Steel Deformed Rebars ASTM GR40 System 1

Steel Deformed Rebars ASTM GR40

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Loading Port:: China Main Port

Payment Terms:: TT or LC

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Product Description:

OKorder is offering Steel Deformed Rebars ASTM GR40 at great prices with worldwide shipping. Our supplier is a world-class manufacturer of steel, with our products utilized the world over. OKorder annually supplies products to African, South American and Asian markets. We provide quotations within 24 hours of receiving an inquiry and guarantee competitive prices.

Product Applications:

Steel Deformed Rebars ASTM GR40 are ideal for structural applications and are widely used in the construction of buildings and bridges, and the manufacturing, petrochemical, and transportation industries.

Product Advantages:

OKorder's Steel Deformed Rebars ASTM GR40 are durable, strong, and wide variety of sizes.

Main Product Features:

· Premium quality

· Prompt delivery & seaworthy packing (30 days after receiving deposit)

· Can be recycled and reused

· Mill test certification

· Professional Service

· Competitive pricing

Product Specifications:

Manufacture: Hot rolled

Grade: ASTM GR40,GR60

Size: 6mm-32mm

Certificates: ISO, SGS, BV, CIQ

Length: 6m – 12m, as per customer request

Packaging: Export packing, nude packing, bundled

DEFORMED BAR
SIZE d(mm)	theoretical kg/m
6	0.222
8	0.395
10	0.617
12	0.888
14	1.21
16	1.58
18	2
20	2.47
22	2.98
25	3.85
28	4.83
32	6.31

FAQ:

Q1: How soon can we receive the product after purchase?

A1: Within three days of placing an order, we will arrange production. The normal sizes with the normal grade can be produced within one month. The specific shipping date is dependent upon international and government factors, the delivery to international main port about 45-60days.

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: what is the difference between actual weight and theoretical weight?

A3: All the section steel has two weights: actual weight and theoretical weight. Actual weight is the weighing out when the product delivered from the mill. Theoretical weight is calculated by pieces. The invoice can be based on each of them as your request.

Images:

Steel Deformed Rebars ASTM GR40

Q: How are steel rebars stored and handled on construction sites?: Steel rebars, also referred to as reinforcing bars, play a vital role in construction projects that involve reinforced concrete structures. To guarantee their safety and effective utilization, these rebars are systematically and meticulously stored and managed on construction sites. Initially, steel rebars are typically delivered to construction sites bundled together and secured with wire or binding materials. Once unloaded from the delivery truck, they are carefully placed in specific areas called rebar yards or cages. These designated spaces are purposefully designed to accommodate the rebars' length, size, and weight, ensuring that they are elevated above the ground and shielded from moisture, dirt, and potential damage. Within the rebar yard, the rebars are commonly arranged horizontally and grouped based on their size, length, and grade. This arrangement enables easy identification and accessibility when required for construction purposes. Moreover, spacers or wooden blocks are often placed between the rebars to prevent direct contact, minimizing the risk of corrosion or entanglement. When it comes to handling steel rebars, construction workers must prioritize safety and adhere to specific guidelines. It is essential to wear personal protective equipment, such as gloves and safety boots, to prevent injuries and maintain a secure grip on the rebars. In certain cases, lifting equipment like cranes or forklifts may be utilized to move and transport the rebars to different areas of the construction site. During transportation, it is crucial to properly secure the rebars to prevent any shifting or falling that could result in accidents. Dragging the rebars on the ground should be avoided, as it can cause damage or deform their shape, compromising their structural integrity. It is of utmost importance to inspect steel rebars before use to ensure they meet the required specifications and are free from any defects. Rusty or damaged rebars should be either discarded or repaired, depending on the severity of the issue. In conclusion, steel rebars are stored and handled with great care and attention on construction sites. Proper storage in designated rebar yards, appropriate grouping and separation, and adherence to safety guidelines during handling are all crucial factors that contribute to the successful and efficient use of steel rebars in construction projects.

Q: Are there any specific safety precautions to be taken while handling steel rebars?: Yes, there are specific safety precautions to be taken while handling steel rebars. Some of these precautions include wearing appropriate personal protective equipment (PPE) such as gloves, safety boots, and eye protection to prevent injuries. It is also important to ensure a safe lifting technique while handling heavy rebars to avoid strains or back injuries. Additionally, workers should be cautious of sharp ends of the rebars and use caution to avoid any cuts or punctures. Regular inspection and maintenance of the rebars is essential to identify any damages or defects that could compromise safety.

Q: Are there any limitations or restrictions on using steel rebars in construction?: Steel rebars in construction have certain limitations and restrictions. Here are some of them: 1. Corrosion: Moisture and certain chemical environments can cause steel rebars to corrode, weakening them over time and compromising the structural integrity of the construction. To address this limitation, protective coatings or stainless steel rebars can be employed. 2. Fire Resistance: When exposed to high temperatures during a fire, steel rebars can lose strength and become malleable, leading to potential structural failure. Fireproof coatings or concrete encasement can enhance the fire resistance of steel rebars. 3. Weight: Large-scale construction projects may face challenges in transportation, handling, and installation due to the significant weight of steel rebars. Additional labor or equipment may be necessary, increasing project costs. 4. Thermal Expansion: Steel's high coefficient of thermal expansion causes it to expand and contract significantly with temperature changes. This can result in thermal stresses and concrete cracking around the rebars. Proper design techniques and the use of expansion joints can mitigate this limitation. 5. Electromagnetic Interference: Steel rebars can interfere with electromagnetic signals used in communication systems or sensitive electronic equipment, which is crucial to consider when constructing buildings with specific requirements, such as hospitals or laboratories. 6. Cost: The cost of steel rebars can fluctuate based on market conditions, availability, and quality, impacting the overall budget of construction projects, especially when large quantities are needed. It is important to acknowledge that despite these limitations, steel rebars are widely used in construction due to their strength, durability, and availability. Proper design, construction techniques, and maintenance can help overcome these limitations, ensuring the safe and efficient use of steel rebars in buildings and infrastructure.

Q: What are the factors that can cause steel rebars to corrode prematurely?: Premature corrosion of steel rebars can be influenced by various factors. Some of these include: 1. Moisture exposure: The presence of moisture is a primary catalyst for rebar corrosion. Prolonged exposure to water or high humidity levels can lead to rust or oxidation on the rebar surface. 2. Chloride ions: The corrosion process of steel rebars can be accelerated by chloride ions, commonly found in seawater or de-icing salts. These ions can enter the concrete cover and come into contact with the rebar, causing faster corrosion. 3. Carbonation of concrete: Concrete carbonation occurs when atmospheric carbon dioxide reacts with the alkaline components of concrete. This process reduces pH levels, diminishing the concrete cover's ability to passivate and increasing the likelihood of rebar corrosion. 4. Inadequate concrete cover: Insufficient concrete cover exposes rebars to external elements like moisture and chloride ions, leading to accelerated corrosion. Poor construction practices or inadequate design specifications can result in insufficient cover. 5. Poor concrete quality: Low-quality concrete used in construction may contain impurities or lack proper curing, making the concrete more permeable. This allows harmful substances like moisture and chlorides to penetrate easily, causing premature rebar corrosion. 6. Galvanic corrosion: Galvanic corrosion occurs when dissimilar metals come into contact in the presence of an electrolyte, such as moisture. For instance, if steel rebars come in contact with aluminum or copper materials, galvanic corrosion can occur. 7. Construction defects: Issues during the construction phase, such as inadequate workmanship or insufficient protective measures, can contribute to premature rebar corrosion. Examples include poor concrete compaction, improper reinforcement placement, or inadequate waterproofing. To prevent premature corrosion of steel rebars, it is essential to use high-quality materials, ensure adequate concrete cover, apply corrosion-resistant coatings or inhibitors, and employ appropriate construction practices. Regular inspections and maintenance can also help identify and address potential corrosion issues before they worsen.

Q: Can steel rebars be used in the construction of hospitals and healthcare facilities?: Yes, steel rebars can be used in the construction of hospitals and healthcare facilities. Steel rebars provide structural strength and reinforcement to concrete, ensuring the stability and durability of the buildings. They are commonly used in foundations, beams, columns, and other critical structural elements of the construction.

Q: What is the role of steel rebars in minimizing the risk of structural collapse?: Steel rebars are of utmost importance in reducing the likelihood of structural collapse in buildings and other construction projects. These rebars, which are commonly referred to as reinforcing bars, are manufactured from steel and are employed to strengthen concrete structures. They augment the concrete's strength and durability, making it more resilient against various forces and decreasing the chances of collapse. One of the primary causes of structural failure lies in the incapability of a building or structure to withstand the forces it encounters. These forces encompass the weight of the structure itself, as well as external forces like wind, earthquakes, and even human activities. Without adequate reinforcement, concrete alone may not have the capacity to endure these forces, thus leading to structural collapse. Strategically positioned within the concrete, steel rebars bolster its tensile strength. While concrete boasts great strength in compression, it is relatively weak in tension. By incorporating steel rebars, the concrete becomes significantly more resistant to tension and can better endure bending and cracking. This reinforcement enables the structure to distribute loads more evenly and prevents localized failures. Furthermore, steel rebars also serve to control and restrict the spread of cracks within the concrete. In the event of crack formation, the rebars function as a barrier, holding the concrete together and preventing further cracking and potential collapse. This role is particularly crucial in regions prone to seismic activities, as the rebars can aid in dissipating and absorbing the energy generated by an earthquake. Aside from their structural function, steel rebars also contribute to the longevity and durability of the concrete structure. By reinforcing the concrete, the rebars help to impede corrosion and degradation caused by environmental factors such as moisture and chemicals. This ensures the integrity and stability of the structure over an extended period, diminishing the risk of collapse due to deterioration. To summarize, the role of steel rebars in minimizing the risk of structural collapse is pivotal. They enhance the strength and durability of the concrete, heightening its ability to withstand various forces and averting failure. Through reinforcing the concrete, rebars distribute loads, regulate crack propagation, and contribute to the structure's longevity, ultimately guaranteeing the safety and stability of buildings and other construction projects.

Q: Can steel rebars be spliced or joined together on-site?: Yes, steel rebars can be spliced or joined together on-site. This is typically done using various methods such as welding, mechanical couplers, or lap splicing techniques, depending on the specific requirements and structural design.

Q: What are the guidelines for using steel rebars in pre-stressed or post-tensioned concrete elements?: The guidelines for using steel rebars in pre-stressed or post-tensioned concrete elements involve several key considerations to ensure structural integrity and performance. 1. Design and Engineering: The first step is to consult with a qualified structural engineer who specializes in pre-stressed or post-tensioned concrete design. They will determine the appropriate size, spacing, and type of rebars required for the specific project based on the structural loads, design requirements, and desired performance. 2. Material Selection: The rebars used in pre-stressed or post-tensioned concrete elements should conform to the relevant industry standards, such as ASTM A615 or ASTM A706 for reinforcing steel. The rebars should have sufficient strength, ductility, and corrosion resistance to withstand the stresses and environmental conditions. 3. Placement and Anchorage: The rebars need to be accurately placed and anchored within the concrete elements. The specific placement and anchorage requirements will depend on the project's design and engineering specifications. The rebars should be properly aligned and secured to ensure effective transfer of forces to the concrete. 4. Tensioning Process: For pre-stressed concrete elements, the rebars are tensioned before the concrete is poured. This process involves applying a predetermined amount of force to the rebars using specialized jacks or hydraulic systems. The tensioning force should be carefully controlled to achieve the desired amount of pre-stress and avoid overloading the rebars or damaging the concrete. 5. Post-Tensioning: In the case of post-tensioned concrete elements, the rebars are tensioned after the concrete has hardened. This is typically done by passing the rebars through ducts or sleeves within the concrete and applying tension using hydraulic jacks. The post-tensioning force should be carefully calibrated to achieve the desired structural performance and avoid excessive strain on the rebars or the concrete. 6. Quality Control and Inspection: Throughout the construction process, regular quality control and inspection should be carried out to ensure compliance with design specifications and industry standards. This includes verifying the correct placement, alignment, and tensioning of the rebars, as well as checking for any defects or damage. 7. Maintenance and Durability: To ensure the long-term durability and performance of pre-stressed or post-tensioned concrete elements, proper maintenance is crucial. This may involve periodic inspections, maintenance of protective coatings, and addressing any signs of corrosion or deterioration promptly. By following these guidelines, construction professionals can ensure the safe and effective use of steel rebars in pre-stressed or post-tensioned concrete elements, resulting in structurally sound and durable concrete structures.

Q: Can steel rebars be used in water treatment facilities?: Yes, steel rebars can be used in water treatment facilities. Steel rebars, or reinforcing bars, are commonly used in construction projects to strengthen concrete structures. In water treatment facilities, where concrete is used for various structures such as tanks, basins, and pipelines, steel rebars are often incorporated to provide added strength and durability. Water treatment facilities involve the treatment of water to make it safe for consumption or other purposes. Concrete is a preferred material in these facilities due to its ability to withstand the harsh conditions of water treatment processes, such as exposure to chemicals, high temperatures, and pressure. Steel rebars are essential in reinforcing the concrete structures to ensure they can withstand these demanding conditions. The corrosion resistance of steel rebars is a critical factor to consider when using them in water treatment facilities. Since water treatment facilities often involve the use of chemicals and exposure to moisture, it is important to choose rebars that have appropriate corrosion protection. This can be achieved by using stainless steel rebars or by applying protective coatings to the rebars. It is also worth noting that proper design, construction, and maintenance practices are essential in ensuring the long-term performance of steel rebars in water treatment facilities. Adequate cover thickness, concrete quality, and proper installation techniques are important considerations to prevent corrosion and ensure the rebars provide the desired structural integrity. In conclusion, steel rebars can be effectively used in water treatment facilities to reinforce concrete structures and provide the necessary strength and durability. However, it is important to choose corrosion-resistant rebars and adhere to proper design and construction practices to ensure their long-term performance in these facilities.

Q: How do steel rebars affect the overall sound insulation of a building?: The overall sound insulation of a building is not directly affected by steel rebars. Steel rebars serve to reinforce concrete structures and offer strength and stability in construction. Sound insulation is primarily determined by the materials and design of walls, floors, and ceilings, as well as the correct installation of acoustic barriers and insulation materials. Although steel rebars can transmit sound to a certain degree due to their density, their impact on sound insulation is usually insignificant when compared to other factors. To achieve sound insulation in buildings, it is necessary to utilize materials with excellent sound absorption properties, such as acoustic insulation panels, mineral wool, or soundproofing barriers.

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