Cold Rolled Steel Rebar 14mm

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

Diameter(mm)	Section area (mm²)	Mass(kg/m)	Weight of 12m (kg)	Pcs/ton
6	28.27	0.222	2.664	375.38
8	50.27	0.395	4.74	210.97
10	78.54	0.617	7.404	135.06
12	113.1	0.888	10.656	93.84
14	153.9	1.21	14.52	68.87
16	201.1	1.58	18.96	52.74
18	254.5	2.00	24	41.67
20	314.2	2.47	29.64	33.74
22	380.1	2.98	35.76	27.96
25	490.9	3.85	46.2	21.65
28	615.8	4.83	57.96	17.25
32	804.2	6.31	75.72	13.21
36	1018	7.99	98.88	10.43
40	1257	9.87	118.44	8.44
50	1964	15.42	185.04	5.40

Cold Rolled Techniques

Yield Point: 545-565mpa

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.

Q:Can steel rebars be cut to custom lengths?: Yes, steel rebars can be cut to custom lengths. Rebars are typically available in standard lengths, but they can be easily cut to fit specific project requirements. This can be done using various tools such as an angle grinder, cutting torch, or a hydraulic rebar cutter. It is important to use proper safety measures and techniques when cutting steel rebars to ensure accurate cuts and prevent any accidents or injuries.

Q:How is steel rebar manufactured?: The process of making steel rebar, also known as reinforcing bar, involves a series of steps to ensure its high quality and durability. To begin with, raw materials such as iron ore, coal, and limestone are carefully chosen and prepared. Iron ore is extracted from mines and processed to eliminate impurities. Coal is used as a fuel to heat the iron ore, while limestone acts as a flux to remove impurities during the heating process. Once the raw materials are ready, they are combined in a blast furnace. This furnace, a large cylindrical structure, subjects the iron ore, coal, and limestone to extreme temperatures. The intense heat triggers a chemical reaction that separates the iron from impurities, resulting in molten iron. The molten iron is then transferred to either a basic oxygen furnace (BOF) or an electric arc furnace (EAF). In the BOF process, the molten iron is mixed with scrap steel and other alloys to achieve the desired steel composition. Oxygen is blown into the furnace, removing impurities and adjusting the carbon content. In the EAF process, electricity is used to melt the scrap steel and other alloys, leading to chemical reactions that modify the composition and eliminate impurities. Once the steel is produced, it is poured into continuous casting machines, which shape it into long, rectangular strands called billets. These billets go through a series of rolling mills, gradually reducing their size and shaping them into the desired cross-sectional profile. The rolling process also enhances the strength and durability of the steel. After the rolling process, the rebar undergoes quenching and tempering. This involves rapidly cooling the rebar in water to increase its hardness, followed by reheating it to a specific temperature and then slowly cooling it. This process improves the rebar's strength and ductility, making it suitable for reinforcing concrete structures. Finally, the rebar is cut into the desired lengths and often undergoes surface treatment, such as galvanization or epoxy coating, to enhance its resistance to corrosion. It is then bundled and shipped to construction sites, where it is used to reinforce concrete structures like buildings, bridges, and roads. To summarize, the production of steel rebar involves the selection and preparation of raw materials, the melting and refining of iron in a blast furnace or electric arc furnace, the shaping of the steel into billets through continuous casting and rolling, the quenching and tempering process to improve its strength and ductility, and the final cutting and surface treatment before it is ready for use in construction projects.

Q:Can steel rebars be used in underwater construction?: Yes, steel rebars can be used in underwater construction. They are commonly used in marine structures such as bridges, piers, and offshore platforms. However, specific corrosion-resistant coatings and proper installation techniques are necessary to protect the rebars from the corrosive effects of saltwater.

Q:What are the different methods for attaching steel rebars to existing structures?: There are several methods for attaching steel rebars to existing structures, depending on the specific requirements and conditions of the project. Some common methods include: 1. Welding: This method involves using welding techniques to attach the rebars to the existing structure. It provides a strong and durable connection, but it requires skilled labor and may not be suitable for all situations. 2. Epoxy bonding: Epoxy adhesives can be used to bond rebars to existing structures. This method is easy to apply and provides a reliable connection, especially when the rebars are embedded in concrete. However, it is important to ensure proper surface preparation and follow manufacturer's instructions for best results. 3. Mechanical anchoring: Mechanical anchors, such as anchor bolts or expansion anchors, can be used to attach rebars to existing structures. This method involves drilling holes into the structure and inserting the anchor, which provides a secure connection. It is important to select the appropriate anchor type and size based on the load requirements and structural conditions. 4. Clamping or fastening: In some cases, rebars can be attached to existing structures using clamps or fasteners. This method is relatively quick and easy to install, but it may not provide as strong of a connection as welding or epoxy bonding. 5. Overlapping: When reinforcing existing concrete structures, rebars can be overlapped with the existing reinforcement and tied together using wire or other methods. This method is commonly used in construction to ensure continuity of reinforcement and increase the load-carrying capacity. It is important to consult with structural engineers or professionals with expertise in rebar installation to determine the most suitable method for attaching steel rebars to existing structures. They will consider factors such as structural integrity, load requirements, and local building codes to ensure a safe and effective connection.

Q:How do steel rebars affect the shrinkage and creep behavior of concrete?: Steel rebars can significantly affect the shrinkage and creep behavior of concrete. Shrinkage refers to the contraction of concrete 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 can reduce the overall shrinkage of the concrete due to two main reasons. Firstly, the steel rebars provide a restraint against shrinkage by resisting the tensile forces that develop during drying. This restraint reduces the overall volume change of the concrete, minimizing the shrinkage. Secondly, the rebars also act as a barrier to moisture movement, limiting the drying and shrinkage of the concrete. However, the addition of steel rebars can also influence the creep behavior of concrete. Creep is influenced by the modulus of elasticity and the strength of the material, and the presence of steel rebars can alter these properties. The high modulus of elasticity and strength of steel rebars can cause the concrete to experience higher levels of creep due to the differential deformation between the concrete and the steel. Moreover, the bond between the rebars and the concrete also plays a role in affecting the creep behavior. The bond strength between the rebars and the concrete can influence the transfer of stress from the concrete to the rebars, affecting the overall creep behavior of the composite material. In summary, steel rebars can reduce the shrinkage of concrete by providing restraint against drying and minimizing moisture movement. However, they can also influence the creep behavior of concrete due to their modulus of elasticity, strength, and the bond between the rebars and the concrete. Understanding the interaction between steel rebars and concrete is crucial in designing structures that can withstand shrinkage and creep effects.

Q:Can steel rebars be used in industrial buildings?: Yes, steel rebars can be used in industrial buildings. Steel rebars are commonly used as reinforcing materials in concrete structures, providing strength and stability. In industrial buildings, where heavy loads and high durability are required, steel rebars are often used to reinforce the concrete foundation, columns, beams, and slabs. They enhance the structural integrity of the building and ensure its ability to handle the demands of industrial operations and equipment.

Q:How do steel rebars affect the overall aesthetics of a building?: Steel rebars can have a significant impact on the overall aesthetics of a building. While they are primarily used for structural purposes, their visibility can affect the visual appeal of the structure. Exposed steel rebars can create an industrial or modern aesthetic, giving a building a contemporary and edgy look. However, if not properly integrated or concealed, the presence of steel rebars can also be perceived as unsightly or unfinished, detracting from the overall aesthetics of the building.

Q:How are steel rebars protected against corrosion in aggressive environments?: Steel rebars are protected against corrosion in aggressive environments through various methods. One common method is the use of protective coatings. These coatings can be applied to the surface of rebars to create a barrier between the steel and the corrosive elements in the environment. Examples of protective coatings include epoxy, zinc, and polyethylene coatings. In addition to coatings, steel rebars can also be protected through cathodic protection. This method involves connecting the rebar to a sacrificial anode, usually made of a more reactive metal such as zinc or magnesium. The anode corrodes instead of the rebar, effectively sacrificing itself to protect the steel from corrosion. Another method of protection is the use of corrosion inhibitors. These inhibitors can be added to the concrete mix or applied directly to the rebars. They work by reducing the corrosive potential of the environment or by forming a protective film on the surface of the rebar, preventing corrosion from occurring. Furthermore, proper design and construction practices can also contribute to the protection of steel rebars against corrosion. Adequate concrete cover can help create a physical barrier between the rebar and the aggressive environment, reducing the exposure of the steel to corrosive elements. Good drainage systems and the use of non-corrosive aggregates can also help minimize the exposure of rebars to moisture and other corrosive substances. Overall, a combination of protective coatings, cathodic protection, corrosion inhibitors, and proper design and construction practices are employed to ensure the protection of steel rebars against corrosion in aggressive environments. These measures help extend the lifespan of structures and maintain their structural integrity.

Q:What are the guidelines for the proper curing of concrete with steel rebars?: The guidelines for the proper curing of concrete with steel rebars are as follows: 1. Moisture: Concrete needs to be kept moist during the curing process to ensure proper hydration and strength development. However, when curing concrete with steel rebars, it is important to prevent excessive moisture as it can cause corrosion and damage the steel. Therefore, a balance should be maintained in providing enough moisture without allowing standing water to accumulate around the rebars. 2. Covering: The steel rebars should be adequately covered with concrete during the pouring process to provide protection against corrosion. The cover thickness should be in accordance with the design specifications to ensure sufficient strength and durability. 3. Curing time: The curing time for concrete with steel rebars is typically longer than that of plain concrete. This is because the steel needs to bond with the concrete and achieve proper adhesion. The recommended curing period can vary depending on factors such as ambient temperature, humidity, and the specific type of steel used. It is important to refer to the project specifications or consult with a structural engineer to determine the appropriate curing time for the specific application. 4. Temperature control: During the curing process, temperature control is crucial to ensure uniform hydration and avoid thermal stress. Rapid temperature changes can cause cracking and compromise the integrity of the concrete. It is important to protect the concrete from extreme temperature variations and provide insulation or shading as necessary. 5. Protection from external elements: Concrete with steel rebars needs to be protected from external elements that may cause damage or corrosion. This includes protecting the concrete from exposure to chloride ions, carbonation, and chemicals. Appropriate surface coatings or sealants can be applied to provide an additional layer of protection. 6. Inspection and maintenance: Regular inspection and maintenance are essential to ensure the long-term durability of concrete with steel rebars. It is important to monitor for any signs of corrosion, cracking, or deterioration and take appropriate measures to address them promptly. This may include repairing damaged areas, applying protective coatings, or implementing corrosion prevention measures. Following these guidelines will help ensure the proper curing of concrete with steel rebars, resulting in a structurally sound and durable construction material that can withstand the test of time.

Q:How do steel rebars affect the overall crack width of concrete structures?: Steel rebars affect the overall crack width of concrete structures in several ways. Firstly, rebars provide reinforcement to the concrete, making it stronger and more resistant to cracking. The presence of rebars helps distribute the tensile forces within the concrete, preventing cracks from spreading and widening. This is because when the concrete is subjected to tensile stress, the rebars take on a significant portion of the load, reducing the stress on the concrete itself and minimizing crack formation. Moreover, the use of rebars also influences the spacing and size of cracks in concrete structures. By adding rebars at specific intervals and in appropriate sizes, engineers can control the crack width of the concrete. The rebars act as barriers that limit the width of cracks by providing resistance to the tensile forces acting on the concrete. This is particularly important in structures that are exposed to heavy loads or external forces, as it helps maintain the structural integrity and durability of the concrete. Additionally, steel rebars can also affect the propagation of cracks in concrete structures. When cracks do occur, the presence of rebars can help prevent the cracks from extending further. The rebars act as anchors, holding the cracked sections of the concrete together and preventing the cracks from spreading. This is crucial in ensuring the overall stability of the structure and minimizing the risk of structural failure. In summary, steel rebars play a vital role in influencing the overall crack width of concrete structures. They enhance the strength of the concrete, distribute tensile forces, control crack spacing and size, and prevent crack propagation. By incorporating rebars into concrete structures, engineers can effectively manage and reduce the formation and severity of cracks, ensuring the longevity and safety of the structures.

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