Steel Rebar Strips For Building Construction

Steel Rebar Strips For Building Construction

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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: What is the role of steel rebars in pile foundation construction?: Pile foundation construction heavily relies on steel rebars, as they serve a vital purpose. These foundations are designed to shift the weight of a structure to deeper layers of soil or rock, ensuring stability and preventing any settling. Steel rebars are utilized in this process to reinforce the concrete piles, thereby increasing their strength and durability. The primary function of steel rebars within pile foundation construction is to provide tensile strength to the concrete. Although concrete is strong under compression, it lacks the ability to withstand tension. By incorporating steel rebars into the concrete, it creates a reinforced structure capable of withstanding both compression and tension forces. In addition, steel rebars play a significant role in preventing cracking and providing structural integrity to the piles. As the piles are subjected to various loads, including vertical and lateral forces, the rebars distribute these loads evenly, preventing any cracking or failure of the concrete under stress. This ensures the stability and longevity of the pile foundation. Moreover, steel rebars contribute to the overall performance of the piles. They enhance the load-carrying capacity of the foundation, enabling it to support heavier structures or loads. The rebars also improve the resistance of the piles against external factors such as earthquakes, wind loads, and soil movement. In summary, steel rebars are essential in pile foundation construction, providing tensile strength, preventing cracking, and enhancing the overall performance and durability of the foundation. Their utilization ensures efficient load transfer and stability, making them an integral component in the construction of robust and dependable structures.

Q: Can steel rebars be used in earthquake-resistant buildings?: Yes, steel rebars can be used in earthquake-resistant buildings. Steel rebars are commonly used in construction to reinforce concrete structures, providing strength and durability. In earthquake-resistant buildings, steel rebars are strategically placed to distribute and absorb the seismic forces generated during an earthquake, preventing structural failure and reducing the risk of collapse. This reinforcement helps to enhance the overall stability and resilience of the building, making it more resistant to seismic activity.

Q: What is the effect of aging on the properties of steel rebars?: The properties of steel rebars can be impacted both positively and negatively by the process of aging. Aging involves gradual changes in the microstructure and mechanical properties of the rebars over time. One positive effect of aging is the enhancement of strength and hardness. Aging causes the carbon atoms in the steel to form carbides, resulting in increased strength. This strength improvement is advantageous in structural applications as it provides additional support and resistance against external forces and loads. On the other hand, aging can also have detrimental effects on steel rebars. As the rebars age, they become more vulnerable to corrosion. The formation of carbides during aging creates areas of low carbon content, known as decarburization, which increases the likelihood of rust and corrosion. This compromises the structural integrity of the rebars and reduces their lifespan. Moreover, aging can make the steel rebars more brittle. Changes in the microstructure during aging lead to increased brittleness and decreased ductility. This makes the rebars more prone to cracking and failure, especially under excessive loads or extreme temperatures. In conclusion, aging has a complex impact on the properties of steel rebars, with both positive and negative consequences. While aging can strengthen the rebars, it also raises the risk of corrosion and embrittlement. Proper maintenance and monitoring are crucial to mitigate the negative effects of aging and ensure the long-term performance and durability of steel rebars in structural applications.

Q: How do steel rebars improve the flexural strength of concrete?: Steel rebars improve the flexural strength of concrete by providing reinforcement and resisting tensile forces. Concrete is a strong material in compression but relatively weak in tension. When subjected to bending or other flexural stresses, concrete tends to crack and fail due to its limited tensile strength. By adding steel rebars to the concrete, the composite material gains enhanced flexural strength. The rebars act as a reinforcement by absorbing the tensile forces and distributing them throughout the structure. When the concrete is subjected to bending, the rebars resist the tension, preventing the formation and propagation of cracks. The rebars are typically placed in areas where tensile stresses are expected, such as the bottom of a beam or the tension face of a slab. They are designed to provide sufficient strength to carry the tensile forces and prevent the concrete from failing. The bond between the rebars and the concrete is crucial to ensure effective load transfer from the concrete to the steel reinforcement. Additionally, the use of rebars allows for the design of thinner and more efficient concrete elements. By providing the necessary tensile strength, the amount of concrete required can be reduced, resulting in cost savings and lighter structures. The combination of concrete and steel rebars maximizes the material properties of both components, creating a composite material that is strong in both compression and tension. Overall, steel rebars improve the flexural strength of concrete by reinforcing it against tensile forces, preventing cracking and failure. This reinforcement allows for the design of more efficient and durable structures.

Q: What are the factors that determine the strength of steel rebars?: Several factors contribute to the strength of steel rebars. Firstly, the composition of the steel used in their manufacture plays a crucial role. The presence of elements like carbon, manganese, and silicon significantly impacts the steel's strength by enhancing its ability to resist tension and provide structural stability. Secondly, the manufacturing process of rebars influences their strength. Quenching and tempering, a process involving rapid cooling after heating, is typically employed to achieve the desired strength. The precise temperature and duration of this process affect the grain structure and chemical properties of the steel, thereby impacting the rebars' strength. The size and shape of rebars also affect their strength. The diameter and length of a rebar determine its load-bearing capacity. Thicker and longer rebars generally possess higher strength as they can withstand greater stress and distribute it more effectively. Furthermore, the presence of impurities or defects in the steel can weaken rebars. Cracks, voids, or inclusions compromise the structural integrity of the rebar and reduce its strength. Finally, environmental conditions must be considered when determining the strength of rebars. Factors like temperature, humidity, and exposure to corrosive substances can impact their strength over time. Taking precautions, such as using corrosion-resistant coatings or stainless steel rebars, is essential to ensure the longevity and strength of rebars in such environments. In conclusion, the strength of steel rebars depends on the composition of the steel, the manufacturing process, the size and shape of the rebars, the presence of defects, and the environmental conditions in which they will be used. Considering these factors is crucial to ensure the durability and reliability of steel rebars in construction applications.

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 include ensuring a moist and controlled environment for the concrete to cure. This can be achieved by covering the concrete with a plastic sheet or using curing compounds. It is important to avoid rapid drying or exposure to extreme temperatures during the curing process. Additionally, regular monitoring of the curing process and proper hydration of the concrete are crucial to ensure the rebars bond effectively with the concrete and achieve maximum strength.

Q: How do steel rebars affect the overall fire resistance of concrete structures?: Steel rebars have a significant impact on the overall fire resistance of concrete structures. Steel rebars, also known as reinforcement bars, are used in concrete structures to provide strength and stability. When exposed to fire, the behavior of steel rebars can either enhance or compromise the fire resistance of the concrete structure. The addition of steel rebars in concrete has a favorable effect on the fire resistance of the structure. The high thermal conductivity of steel helps to dissipate the heat generated during a fire, preventing localized overheating and reducing the risk of structural failure. This dispersal of heat through the steel rebars slows down the rate of temperature rise in the concrete, providing additional time for evacuation and firefighting efforts. Moreover, the presence of steel rebars also helps to maintain the structural integrity of the concrete during a fire. Concrete has low tensile strength, and when exposed to high temperatures, it tends to crack and spall. However, the presence of steel rebars helps to mitigate this problem. The rebars act as reinforcement, holding the concrete together and preventing it from falling apart under the influence of heat. However, it is important to note that steel rebars can also have a negative impact on fire resistance if not properly designed or protected. If the size and spacing of the rebars are inadequate, it can result in a rapid transfer of heat through the concrete, leading to premature failure. Additionally, if the rebars are not adequately protected with fire-resistant materials, they can lose their strength and integrity, further compromising the overall fire resistance of the structure. To ensure optimal fire resistance, designers and engineers take into account various factors such as the size, spacing, and coating of the steel rebars, as well as the concrete cover thickness. Additionally, fireproofing measures such as the use of intumescent coatings, fire-resistant insulation, and fireproof claddings can be employed to enhance the fire resistance of steel rebars and the overall concrete structure. In conclusion, steel rebars play a crucial role in the fire resistance of concrete structures. When appropriately designed and protected, they can enhance the fire resistance by dissipating heat and maintaining structural integrity. However, inadequate design or lack of protection can compromise the fire resistance. Therefore, it is essential to follow proper design guidelines and implement appropriate fireproofing measures to ensure the overall fire safety of concrete structures.

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 do steel rebars impact the overall construction cost estimation process?: The overall construction cost estimation process is significantly influenced by steel rebars. These reinforcing bars play a crucial role in reinforced concrete structures, providing strength and durability to the building. Consequently, including them in the cost estimation is essential for accurately assessing the total project cost. To begin with, the material cost of the construction project is impacted by steel rebars. Rebars are typically priced based on weight, so the quantity and size of rebars required directly affect the material cost estimation. Accurately identifying and quantifying rebars is necessary to ensure an appropriate budget allocation for the project. Furthermore, labor cost estimation is also influenced by steel rebars. Skilled labor is required to install rebars, and the time and effort involved in cutting, bending, and placing the rebars must be taken into account. The complexity of the reinforcement design, such as intricate shapes or complex detailing, can increase labor costs. Therefore, accurately estimating rebars allows for better planning of labor resources and cost allocation. In addition to material and labor costs, steel rebars impact other aspects of the construction cost estimation process. For example, the weight and placement of rebars affect the structural design, which can influence the cost estimation of the concrete mix design and formwork requirements. The size and spacing of rebars may also impact the excavation and foundation costs, as well as the overall project timeline. Moreover, steel rebars contribute to the long-term costs of the construction project. The quality and durability of rebars directly affect the lifespan and maintenance requirements of the structure. Investing in high-quality rebars can reduce future maintenance and repair costs, as well as enhance the overall life cycle cost analysis of the project. To conclude, the overall construction cost estimation process is significantly impacted by steel rebars. Accurately estimating rebars is essential for determining material and labor costs, as well as influencing other cost-related aspects of the project. It allows for precise budget allocation, resource planning, and consideration of long-term costs, ultimately resulting in a more reliable and comprehensive construction cost estimation.

Q: What are the different methods of protecting steel rebars against corrosion?: There are several methods used to protect steel rebars against corrosion. These methods include applying a protective coating such as epoxy or zinc, using galvanized rebars, implementing cathodic protection systems, and incorporating corrosion inhibitors in the concrete mix. These techniques help to prevent the penetration of moisture and corrosive substances, prolonging the lifespan and structural integrity of the rebars.

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