• Twelve mm Cold Rolled Steel Rebars with High Quality System 1
  • Twelve mm Cold Rolled Steel Rebars with High Quality System 2
  • Twelve mm Cold Rolled Steel Rebars with High Quality System 3
Twelve mm Cold Rolled Steel Rebars with High Quality

Twelve mm Cold Rolled Steel Rebars with High Quality

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Loading Port:
Tianjin
Payment Terms:
TT or LC
Min Order Qty:
50 m.t.
Supply Capability:
15000 m.t./month

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Specifications of Twelve mm Cold Rolled Steel Rebars with High Quality:

Name

Cold Rolled Steel Rebar

Diameter

5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 9mm, 10mm,

11mm, 12mm,

Length

6M, 9M, 12M or as required

Price

Keep lower operating costs so as to offer competitive price for our clients

Label

to be specified by customer, generally, each bundle has   1-2 labels

Application

Building, construction

Invoicing

Actual or Theoretical Weight Basis as buyer’s request.

 

Theoretical weight and section area of each diameter of Twelve mm Cold Rolled Steel Rebars with High Quality as below for your information:

Diameter(mm)

Section area     (mm²)

Mass(kg/m)

Weight of 12m  (kg)

Pcs/ton

12

113.04

 0.88810.65693.84

 

Packaging & Delivery of Twelve mm Cold Rolled Steel Rebars with High Quality:

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

Delivery Detail: within 45 days after received advanced payment or LC.

 

FAQ:

Q1: Why buy Materials & Equipment from OKorder.com?

A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.

Q2: How do we guarantee the quality of our products?

A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.

Q3: How soon can we receive the product after purchase?

A3: Within three days of placing an order, we will arrange production. The shipping date is dependent upon the quatity, how many sizes you want and the plan of production, but is typically 1 month to 2 month days from the beginning of production.

 

Images of Twelve mm Cold Rolled Steel Rebars with High Quality:

Twelve mm Cold Rolled Steel Rebars with High Quality

Q:What are the common mistakes to avoid when installing steel rebars?
To ensure a successful and safe installation of steel rebars, it is important to avoid several common mistakes: 1. Placing the rebars incorrectly is a frequent error that must be avoided. Accurate placement should be carried out in accordance with the engineering or construction drawings. Any deviation from the specified location can compromise the structural integrity of the reinforced concrete. 2. Insufficient concrete cover over the rebars is another mistake to avoid. The cover acts as a protective layer, preventing corrosion and providing fire resistance. Inadequate cover can lead to premature deterioration and structural failure over time. 3. Proper support for the rebars is crucial during the concrete pouring process. Insufficient support can cause sagging or movement of the rebars, resulting in an uneven distribution of steel reinforcement and compromising the structural strength of the concrete. 4. Correct alignment and spacing of the rebars according to design specifications is essential. Improper alignment can lead to congestion, difficulties in pouring concrete, and compromised bond strength between the rebar and concrete. Similarly, incorrect spacing can result in insufficient reinforcement, reducing the overall strength of the structure. 5. Thoroughly cleaning the rebars before installation is necessary to remove rust, dirt, and other contaminants. Failure to do so can lead to poor bond strength and an increased risk of corrosion, weakening the structure over time. 6. Adequate tying of the rebars using the appropriate wire or connectors is essential to maintain alignment and ensure the structural integrity of the reinforced concrete. Neglecting proper tying can result in shifting or movement during the concrete pouring process, compromising the structural strength. 7. Lack of supervision and quality control during the installation process is a common mistake. Experienced personnel should oversee the installation to ensure compliance with design specifications, proper installation techniques, and adherence to safety guidelines. By avoiding these common mistakes, the installation of steel rebars can be carried out effectively, resulting in a strong, durable, and safe reinforced concrete structure.
Q:How are steel rebars protected from fire damage?
Steel rebars are protected from fire damage through various methods. One commonly used method is the application of fire-resistant coatings. These coatings are specifically designed to withstand high temperatures and prevent the steel from reaching its critical temperature, which is when it starts to lose its structural integrity. Another method is the use of fire-resistant concrete encasement. In this method, the rebars are embedded within a layer of concrete that has been specifically designed to resist fire. This concrete acts as a barrier, preventing the heat from directly reaching the steel rebars and thus protecting them from fire damage. Additionally, fire-resistant wraps or blankets can be used to provide temporary protection to steel rebars during construction. These wraps are made from fire-resistant materials and are applied directly to the rebars, creating a barrier that prevents direct exposure to fire. It is important to note that the level of fire protection required for steel rebars depends on the specific building codes and regulations in place. These codes typically specify the minimum fire resistance rating that must be achieved for structural elements, including rebars, in order to ensure the safety of the building and its occupants.
Q:What is the effect of carbon content on the strength of steel rebars?
The carbon content in steel rebars has a significant effect on their strength. Generally, a higher carbon content leads to increased strength and hardness in the steel rebars. This is because carbon atoms form strong chemical bonds with iron atoms in the steel matrix, resulting in a more rigid and durable material. When carbon is added to the steel, it forms carbides, which are crystalline compounds that make the steel harder and stronger. The presence of these carbides increases the resistance of the steel rebars to deformation, making them suitable for applications that require high strength, such as in construction and infrastructure projects. However, it is important to note that there is a limit to how much carbon can be added to the steel rebars to improve their strength. Excessive carbon content can make the steel brittle and susceptible to cracking under stress. This is because the excessive carbon atoms can form large carbide clusters, weakening the overall structure of the steel rebars. Therefore, the carbon content in steel rebars needs to be carefully balanced to achieve the desired strength and toughness. Depending on the specific application and requirements, different carbon levels can be used to optimize the strength and performance of the steel rebars. In conclusion, the carbon content has a direct impact on the strength of steel rebars. Increasing the carbon content can improve their strength and hardness, but excessive carbon levels can lead to brittleness. Thus, finding the right balance of carbon content is crucial to ensure the optimal strength and performance of steel rebars in various construction applications.
Q:Can steel rebars be painted or coated?
Yes, steel rebars can be painted or coated. Painting or coating steel rebars helps to protect them from corrosion and extend their lifespan. It is a common practice in construction and reinforcement projects to apply paint or protective coatings on steel rebars to enhance their durability and resistance to environmental factors.
Q:What is the effect of exposure to saltwater on steel rebars?
Exposure to saltwater can have a detrimental effect on steel rebars, leading to corrosion and eventually weakening their structural integrity. Saltwater contains chloride ions that can penetrate the protective oxide layer on the surface of the steel, initiating a corrosion process. Over time, this corrosion can cause the rebars to rust, expand, and crack, compromising the strength and durability of the reinforced concrete structure they are embedded in. Therefore, it is essential to take preventive measures such as using corrosion-resistant coatings or stainless steel rebars to mitigate the negative effects of saltwater exposure.
Q:Can steel rebars be used in structures with high chemical resistance requirements?
No, steel rebars cannot be used in structures with high chemical resistance requirements as they are susceptible to corrosion and deterioration when exposed to harsh chemicals.
Q:What are the guidelines for the proper cover thickness of steel rebars?
The guidelines for the proper cover thickness of steel rebars are established to ensure the structural integrity and durability of reinforced concrete structures. The cover thickness refers to the distance between the outer surface of the rebar and the edge or surface of the concrete. The specific guidelines for cover thickness may vary depending on the design requirements, environmental conditions, and the intended use of the structure. However, there are generally accepted minimum cover thickness values provided by various international building codes and standards. The primary purpose of having an adequate cover thickness is to protect the steel rebar from corrosion caused by environmental factors such as moisture, carbonation, and chloride ingress. Corrosion can significantly weaken the rebars, compromising the structural integrity of the reinforced concrete. The recommended minimum cover thickness for steel rebars is typically determined based on the exposure conditions. For instance, in normal environmental conditions, a minimum cover thickness of 25mm to 40mm is often specified. In more aggressive environments, such as coastal areas with high chloride content or structures in contact with soil, a greater cover thickness of 50mm or more may be required. It is crucial to follow these guidelines to ensure the longevity and safety of the structure. Inadequate cover thickness can lead to accelerated corrosion of the rebars, resulting in reduced load-bearing capacity, cracking, and ultimately structural failure. Therefore, it is essential to consult the applicable building codes, standards, and design professionals to determine the appropriate cover thickness for steel rebars in a specific construction project.
Q:How do steel rebars affect the fire resistance of a structure?
Steel rebars can have both positive and negative effects on the fire resistance of a structure. On one hand, steel rebars can enhance the fire resistance of a structure by providing additional strength and stability. The presence of steel rebars in concrete structures can help prevent collapse during a fire, allowing more time for occupants to evacuate and emergency responders to control the situation. However, steel rebars also have some drawbacks when it comes to fire resistance. Steel is a highly conductive material, meaning it can transfer heat quickly. During a fire, the steel rebars can heat up and transfer the heat to the surrounding concrete, potentially weakening its structural integrity. This can result in a reduced fire resistance of the structure. To mitigate the negative effects of steel rebars on fire resistance, certain measures can be taken. One common approach is to apply fire-resistant coatings or wraps to the steel rebars. These coatings or wraps act as a barrier, slowing down the heat transfer from the steel to the concrete, thus enhancing the fire resistance. Additionally, the size, spacing, and arrangement of steel rebars can also impact the fire resistance of a structure. Proper design and placement of rebars can ensure that the heat is distributed more evenly, reducing the risk of localized weakening and structural failure. In summary, steel rebars can have a significant impact on the fire resistance of a structure. While they can enhance the overall strength and stability, they can also contribute to the heat transfer and potential weakening of the structure. By implementing appropriate measures such as fire-resistant coatings and proper design, the negative effects of steel rebars on fire resistance can be minimized, ensuring the safety and integrity of the structure during a fire.
Q:What is the effect of steel rebars on the weight of a structure?
Steel rebars have a significant effect on the weight of a structure. Rebars are typically made of steel, which is known for its high strength-to-weight ratio. When incorporated into a structure, these reinforcement bars add strength and rigidity without significantly increasing the overall weight. By reinforcing concrete with steel rebars, the structure becomes better equipped to withstand various forces and stresses, such as tension, compression, bending, and shearing. This reinforcement allows the structure to handle heavier loads and increases its overall durability and longevity. While steel rebars add strength to the structure, they do not significantly contribute to its weight. This is beneficial as it allows for the construction of lighter and more efficient structures. The reduced weight can have several advantages, including lower construction costs, reduced material requirements, decreased transportation costs, and improved seismic performance. Moreover, the use of steel rebars also enables the construction of more slender and aesthetically pleasing structures. The increased strength provided by the rebars allows for the use of thinner concrete sections, resulting in sleek designs and more open spaces. In summary, the effect of steel rebars on the weight of a structure is minimal. Instead, their primary role is to enhance the structural integrity, strength, and durability of the building without adding excessive weight.
Q:What is the process of deforming steel rebars for better adhesion with concrete?
The process of deforming steel rebars for better adhesion with concrete is known as ribbing or rib deformation. This process involves creating small ridges or raised patterns along the surface of the rebar, which enhances the bond between the concrete and the steel. The ribbing process is typically performed through a mechanical operation called cold rolling. Cold rolling is a metalworking process where the steel rebar is passed through a series of rollers, which exert pressure on the surface and cause plastic deformation. The rollers are designed with specific patterns or configurations that create the desired ribbing on the rebar. The purpose of ribbing is to increase the surface area of the rebar in contact with the concrete. The ridges or patterns created by the ribbing process provide additional points of adhesion for the concrete to grip onto, significantly improving the bond strength between the two materials. This enhanced bond is crucial for reinforcing concrete structures, as it helps to distribute loads and resist tensile forces. The ribbing process is commonly used in the construction industry for reinforcing concrete structures such as beams, columns, and slabs. The specific pattern and depth of the ribbing may vary depending on the project requirements and the type of rebar being used. Manufacturers often adhere to industry standards and guidelines to ensure the proper design and placement of ribbed rebars. In summary, the process of deforming steel rebars for better adhesion with concrete involves ribbing or creating ridges on the rebar's surface. This is achieved through cold rolling, where the rebar is passed through rollers designed with specific patterns. Ribbing increases the surface area and provides additional points of adhesion, improving the bond between the concrete and the rebar.

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