of the structure. Here are some of the methods employed: 1. Traditional Reinforcement: To reinforce concrete using this method, steel rebars are placed in a grid pattern within the concrete formwork prior to pouring. Both horizontal and vertical rebars are arranged to create a network of reinforcement throughout the structure. This technique is frequently utilized in large-scale concrete structures like buildings and bridges. 2. Post-Tensioning: This technique is employed in large structures requiring high tensile strength. After the concrete has been poured and hardened, steel rebars are placed in ducts or sleeves within the concrete and subsequently tensioned using hydraulic jacks. This process reduces tensile stresses in the concrete, making it more resistant to cracking and increasing its load-bearing capacity. 3. Pre-Tensioning: Similar to post-tensioning, pre-tensioning involves tensioning steel rebars before pouring the concrete. The rebars are placed in a precast concrete form and tensioned using hydraulic jacks. Once the concrete has hardened, the tensioned rebars transfer their force to the concrete, enhancing its strength and reducing the risk of cracking. 4. Welded Wire Mesh: Instead of individual rebars, this method employs a grid of welded steel wires to reinforce the concrete. The mesh, made of high-strength steel wires, is welded together at intersections. This technique is commonly used in smaller concrete structures like sidewalks, driveways, and patios. Welded wire mesh provides uniform reinforcement throughout the concrete, minimizing the risk of cracking. 5. Fiber Reinforced Concrete: Fiber reinforced concrete (FRC) involves adding small fibers made of materials like steel, glass, or synthetic polymers to the concrete mix. These fibers are distributed throughout the mix, improving its tensile strength and reducing the likelihood of cracking. FRC is often used in situations where traditional steel rebars are unsuitable, such as thin slabs, precast elements, or shotcrete. Overall, these diverse methods allow engineers and construction professionals to enhance the strength, durability, and performance of concrete structures. The choice of method depends on factors like the structure's size and type, required strength, and construction constraints. It is crucial to consider these factors and consult with engineering professionals to determine the most suitable method for each specific project.

Q:What are the different types of tests conducted on steel rebars for quality assurance?: There are several types of tests conducted on steel rebars for quality assurance. Some common tests include tensile testing, bend testing, impact testing, hardness testing, and chemical composition analysis. These tests help ensure that the rebars meet the required mechanical properties, dimensional tolerances, and chemical composition standards, ensuring their quality and suitability for various construction applications.

Q:How are steel rebars protected against extreme weather conditions?: Various methods are employed to safeguard steel rebars from extreme weather conditions. One prevalent technique involves the application of protective coatings, which act as a barrier between the rebar and the environment, preventing exposure to moisture, oxygen, and other corrosive elements. These coatings can consist of epoxy, zinc, or concrete-based materials. Another method of protection entails the incorporation of corrosion inhibitors into the concrete during the mixing process. These inhibitors create a protective layer on the rebar's surface, hindering the infiltration of moisture and corrosive substances. Furthermore, ensuring an adequate thickness of concrete cover is imperative for shielding rebars against harsh weather elements. This cover acts as a physical barrier, impeding the access of moisture and corrosive agents to the steel. Moreover, design considerations are taken into account to protect rebars from extreme weather conditions. In areas prone to severe weather or high humidity, engineers may specify the use of stainless steel rebars or epoxy-coated rebars due to their enhanced corrosion resistance properties. Regular maintenance and inspections are also crucial for the long-term protection of rebars against extreme weather conditions. By conducting inspections, any signs of corrosion or damage can be identified promptly, enabling timely repairs and preventative measures. In conclusion, the protection of steel rebars from extreme weather conditions is achieved through the application of protective coatings, the incorporation of corrosion inhibitors, the provision of proper concrete cover, and the consideration of design factors. Regular maintenance and inspections are vital for ensuring their ongoing protection.

Q:How do steel rebars affect the bond strength between concrete and reinforcement?: Steel rebars play a crucial role in enhancing the bond strength between concrete and reinforcement. The presence of rebars in concrete structures creates a mechanical interlock between the two materials, resulting in a stronger and more durable bond. Firstly, rebars provide a larger surface area for the concrete to adhere to. The rough texture of the steel surface allows the fresh concrete to bond effectively, creating a strong bond. This increased surface area also helps to distribute loads more evenly, reducing stress concentrations and enhancing the overall structural integrity of the concrete. Secondly, rebars act as a load transfer medium, transmitting forces between the concrete and reinforcement. As the concrete experiences tensile forces, which it is inherently weak in resisting, the rebars bear these forces and effectively carry them across the concrete-rebar interface. This prevents cracks from propagating and helps to maintain the overall stability and strength of the structure. Moreover, the presence of rebars helps to control cracking in concrete. As the concrete undergoes shrinkage or temperature variations, it tends to crack. However, with the presence of rebars, these cracks are restricted or minimized. The rebars act as reinforcement, holding the concrete together and preventing crack propagation. Additionally, steel rebars improve the bond strength by providing anchorage. The embedment of rebars into the concrete creates a mechanical connection, preventing the rebar from slipping or pulling out. This anchorage ensures that the bond between the concrete and reinforcement remains intact, even under high loads or external forces. In summary, steel rebars significantly enhance the bond strength between concrete and reinforcement. They provide a larger surface area for adhesion, act as load transfer mediums, control cracking, and offer anchorage, ensuring a stronger and more durable bond. Their presence contributes to the overall stability and longevity of concrete structures.

Q:How do steel rebars provide flexibility to concrete structures?: Steel rebars provide flexibility to concrete structures in several ways. Firstly, steel rebars are used to reinforce concrete, which helps to increase the tensile strength of the structure. Concrete is strong in compression but weak in tension. By adding steel rebars, the concrete becomes more resistant to bending and cracking, as the rebars can absorb the tensile forces that would otherwise cause the concrete to fail. This reinforcement allows concrete structures to withstand greater loads and provides flexibility by preventing excessive deformation or collapse. Secondly, steel rebars can be used to create a reinforced concrete frame, which enhances the overall flexibility of the structure. The rebars, when embedded in the concrete, form a network of interconnected elements that distribute the applied loads more evenly. This network acts as a flexible skeleton that can adapt to different stresses, such as changes in temperature, ground movements, or dynamic forces. Consequently, the structure can accommodate slight movements or vibrations without suffering significant damage. Moreover, steel rebars can be strategically placed in areas where additional flexibility is required. For example, in seismic-prone regions, rebars can be concentrated in critical areas such as the joints or corners of a building. This placement helps to dissipate the energy generated during an earthquake, allowing the structure to deform and absorb the seismic forces without collapsing. This flexibility provided by the steel rebars helps to enhance the seismic resistance of the concrete structure. In summary, steel rebars provide flexibility to concrete structures by increasing their tensile strength, creating a reinforced concrete frame, and allowing for strategic placement to enhance specific areas of flexibility. This flexibility helps concrete structures withstand various loads, adapt to different stresses, and improve their overall strength and durability.

Q:What are the guidelines for preventing steel rebars from rusting during construction delays?: To prevent steel rebars from rusting during construction delays, it is important to follow some guidelines: 1. Proper Storage: Store the rebars in a covered and dry area away from moisture and direct sunlight. The storage area should be well-ventilated to prevent condensation. 2. VCI (Volatile Corrosion Inhibitor) Products: Use VCI products such as VCI paper, films, or emitters. These products release corrosion-inhibiting chemicals that create a protective layer on the rebars, preventing rust formation. 3. Proper Packaging: If rebars are being transported or stored for an extended period, ensure they are properly packaged. Wrap the rebars tightly with VCI paper or plastic sheets, and secure the packaging with tape to prevent moisture ingress. 4. Dehumidification: Use dehumidifiers in areas where the rebars are stored to reduce humidity levels. This helps in maintaining the dryness of the surrounding environment and prevents condensation on the rebars. 5. Regular Inspection: Periodically inspect the rebars for any signs of rust formation. If rust is detected, it should be immediately cleaned and treated with anti-corrosion coatings to prevent further damage. 6. Protective Coatings: Apply anti-corrosion coatings on rebars to provide an additional protective layer. These coatings can be epoxy-based or zinc-based, depending on the environmental conditions and project requirements. 7. Remove Standing Water: Ensure that there is no standing water near the rebars, as it can accelerate the rusting process. Proper drainage systems should be in place to prevent water accumulation. 8. Monitoring: Regularly monitor the environmental conditions, including temperature and humidity levels, to identify any potential risks for rust formation. Adjust the storage conditions accordingly, if needed. By following these guidelines, construction delays can be managed effectively, and the steel rebars can be protected from rust formation, ensuring the structural integrity of the project.

Q:How do steel rebars contribute to the structural soundness of a building?: Steel rebars are crucial components in the construction industry as they play a significant role in ensuring the structural soundness of buildings. These reinforcing bars, commonly known as rebars, are made of steel and are embedded within concrete to provide additional strength and reinforcement. One of the primary ways steel rebars contribute to the structural soundness of a building is by increasing its tensile strength. While concrete is excellent when it comes to handling compressive forces, it is relatively weak in terms of tension. When a building is subject to various loads, such as those caused by wind, earthquakes, or even its self-weight, it experiences both compressive and tensile forces. By adding steel rebars to concrete, the tensile strength of the overall structure is significantly enhanced. This prevents the concrete from cracking or failing under tension, ensuring the building's stability and durability over time. Furthermore, steel rebars also improve the overall ductility of a building. Ductility refers to the ability of a material to deform under stress without fracturing. Concrete, being a brittle material, lacks ductility and tends to fail abruptly when subjected to excessive stress. By incorporating steel rebars, the concrete-reinforced structure gains the ability to absorb and distribute energy, allowing it to undergo controlled deformations without sudden failure. This increased ductility ensures that the building can withstand dynamic loads, such as those generated during an earthquake, and reduces the risk of catastrophic collapse. In addition to improving tensile strength and ductility, steel rebars also enhance the overall stability and load-bearing capacity of a building. By distributing the load more evenly across the structure, they help to minimize localized stress concentrations, preventing potential weaknesses or failure points. This distributed load-bearing capacity ensures that the building can support its intended weight and withstand the forces acting upon it. Moreover, steel rebars also contribute to the longevity of a building by providing protection against corrosion. Steel is vulnerable to rust when exposed to moisture and air, which can weaken its structural integrity. However, rebars are often coated with epoxy or other anti-corrosion materials to prevent rusting. This protective layer ensures that the steel remains intact and maintains its strength over time, further enhancing the structural soundness of the building. In summary, steel rebars play a vital role in ensuring the structural soundness of a building. They increase the tensile strength of concrete, improve its ductility, enhance load-bearing capacity, and protect against corrosion. By incorporating steel rebars, buildings can withstand various loads, resist cracking, and ensure long-term stability and durability.

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