Steel Ribbed Rebar In Bundles GB Standard

Steel Ribbed Rebar In Bundles GB Standard

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 100 m.t.

Supply Capability:: 100000 m.t./month

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Usage and Applications

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.

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

Packaging & Delivery

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

Cold Rolled Techniques

Yield Point: 545-565mpa

Q: How do steel rebars reinforce concrete?: The structural stability of concrete is reinforced by steel rebars, which provide additional strength. Concrete possesses strength under compression but is weak when subjected to tension. To counteract this weakness and enhance its tensile strength, steel rebars are embedded in the concrete. The rebars function as reinforcement by absorbing the tensile forces that arise when a structure undergoes bending or stretching. In the presence of such forces, the rebars evenly distribute the load across the concrete, preventing cracks and failure. This is particularly crucial in buildings, bridges, and dams, where the concrete must withstand diverse external forces. Furthermore, the rebars help regulate the expansion and contraction of the concrete resulting from temperature changes. Since steel and concrete have similar coefficients of thermal expansion, steel rebars assist in minimizing stress caused by temperature fluctuations, thus reducing the likelihood of cracking. Additionally, the bond between the steel rebars and the concrete is vital for effective reinforcement. The rough surface of the rebars ensures excellent adherence to the surrounding concrete, enabling them to function as a composite material. This bond facilitates the transfer of stress from the concrete to the rebars, thereby enhancing the overall strength and durability of the structure. To summarize, steel rebars reinforce concrete by providing tensile strength, distributing loads, controlling temperature-induced stress, and establishing a robust bond with the concrete. The combination of concrete and steel results in a reinforced concrete structure capable of withstanding various external forces and maintaining its structural integrity over time.

Q: How do steel rebars prevent cracks and structural failures?: Steel rebars prevent cracks and structural failures by providing reinforcement and enhancing the strength of concrete. When embedded in concrete, rebars act as a framework that helps distribute the load evenly, reducing stress concentrations and preventing the formation of cracks. This reinforcement ensures that the concrete structure can withstand external forces, such as heavy loads or seismic activity, thereby minimizing the risk of structural failures.

Q: Can steel rebars be bent without breaking?: Yes, steel rebars can be bent without breaking. Steel rebars are made from a strong and durable material called steel, which has excellent flexibility and tensile strength. This means that steel rebars can withstand significant bending forces without breaking or fracturing. However, it is important to note that there are limits to how much a steel rebar can be bent without causing damage. If excessive force is applied or if the rebar is bent beyond its maximum bending capacity, it may eventually break. Therefore, it is crucial to follow industry guidelines and specifications when bending steel rebars to ensure their integrity and structural performance.

Q: What is the impact of steel rebars on the overall durability of a structure?: Steel rebars have a significant impact on the overall durability of a structure. These reinforced steel bars enhance the structural integrity by providing tensile strength and resisting the forces that can cause cracking or failure. By reinforcing concrete, steel rebars increase the structure's ability to withstand external pressures, such as heavy loads, seismic activity, or weather conditions. This reinforcement ensures long-term durability, stability, and structural soundness, making steel rebars crucial for constructing resilient and long-lasting buildings and infrastructure.

Q: Are there any limitations to using steel rebars in construction?: Yes, there are some limitations to using steel rebars in construction. One limitation is their susceptibility to corrosion, especially in environments with high moisture or exposure to certain chemicals. This corrosion can weaken the rebars and potentially compromise the structural integrity of the building. Additionally, steel rebars have a high thermal conductivity, which can lead to increased heat transfer between different parts of the structure. This can result in energy loss and thermal discomfort for occupants. Lastly, steel rebars are heavy and require heavy machinery for installation, which can increase construction costs and timeframes.

Q: How are steel rebars protected against chemical attacks?: Steel rebars are protected against chemical attacks through a process called corrosion protection. This involves using various techniques and materials to prevent the rebar from coming into contact with corrosive substances that can cause chemical attacks. One common method of protection is the use of protective coatings. This involves applying a layer of material, such as epoxy or zinc, onto the surface of the rebar. These coatings act as a barrier, preventing corrosive substances from reaching the steel surface. Additionally, these coatings can provide an extra layer of protection against moisture and other environmental factors that can contribute to corrosion. Another method of protection is the use of corrosion inhibitors. These are chemicals that can be added to the concrete mix or applied directly to the rebar. Corrosion inhibitors work by forming a protective layer on the surface of the steel, which inhibits the process of corrosion. These inhibitors can be organic or inorganic compounds and are designed to target specific types of corrosion mechanisms. In some cases, stainless steel rebars are used as a measure of protection against chemical attacks. Stainless steel has a higher resistance to corrosion compared to regular steel rebars. This is due to the presence of chromium, which forms a passive layer on the surface of the steel, protecting it from chemical reactions. Stainless steel rebars are often used in highly corrosive environments, such as marine structures or wastewater treatment plants. Regular maintenance and inspection are also crucial in protecting steel rebars against chemical attacks. Any signs of damage or corrosion should be addressed promptly. Regular cleaning and removal of any corrosive substances that accumulate on the rebars can also help prevent chemical attacks. Overall, a combination of protective coatings, corrosion inhibitors, stainless steel rebars, and regular maintenance is essential in protecting steel rebars against chemical attacks. These measures help to extend the lifespan of the rebars and ensure the structural integrity of concrete structures.

Q: What factors affect the cost of steel rebars?: Several factors can affect the cost of steel rebars. The primary factors include the cost of raw materials, such as iron ore and scrap metal, as well as the cost of energy and transportation. Market demand and supply dynamics, including global economic conditions and construction activity, also play a significant role in influencing the price of steel rebars. Additionally, factors like production and labor costs, technological advancements in the manufacturing process, and government regulations can impact the overall cost.

Q: What is the quality difference between round bar and screw steel?: Physical and mechanical properties are different. Because of the different chemical composition and strength of reinforcing steel, they are different in physical and mechanical properties. The cold bending property of steel is good, can make the hook 180, screw steel can only make straight hook 90 degrees; steel weldability is good, with ordinary carbon steel electrode can be used to low alloy electrode; anti fatigue performance and toughness in steel bar is good.

Q: Are there any codes or regulations for the use of steel rebars in construction?: Yes, there are codes and regulations in place for the use of steel rebars in construction. In many countries, including the United States, the American Concrete Institute (ACI) provides guidelines and standards for the design and construction of reinforced concrete structures. The ACI 318 Building Code Requirements for Structural Concrete includes provisions for the use of steel rebars, detailing their requirements for size, placement, and quality. Similarly, the International Building Code (IBC) is widely adopted and provides regulations for construction practices in various jurisdictions. It includes provisions and references to standards that govern the use of steel rebars in reinforced concrete structures. Additionally, there are other standards organizations, such as the British Standards Institution (BSI) in the United Kingdom, which have their own codes and regulations for the use of steel rebars in construction. These codes and regulations are essential to ensure the safety and durability of structures. They specify requirements for the size, grade, and placement of rebars, as well as guidelines for the design, detailing, and construction of reinforced concrete elements. Compliance with these codes and regulations helps to ensure that structures are built to withstand the expected loads and perform as intended.

Q: What is the maximum spacing allowed between steel rebars in concrete?: The maximum spacing allowed between steel rebars in concrete varies depending on the specific project requirements and local building codes. However, as a general guideline, the maximum spacing is typically limited to three times the thickness of the concrete cover, which is the distance between the outer surface of the concrete and the nearest rebar. This ensures proper reinforcement and structural integrity of the concrete.

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